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
PHILIPS29PT8422/78
Momentary loss of tune when changing channels.- change the "video blanking" value from 000 to 007 at address (dec) address 0372, this variation from zero to seven provides a change in the time in which the screen remains dark from 1.3 to 1.6 seconds.
PHILIPS29PT8422/78
Does not identify stereo.- the l05 chassis has a routine that only makes the "stereo" signal identical after 90 seconds, if the customer asks about this feature, it can be resolved by executing the following sequence:1) enter service mode;2) enter nvm mode;3 ) change the value present at address add1020(decimal) to 00.
PHILIPS29PT8422/78
List the option swaps- ob1 0 (tuner alps), 128 tuner philips- ob2 40- ob3 136- ob4 4- ob5 254- ob6 42- ob7 0
PHILIPS29PT8422/78
Speaker with vibration.- remove the speaker and check that the damping ring has not been inserted incorrectly, making it possible to correct the positioning.
PHILIPS29PT8422/78
Turns off immediately after turning on.- if there is a white streak when switching off in the center of the screen, check the deflector connector.
PHILIPS29PT4640/78
Vertical with little amplitudeEnter service mode and check vam geometric alignment.
PHILIPS29PT4640/78
Flutters at the top.Check changed smd capacitors 2252 and 2253.
PHILIPS29PT4640/78
Intermittent sound (crashes, hiccups) or no sound.Check possible alteration of capacitor 2619.
PHILIPS29PT4640/78
No h/v sync.Possible alteration of capacitor 2242 (1µf).
PHILIPS29PT4640/78
No h/v sync.Possible leak in capacitor 2241(1n5).Check possible replaces in the 1k 3525 smd resistor connected to pin 9 of the ci 7250.
PHILIPS29PT4640/78
Frame varies when the volume increases.Possibility of missing solder on resistors 3525 3527 or altered.
PHILIPS29PT4640/78
Frame varies when the volume increases.Check diode 6541 altered.
PHILIPS29PT4640/78
"frame twinkling with/without expansion ""bloom""."Check smd diodes 6453 and 6445.
PHILIPS29PT4640/78
Turns off immediately after turning on.Measure the vbat voltage (130v), if not, then disable the protection circuit (short between base
PHILIPS29PT4640/78
Turn off inter. or protect (rew 3 for vcr)."check capacitor 2455 (47µf) not horizontal ""driver"" circuit."
PHILIPS29PT4640/78
Turn off inter. or protect (rew 3 for vcr).Check diode 6449.
PHILIPS29PT4640/78
Turn off inter. or protect (rew 3 for vcr).Check audio ci 7901.
PHILIPS14PT4131/3131-20PT4331/3331 L03.1L AA
Vertical with little amplitudeCheck 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 possible replaces in the 1k 3525 smd resistor connected to pin 9 of the ci 7250.
PHILIPS14PT4131/3131-20PT4331/3331 L03.1L AA
Voltages below the specified (vo, +b,..)Check possible changes in the 1k 3525 smd resistor connected to pin 9 of the ci 7250.
PHILIPS14PT4131/3131-20PT4331/3331 L03.1L AA
Voltages below the specified (vo, +b,..)G2 does not work, check 5441 tsh.$$#