| Make | Model | Problem | Solution | Date |
| | | |
| Found: 4551
|
| Philips | GR1AX | Linearity coil panel. | Linearity coil panel.
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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 | 14-09-04 |
| Philips | GR1AX | LINES ON PIC AFTER AN HOUR OR SO ON SOME SCENES br | C2523 ( 6.8mfd ) | 14-09-04 |
| Philips | GR1AX | Local controls inoperative. | Check/replace
IC 7700 (TMP47C434N-3537 + metal shielding; 4822 310 31947)
Important: mount the metal shielding
| 14-09-04 |
| Philips | GR1AX | Loosing colour during play-back of a video tape. | Change C2322 to 820nF (4822 121 51436) | 14-09-04 |
| Philips | GR1AX | LOW SOUND | D6715 5v1 ZENER NEAR IC7700 | 14-09-04 |
| Philips | GR1AX | Low Vol - store /lock was set on | To remove:- select Ch38, press Store & Control up together | 14-09-04 |
| Philips | GR1AX | Modification of LOT 4822 140 10369. | Modification of LOT 4822 140 10369.
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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 | 14-09-04 |
| Philips | GR1AX | No +9V, line output stage is OK. | If no +9V starting voltage, check D6523 for open circuit.
(4822 130 61219)
| 14-09-04 |
| Philips | GR1AX | No channel change or tuning. | IC TMP47C434-3559 tuning IC. | 14-09-04 |
| Philips | GR1AX | No col & vert black bar down screen | Check for crack in print by pin 10 of LOPTx | 14-09-04 |
|
|
| Philips | GR1AX | No colour. | Check C2302 (10nF; 4822 122 33307).
| 14-09-04 |
| 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).
| 14-09-04 |
| Philips | GR1AX | No HT from chopper cct | D6610 BZX79C10 | 14-09-04 |
| 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 | 14-09-04 |
| Philips | GR1AX | No line start-up | Check/replace D6523 (1N4148; 4822 130 30621)
| 14-09-04 |
| Philips | GR1AX | No or low sound. | Select ch38 push store & 2x control buttons for few sec | 14-09-04 |
| Philips | GR1AX | No pic - blank raster when A1 advanced | C2045 22nF leaky - In AGC cct to pin 10 IC7020 TDA8305 | 14-09-04 |
| Philips | GR1AX | No picture. OSD OK | Voltage pin 10 IC7020 too low.
Check C2045 (22nF; 4822 122 30103).
| 14-09-04 |
| Philips | GR1AX | No sound | Mono af sig present at I/p to IC7100 TDA8415 but no o/p - chip u/s | 14-09-04 |
| Philips | GR1AX | No sound or pic | replacing tuner brought back sound - pic? | 14-09-04 |
| Philips | GR1AX | No sound or pic - loud hum thro spkr | LOPTx faulty | 14-09-04 |
| Philips | GR1AX | No sound or picture. | D6613 BYX79C15 leaky. | 14-09-04 |
| Philips | GR1AX | No sound or vision - low humming | LOPTx leak between windings 6-10 & 8-9 | 14-09-04 |
| Philips | GR1AX | No sound. | Check IC7103 (TDA7052; 4822 209 60956).
If IC7103 needs to be replaced, it is recommended to:
* Delete jumper 9063 and diode 6101 (between pin 4 and 7 of IC7103)
* Add jumper 9105 soldered to pin 4 and 7 of IC7103.
REMARKS :
This informati | 14-09-04 |
| Philips | GR1AX | No sound/pic - just blank screen | C2044 4µ s/c | 14-09-04 |
| Philips | GR1AX | No sound/pic 95v HT only 10v | Low res across +9 (10v) supply; was sound chip & D6613 BYX79C15 zener leaky | 14-09-04 |
| Philips | GR1AX | No tuning | R3703 oc | 14-09-04 |
| Philips | GR1AX | No tuning volts | Check R3703 o/c | 14-09-04 |
| Philips | GR1AX | NO VIS , BLANK UNMODULATED RASTER | C2045 ( 22nF ) CERAMIC CAP LEAKY | 14-09-04 |
| Philips | GR1AX | OSD-display is black and white. | Check/replace D6761 (1N4148; 4822 130 30621).
| 14-09-04 |