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Philips Repair Tips




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Search: philips
Results: 14208
Make Model Symptom Problem Solution By
PHILIPS 20PT428A L01.2L AL
Vertical with little amplitude - enter service mode and check geometric alignment.
PHILIPS 20PT428A L01.2L AL
Voltages above specified - mainsupply ]95v, check capacitors 2540 (10nf), 2563 (1n5), resistor 3543 (82k) and diode 6566 (bas16).
PHILIPS 20PT428A L01.2L AL
Voltages below the specified (vo, +b,..) - go with +95v low, check zener diode 6540 (bzx79 b6v2).
PHILIPS 20PT428A L01.2L AL
Dark screen - no image or active progressive - check transistor 7409 (bc857b) for leakage. - check capacitor 2233 (820pf).
PHILIPS 20PT428A L01.2L AL
Intermittent sound (crashes, hiccups) or no sound. - check possible alteration of capacitor 2619.
PHILIPS 20PT428A L01.2L AL
Intermittent sound (crashes, hiccups) or no sound. - check capacitor 2235 (1nf).
PHILIPS 20PT428A L01.2L AL
Noisy or frying sound - check, add, replace capacitor 2950 (390pf). - check capacitor 2235 (1nf). - replace deemphasis filter components: 2228 330pf, 2227 1n2 and 3232 3k9.
PHILIPS 20PT428A L01.2L AL
So fica em stand by (power off). - verificar resistor 3404 (resistor 6, 8r 0, 33w), capacitor 2405 (1nf, 50v) e diodo 6406 (bav70).
PHILIPS 20PT428A L01.2L AL
No sound. (with or without image for TV, VCR). - enter service mode, clear error and check option byte table.
PHILIPS 20PT428A L01.2L AL
No vertical sync (vert5). - tentar desabilitar o ""forced slicing level for vertical sync."" fsl 0 slincing level dependent on noise detector fsl 1 fixed slicing level of 70%.
PHILIPS 20PT428A L01.2L AL
Without horizontal synchronization. - check possible changes in one of the capacitors 2241 (4n7) and 2242 (1uf).
PHILIPS 20PT428A L01.2L AL
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 20PT428A L01.2L AL
Horizontal dark streaks. - check capacitors 2252 and 2253.
PHILIPS 20PT428A L01.2L AL
Does not work (it remains switched off). - check if there is a short in the power supply line, disconnect 5602, 5603 and 5604, if it rises above 3.3v check regulator 7560, if the voltage is at 3.3v the micro 7200 may have a short. - check for possible leakage in diode 6495 (byd33d). - check capacitor 2520 (100nf). - check transformer 5520, and diode 6565 (bav70).
PHILIPS 20PT428A L01.2L AL
Does not accept remote command - check possible leak in capacitor 2602 (100pf).
PHILIPS 20PT428A L01.2L AL
Hotel mode - no cr 319753 mute.
PHILIPS 20PT428A L01.2L AL
List the option swaps - ob1 = 0 (tuner alps), 128 (tuner philips)- ob2 = 215- ob3 = 65- ob4 = 64- ob5 = 82- ob6 = 81- ob7 = 3
PHILIPS 20PT428A L01.2L AL
RGB return lines (retraction). - possible leak in capacitor 2233, measure 5.6v on pin 55 of the uoc.
PHILIPS 20PT428A L01.2L AL
Jagged image (see train1). - check capacitor 2407 and diode 6404.
PHILIPS 20PT428A L01.2L AL
Turns off immediately after turning on. - check possible leak in capacitor 2619 (1uf). - check for possible changes in the zener diode 6241 (6v8) or leaks in the transistor 7241 (bc857b). - check resistor 3547 0.22r changed. - check diode 6405 (-15v) open. - check diode 6406.