Philips Repair Tips
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Results: 14209
Results: 14209
| Make | Model | Symptom | Problem | Solution | By |
|---|---|---|---|---|---|
| PHILIPS |
GR1AX
|
No picture. osd ok | Voltage pin 10 ic7020 too low. check c2045 (22nf; 4822 122 30103). | ||
| PHILIPS |
GR1AX
|
No pic - blank raster when a1 advanced | C2045 22nf leaky - in agc cct to pin 10 ic7020 tda8305 | ||
| PHILIPS |
GR1AX
|
No or low sound. | Select ch38 push store & 2x control buttons for few sec | ||
| PHILIPS |
GR1AX
|
No line start-up | Check/replace d6523 (1n4148; 4822 130 30621) | ||
| PHILIPS |
GR1AX
|
No line start up; +95 available; +9v is about 4.5v. | 1) check/replace c2523 6.8uf (4822 124 41578). 2) check/replace r3058 470r (0.5w; 4822 116 82258 for sets with production code pm.. or zb.. 0.6w; 4822 050 24701 for sets with production code sv..) remarks : initial start-up pulses at pin | ||
| PHILIPS |
GR1AX
|
No ht from chopper cct | D6610 bzx79c10 | ||
| PHILIPS |
GR1AX
|
No frame lock or intermittent false frame lock; no sound. | Set switches to stand by after ten minutes. check pin 22 of ic7020. this voltage should only be low when no signal is present. check/replace c2046 - 22nf (4822 122 40606). | ||
| PHILIPS |
GR1AX
|
No colour. | Check c2302 (10nf; 4822 122 33307). | ||
| PHILIPS |
GR1AX
|
No col & vert black bar down screen | Check for crack in print by pin 10 of loptx | ||
| PHILIPS |
GR1AX
|
No channel change or tuning. | Ic tmp47c434-3559 tuning ic. | ||
| PHILIPS |
GR1AX
|
No +9v, line output stage is ok. | If no +9v starting voltage, check d6523 for open circuit. (4822 130 61219) | ||
| PHILIPS |
GR1AX
|
Modification of lot 4822 140 10369. | Modification of lot 4822 140 10369. ----------------------------------- only for factory codes starting with pm... or zb... the lot (l 5530) for the gr1ax chassis has been modified. this has no or minor consequences for the chassis or the set. however, w | ||
| PHILIPS |
GR1AX
|
Low vol - store /lock was set on | To remove:- select ch38, press store & control up together | ||
| PHILIPS |
GR1AX
|
Low sound | D6715 5v1 zener near ic7700 | ||
| PHILIPS |
GR1AX
|
Losing colour during playback of a video tape. | Change c2322 to 820nf (4822 121 51436) | ||
| PHILIPS |
GR1AX
|
Local controls inoperative. | Check/replace ic 7700 (tmp47c434n-3537 + metal shielding; 4822 310 31947) important: mount the metal shielding | ||
| PHILIPS |
GR1AX
|
Lines on pic after an hour or so on some scenes br | C2523 ( 6.8mfd ) | ||
| PHILIPS |
GR1AX
|
Linearity coil panel. | Linearity coil panel. --------------------- only for 20" with production code pm or zb: for the 20" gr1ax chassis a linearity coil panel has been used on position 5800: service code 4822 212 23641. remarks : only applicable for sets with produc | ||
| PHILIPS |
GR1AX
|
Line transistor 7528 blows within 1 sec. | Check if ic7020 (tda8305) gives output. if not, replace ic7020 (4822 209 60853) remarks : codenumbers of line transistor: but11af 4822 130 42679 but12af 4822 130 43919 | ||
| PHILIPS |
GR1AX
|
Intermittently dead | The cause of this nasty fault turned out to be a small coil , l5524 , which filters the supply to the line driver stage. it was |