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
Turns off immediately after turning on.- check ci position 5520.
PHILIPS14PT3131/4131/3331/4331
Turns off immediately after turning on.- check for possible lack of soldering on the 3489 resistor.
PHILIPS14PT3131/4131/3331/4331
Turns off immediately after turning on.- check possible alteration of transistor 7491 and 7496 - see item 5.7 repair tips in the service manual pg. 20.
PHILIPS14PT3131/4131/3331/4331
Turns off immediately after turning on.- check possible alteration of the 7540 transistor.
PHILIPS14PT3131/4131/3331/4331
Turns off immediately after turning on.- check possible alteration of capacitor 2542 or diode 6501.
PHILIPS14PT3131/4131/3331/4331
Turns off immediately after turning on.- check possible changes in the 1k 3525 smd resistor connected to pin 9 of the ci 7250.
PHILIPS14PT3131/4131/3331/4331
Turns off immediately after turning on.- check diode 6624 (bas316) and capacitor 2616 (10µf).
PHILIPS14PT3131/4131/3331/4331
Turns off immediately after turning on.- check welding of the 6642 diode.
PHILIPS14PT3131/4131/3331/4331
Turns off immediately after turning on.- check possible changes to resistors 3447, 3449, 3450 and 3472.
PHILIPS14PT3131/4131/3331/4331
Turns off immediately after turning on.- check possible alteration of capacitor 2542 or diode 6501.
PHILIPS14PT3131/4131/3331/4331
Turns off immediately after turning on.- check possible failure in resistor 3475 (10k), frame_out information line.
PHILIPS14PT3131/4131/3331/4331
Turns off immediately after turning on.- check possible changes in the 1k 3525 smd resistor connected to pin 9 of the ci 7250.
PHILIPS14PT3131/4131/3331/4331
Turns off immediately after turning on.- check the possibility of altered resistors 3443/3444, due to the fact that the g2 setting is higher than specified, the protection may act.
PHILIPS14PT3131/4131/3331/4331
Turn off inter. or protect (rew 3 for vcr).- check possible failure in resistor 3475 (10k), frame_out information line.
PHILIPS14PT3131/4131/3331/4331
Turn off inter. or protect (rew 3 for vcr).- check welding of the 6642 diode.
PHILIPS14PT3131/4131/3331/4331
Turn off inter. or protect (rew 3 for vcr).- 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
Protection - error 5", in this case check 7200, 75 41, 7491, 7493, 7496 .Give priority to checking the 3v3 7493 regulator, check for possible leakage in the 6318 diode (8v2 zener diode), generally the screen has excess contrast and may turn off intermittently.
PHILIPS14PT3131/4131/3331/4331
Turns off when changing channels or tuning- this problem may be caused by "por3.3v / 8v
PHILIPS14PT3131/4131/3331/4331
Excessive contrast- 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
Poor contrast- check the possibility of changing the resistor 3318 (220r).