Philips Repair Tips

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Make	Model	Symptom	Problem
PHILIPS	29PT5642 /78 - CHASSIS L04	Vertical with little amplitude	- check capacitors 2245 and 2248.
PHILIPS	29PT5642 /78 - CHASSIS L04	Goes to stand by after some time.	- dark band appears at the bottom after some time of switching on and then switching off, check possible leak in capacitor 2625, see details of the diagram in section a5 features & connections. - check service information ts04-024 and ts04-027.
PHILIPS	29PT5642 /78 - CHASSIS L04	Dark screen - no image or active progressive	- check possible changes to smd resistors 3475 and 3467.- check possible changes to smd resistors 3351, 445 and 3457.- check transistor 7405.- check socket 1254.- check coil 5352.
PHILIPS	29PT5642 /78 - CHASSIS L04	Dark shadows covering the screen.	- check possible cold solders on the cables for the trc panel. - check possible changes to capacitors 2406, 2451 and resistor 3412.
PHILIPS	29PT5642 /78 - CHASSIS L04	Sound goes down on its own, on TV it switches stereo/mono.	- enter service mode and change the following memory addresses: 162 from 3 to 5163 from 9 to 11, if this does not resolve the change in the above data, change address 168 from 10 to 12 or 13.
PHILIPS	29PT5642 /78 - CHASSIS L04	Sem som em lii (sap)	- enter service mode and change the following memory addresses: 164 from 3 to 2165 from 9 to 10.
PHILIPS	29PT5642 /78 - CHASSIS L04	Noise in the Audio due to signal deviation from the relay.	- apply software version l4lls1-aug25. The update file is available on the page (www.servicephilips.com.br/downloadsupdatesoft.asp). important!!! after the software update, enter service mode using the sequence 062596 osd, check if the new "software" l4lls1-aug25 is already loaded, enter the nvm editor function select the memory address 1021(dec) and change from ff to 01.
PHILIPS	29PT5642 /78 - CHASSIS L04	Clock running late	- this occurs when using a software version below 1.4, the current version is 1.9d. In this case, it is necessary to correct the software version using the IIC interface (consult support).
PHILIPS	29PT5642 /78 - CHASSIS L04	Does not turn on via remote control.	- check possible leak in capacitor 2213.
PHILIPS	29PT5642 /78 - CHASSIS L04	Does not work (it remains switched off).	- check capacitor 2454, 2460 and 2621.- check transistor 7405.- check possible change in capacitor 2512.- check capacitor 2564.- check ci 7511 (tea1620).- check position lack of solder 5531.- check possible change in capacitor 2532 .- check possible alteration of diode 6533 or 6534.
PHILIPS	29PT5642 /78 - CHASSIS L04	Does not correct east-west	- check whether the resistor 3425 or 3497 is open or altered, if not, check the polarization voltages of the transistors: 7406, 7410, 7411 and 7484.
PHILIPS	29PT5642 /78 - CHASSIS L04	Stand by LED does not light up (device off)	- check flex cable position 1693 and diode 6691.
PHILIPS	29PT5642 /78 - CHASSIS L04	Does not accept remote command	- check possible alteration of resistor 3216 or leak in capacitor 2279.
PHILIPS	29PT5642 /78 - CHASSIS L04	Does not open vertically	- check for possible changes (leakage) in capacitor 2461 (cap cer smd 1nf).
PHILIPS	29PT5642 /78 - CHASSIS L04	Intermittent mute (sound or image).	- if there is an intermittent audio mute and it only comes back after changing the channel, apply "software version 1.9d_l04". The update file is available on the page (www.servicephilips.com.br/downloadsupdatesoft.asp).
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.