Philips Repair Tips
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Results: 14233
Results: 14233
| Make | Model | Symptom | Problem | Solution | By |
|---|---|---|---|---|---|
| PHILIPS |
GR2.2
|
Bad synchronisation. sometimes black picture. | Pulses on pin 12 of ic7470 (tda2579) is too low (3vpp) because resistor r3539 is defective. 90° crt 430k (4822 053 20434 ) others 680k (4822 053 20684) | ||
| PHILIPS |
GR2.2
|
Bad sound. | Delete 3237 in black matrix mono sets. | ||
| PHILIPS |
GR2.2
|
Bad sensitivity on remote control signals | Replace pos.nr 1003 by 4822 130 83821 (improved infra-red receiver) | ||
| PHILIPS |
GR2.2
|
Bad focus or picture shuts off with flyback lines in bl-s tube | Create artificial flash-over in the crt, by short circuiting vg2 and focus and connect them for a short moment to aquadag. | ||
| PHILIPS |
GR2.2
|
Always comes on in stby and can only be turned on | Child lock in special functions menu is turned on | ||
| PHILIPS |
GR2.2
|
After some time power-supply shuts off. | Check diode d6612 (1n4148) after warming up. protection pin 8 ic7600 is about 2v, diode d6666 is leaking. check d6666 (4822 130 80887) (uz-c36 in case of 25" and 28") (4822 130 81141) (uz-c43 in case of 21") | ||
| PHILIPS |
GR2.2
|
Adjustment of white balance is difficult in black matrix crt | Replace position number 3382, (3k9) on crt panel by 4k3 (4822 051 10432) remarks : typenumbers with crt-panel on crts a59eak220x13, a59eak71x03, a66eak220x13 | ||
| PHILIPS |
GR2.2
|
Adaptation in production | Adaptation in production replace bzt03-c16 on pos. nr. 6611 on main panel by bzv85-c16 | ||
| PHILIPS |
GR2.2
|
"s" in screen, cannot go from service mode. | Diode 6705 (bzv55-f5v1; 4822 130 80905) leaks. | ||
| PHILIPS |
GR2.1AB
|
Thump from spkr then trips | Dis'd tda2613 audio o/p chip brought back pic but replacement along with r3241 8r2 failed to cure; soft start cct faulty - t7247 bc848 s/c | ||
| PHILIPS |
GR2.1AB
|
Raster present with green led flashing | Ht was low when connected to lop but ok on bulb - audio o/p chip was s/c | ||
| PHILIPS |
GR2.1AB
|
Dead | C2545 1500pf 2kv s/c connected to bu508af loptr | ||
| PHILIPS |
GR2.1AA
|
Eht but no sound or pic and a flashing led ( when | Tda2579b producing wrong s.castle pulses | ||
| PHILIPS |
GR2.1AA
|
Dead with power supp. running | Check ic7880 pca84c81ap/098 ( unplug text pcb to prove ) | ||
| PHILIPS |
GR2.1, 2.2 AA
|
Prot disable | Dis pin 8 ic 7600 | ||
| PHILIPS |
GR2.1, 2.2 AA
|
No picture or sound | Fault in prot circuit , can be zener diode 6666 | ||
| PHILIPS |
GR2.1 25ST1761
|
Repeatedly tripping | Psu works ok on dummy load; 1534 315ma wickman fuse (o/c), r3545 100Ω (o/c), c2559 100uf 25v (leaking electrolyte), r3585 15Ω (o/c) | ||
| PHILIPS |
GR2.1 25ST1750/05B
|
Width excessive with no control | R3585 15r near loptx o/c | ||
| PHILIPS |
GR2.1 25ST1724
|
Txt absent producing f7 on screen when selected | Ic7800 micro on txt pcb =- type pcf84c81/a89 - ensure correct type fitted | ||
| PHILIPS |
GR2.1
|
You cannot change all options in the service mode at the same time. | If you save all changed options by selecting stand by it can happen in sets with mr5 software that some values are not stored. to avoid this, store each option group separately. |