PHILIPS TV Repair: Common Faults and Solutions.

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PHILIPS Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
PHILIPS	FL4.27	Blank picture. osd not synchronised and too large, no txt.	Check/replace memory ic 7900 (st24c08cb1; 4822 209 32283).
PHILIPS	FL4.27	Beam current limiter	Beam current limiter only for 28" or higher to speed up the beam current limiter, position 6478 on the small signal panel has been changed from a llz-c27 into a llz-c24 (4822 130 81509). remarks : this change has been intro
PHILIPS	FL4.27	Bad synchronization with external signals	Delete position 3115 on the eco 100hz box. remarks : introduced in production in week 9415.
PHILIPS	FL4.27	Bad picture. picture scrolls. no rc reaction.	+5v was 4,1v instead of 5,1v. replace ic7551 (lm358n; 4822 209 70672)
PHILIPS	FL4.27	Bad pict. no menu. dark bars over pict. red pict. in dig.scan mode.	+5v was 4,3v instead of 5,1v. ic7551 (lm358n 4822 209 70672) defective. ic7209 (saa7158 4822 209 31059) bendic defective.
PHILIPS	FL4.27	Bad focus or focus varies in a new set or after crt replacement	Possible solution: short circuit the focus and the g2 pins of the picture tube with the aquadag coating. switch the set on for approximately 5 seconds. after this return the set to its original condition. check if the focus adjusted normally. if not repla
PHILIPS	FL4.27	Antenna input: no sound. external input: sound o.k.	Check whether crystal 1602 (stereo decoder) 10mhz oscillates. if not replace x1602 (4822 242 80276).
PHILIPS	FL4.27	After 10 minutes picture becomes red from right side	C2395 on the lsp poorly soldered.
PHILIPS	FL4.27	22av1440 is switched on by external vcr when fl1 is switched off	Connect 4 diodes of type bat 85 to inputs of ic7630 on ssp. 1 diode between pin 3/ic7630 and +5v, cathode to +5v. 1 diode between pin 5/ic7630 and +5v, cathode to +5v. 1 diode between pin 3/ic7630 and -8v, anode to -8v. 1 diode between pin 5/ic7630 and -8
PHILIPS	FL4.27	"nvm write protection enabled" message on screen.	Startup problem or 'nvm write protection enabled' message on screen after replacement of nvm (st24c08cb1; 4822 209 32283) with a st24c08cb6 (4822 209 33113). use as replacement the st24c08 1 (9311 021 36682).
PHILIPS	FL4.26	Supply switch-off sometimes	Check the +5 stand-by. this voltage has to be 5.5v and may not vary. when the voltage drops below 5.2v the set switches-off. cure: check leakage of d6266 (bzx79/f6v8; 4822 130 34278)
PHILIPS	FL4.26	Supply +5v too low, black horizontal bar in picture. bad sync.	Check/replace ic7551 (lm358n; 4822 209 70672)
PHILIPS	FL4.26	Sound shuts off and osd in picture.	Voltage on pin 4 tda8417 was 3.5v tt instead of >4.5v tt. replace x-tal 10 mhz (4822 242 80276).
PHILIPS	FL4.26	Sometimes vibration in vertical direction.	Replace c2410 (150nf 5%; 4822 121 41854) on lsp.
PHILIPS	FL4.26	Sometimes in protection, or hor. width varies	Check or resolder on lsp the pins of e/w bridge coil 5521.
PHILIPS	FL4.26	Shuts off and on again on pr.nr. 1 after 3 hours.	D6272 (bzx55b5v6) interruption when it becomes hot.
PHILIPS	FL4.26	Set totally inoperative, no leds on. supply hums.	R3252 220 kΩ (start-up micro-sops) defective (4822 116 52258).
PHILIPS	FL4.26	Set inoperative only red or green led. supply was 141v but no eht.	Line drive puls for t7506 (2sc4288a) too low. l5503 defective (line drive coil; 4822 157 63252)
PHILIPS	FL4.26	Set can only be operated with remote control	Check whether "child lock" is disabled. to check this, see "frequently asked questions", "how to disable child lock".
PHILIPS	FL4.26	Picture twists from top	Voltage of pin 8-ic7450 (tda3654q) on the lsp has raised to ca. 20 v. check diode 6451 (bzx79/c3v6; 5322 130 34834 or bzx79/c10; 4822 130 61219)