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PHILIPS AUDIO service bulletins and tips


MODEL: MC135
SYMPTOM: RDS information cannot be displayed in area with crowded stations.
CURE: Solution is to shift the VCO frequency of IC505 by changing the value of the following capacitors: C527 : changed from 82pF to 33pF (5322 122 32072) C528 : changed from 47pF to 22pF (5322 122 32143) Measure the frequency at pin 14 of IC505 to be within 4.33204MHz +/- 200kHz. REMARKS : Modification has been implemented in production from week 9749 onwards.
MODEL: MC135
SYMPTOM: Hum is audible at stand-by mode.
CURE: Cut the copper track which pass through the pins of CE556. Connect the grounding point of C523 to JP560 with a jumper wire. Please refer also Service Information A97-588 (4822 725 25646). REMARKS : Modification was implemented in production from week 9742 onwards.
MODEL: MC135
SYMPTOM: Sound muted or distorted at start-up when playing a CD with 2 tracks
CURE: The problem can be solved by adding a resistor of 100 kOhm (4822 116 52234) across C445 on the CD board. REMARKS : Modification has been implemented in production from week 9901 onwards.
MODEL: MC135
SYMPTOM: Display backlight lamps are defective.
CURE: The problem is caused by overvoltage. Following modification on the MAIN BOARD limit the supply voltage: Replace jumper JP626 by a diode 1N4002 (5322 130 30684) in series with a resistor 3,3 Ohm 5% 0,33W (4822 052 10338). - IMPORTANT INFORMATION - As preventive action above modification must be implemented in all sets brought in for repair!!
MODEL: MC135
SYMPTOM: Hum is audible in standby mode
CURE: In Addition to Service Newsletter AS98.01.09, mechanical noise from power transformer might also be audible. To solve this problem, following actions have been taken in production: 1) The construction of the power transformer has been modified. The code number of the improved transformer remains unchanged. It can be recognized by the metal band which is grey in colour. 2) 4 fibre washers between the power transformer and the bottom chassis have been added. The size (id x od x t) of the fibre washer is 4 x 8 x 1mm. It is also available from PCS via service code 4822 532 12975 REMARKS : Modification has been implemented in production from week 9801 onwards.
MODEL: MC135
SYMPTOM: Set does not work at all
CURE: Check whether the leads of the components on the soldering side ofthe pre-amp board are short enough. When the PCB is bent due to mechanical tensions, the leads might touch the metal bracket and short-circuit certain parts of the electronics. Also cut the leads of replaced components as short as possible.
MODEL: MC135
SYMPTOM: Correction to partslist
CURE: Correction to partslist: - The type number of IC200 and IC501 should be corrected to BA4558N. Service codenumber is 4822 209 16265.
MODEL: MC136
SYMPTOM: Sound muted or distorted at start-up when playing a CD with 2 tracks
CURE: The problem can be solved by adding a resistor of 100 kOhm (4822 116 52234) across C445 on the CD board. REMARKS : Modification has been implemented in production from week 9901 onwards.
MODEL: MC136
SYMPTOM: Correction to the Service Manual
CURE: Correction to the Service Manual, Mechanical Partslist The codenumber of the Control Panel (item 52) is wrong. It should read 4822 426 10655.
MODEL: MC145
SYMPTOM: the following parts were added to the service partslist:
CURE: pos code numberarticle description 末末末末末末末末末末末末末末末末末末末末 509 3103 304 66660 button set 菟ower 511 3103 304 65390 cap-IR 513 3103 304 66670 button set 砺olume 514 3103 304 66380 button set + cap 514a 3103 304 66380 button set + cap 516 3103 304 65310 button 都urround
MODEL: MC150
SYMPTOM: Various failures disappear when the set is opened.
CURE: Some connectors can cause intermittent contact. ( Valid for sets from 9646 until 9712) The wiring assemblies are available under: 4822 232 10395 6 pins connector wire 4822 232 10395 4 + 5 pins conn. wire 4822 323 10396 5 pins connector wire 4822 323 10396 6 + 4 pins conn. wire 4822 323 10405 4 + 3 pins conn. wire 4822 323 10405 4 + 4 pins conn. wire
MODEL: MC150
SYMPTOM: The CD part is totally inoperative.
CURE: Check/replace C2514.
MODEL: MC150
SYMPTOM: No sound when switched on after set is switched from LW to Standby
CURE: The fault is caused by IC 7101 TEA5762 (4822 209 90315). It is resolved by the following: a) Changing IC 7101 TEA5762 (4822 209 90315) or b) Adding 1pF chip capacitor (4822 122 32447) across the resonator 5121 or c) Changing the chip resistor 3162 from 150k to 270k (4822 051 20274). REMARKS : This problem may be present in all sets using Tuner 95 board produced before 6th March 1997 (week 9710).
MODEL: MC150
SYMPTOM: The tape mechanism fails and cassette cannot be taken away.
CURE: The problem is due to Cam gear shaft which is cracked. This causes the Cam gear not to return to its stop position. Replacement of control disc (big gear or pos 25) is not recommended because of critical assembly and alignment control. For such problem the complete deck should be replaced. (Reference: Newsletter issue AS97.03 item 03.10) REMARKS : Improved tape mechanism can be recognized by label on the tape mechanism's motor.The label should read: * For MC150, MC170, MC172: 60718xxM/C onwards (year 96, July, 18 onwards) * For FW362, FW363, FW372C, FW373C, FW382V, FW383V, FW395C, FW710C, FW725C, FW730C, FW745C, FW750C, FW770P, FW780P, FW783P, FW788P, FW790P, MC150, MC170, MC172, MX545, MX555, M7C, M17C, M18C, M27C, M28C, M37DC, M38C, M48DC: CWB44..... ....H onwards (H and above ie. H,I,J....) eg. CWB44FR03 7030763IO(70307 ==> 1997-March-07; prod line 63, I=Indonesia, O=latest version)
MODEL: MC150
SYMPTOM: Service Manual
CURE: Service Manual Add to mechanical parts list: The ordering code for Cover, Cassette door Pos. 306 reads 4822 442 00579.
MODEL: MC150
SYMPTOM: Addition to parts list
CURE: Addition to parts list: The service code of item 1290, Loudspeaker Socket in the chapter on Power Board is 4822 265 10967.
MODEL: MC150
SYMPTOM: Codenumber information
CURE: Codenumber information Pos. 1110 / 5280 transformer is 4822 146 10465 For /22 /25 /34 is 4822 146 10465.
MODEL: MC155
SYMPTOM: RDS information cannot be displayed in area with crowded stations.
CURE: Solution is to shift the VCO frequency of IC505 by changing the value of the following capacitors: C527 : changed from 82pF to 33pF (5322 122 32072) C528 : changed from 47pF to 22pF (5322 122 32143) Measure the frequency at pin 14 of IC505 to be within 4.33204MHz +/- 200kHz. REMARKS : Modification has been implemented in production from week 9749 onwards.
MODEL: MC155
SYMPTOM: Sound muted or distorted at start-up when playing a CD with 2 tracks
CURE: The problem can be solved by adding a resistor of 100 kOhm (4822 116 52234) across C445 on the CD board. REMARKS : Modification has been implemented in production from week 9901 onwards.
MODEL: MC155
SYMPTOM: Display backlight lamps are defective.
CURE: The problem is caused by overvoltage. Following modification on the MAIN BOARD limit the supply voltage: Replace jumper JP626 by a diode 1N4002 (5322 130 30684) in series with a resistor 3,3 Ohm 5% 0,33W (4822 052 10338). - IMPORTANT INFORMATION - As preventive action above modification must be implemented in all sets brought in for repair!!
MODEL: MC155
SYMPTOM: Correction to partslist
CURE: Correction to partslist: - The type number of IC200 and IC501 should be corrected to BA4558N. Service codenumber is 4822 209 16265.
