PHILIPS TV Repair: Common Faults and Solutions.


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PHILIPS Repair Guide: Common Issues and Fixes

Brand Model Fault Detailed Problem Solution By
PHILIPS14PT3131/4131/3331/4331
Without horizontal synchronization.- check the smd 3492 resistor, the lack of soldering may cause interference in the image.
PHILIPS14PT3131/4131/3331/4331
No focus when turning on.- remove 47µf 2494 capacitor.
PHILIPS14PT3131/4131/3331/4331
Noise from the standby speaker.- remove 1nf capacitor position 2585. if the product's power supply is 220v, the fet 7521 must be checked for 14" models fet transistor fqpf6n80 (9322 187 17687) and for 20 and 21" models fet transistor fqpf7n80 (9322 174 27687 ).
PHILIPS14PT3131/4131/3331/4331
Noise from the standby speaker.- add the 10nf capacitor code 2238 586 15636 in position 2901 (see service information ts05-005).
PHILIPS14PT3131/4131/3331/4331
Mechanical noise in stand by.- check resistor 3520 (1k2) and capacitors 2528 (22µf, 50v), 2520 (10nf), 2452 (22nf) this capacitor was not mounted on the first models.
PHILIPS14PT3131/4131/3331/4331
Flickering frame - with/without "bloom" expansion.- check resitor 3454 open.
PHILIPS14PT3131/4131/3331/4331
Flickering frame - with/without "bloom" expansion.- check diode 6451 altered.
PHILIPS14PT3131/4131/3331/4331
Flickering frame - with/without "bloom" expansion.- check possible changes in the 1k 3525 smd resistor connected to pin 9 of the ci 7250.
PHILIPS14PT3131/4131/3331/4331
Has no colors- check for possible leakage in the 6318 diode (8v2 zener diode), generally the screen has excessive contrast and may turn off intermittently.
PHILIPS14PT3131/4131/3331/4331
Does not exit service mode or enter without being prompted.- check for possible leakage in capacitors 2461 or 2462.
PHILIPS14PT3131/4131/3331/4331
Does not work on 220v.- check possible alteration of capacitor 2528.
PHILIPS14PT3131/4131/3331/4331
Does not work (only screen with drizzle).- check the possibility of fitting the speaker connector 0246 in the position of the compair connector 0217, the product is in av and when entering service mode it indicates 000 for all option bytes.
PHILIPS14PT3131/4131/3331/4331
Does not work (it remains switched off).- measure voltage 13.8v on pin 2 of ci 7520, if it is lower, check possible changes in resistors 3506, 3507 and diode 6505.
PHILIPS14PT3131/4131/3331/4331
Does not work (it remains switched off).- check welding of the 6642 diode.
PHILIPS14PT3131/4131/3331/4331
Does not work (it remains switched off).- check diode 6446.
PHILIPS14PT3131/4131/3331/4331
Does not work (it remains switched off).- check possible changes to resistors 3443 or 3444.
PHILIPS14PT3131/4131/3331/4331
Does not work (it remains switched off).- check possible changes to 3528.
PHILIPS14PT3131/4131/3331/4331
Does not work (it remains switched off).- check possible changes to the 7421 - see item 5.7 repair tips in the service manual pg. 20.
PHILIPS14PT3131/4131/3331/4331
Does not work (it remains switched off).- check possible changes to 7515.
PHILIPS14PT3131/4131/3331/4331
Does not work (it remains switched off).- check capacitor 2528.