| Make | Model | Problem | Solution | Date |
| | | |
| Found: 4551
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| Philips | GR2.2 | No TXT, sometimes no picture only sound. | No 27Mhz oscillation on TXT panel. Replace X-tal X1800 (4822 242 81191). | 14-09-04 |
| 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 | 14-09-04 |
| 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). | 14-09-04 |
| 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. | 14-09-04 |
| 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. | 14-09-04 |
| 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 | 14-09-04 |
| 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 | 14-09-04 |
| Philips | GR2.2 | Power supply and L.O.T. O.K. | D6665 (POR diode) is leaking. Replace D6665 (LLZ-C4V7), (4822 130 80883). | 14-09-04 |
| 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). | 14-09-04 |
| 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. | 14-09-04 |
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| 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. | 14-09-04 |
| Philips | GR2.2 | Red picture is orange. | Check diode D6361 (4822 130 80877; BAV103)
| 14-09-04 |
| Philips | GR2.2 | Screeching noise then dead - LOPTr goes s/c | TDA2579B timebase IC | 14-09-04 |
| Philips | GR2.2 | Service manual corrections | Service manual corrections The parts lists of GR2 service manuals should be corrected as follows:
Service manual for 21ST2731/05B 4822 727 19403
Add control panel code no. 4822 432 10957
Service manual for 25ST1750/25B 4822 727 19042
Item | 14-09-04 |
| Philips | GR2.2 | Service Mode access | Short pins M43 and M44 on chassis to get into service menu | 14-09-04 |
| Philips | GR2.2 | Set dead and SOPS tripping | This fault was caused by D6646 (4822 130 42488) and C2646 (4822 124 80054) both being short circuit. | 14-09-04 |
| Philips | GR2.2 | Set responds very slow to commands from either RC or local keypad. | Fault suspected to be databus problem. Upon removing the teletext PCB normal operation resumed. Fault was found to be caused by low +5V on text board, caused by T7872 (4822 130 41344) being open circuit. | 14-09-04 |
| Philips | GR2.2 | Skips VCR channel when tuning | Some cases may occur where a GR2.2 receiver will not capture a VCR test signal during tuning. This is because some VCR test signals do not include complete field and line sync pulses which the receiver requires for ident purposes.
The simple answer is t | 14-09-04 |
| Philips | GR2.2 | Sometimes no TXT. Sometimes wrong characters. | Clock 27Mhz O.K. Replace IC7800 (SAA5246AP/ E/S 4822 209 32642). Replace X1800 (4822 242 81191) | 14-09-04 |
| Philips | GR2.2 | Sops moire in the picture | Replace pos.nr. R3450 by 27kOhm (4822 053 11273) on the chassis
REMARKS: introduced in production from week 9438 onwards | 14-09-04 |
| Philips | GR2.2 | Sound mute and searching does not stop | Replace Micro IC7708 (4822 209 31212) and IC7470 TDA2579B (4822 209 63423) on the chassis. | 14-09-04 |
| Philips | GR2.2 | Sound mute on cable networks and with some VCRs. | Remove R3064 on stereo IF module, replace R3065 by 4K7 (4822 051 10472).
Add on R3070 8K2 (4822 051 10822). | 14-09-04 |
| Philips | GR2.2 | Sound mute on cable networks and with some VCRs. | Remove 9202 and place 4K7 (4822 051 10472) between pin 18 and ground of position number 7200 (TDA8417) and place 8K2 (4822 051 10822) between pin 15 and 18 of position number 7200. | 14-09-04 |
| Philips | GR2.2 | Sound mute on cable networks and with some VCRs. | Cut the copper track from pin 18 of position number 7200 (TDA8415) to the "via hole" and solder 8K2 (4822 051 10822) between pin 15 and pin 18 of position number 7200 and solder 4K7 (4822 051 10472). | 14-09-04 |
| Philips | GR2.2 | Teletext panel | Teletext panel Early versions of the GR2.2 chassis use the teletext decoder of the GR2.1 AB (4 IC version). From week 9228 the 3 IC version (shown in the GR2.2 AA manual page 6.54) is used. However, the circuit and PCB layout are changed. For details o | 14-09-04 |
| Philips | GR2.2 | The width changes up to 2 cm when adjusting contrast | Capacitor 2526 (4822 122 32857) leaks on picture tube panel.
| 14-09-04 |
| Philips | GR2.2 | Too little color saturation in CVBS mode | In teletext mode, color saturation is OK. Check supply voltage for IC7307. When < 5 volt, replace D6310 (LLZ-C5V1; 4822 130 80884) | 14-09-04 |
| Philips | GR2.2 | Totally dead. | Check and replace R3624 and R3625 in the power supply. Codenumbers: R3624 330 kOhm 4822 053 10334, R3625 560 kOhm 4822 053 21564. | 14-09-04 |
| Philips | GR2.2 | Tripped at sw on with no LEDs | HT ok at 148v when LOP dis'd; when 32v line dis'd set starts up - st/by thy6670 faulty | 14-09-04 |
| Philips | GR2.2 | Unstable picture on some programs. | This is valid for sets with ECO IF (AG/QG05 or higher). See service info GR2.2 AA94.01 (4822 727 20094) Circuit diagram D. On IC7004, TDA9815 pin 7, remove C2007 (4n7), change 3002 into 470E. C2004 and C2014 should be together 220 nF. When C2014 = 330 nF | 14-09-04 |