MODEL: MC156
SYMPTOM: Sound muted or distorted at start-up when playing a CD with 2 tracks
CURE: The problem can be solved by adding a resistor of 100 kOhm (4822 116 52234) across C445 on the CD board. REMARKS : Modification has been implemented in production from week 9901 onwards.
MODEL: MC165
SYMPTOM: The CD Tray cannot be closed and the display shows 釘LOCK.
CURE: The gears of the CD loader are out of coupling because of external force or physical block of the tray during sliding out. If it cannot be resumed, the gears must be re-aligned as shown on page 14-2 of Service Manual 4722 725 26195 resp. 4822 725 26213. IRIS CODE: A562 IRIS CODE: 2351
MODEL: MC165
SYMPTOM: Correction to the Service Manual, Electrical partslist
CURE: The service codenumbers of the Mains Transformers have been mixed up. They should read: 4822 146 11104 for /01 and /11 versions 4822 146 11105 for /02, /05, /10 and /14 versions 4822 146 11106 for /37 version
MODEL: MC170
SYMPTOM: Various failures disappear when the set is opened.
CURE: Some connectors can cause intermittent contact. ( Valid for sets from 9646 until 9712) The wiring assemblies are available under: 4822 232 10395 6 pins connector wire 4822 232 10395 4 + 5 pins conn. wire 4822 323 10396 5 pins connector wire 4822 323 10396 6 + 4 pins conn. wire 4822 323 10405 4 + 3 pins conn. wire 4822 323 10405 4 + 4 pins conn. wire
MODEL: MC170
SYMPTOM: Loudspeaker Boxes moves on smooth surface during high sound level
CURE: During high sound reproduction level, the loudspeaker moves when placed on smooth surface due to vibration. This problem can be resolved by adding 4 pieces of rubber foot to keep it in position. The service code for rubber foot is 4822 462 40683
MODEL: MC170
SYMPTOM: No sound when switched on after set is switched from LW to Standby
CURE: The fault is caused by IC 7101 TEA5762 (4822 209 90315). It is resolved by the following: a) Changing IC 7101 TEA5762 (4822 209 90315) or b) Adding 1pF chip capacitor (4822 122 32447) across the resonator 5121 or c) Changing the chip resistor 3162 from 150k to 270k (4822 051 20274). REMARKS : This problem may be present in all sets using Tuner 95 board produced before 6th March 1997 (week 9710).
MODEL: MC170
SYMPTOM: The tape mechanism fails and cassette cannot be taken away.
CURE: Replacement of control disc (pos 25 in MC170) is not recommended because of critical assembly and alignment control. Replace the complete deck. REMARKS : Improved tape mechanism can be recognized by label on the tape mechanism's motor.The label should reads: a) CWB44FR03 ......H onwards eg. CWB44FR03 6102805AH for FW395C b) 60718xxM/C onwards (year 96, July, 18 onwards) for MC170.
MODEL: MC170
SYMPTOM: The tape mechanism fails and cassette cannot be taken away.
CURE: The problem is due to Cam gear shaft which is cracked. This causes the Cam gear not to return to its stop position. Replacement of control disc (big gear or pos 25) is not recommended because of critical assembly and alignment control. For such problem the complete deck should be replaced. (Reference: Newsletter issue AS97.03 item 03.10) REMARKS : Improved tape mechanism can be recognized by label on the tape mechanism's motor.The label should read: * For MC150, MC170, MC172: 60718xxM/C onwards (year 96, July, 18 onwards) * For FW362, FW363, FW372C, FW373C, FW382V, FW383V, FW395C, FW710C, FW725C, FW730C, FW745C, FW750C, FW770P, FW780P, FW783P, FW788P, FW790P, MC150, MC170, MC172, MX545, MX555, M7C, M17C, M18C, M27C, M28C, M37DC, M38C, M48DC: CWB44..... ....H onwards (H and above ie. H,I,J....) eg. CWB44FR03 7030763IO(70307 ==> 1997-March-07; prod line 63, I=Indonesia, O=latest version)
MODEL: MC170
SYMPTOM: Correction Service Manual 4822 725 25187
CURE: Correction Service Manual 4822 725 25187 The service code for the Tweeter should be 4822 240 70274 instead of 4822 247 70274.
MODEL: MC172
SYMPTOM: POS stickers on cassette doors and Loudspeaker boxes cannot be removed
CURE: The stain-mark left behind from POS stickers can be removed by any cleaning fuids that do not attact the plastic surfaces. One effective remover is the Contact Cleaner spray available in most service workshops, the ordering code is 4822 389 50091.
MODEL: MC172
SYMPTOM: No sound when switched on after set is switched from LW to Standby
CURE: The fault is caused by IC 7101 TEA5762 (4822 209 90315). It is resolved by the following: a) Changing IC 7101 TEA5762 (4822 209 90315) or b) Adding 1pF chip capacitor (4822 122 32447) across the resonator 5121 or c) Changing the chip resistor 3162 from 150k to 270k (4822 051 20274). REMARKS : This problem may be present in all sets using Tuner 95 board produced before 6th March 1997 (week 9710).
MODEL: MC172
SYMPTOM: The tape mechanism fails and cassette cannot be taken away.
CURE: The problem is due to Cam gear shaft which is cracked. This causes the Cam gear not to return to its stop position. Replacement of control disc (big gear or pos 25) is not recommended because of critical assembly and alignment control. For such problem the complete deck should be replaced. (Reference: Newsletter issue AS97.03 item 03.10) REMARKS : Improved tape mechanism can be recognized by label on the tape mechanism's motor.The label should read: * For MC150, MC170, MC172: 60718xxM/C onwards (year 96, July, 18 onwards) * For FW362, FW363, FW372C, FW373C, FW382V, FW383V, FW395C, FW710C, FW725C, FW730C, FW745C, FW750C, FW770P, FW780P, FW783P, FW788P, FW790P, MC150, MC170, MC172, MX545, MX555, M7C, M17C, M18C, M27C, M28C, M37DC, M38C, M48DC: CWB44..... ....H onwards (H and above ie. H,I,J....) eg. CWB44FR03 7030763IO(70307 ==> 1997-March-07; prod line 63, I=Indonesia, O=latest version)
MODEL: MC172/30
SYMPTOM: Correction parts list
CURE: Correction parts list - The service code for the microprocessor should be 4822 209 15766 with marking 170S51551 instead of 4822 209 15767 published on page 6-6 in the Service Manual.
MODEL: MC175
SYMPTOM: The CD Tray cannot be closed and the display shows 釘LOCK.
CURE: The gears of the CD loader are out of coupling because of external force or physical block of the tray during sliding out. If it cannot be resumed, the gears must be re-aligned as shown on page 14-2 of Service Manual 4722 725 26195 resp. 4822 725 26213. IRIS CODE: A562 IRIS CODE: 2351
MODEL: MC175
SYMPTOM: Correction to the Service Manual, Electrical partslist
CURE: The service codenumbers of the Mains Transformers have been mixed up. They should read: 4822 146 11104 for /01 and /11 versions 4822 146 11105 for /02, /05, /10 and /14 versions 4822 146 11106 for /37 version
MODEL: MC175
SYMPTOM: Correction to the Service Manual, Frontboard
CURE: Correction to the Service Manual, Frontboard: - Following parts have been added/changed from production start onwards: Capacitor 2430 changed from 100pF to 470nF (4822 126 13482) Jumper 9440 replaced by resistor 3525, 47 Ohm (4822 116 52195) Resistor 3526, 680 kOhm (4822 051 20684) added Resistor 3527, 1 MOhm (4822 051 20105) added REMARKS : 2 3 5 C IRIS CODE
MODEL: MK2
SYMPTOM: VCR flyback lines in NTSC mode
CURE: The following production changes have been introduced in eliminate VCR flyback lines in NTSC mode from week 9303 onwards. Replace R3470 in the sync part by 180k (4822 116 52252) Replace C2820 in the frame part by 3n3 (4822 122 33532) Replace R3843 in the frame part by 9k1 (4822 116 52306) NOTE: In case of specific complaint affecting earlier models, these changes can be applied as a service solution.
