| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Philips | GR2.2 | Red picture is orange. | Check diode D6361 (4822 130 80877; BAV103) | ||
| Philips | GR2.2 | Purple (with SECAM) or grey bar visible on right side of the screen | Modify R3474 from 3K9 into 6K8 (4822 051 10682) and readjust thehorizontal and vertical amplitude if necessary. REMARK: This problem is only valid for sets with blackline S picture tube. | ||
| Philips | GR2.2 | Protection circuit working from time to time | Diode 6592 (LL2C30; 4822 130 80928) leaks. Voltage to protection circuit was ca. 400 mV, it should be 28...23 mV. | ||
| Philips | GR2.2 | Power supply shuts off and plop in speakers. | Check speakers, check IC7240 (TDA1521) (4822 209 73853) and fuse 1240/1242 defective (1,6 AT, 4822 071 51602). | ||
| Philips | GR2.2 | Power supply and L.O.T. O.K. | D6665 (POR diode) is leaking. Replace D6665 (LLZ-C4V7), (4822 130 80883). | ||
| Philips | GR2.2 | Poor greyscale lacking in red content. | Setting RGB levels via service mode has limited effect. Replace EEPROM - IC7710 ST24C02 (4822 209 62098) REMARKS: The information in this IC may become corrupted if a fault lies on the I2C bus. Always rectify the other fault on the I2C bus before repla | ||
| Philips | GR2.2 | Picture mute in upto and incl. QG03 code sets | CRT-panel: Delete pos.nrs 3422, 3423 and 7421, replace 2421 into 27pF (4822 122 31825) and replace 3421 into 150 Kohm (4822 051 10154). Add 2,2 kOhm (4822 051 10222) on pos.nr 4002 and mount a BZV55-C6V2 (4822 130 81512) in parallel to 3421 with anode to | ||
| Philips | GR2.2 | Picture disappears, no sound | Flat cable to horizontal deflection coil is too close to RGB flat cable to picture tube base board. | ||
| Philips | GR2.2 | Picture darkens slightly with subtitling | 1. Replace on the CRT panel R3301, R3331 and R3361 by 470 ohm (4822 051 10471). 2. Mount following series circuit on the CRT panel: A zener diode (BZV55-F10 - 4822 130 81015) in series with a resistor of 330 ohm (4822 116 52219), anode to the resistor. | ||
| Philips | GR2.2 | Only green led is burning. Does not react on RC or local keyboard. | If +5V supply on micro processor is too low, Check D6662 (LLZ-5V1; 4822 130 80905). | ||
| Philips | GR2.2 | Noise in stand-by. | In case of 25"/28" black matrix or 25"/28" black line sets replace on the carrier: A. Position number 3673 by 4K64 (4822 051 54642) Position number 3056 by 1K05 (4822 051 51052) In case of mini neck or narrow nack sets replace on the carrier B. Positi | ||
| Philips | GR2.2 | No TXT, sometimes no picture only sound. | No 27Mhz oscillation on TXT panel. Replace X-tal X1800 (4822 242 81191). | ||
| Philips | GR2.2 | No TXT, error TXT. 6Mhz clock O.K. | Replace IC7820 (4822 209 31069). | ||
| Philips | GR2.2 | No sync. when set is warming-up (or picture tilt after 10 min) | No Y-signal on pin 5 of IC7470 (TDA2579B). D6043(LL4148) interrupts when it is warming-up. Replace D6043 (4822 130 80446). D6043 interrupts when temperature rises. | ||
| Philips | GR2.2 | No sound, sound mute sign on screen. | Voltage on pin 16 is 2V instead of 4V. Check uP, IC7708 (4822 209 31209). |