Philips Repair Tips

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Make	Model	Symptom	Problem
PHILIPS	FWM779/ FWM589/ FWM57	Does not read - does not recognize the disk - no disk	Does not recognize the disk
PHILIPS	FWM779/ FWM589/ FWM57	Indicates [no disc], [no], [insere disc].	Check capacitors 2861 and 2866.
PHILIPS	FWM779/ FWM589/ FWM57	Display indica: reading.	Check the capacitors: 2873, 2874, 2870, 2871, 2872, 2875.
PHILIPS	FWM779/ FWM589/ FWM57	Turns off immediately after turning on.	Measure voltage at the emitters of the transistors (7102, 7107, 7150 and 7152), if there is low/no voltage in some of them, check whether one of the following resistors (3128, 3126, 3164 and 3170) is open, find any open check possible leak in some of these capacitors (2112, 2113, 2156 and 2157).
PHILIPS	FWM779/ FWM589/ FWM57	Turn off inter. or protect (rew 3 for vcr).	Check possible changes in the protection circuit transistors: 7205, 7206 and 7212.
PHILIPS	FWM779/ FWM589/ FWM57	Damage IC or TS semiconductor	It damages the FET after the change, before connecting the amplifier panel, the power supply capacitors must be discharged.
PHILIPS	FWM779/ FWM589/ 57	Heating transistor	If the fet transistors are heating up too much: 7112, 7117, 7162, 7165; check diodes with possible changes: 6107, 6110, 6155 and 6160.
PHILIPS	20PT4331 /78R - CHASSIS L03	Vertical closing intermittent.	- check capacitor 2460 (see service information ts04-016).- check capacitor 2461 (1nf).- check service information ts04-016.- check capacitor 2464.
PHILIPS	20PT4331 /78R - CHASSIS L03	Vertical with little amplitude	- check capacitor 2460 (68nf 100v), provisionally the capacitor will be damaged by heating, in this case the stations are being advised to replace the capacitor with (68nf 250v) code 2222 479 47207.- check transistor 7461, if in doubt replace.- check service information ts04-016.
PHILIPS	20PT4331 /78R - CHASSIS L03	Voltages below the specified (vo, +b,..)	- g2 does not work, check 5441 tsh. - check possible change in the 1k 3525 smd resistor connected to pin 9 of the ci 7250.
PHILIPS	20PT4331 /78R - CHASSIS L03	Voltages below the specified (vo, +b,..)	- check possible changes in the 1k 3525 smd resistor connected to pin 9 of the ci 7250. - check possible changes in the 3453 resistor.
PHILIPS	20PT4331 /78R - CHASSIS L03	Voltage varying.	- check possible changes in the 1k 3525 smd resistor connected to pin 9 of the ci 7250. - check possible changes in the transistor 7523 or 7515.
PHILIPS	20PT4331 /78R - CHASSIS L03	Dark screen - no image or active progressive	- check the possibility of altered/open resistors 3443/3444. - check ci 7641, in this case it should be normal.
PHILIPS	20PT4331 /78R - CHASSIS L03	Intermittent sound (crashes, hiccups) or no sound.	- check 4.7nf smd capacitor position 2201, and it is common to have a failure on one side. - check smd capacitor 2202 pin 32 and 33 of the uoc.
PHILIPS	20PT4331 /78R - CHASSIS L03	Low or no sound in av.	- check 7841.
PHILIPS	20PT4331 /78R - CHASSIS L03	Sound increases by itself	- check the version of the ci 7200 - tda9370ps/n3/a/1722v2.2, if the mask is from another version below 2.2, the new ci must be requested using code 935278551112 together with the recorded eeprom pos. 7641 by code 480620987908 containing already updated addresses 3ed = ff and 3f5 = ff.
PHILIPS	20PT4331 /78R - CHASSIS L03	No tune = channel/station just noise/mute.	- check possible alteration of resistor 3349 (27k). see item 5.7 repair tips in the service manual pg. 20.
PHILIPS	20PT4331 /78R - CHASSIS L03	Without horizontal synchronization.	- check the smd 3492 resistor, the lack of soldering may cause interference in the image.
PHILIPS	20PT4331 /78R - CHASSIS L03	No focus when turning on.	- remove 47µf 2494 capacitor.
PHILIPS	20PT4331 /78R - CHASSIS L03	Noise from the standby speaker.	- add the 10nf capacitor code 2238 586 15636 in position 2901 (see service information ts05-005). fet transistor fqpf6n80 (9322 187 17687) and for model 20 and 21"" fet transistor fqpf7n80 (9322 174 27687).