MODEL: MK2
SYMPTOM: Squeaking sound in starting up set from stand-by
CURE: Replace 3619 by 270k (4822 116 52265) REMARKS : Introduced in production week 9209
MODEL: MK2
SYMPTOM: Failure of SOPS transistor at hot temperature
CURE: Replace 2143 by 270p (4822 126 11976) REMARKS : Introduced in production week 9217.
MODEL: MK2
SYMPTOM: Jittering and bad performance TXT
CURE: - Replace 3843 by 7k5 (4822 116 52299) in frame part 25/28 - Replace 3740 by 240k (4822 116 52262) in sync part 25/28 - Replace 7800 by PCF84C81AP (4822 209 31069) and add 2k2 (4822 051 20222) at 3850 and 3852. REMARKS: Introduced
MODEL: MK2
SYMPTOM: Correction service manual MK2 AB (4822 727 19786)
CURE: Correction service manual MK2 AB (4822 727 19786) and Service Information MK2 92.02 (4822 727 19787) - In the service manual chassis MK2 AB (4882 727 19786) and service information MK2 92.02 (4822 727 19787) at the electrical diagram of the CRT panel for all 3 RGB amplifiers: R3118 and anode D6115 should be connected to emmitters of TS7115/7116 R3138 and anode D6135 should be connected to emmitters of TS7135/7136 R3158 and anode D6155 should be connected to emmitters of TS7155/7156 Please correct and inform your repair market.
MODEL: MS6050
SYMPTOM: A plop noise is recorded at the beginning and ending of a recording
CURE: The noise is caused by the time difference between activation of the motor switch and the record switch.The record switch is adjusted to shorten the time difference so that problem is minimised. Situation becomes worse because the record switch can be located afterwards.For service solution, adjust the position of the record switch so that the switch can be activated earlier. Add glue to protect record switch getting loose. REMARKS : Glue for fitting the switch has been added in production sets from week 9542 onwards. For long term, the location of the record switch has been changed. It will be mounted near the middle of the record lever so that the time difference can been further shortened.Modified mechanism has been introduced in production from week 9621 onwards.
MODEL: MS6500
SYMPTOM: CD does not start-up or uses too long time to start-up (8-10 sec.)
CURE: Fault is caused by the cross-talk between track and focus servo. The problem can be corrected by the following actions: 1. Replace J112, where temporarily a 1 ohm resistor was mounted, by a jumper wire. J112 can be found on CD Main Board (layout diagram), near IC104 pin2. With this jumper pin2 of IC104 is connected to ground. 2. Change R106 from 39k to 33k (4822 050 23303). One side of R106 is connected to IC101 pin72 (HF SUM). 3. Change C108 from 330pF to 220pF (5322 122 32346). One side of C108 is connected to IC101 pin69 (BH). After this modification: Check the E/F balance for a value within range: 40mV plus/minus 20mV. REMARKS : 1.This modifaction has been implemented in production from week 9546 onwards. 2.CHANGING THE COMPLETE CD-DRIVE WILL NOT SOLVE THE PROBLEM SATISFACTORILY
MODEL: MV615
SYMPTOM: Set blocked, display dark, head disk makes small movements
CURE: Replace T7261 and T7262 on Family board
MODEL: MV615
SYMPTOM: First timer block cannot be erased, even not by a memory clear
CURE: Change EEPROM, pos 7270 on family board, 4822 209 33548. EEPROMs with printing on IC CSi can have this fault. EEPROMs with printing ST MAI or ATMEL are OK. The bad ones have not been used since february 1996. The stock in Eindhoven is OK.
MODEL: MX520
SYMPTOM: NO DISC is shown on the display when trying to play a disc.
CURE: The reason for this failure is the critical software timing control in the slave micro-processor IC7830 (software version V76); Service codenumber: 4822 209 33407 with printing mark CDC50763. Under such situation the CDM mechanism is already lifted up into the clamper before the carriage (with disc) is able to reach the play position due to mechanical frictional forces on the moving carriage. This problem is solved temporarily in production by adding resistor 3854: 470k 5% 0.1W; service code number: 4822 051 20474. The resistor is mounted in parallel across resistor 3841. This solution is implemented in production for printed circuit boards marked .4 and onwards. After the implementation in production of new software version V70 of the slave micro-processor (service code number: 4822 209 90358 with printing mark CDC50921), the resistor 3854 has been deleted again. Therefore, one has to ensure in that case, the resistor 3854 has to be removed too if a defective version V76 slave 覬rocessor has been replaced by a new version V70 (or lower) micro-processor. REMARKS : NB: The point number of the printed circuit board is the last digit of the board code number situated next to the flex cable socket 1850 on the decoder board. The version of the slave micro-processor can also easily be read when it is displayed during the Service test mode.
MODEL: MX520
SYMPTOM: Scratch marks found on the disc directly above the playing disc.
CURE: This fault is due to the distance between the disc stored directly above the playing disc and the playing disc. The playing disc is damaging that disc in the stocker. To solve this problem the brackets (item 10 and 14) and spring (item 70) have been modified. New item 10 can be ordered under service code number: 4822 404 21346. New item 14 can be ordered under service code number: 4822 404 21347. Modified spring item 70 can be ordered with the same code number: 4822 492 42713. Below please find the procedure to replace the brackets and spring after removing the 7-disc changer from the set (see disassembly drawing in the service manual). Disassemble the top part: 1.Remove 8 screws, item 105 2.Lift the top cover assembly, item 39; CD Decoder Board, and clamper chassis assembly, item 48 to the left side. 3.Remove the stocker assembly, item 37 (including the carriage, item 35/36), with the help of a flat screw driver. Replace the bracket-R, item 10 and spring, item 70: 4.Unlock the small PC Board, item 90 on the right side and remove spring, item 70. Unlock the bracket-R, item 10. 5.Grease the rubbing surface of the new bracket with grease, service code: 4822 390 20139. 6.Assemble the new bracket-R by pushing it into the present slots and sliding it towards the rear. Assemble the new spring into its position and secure it with glue before remounting the small PC Board. Take care that switch lever item 7 is in correct position. Replace the bracket-L, item 14: 7.Remove 4 screws, item 105 on the left side and lift the side chassis-L, item 13 so that bracket-L, item 14 clears the lever carriage, item 16. 8.Unlock the bracket-L, item 14. 9.Grease the rubbing surface of the new bracket with grease, service code: 4822 390 20139. 10.Assemble the new bracket-L by pushing it into the present slots and sliding it towards the rear. Push the side chassis into the bottom chassis, item 1 and remount the 4 screws. Care should be taken to ensure that the lever carriage, item 16 is in between item 14 and item 16. Replace the top part: 11.Re-assemble the stocker assembly unit ensuring the side pins are properly engaged into the lever stocker, item 22/24. 12.Re-assemble the top cover assembly, decoder board and clamper chassis assembly and remount the 8 screws. REMARKS : New parts are introduced from week 9518 onwards.
MODEL: MX520
SYMPTOM: Spare part information
CURE: Spare part information Pos 48 for the CDC mechanism is now available as service spare part. The 12NC is 4822 401 11681Chassis clamper.
MODEL: MX520
SYMPTOM: Spare part information
CURE: Spare part information The following parts of the CDC-7 mechanism are now available as service parts: Position no. Description Service code -- Pos 7Lever switch4822 277 11473 Pos 34 Stocker 4822 256 92294
MODEL: MX545
SYMPTOM: Various failures disappear when the set is opened.
CURE: Some connectors can cause intermittent contact. ( Valid for sets from 9646 until 9712) The wiring assemblies are available under: 4822 232 10395 6 pins connector wire 4822 232 10395 4 + 5 pins conn. wire 4822 323 10396 5 pins connector wire 4822 323 10396 6 + 4 pins conn. wire 4822 323 10405 4 + 3 pins conn. wire 4822 323 10405 4 + 4 pins conn. wire
MODEL: MX545
SYMPTOM: Cassette door jams because R/P head is fully retracted after STOP
CURE: The is due to Cam Gear screw hole cracked. The problem can only be solved by replacing the complete deck. Improved tape mechanism is implemented into production from week 9743 onwards. REMARKS : See also newsletter information AS97.03.08 and AS97.04.07.
