Philips Repair Tips

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Make	Model	Symptom	Problem
PHILIPS	29PT5642 /78 - CHASSIS L04	List the option swaps	- ob1 = 0 (tuner alps), 128 (tuner philips)- ob2 = 160- ob3 = 128- ob4 = 164- ob5 = 250- ob6 = 42- ob7 = 0
PHILIPS	29PT5642 /78 - CHASSIS L04	RGB return lines (retraction).	- add a 47nf/250 capacitor in position 2490 (code 2020 557 90733).
PHILIPS	29PT5642 /78 - CHASSIS L04	Interference in the image	- check 5408 and 9352.
PHILIPS	29PT5642 /78 - CHASSIS L04	Turns off immediately after turning on.	- check capacitor 2264 on the blkin line, it may present a retrace before switching off.- check service information ts04-024.- check possible alteration of diode 6533 or 6534.
PHILIPS	29PT5642 /78 - CHASSIS L04	Turns off immediately after turning on.	- check relay position 1503 and welding.- check resistor 3509 and transistor 7541.- check possible open track near connector 1504.- check possible alteration of capacitor 2564.
PHILIPS	29PT5642 /78 - CHASSIS L04	Turns off when changing channels or tuning	- check 3.3v regulator (l78l33acz) position 7603.
PHILIPS	29PT5642 /78 - CHASSIS L04	Damage IC or TS semiconductor	- damages 7405, check possible leak in driver transformer 5402 or change in capacitor 2410 or 2489.
PHILIPS	29PT5642 /78 - CHASSIS L04	With vertical bar(s) or stripes	- image shifted to the right with a dark bar on the left side, check possible changes in capacitor 2486 (27pf) code 2252 508 08255, to prevent the capacitor from failing again change the value of resistor 3430 from 120k to 220k code 4806 116 57342.
PHILIPS	29PT5642 /78 - CHASSIS L04	Loading initial (default) data from memory.	1- after changing the memory, with the device turned off, close jumpers 9228 and 9252. 2- turn on the device, the default options should appear ( 255 255 ...); 3- press and hold the [ch] keys on the local keyboard -] and [vol-], until the device turns off,4 - then press ch+ (keep it pressed until the device turns on), the message "loaded" should appear. If it does not occur the first time, repeat steps 3 and 4.5 - enter service mode using the sequence 062596 osd and complete the model adjustments (option byte and alignments). This same procedure can be performed if data corruption occurs.
PHILIPS	29PT5642 /78 - CHASSIS L04	Poor brightness (little shine).	- check possible leak in capacitor 2453.
PHILIPS	29PT4640 /78 - CHASSIS L01.1L AC	Vertical with little amplitude	- enter service mode and check geometric alignment.
PHILIPS	29PT4640 /78 - CHASSIS L01.1L AC	Flutters at the top.	- check altered smd capacitors 2252 and 2253.
PHILIPS	29PT4640 /78 - CHASSIS L01.1L AC	Intermittent sound (crashes, hiccups) or no sound.	- check possible alteration of capacitor 2619.
PHILIPS	29PT4640 /78 - CHASSIS L01.1L AC	No h/v sync.	Same information valid for chassis l03 contained in service information ts03-016. - possible leak in capacitor 2241(1n5). see table 1 of information ts03-016.- possible alteration of capacitor 2242 (1µf). see table 1 of information ts03-016.
PHILIPS	29PT4640 /78 - CHASSIS L01.1L AC	Frame varies when the volume increases.	- check altered 6541 diode. - possibility of lack of soldering on 3525 3527 or altered resistors.
PHILIPS	29PT4640 /78 - CHASSIS L01.1L AC	Flickering frame - with/without "bloom" expansion.	- check smd diodes 6453 and 6445.
PHILIPS	29PT4640 /78 - CHASSIS L01.1L AC	List the option swaps	- ob1 = 0 (tuner alps), 128 tuner philips- ob2 = 16- ob3 = 64- ob4 = 226- ob5 = 100- ob6 = 0- ob7 = 0obs. for model 29pt4635/78-radius 1.3 the same ob above, for radius 1.7 the ob3 must be 192.
PHILIPS	29PT4640 /78 - CHASSIS L01.1L AC	Turns off immediately after turning on.	- measure the voltage vbat (130v), if not available, then disable the protection circuit (short between base and emitter on transistor 7573) and check the deflection circuit.
PHILIPS	29PT4640 /78 - CHASSIS L01.1L AC	Turn off inter. or protect (rew 3 for vcr).	- check audio ci 7901.- check diode 6449.- check capacitor 2455 (47µf) in the horizontal "driver" circuit.
PHILIPS	20PT428A L01.2L AL	Vertical closing intermittent.	- check smd capacitors 1nf 50v position 2252 and 2253. - check possible changes in one of the smd capacitors 2475 and 2477 (470pf).