| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Philips | GR2.2 | BUT12AF keeps blowing every so often | Check mains res cap 220µ 385v for loose rivets | ||
| Philips | GR2.2 | Black picture with unsynchronised teletext bars | Measure on pin 47 IC7800 (SAA5246); if period time is smaller then 1 micro second, replace crystal 1800 (4822 242 81191). | ||
| Philips | GR2.2 | Black picture in teletext mode | Measure on pin 8 IC7800(SAA5246): if the DC voltage of the videosignal is not 1,8 Volt, then replace IC7800 (4822 209 31214). | ||
| Philips | GR2.2 | Bad vertical linearity for 110 degree CRT. | A. For mini/narrow neck and black line sets:R3506 becomes 130K (4822 116 52242) B. For black matrix sets: R3506 becomes 150K (4822 116 52245) C2506 becomes 680uF (4822 124 80063) R3471 becomes 75K (4822 116 52301) C.All sets: C2509 becomes 1uF (482 | ||
| 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 |