MODEL: MX545
SYMPTOM: The tape mechanism fails and cassette cannot be taken away.
CURE: The problem is due to Cam gear shaft which is cracked. This causes the Cam gear not to return to its stop position. Replacement of control disc (big gear or pos 25) is not recommended because of critical assembly and alignment control. For such problem the complete deck should be replaced. (Reference: Newsletter issue AS97.03 item 03.10) REMARKS : Improved tape mechanism can be recognized by label on the tape mechanism's motor.The label should read: * For MC150, MC170, MC172: 60718xxM/C onwards (year 96, July, 18 onwards) * For FW362, FW363, FW372C, FW373C, FW382V, FW383V, FW395C, FW710C, FW725C, FW730C, FW745C, FW750C, FW770P, FW780P, FW783P, FW788P, FW790P, MC150, MC170, MC172, MX545, MX555, M7C, M17C, M18C, M27C, M28C, M37DC, M38C, M48DC: CWB44..... ....H onwards (H and above ie. H,I,J....) eg. CWB44FR03 7030763IO(70307 ==> 1997-March-07; prod line 63, I=Indonesia, O=latest version)
MODEL: MX545
SYMPTOM: Repair hint on Tape mechanism
CURE: Repair hint on Tape mechanism - During repair or when the Tape mechanism needs to be reset for any reason, the flywheel can be turned manually in clockwise direction only.Turning in counter clockwise direction will dent or damage some of the gears in the mechanism. REMARKS : For more details see Newsletter AS97.03 item 03.08
MODEL: MX555
SYMPTOM: Cassette door jams because R/P head is fully retracted after STOP
CURE: The is due to Cam Gear screw hole cracked. The problem can only be solved by replacing the complete deck. Improved tape mechanism is implemented into production from week 9743 onwards. REMARKS : See also newsletter information AS97.03.08 and AS97.04.07.
MODEL: MX555
SYMPTOM: The tape mechanism fails and cassette cannot be taken away.
CURE: The problem is due to Cam gear shaft which is cracked. This causes the Cam gear not to return to its stop position. Replacement of control disc (big gear or pos 25) is not recommended because of critical assembly and alignment control. For such problem the complete deck should be replaced. (Reference: Newsletter issue AS97.03 item 03.10) REMARKS : Improved tape mechanism can be recognized by label on the tape mechanism's motor.The label should read: * For MC150, MC170, MC172: 60718xxM/C onwards (year 96, July, 18 onwards) * For FW362, FW363, FW372C, FW373C, FW382V, FW383V, FW395C, FW710C, FW725C, FW730C, FW745C, FW750C, FW770P, FW780P, FW783P, FW788P, FW790P, MC150, MC170, MC172, MX545, MX555, M7C, M17C, M18C, M27C, M28C, M37DC, M38C, M48DC: CWB44..... ....H onwards (H and above ie. H,I,J....) eg. CWB44FR03 7030763IO(70307 ==> 1997-March-07; prod line 63, I=Indonesia, O=latest version)
MODEL: MX555
SYMPTOM: Repair hint on Tape mechanism
CURE: Repair hint on Tape mechanism - During repair or when the Tape mechanism needs to be reset for any reason, the flywheel can be turned manually in clockwise direction only.Turning in counter clockwise direction will dent or damage some of the gears in the mechanism. REMARKS : For more details see Newsletter AS97.03 item 03.08
MODEL: MX732
SYMPTOM: Some sets are delivered with wrong AM grid 10 kHz instead of 9 kHz.
CURE: The sets can be adapted by local service workshop according following procedures : 1. Remove jumper J284 (on Front board) 2. Add jumper J283.
MODEL: MX900
SYMPTOM: Audio Output IC TDA7262 damaged.
CURE: Replace IC TDA7262 with service codenumber 4822 209 15422. We suggest to replace also the power transformer with a new service codenumber 4822 146 11034.
MODEL: MX960AHT
SYMPTOM: The set does not work and display shows CHECK OWNER S MANUAL.
CURE: The connector CN808 on the CD decoder board is not properly connected. Fix the connector properly.
MODEL: MX960PRO
SYMPTOM: The set does not work and display shows CHECK OWNER S MANUAL.
CURE: The connector CN808 on the CD decoder board is not properly connected. Fix the connector properly.
MODEL: MX975D
SYMPTOM: broadcasting traffic announcements, set might switch to stand-by
CURE: When the set is tuned to a station with RDS-EON, and this station sends EON information that another station is currently broadcasting traffic announcements TA, the set might switch to stand-by mode for approx. 4 seconds. During these 4 seconds there is no voltage available on the AC mains outlets. Please note that the phenomenon can also occur when the set is playing other sources (i.e. CD), as the tuner is continuously monitoring the RDS and EON signal. The problem is solved by replacing microprocessor IC 7415 (located on front board) by the new version v35 3103 308 83880. REMARKS : New microprocessors are used in production from week 9941 onwards. The software version can be read out via the service test program. Versions v35 and higher are OK.
MODEL: MX975D
SYMPTOM: Set might switch to stand-by mode for approx. 4 seconds
CURE: Complete symptom: When the set is tuned to a station with RDS-EON, and this station sends EON information that another station is currently broadcasting traffic announcements TA, the set might switch to stand-by mode for approx. 4 seconds. During these 4 seconds there is no voltage available on the AC mains outlets. Please note that the phenomenon can also occur when the set is playing other sources (i.e. CD), as the tuner is continuously monitoring the RDS and EON signal. CURE : The problem is solved by replacing microprocessor IC 7415 (located on front board) by the new version v35 - 3103 308 83880. REMARKS : New microprocessors are used in production from week 9941 onwards. The software version can be read out via the service test program. Versions v35 and higher are OK. 5 8 2 C IRIS CODE
MODEL: MX975D
SYMPTOM: Correction to the Service Manual, Electrical partslist
CURE: Monobard FR960 (page 13-4) and Monobard FR970 (page 14-4) The following items should read: pos. service codearticle description 末末末末末末末末末末末末末末末末末末末 3587 4822 051 20392 3.9kE 5% 0.1W 3588 4822 116 52276 3.9kE 5% 0.5W 3593 4822 051 20472 4.7kE 5% 0.1W 3594 4822 051 20472 4.7kE 5% 0.1W 3597 4822 116 52289 5.6kE 5% 1/6W 3598 4822 116 52289 5.6kE 5% 1/6W REMARKS : Electrical diagram is correct (page 10-4).
MODEL: MZ-3
SYMPTOM: No sound output, resistor 3363 is blown.
CURE: Change resistor 3363 from 22R to a 10R NFR-type
MODEL: MZ-33
SYMPTOM: No sound output, resistor 3363 is blown.
CURE: Change resistor 3363 from 22R to a 10R NFR-type
MODEL: MZ7/34
SYMPTOM: FM 65.81-74MHz cannot be tuned on the set
CURE: All Mini Systems 1999 versions /34 are set to the default FM range of 87.5-108MHz when leaving the factory. The lower FM1 range of 65.81-74MHz can be turned on by holding the undermentioned keys depressed, while switching on the mains supply: a) 典uner & 鉄earch Up for all models except the MZ7/34 b) 典uner & 哲ext for MZ7/34 only The display shows 擢M1 ON. REMARKS : By repeating the procedure the FM1 range will be switched off again.
MODEL: MZ7/34
SYMPTOM: FM 65.81-74MHz cannot be tuned on the set (IRIS CODE 121X)
CURE: All Mini Systems 1999 versions /34 are set to default FM range of 87.5-108MHz before leaving the factory.The lower FM1 range of 65.81-74MHz can be turn on by holding down the undermentioned keys while switching on the Mains supply to the set: a) Tuner & Search Up for all models except the MZ7/34 b) Tuner & Next for MZ7/34 only The display will shows FM1 ON. By repeating the procedure the FM1 will be switched off.
MODEL: N7600
SYMPTOM: Record button blocks
CURE: Check positioning of bracket for record protection.
MODEL: NC1032
SYMPTOM: The alarm time increases with two hours during adjusting.
CURE: Check clock IC.
MODEL: NC1032
SYMPTOM: Sometimes several segments of the display do not light up.
CURE: Check solder joints of the PCB.
MODEL: NC1032
SYMPTOM: During alarm time adjustment time jumps from xx:25 to xx:36.
CURE: Check clock IC.
MODEL: NC1400
SYMPTOM: The clock does not switch on the buzzer alarm
CURE: Check slodering of leg 16 of the clock IC
MODEL: NC1400
SYMPTOM: Sound level of radio and buzzer very low
CURE: Check radio IC CXA1019S.
MODEL: NC2032
SYMPTOM: Radio part can not be switched off.
CURE: Check whether there is a short circuit over switch SW3.
MODEL: NC2032
SYMPTOM: Sometimes several segments of the display do not light up.
CURE: Check solder joints of the PCB.
MODEL: NC3
SYMPTOM: +22V supply change
CURE: +22V supply change A production change has been introduced to the +22 volt supply (see below). Receivers affected are coded TY02 and higher. Description old value new value code no. R416 changed 10
MODEL: NC3012
SYMPTOM: In the off position still a weak sound is audible.
CURE: Replace Capacitor C54, value 22nF, by a better quality ceramic capacitor (i.e. 4822 126 12147).
MODEL: NC3CR
SYMPTOM: Background whistle
CURE: On some receivers, the programme sound may be accompanied by a@whistle (about 4kHz) in the background.This can be suppressed by increasing the value of C2327 from 4.7uF to 47uF (code no. 4822 124 22056).It is also recommended that the adjustment of quadrature coil L5221 should be carefully checked to ensure maximum AM rejection.
MODEL: NC3-CR
SYMPTOM: No colour.
CURE: Check/replace C2624 (12pF; 4822 122 31056). If defective it will cause the chroma X-tal to run at the wrong frequency.
MODEL: NC3-CR
SYMPTOM: Picture upside down and inside out
CURE: Check R 3581 (3M9; 4822 116 52524) on pin 2 of Sync IC 7220-3B for open circuit.
MODEL: ND2022
SYMPTOM: Correction of electrical partslist
CURE: Correction of electrical partslist Item S204 (push switch) should read 4822 276 13253 instead of 4822 276 13254.
MODEL: ND2524
SYMPTOM: Correction of electrical partslist
CURE: Correction of electrical partslist Item S204 (push switch) should read 4822 276 13253 instead of 4822 276 13254.
MODEL: ND5500
SYMPTOM: Correction of electrical partslist
CURE: Correction of electrical partslist The correct service code should read : J1 Socket-Ext. DC 4822 265 20685.
MODEL: ND6500
SYMPTOM: Intermittent fault of CD. Turntable does not start-up/skips tracks.
CURE: Check the copper pattern of the CD decoder board. A copper track of the CD decoder board might be interrupted. REMARKS : From week 9502 onwards, the decoder board with improved copper pattern lay-out has been used in production.
MODEL: ND6500
SYMPTOM: Set skips tracks especially at the end of the disc.
CURE: Replace CD-lid by a modified type. (4822 444 60986)
MODEL: ND6500
SYMPTOM: AC cords
CURE: AC cords For ND7500 and ND6500 series (including AZ8310 and AZ8006) the following common AC cord sets can be used. For Europe : 4822 321 10831 For U.K. : 4822 321 10918 For U.S.A. : 4822 321 10883
MODEL: ND6500
SYMPTOM: Correction
CURE: Correction In Service Information A94-576 (4822 725 25358), the test points were erroneously not given. Please add on page 23 (circuit diagram) the location of test points as described below: TP1 = junction of RV103 and JP1 TP2 = pin 18 of U101 TP3 = junction of R111 and JP1 TP4 = pin 31 (RF) of U101 TP5 = pin 1 of U101 TP6 = junction of RV104 and JP2
MODEL: ND6600
SYMPTOM: CD player inoperative. Also no display.
CURE: Power supply at CD pcb defective. Q1 is defective (BC369)
MODEL: ND6600
SYMPTOM: No CD function, CD part has no +5V power supply.
CURE: Problem is caused by the heat sink of Q8 which causes a short circuit between the mass side of R6 and the collector of Q8. This fault can be solved by removing the resistor R6 from component side to copper track side. This solution has been applied in production too, as a temporary solution. REMARKS : This sympthom/cure is only valid for sets with production code KY00. In these sets CDM12.1 and concerned Philips ICs have been applied. From week 9537 onwards the printed board has been modified to locate R6 away from the heat sink.
MODEL: ND6600
SYMPTOM: The CD does not playback any disc, when cold.
CURE: Check capacitor C71
MODEL: ND6600
SYMPTOM: The cassette door damper gear (item 14) moves out easily.
CURE: The cassette door (item 2; 4822 443 64542) has been modified by adding a rib to prevent the gear from moving off. REMARKS : New Doors are used in production with sets marked KY02 from week 9604 onwards. Consumer Service stock has been adapted.
MODEL: ND6600
SYMPTOM: Modification
CURE: Modification From September 1995 onwards, with factory code starting from KY0195, new CD Deck Mechanism and Main board are used. More details are published in Service Information A95-572 REMARKS : This publication is followed by Service Information A95-572
MODEL: ND7500
SYMPTOM: Set sometimes stops and gives 0000
CURE: Check pin of CN4 (connector from doorswitch).
MODEL: ND7500
SYMPTOM: Set skips tracks during moving the set just a little.
CURE: Re-adjust tracking gain potmeter P102.
MODEL: ND7500
SYMPTOM: The CD part does not produce any audio signal.
CURE: Check print track near R184 for interruption.
MODEL: ND7500
SYMPTOM: The CD skips tracks during any small movement of the set.
CURE: Adjust tracking gain (P102)
MODEL: ND7500
SYMPTOM: The CD player does not accept the disc and gives no disc error.
CURE: Check CD mechanism.
MODEL: ND7500
SYMPTOM: CD does not read-in and gives ER, CD turns the wrong way.
CURE: Check soldering of IC101 or JM24.
MODEL: ND7500
SYMPTOM: The CD skips tracks.
CURE: Re-adjust 102 (tracking gain).
MODEL: ND7500
SYMPTOM: CD does not read-in focus, CD part gives error.
CURE: Check soldering of IC102 and IC101.
MODEL: ND7500
SYMPTOM: CD does not start after closing the lid.
CURE: Check/remount lid switch.
MODEL: ND7500
SYMPTOM: AC cords
CURE: AC cords For ND7500 and ND6500 series (including AZ8310 and AZ8006) the following common AC cord sets can be used. For Europe : 4822 321 10831 For U.K. : 4822 321 10918 For U.S.A. : 4822 321 10883
MODEL: ND7500
SYMPTOM: Codenumber information
CURE: Codenumber information The Handle Bracket Left (4822 498 10501) is no longer available. We suggest to use Handle Bracket Right (pos.36; 4822 498 10502) as a substitute.The stopper end has to be cut. REMARKS : See also service newsletter issue PA98.05.
MODEL: ND7500
SYMPTOM: Codenumber information
CURE: Codenumber information The CD cushion (4822 466 93447) is replaced by the following two codenumbers : 4822 466 93498Cushion (hard) 4822 466 93499Cushion (soft) The two cushions near the motors are harder.
MODEL: ND7500
SYMPTOM: Service Manual
CURE: Service Manual Version ND7500/46 was introduced since December 1993. For repair information please refer to service manual ND7500/48/59 (4822 725 24549) except the Cassette Door (L) which is available with service code number 4822 444 60944.
MODEL: ND7500
SYMPTOM: Service Manual, Mechanical partslist
CURE: Service Manual, Mechanical partslist: - The CD lens cover bracket (item 75 in exploded view diagram on page 18) is now available via service code 4822 402 10201.
MODEL: ND7500
SYMPTOM: Modification
CURE: Modification From week 9510 onwards, a new CD chassis (decoder board and control board) is used because the old CD chassis is no longer supplied. The copper track of the CD board has been thickened to improve solder quality. At the same time the power amplifier IC (IC7) is changed from LA4597 to TA8238K Service information A95-555 (4822 725 25386) is published to introduce new circuit diagram, Printed Circuit Board layout diagram, alignment and partslist. REMARKS : Modified sets can be recognized by changed factory code: KZ02 (serial number KZ029510xxxxx). This publication will be followed by Service Information A95-555.
MODEL: ND7600
SYMPTOM: No CD function, CD part has no +5V power supply.
CURE: Problem is caused by the heat sink of Q8 which causes a short circuit between the mass side of R6 and the collector of Q8. This fault can be solved by removing the resistor R6 from component side to copper track side. This solution has been applied in production too, as a temporary solution. REMARKS : This sympthom/cure is only valid for sets with production code KY00. In these sets CDM12.1 and concerned Philips ICs have been applied. From week 9537 onwards the printed board has been modified to locate R6 away from the heat sink.
MODEL: ND7600
SYMPTOM: Deck B does stop winding after some time
CURE: The axle of reel (pos52) is bent. Rebend axle.
MODEL: ND7600
SYMPTOM: CD part defective. No focus, no display.
CURE: Check Q8. (4822 130 40824)
MODEL: ND7600
SYMPTOM: CD player inoperative. Does not start up.
CURE: Check/replace IC U5 (SAA7345GP; 4822 209 33339).
MODEL: ND7600
SYMPTOM: Modification
CURE: Modification In course of production the potentiometers VR1, VR4, VR5 and VR6 have been changed. The new potentiometers are available via following service codenumbers: VR1 : 4822 101 11373 VR4 to VR6 : 4822 105 11133 REMARKS : The potentiometers can be distinguished by their pin layout: Old potentiometers : 4 pins in 1 row New potentiometers : 4 pins in 2 rows
MODEL: ND7600
SYMPTOM: Modification
CURE: Modification From September 1995 onwards, with factory code starting from KY0195, new CD Main board and CD Deck Mechanism are used. More details are published in Service Information A95-570 REMARKS : This publication is followed by Service Information A95-570
MODEL: ND7600
SYMPTOM: Service Manual, Mechanical partslist
CURE: Service Manual, Mechanical partslist The Cassette Door is assembled of two parts : Item 4Cassette Door Assy (R) : 4822 256 10318Cassette Door Holder (R) 4822 443 64604Cassette Door Cover (R) Item 5Cassette Door Assy (L) : 4822 256 10317Cassette Door Holder (L) 4822 443 64603Cassette Door Cover (L)
MODEL: ND7600
SYMPTOM: Service Manual, Mechanical partslist
CURE: Service Manual, Mechanical partslist: - The CD lens cover bracket (item 115 in exploded view diagram on page 15-3) is now available via service code 4822 402 10201.
MODEL: NR2533
SYMPTOM: Totally inoperative.
CURE: Check the mains transfomer (4822 146 31113).
MODEL: NR2533
SYMPTOM: No reception in FM mode.
CURE: Check whether the radio band switch is interrupted.
MODEL: NR2533
SYMPTOM: Cassette lid does not close
CURE: Check whether cassette lid springs are bended; Rebend the springs.
MODEL: NR2533
SYMPTOM: Tape transport function buttons cannot be pushed
CURE: Check whether the auto-stop bracket is bended; Rebend the bracket.
MODEL: NR2533
SYMPTOM: The cassette-lid cannot be closed easily.
CURE: From week 9317 onwards, the shape of the spring has been changed from a straight one to an angled one. REMARKS: For the sets using old springs, it is suggested to push the spring slightly backwards.
MODEL: NR2533
SYMPTOM: Rattling sound from deck while playing.
CURE: White gear wheel mounted wrong.
MODEL: NR5100
SYMPTOM: FM inoperative.
CURE: Check coil T2.
MODEL: NR5100
SYMPTOM: Take-up reel does not wind up. No fast winding mode.
CURE: It might be that the take-up friction axle is bent. Rebend the axle.
MODEL: NR5100
SYMPTOM: Tape transport stops spontaneously (autostop).
CURE: Check whether there is a burr or a piece of glue on the autostop lever. Remove the burr or the glue.
MODEL: NR6100
SYMPTOM: No AC power.
CURE: This fault is caused by the unreliable thermal fuse of the transformer. The primary side of the mains transformer has been interrupted. Service warehouse and production are using now transformers with thermal fuses mounted inside which have been replaced by parts from more reliable quality. Service ordernumber 4822 146 31114. REMARKS: Improved mains transformers have been introduced in production from week 9341 onwards.
MODEL: NR6100
SYMPTOM: Speed of cassette deck is much too low.
CURE: Pressure roller not clicked in well
MODEL: NR7100
SYMPTOM: The tape transport stops spontaneously (autostop).
CURE: Check whether there is a burr on the autostop lever. Remove the burr.
MODEL: NT1200
SYMPTOM: No battery contact when DURACELLbatteries are used.
CURE: A wrong battery contact plate was used.There should be a 0.5mm dome at the centre of the contact plate. For service, it is recommended to modify the plate by making a dome by a nail, or to add a solder point on the plate. REMARKS : Proper contact plate is used in production from week 9516 onwards.
MODEL: NT2200
SYMPTOM: The audio signal at the output is very weak.
CURE: Resolder capacitor C11.
MODEL: NW1020
SYMPTOM: Shaving sound from player.
CURE: Lubricate white wheel on friction
MODEL: NW1020
SYMPTOM: Speed not constant.
CURE: Motor speed keeps changing constantly, motor defective. (4822 361 21614)
MODEL: NW1600
SYMPTOM: No sound at all. Tape transport is o.k.
CURE: Check IC1 (LAG668).
MODEL: NW1600
SYMPTOM: Motor does not turn
CURE: Replace IC1.
MODEL: NW6032
SYMPTOM: Sound level one channel too low.
CURE: Check PCB solder joints e.g. nearby C303.
MODEL: NW6032
SYMPTOM: Motor speed varies
CURE: Check fixation of the motor.
MODEL: NW6032
SYMPTOM: Play knob does not lock.
CURE: It might be that the play bracket is bent. Rebend the bracket.
MODEL: NW6032
SYMPTOM: Tape deck part is inoperative.
CURE: It might be that the upper belt is loose in the set.
MODEL: Portables
SYMPTOM: Accu problems
CURE: Accu problems - Customer complaint ACCU becomes empty too fast. One reason for these complaints are soiled or corrosive contacts of the battery springs and/or contact plates of the accus. An increasing transfer resistance and voltage loss of up to 0,2V (and more) are the result. The built in low battery detection will switch off the set, although the capacity of the accu (batteries) is sufficient for further operation. In case of repair please clean the contacts. Improvements of the battery springs (e.g. usage of non-corrosive materials) are in investigation.
MODEL: RC1040
SYMPTOM: The radio alarm is inoperative, the buzzer is OK
CURE: Check/replace diode D6006.
MODEL: RC1040
SYMPTOM: The minutes cannot be controlled.
CURE: Check track to the wire contact of the minute switch.
MODEL: RC3040
SYMPTOM: No alarm time adjustment possible.
CURE: Check soldering of wire 3 of control panel.
MODEL: RC3040
SYMPTOM: Motor of the cassette part is continuously running.
CURE: Resistor R104 short circuited with R115. Rebend resistors.
MODEL: RC3040
SYMPTOM: The sound of the set is sometimes interrupted.
CURE: Check/replace capacitor C40.
MODEL: RC3210
SYMPTOM: Radio part inoperative.
CURE: Check whether radio cable is damaged by a mounting screw.
MODEL: RC3210
SYMPTOM: Sometimes the radio unintentionally switches on.
CURE: Check C54 for internal resistance
MODEL: RC3210
SYMPTOM: Sometimes no sound.
CURE: Check soldering quality of speaker wire on the PCB.
MODEL: RC3210
SYMPTOM: Volume continuously at maximum level.
CURE: Check earth-contact in volume potmeter for interruption.
MODEL: RC3210
SYMPTOM: In the off position still a weak sound is audible.
CURE: Replace Capacitor C54, value 22nF, by a better quality ceramic capacitor (i.e. 4822 126 12147).
MODEL: RC3210
SYMPTOM: In off position, ticking sound audible from the speaker.
CURE: Check C54.
MODEL: RC3210
SYMPTOM: Some segments of the display are inoperative.
CURE: Check clock IC3.
MODEL: RC3210
SYMPTOM: Some functions are inoperative: time/radio on/alarm.
CURE: Check IC3.
MODEL: RC3210
SYMPTOM: Some segments of the display are inoperative.
CURE: Check IC3.
MODEL: RC3210
SYMPTOM: Some segments of the display are inoperative.
CURE: Replace display driver IC (TMS3459).
MODEL: RC3210
SYMPTOM: Radio and clock inoperative. Alarm 1-2 and : points lights up.
CURE: Check clock IC3.
MODEL: RD1011
SYMPTOM: Set skips tracks, buttons OK
CURE: Check focus and tracking adjustment. (readjusted with SFR5/3).
MODEL: RD1011
SYMPTOM: Does not start-up. Only focus operation.
CURE: Check RCD (4822 691 20792).
MODEL: RD1011
SYMPTOM: Skips tracks.
CURE: Check radial track operation. Replace RCD (4822 691 20792).
MODEL: RD1011
SYMPTOM: At high volume, left channel interrupts.
CURE: Volume potmeter VR1 defective. Replace VR1 (4822 102 10455).
MODEL: RD1011
SYMPTOM: Skips tracks. No focus operation.
CURE: Check solder connections IC4 (bad soldered).
MODEL: RD1011
SYMPTOM: Right channel inoperative.
CURE: Check track from C74 to IC6.
MODEL: RD1011
SYMPTOM: Skips tracks after some time.
CURE: Check RCD. (4822 691 20792)
MODEL: RD1011
SYMPTOM: No sound of line output right channel.
CURE: Check Q3.
MODEL: RD1011
SYMPTOM: Skips tracks.
CURE: Potentiometer SFR5 interrupted (mechanical defect).
MODEL: RD1011
SYMPTOM: CD makes ticking sound.
CURE: Check free space of pos 14 of RCD (if bent, it may stuck against pos 16).
MODEL: RD1011
SYMPTOM: Player stops after +/- 15 min.
CURE: Check space around flatcable RCD near the sledge.
MODEL: RD1011
SYMPTOM: Totally inoperative. No display operation.
CURE: Check TR11.
MODEL: RD1011
SYMPTOM: Only plays the first three tracks.
CURE: Check whether the flexfoil of the RCD stucks against the laserpen. Remount the flexfoil.
MODEL: RD1011
SYMPTOM: Does not read in well. No focus operation.
CURE: Check connections IC3 (bad soldered).
MODEL: RD1011
SYMPTOM: Skips tracks at first tracks.
CURE: Check sledge movement (mounting of flatcable might be mechanically blocked)
MODEL: RD1011
SYMPTOM: Player does not read discs.
CURE: Check position of pushing rod pos 04.
MODEL: RD1220
SYMPTOM: No FM reception.
CURE: Check solder joints of coil L302.
MODEL: RD2425
SYMPTOM: Does not start up discs.
CURE: Check laser output. If too low, replace RCD-assembly 4822 691 30284.
MODEL: RD2425
SYMPTOM: Correction of electrical partslist
CURE: Correction of electrical partslist Item S204 (push switch) should read 4822 276 13253 instead of 4822 276 13254.
MODEL: RD5050
SYMPTOM: CD skips tracks especially at the end of the CD.
CURE: RCD defective.
MODEL: RD5050
SYMPTOM: Tikking sound from player, sledge does not move inside.
CURE: RCD sledge stuck (4822 361 21565). CD mechanism defective (4822 691 20792).
MODEL: RD5050
SYMPTOM: Set totally inoperative, sometimes OK.
CURE: Check transistor Q6
MODEL: RD5050
SYMPTOM: Power consumption
CURE: Power consumption - At maximum volume 250mA. Normal volume 320mA. Pause 110mA +/- 10%.
MODEL: RD5050
SYMPTOM: Correction of electrical partslist
CURE: Correction of electrical partslist The correct service code should read : J1 Socket-Ext. DC 4822 265 20685.
MODEL: RD6050
SYMPTOM: Intermittent fault of CD. Turntable does not start-up/skips tracks.
CURE: Check the copper pattern of the CD decoder board. A copper track of the CD decoder board might be interrupted. REMARKS : From week 9502 onwards, the decoder board with improved copper pattern lay-out has been used in production.
MODEL: RD6050
SYMPTOM: The recorder part produces a ticking sound.
CURE: A piece of dirt was found on one toothed wheel. Removed.
MODEL: RD6050
SYMPTOM: CD part inoperative and gives indication OPEN.
CURE: Check the CD door switch and the wires to the switch.
MODEL: RD6050
SYMPTOM: Does not start up discs. Gives NO DISC indication.
CURE: Check laser output. If too low, replace RCD-assembly 4822 691 30318.
MODEL: RD6050
SYMPTOM: The CD turns but does not read in.
CURE: Check the radial part (monitor diodes). Replace RCD assembly 4822 691 30318.
MODEL: RD6050
SYMPTOM: Does not start discs and skips tracks.
CURE: Check CD-lid. Replace the CD-lid assembly by a modified type.
MODEL: RD6050
SYMPTOM: CD does start up and stops playing with the message OPEN.
CURE: It might be the door switch does not switch. Replace the door switch (4822 278 90739).
MODEL: RD6050
SYMPTOM: The CD lid does not open smoothly.
CURE: Check the CD door. It might be that one tooth of the toothed wheel is broken. Replace the CD door (4822 444 60943).
MODEL: RD6050
SYMPTOM: Skips tracks at the end of a disc.
CURE: Replace CD-lid by a modified type.
MODEL: RD6050
SYMPTOM: Correction
CURE: Correction In Service Information A94-576 (4822 725 25358), the test points were erroneously not given. Please add on page 23 (circuit diagram) the location of test points as described below: TP1 = junction of RV103 and JP1 TP2 = pin 18 of U101 TP3 = junction of R111 and JP1 TP4 = pin 31 (RF) of U101 TP5 = pin 1 of U101 TP6 = junction of RV104 and JP2
MODEL: RD6050
SYMPTOM: Service Manual update
CURE: Service Manual update - Electrical Parts list: The resonator of IC7, item CF1 (4Mc), is available with service codenumber 4822 242 72527.
MODEL: RD6060
SYMPTOM: No CD function, CD part has no +5V power supply.
CURE: Problem is caused by the heat sink of Q8 which causes a short circuit between the mass side of R6 and the collector of Q8. This fault can be solved by removing the resistor R6 from component side to copper track side. This solution has been applied in production too, as a temporary solution. REMARKS : This sympthom/cure is only valid for sets with production code KY00. In these sets CDM12.1 and concerned Philips ICs have been applied. From week 9537 onwards the printed board has been modified to locate R6 away from the heat sink.
MODEL: RD6060
SYMPTOM: Crackling sound from the right channel in cassette play mode.
CURE: Check/replace IC201 (BA3313L).
MODEL: RD6060
SYMPTOM: The cassette door damper gear (item 14) moves out easily.
CURE: The cassette door (item 2; 4822 443 64542) has been modified by adding a rib to prevent the gear from moving off. REMARKS : New Doors are used in production with sets marked KY02 from week 9604 onwards. Consumer Service stock has been adapted.
MODEL: RD6060
SYMPTOM: Modification
CURE: Modification From September 1995 onwards, with factory code starting from KY0195, new CD Deck Mechanism and Main board are used. More details are published in Service Information A95-572 REMARKS : This publication is followed by Service Information A95-572
MODEL: RD7050
SYMPTOM: Sometimes tape deck does not record.
CURE: Check the record/playback switch.
MODEL: RD7050
SYMPTOM: CD display lights up weak and complete. CD inoperative.
CURE: Check front processor IC501 (LC7081A; 4822 209 32674).
MODEL: RD7050
SYMPTOM: No recording. Record button can only be pushed half way down.
CURE: Check whether the red speaker wire is stuck between the record button and the tape deck.
MODEL: RD7050
SYMPTOM: Eject inoperative.
CURE: It might be that the eject spring for eject bracket is loose.
MODEL: RD7050
SYMPTOM: Tape deck does not record. Erase function inoperative.
CURE: Check recording lever pos.84 (4822 522 10472)
MODEL: RD7050
SYMPTOM: Codenumber information
CURE: Codenumber information The CD cushion (4822 466 93447) is replaced by the following two codenumbers : 4822 466 93498Cushion (hard) 4822 466 93499Cushion (soft) The two cushions near the motors are harder.
MODEL: RD7050
SYMPTOM: Modification
CURE: Modification From week 9510 onwards, a new CD chassis (decoder board and control board) is used because the old CD chassis is no longer supplied. The copper track of the CD board has been thickened to improve solder quality. At the same time the power amplifier IC (IC7) is changed from LA4597 to TA8238K Service information A95-555 (4822 725 25386) is published to introduce new circuit diagram, Printed Circuit Board layout diagram, alignment and partslist. REMARKS : Modified sets can be recognized by changed factory code: KZ02 (serial number KZ029510xxxxx). This publication will be followed by Service Information A95-555.
MODEL: RD7050
SYMPTOM: Codenumber information
CURE: Codenumber information The Handle Bracket Left (4822 498 10501) is no longer available. We suggest to use Handle Bracket Right (pos.36; 4822 498 10502) as a substitute.The stopper end has to be cut. REMARKS : See also service newsletter issue PA98.05.
MODEL: RD7050
SYMPTOM: Service Manual, Mechanical partslist
CURE: Service Manual, Mechanical partslist: - The CD lens cover bracket (item 75 in exploded view diagram on page 18) is now available via service code 4822 402 10201.
MODEL: RD7060
SYMPTOM: Error in display after starting the CD player.
CURE: Check R107 on CD board.
MODEL: RD7060
SYMPTOM: Using CD player NO in display.
CURE: Check C71 (100pF) on CD board.
MODEL: RD7060
SYMPTOM: CD player inoperative. Error in display.
CURE: Disc is rotating for a short time. Speed istoo high. Replace IC45 (SAA7345G; 4822 209 33339)
MODEL: RD7060
SYMPTOM: Service Manual, Mechanical partslist
CURE: Service Manual, Mechanical partslist The Cassette Door is assembled of two parts : Item 4Cassette Door Assy (R) : 4822 256 10318Cassette Door Holder (R) 4822 443 64604Cassette Door Cover (R) Item 5Cassette Door Assy (L) : 4822 256 10317Cassette Door Holder (L) 4822 443 64603Cassette Door Cover (L)
MODEL: RD7060
SYMPTOM: Modification
CURE: Modification From September 1995 onwards, with factory code starting from KY0195, new CD Main board and CD Deck Mechanism are used. More details are published in Service Information A95-570 REMARKS : This publication is followed by Service Information A95-570
MODEL: RD7060
SYMPTOM: Service Manual, Mechanical partslist
CURE: Service Manual, Mechanical partslist: - The CD lens cover bracket (item 115 in exploded view diagram on page 15-3) is now available via service code 4822 402 10201.
MODEL: RP420
SYMPTOM: How to select TXT funtions on RP420
CURE: Some older TV remote controls have a key for TXT page memories, indicated on the knob with 4 small lines and a right pointing arrow. This function is not direct available on the RP420 but can be programmed ont he A,B,C or D key with code 030. Also the TXT functions memory in/out can be programmed in the A,B,C and D area for easier acces under 028 and 029. Read the RP420 instructions how to program and operate.
MODEL: RR1325
SYMPTOM: Headphone plug does not disconnect speaker circuit.
CURE: Switch in headphone connector is defect.
MODEL: RR1325
SYMPTOM: Set stops after some time.
CURE: Cassette lid does not close well. Cassette spring in cassette lid is bended. Rebend or replace the cassette spring.
MODEL: RR5010
SYMPTOM: No or bad FM reception.
CURE: Check soldering joints of L3.
MODEL: RR5010
SYMPTOM: No tape transport.
CURE: Check SW3.
MODEL: RR5010
SYMPTOM: No sound from cassette part. Radio O.K.
CURE: Shortcircuit between R26 and a pin of C23.
MODEL: RR5010
SYMPTOM: The tapedeck motor keeps on turning when is switched to tape.
CURE: Check source selector switch SW3 for internal shortcircuit.
MODEL: RR6010
SYMPTOM: Totally inoperative.
CURE: Check mainstransformer.
MODEL: RR6010
SYMPTOM: No AC power.
CURE: This fault is caused by the unreliable thermal fuse of the transformer. The primary side of the mains transformer has been interrupted. Service warehouse and production are using now transformers with thermal fuses mounted inside which have been replaced by parts from more reliable quality. Service ordernumber 4822 146 31114. REMARKS: Improved mains transformers have been introduced in production from week 9341 onwards.
MODEL: RR6010
SYMPTOM: FM inoperative.
CURE: Check soldering joints near the tuning capacitor.
MODEL: RR6010
SYMPTOM: One channel no sound.
CURE: Check the headphone socket switch.
MODEL: RR6010
SYMPTOM: Cassette deck switches often off after pressing play
CURE: Sealing wax of head screw spread over auto stop bracket.
MODEL: RR6010
SYMPTOM: Very bad FM receivement.
CURE: Check transistor Q101
MODEL: RR6010
SYMPTOM: Deck button does not lock.
CURE: Check the locking lever. It might be that the lever is bent.
MODEL: RR6010
SYMPTOM: No tape transport. The take-up reel does not turn.
CURE: It might be that the take-up belt is loose.
MODEL: RT2020
SYMPTOM: No FM reception.
CURE: Check capacitor VC1.
MODEL: RT2020
SYMPTOM: FM inoperative, rest OK.
CURE: Check connection of wire of L2
MODEL: RT2020
SYMPTOM: Set sometimes does not give any sound.
CURE: Check soldering of capacitor C20.
MODEL: RT2020
SYMPTOM: Radio always gives a too low sound level
CURE: Check capacitor C26
MODEL: RW3060
SYMPTOM: No FM reception.
CURE: Check soldering of coil L3.
MODEL: RW4020
SYMPTOM: No tape transport.
CURE: Check motor.
MODEL: RW4020
SYMPTOM: One channel no sound.
CURE: Check soldering quality of C104.
MODEL: RW4020
SYMPTOM: Right channel no sound.
CURE: Check soldering quality of IC LAG665.
MODEL: RW4020
SYMPTOM: (Auto) stop function defective. Play button does not release.
CURE: Check spring from the play bracket.
MODEL: RW4020
SYMPTOM: Tape speed too low.
CURE: Drive belt might be loose from motorpulley.
MODEL: RW6202
SYMPTOM: Interrupted sound reproduction.
CURE: Check solder joints of battery spring.
MODEL: RW6203
SYMPTOM: The play bracket does not lock.
CURE: Rebend the play bracket.
MODEL: RW6203
SYMPTOM: Crackling sound. Motor noise audible in audio signal.
CURE: Check DC motor (4822 361 21613).
MODEL: RW6203
SYMPTOM: Play knob inoperative
CURE: Check play-spring.
MODEL: RW6203
SYMPTOM: Play knob inoperative
CURE: Check the play bracket.