| Make | Model | Problem | Solution | Date |
| | | |
| Found: 4551
|
| Philips | GR2 | narrow pic - e/w fault | dry joints TR7533 E/W mod driver - tr7530 BC848 faulty | 14-09-04 |
| Philips | GR2 24ST1724 | Excess width after replacement of faulty LOPTr & line dr chip TDA2579 | R3565 15R o/c - safety res in -26v supply | 14-09-04 |
| Philips | GR2-4 | Faint tripping | C2550 680n 250v leaky | 14-09-04 |
| Philips | GR2.1 | "S" in screen, cannot go from service mode. | Diode 6705 (BZV55; 4822 130 80914) leaks.
| 14-09-04 |
| Philips | GR2.1 | Bad search tuning GR2.1 mono versions on local cable nets. | Add on the monocarrier between junction R3714/R3735 and earth an electrolitic capacitor 1 uF/16V (4822 124 40242) mount the capacitor on the location of the reserved item number 2707.
The problem has been observed on local cable nets special on the lower | 14-09-04 |
| Philips | GR2.1 | Bended horizontal lines at top and bottom of the picture | Mount correctionmodule 4822 212 31384 (seagull), and do the alignments on this module. | 14-09-04 |
| Philips | GR2.1 | 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). | 14-09-04 |
| Philips | GR2.1 | Buzz on sound in mono sets only | The buzz on sound on VCR playback can be reduced by replacing the sound quadrature coil 5035 on the sound IF module. (4822 157 63077). Realign the new coil for optimum sound quality. | 14-09-04 |
| Philips | GR2.1 | Changing option codes. | It has been discovered that changing the option code for nicam (from ON to OFF or vice versa) will not effect this change. If this problem occurs, the option code can be changed as follows:
Change option code for nicam as requested. Change option code fo | 14-09-04 |
| Philips | GR2.1 | Crackling noise in left loudspeaker. | When after replacing R3207 (R3214 for nicam) by a special version code 4822 116 83726 you still hear the cracking noise it can be helpful to resolder the 6 components of the amplifier stage arround 7232 (7217 for nicam). | 14-09-04 |
|
|
| Philips | GR2.1 | Dark screen, LED blinks | If the LED obeys RC, uP is OK. Fault in power supply or TDA4680 (IC7309; 4822 209 63733). The problem occurs in sets produced in the beginning of the series. There is no problem if the software is MR5. | 14-09-04 |
| Philips | GR2.1 | Distorted picture during high contrast scenes (picture breathing) | A production change has been applied to the east/west circuit to maintain the picture shape during scenes with high contrast transients, i.e. between sky and earth.
Position Old New Code number
R3526 82K(100K) 47K | 14-09-04 |
| Philips | GR2.1 | Does not start from cold situation. | Replace resistors R3610 (15B).
R3624 (330K) and R3625 (560K
R3624 330K 1W 5% TOL 4822 053 10334
R3625 560K 0.5W 5% TOL 4822 053 21564
R3610 (4822 050 25601) 10R (Safety) 4822 052 10109
Add resistor of 560R in parallel with C2660 4822 050 25601
In | 14-09-04 |
| Philips | GR2.1 | Does not take (new) channels into memory | IIC bus were low in 15 s intervals. Replacing NICAM unit helps.
| 14-09-04 |
| Philips | GR2.1 | Error nicam, no tuning on VHF channels. | Replace processor IC7708 software version MR4.0 by MR5.2 (4822 209 31209). | 14-09-04 |
| Philips | GR2.1 | Euro module connections | Euro module connections. Stereo models based on the GR2.1 chassis have two SCART sockets, one of which is coloured orange and is located on a pluggable sub-panel referred to as the Euro module.
If the Euro module`s three wiring connectors are unplugged f | 14-09-04 |
| Philips | GR2.1 | Green coloured stripes in picture. | Replace IC7307 (TDA4660; 4822 209 63108), on main panel
| 14-09-04 |
| Philips | GR2.1 | Hotel mode | Hotel mode Receivers employing the GR2.1 chassis are equipped with a "Hotel mode" facility. In this mode certain functions are restricted.
To engage the hotel mode proceed as follows:
First set the volume to the maximum level required when in hotel m | 14-09-04 |
| Philips | GR2.1 | How to enable/disable "Child Lock" | Press "MENU" button on Remote Control. When the menu appears on the
screen, you select "SPECIAL FEATURES" (this expression is language
dependent)
Within "SPECIAL FEATURES", the "CHILD LOCK" can be enabled or
disabled.
| 14-09-04 |
| Philips | GR2.1 | Hum in loudspeaker in stand-by. | In some cases the spread of the resistors R3673 and R3674 causes a too high +16V in stand-by and this provoke a hum in the LS. To solve this problem the 2 resistors have to be changed: R3673 into 4K64 1% 4822 051 54642,
R3674 into 1K05 1% 4822 051 | 14-09-04 |
| Philips | GR2.1 | Hum on standby untill serial number QG079207 | A production change has been introduced changing the value of R3673 from 4.7K to 4.64K, and R3674 from 1.1K to 1.05K.
In cases of specific complaint, this change can also be applied as a service solution.
Position New value Code number R3673 4.64K | 14-09-04 |
| Philips | GR2.1 | List of the microprocessors used in GR2.1 | List of the microprocessors used in GR2.1
DEV. CODE: FSL2-4.0 SUPPLY CODE: U209
DESCRIPTION: STEREO (Eng,Fin,Dan,Swe,Nor,Spa) CRYSTAL: 4.19
REPLACEMENT: 4822 900 10569 Change X-tal 1702 by a 6 Mhz version (4822 242 70392)
Enter the service menu and | 14-09-04 |
| Philips | GR2.1 | List of the microprocessors used in GR2.1 | List of the microprocessors used in GR2.1
DEV. CODE: FSL1-4.0 SUPPLY CODE: U211
DESCRIPTION: STEREO (Eng,Ger,Fr,It,Du,Port) CRYSTAL: 4.19
REPLACEMENT: 4822 209 31209 Change X-tal 1702 by a 6 Mhz version (4822 242 70392
Enter the service menu and set | 14-09-04 |
| Philips | GR2.1 | List of the microprocessors used in GR2.1 | List of the microprocessors used in GR2.1
DEV. CODE: VSL2-4.1 SUPPLY CODE: U111 DESCRIPTION: MONO (Eng,Fin,Dan,Swe,Nor,Spa) CRYSTAL: 4.19 SERVICE CODE: 4822 209 63947 | 14-09-04 |
| Philips | GR2.1 | Modification | Modification East-west circuit has been changed to lower the voltage in transistor 7533 at the moment of switch off. The values of the following components have been changed in production: R3526 to 47k (4822 051 10473).
C2526 to 10nF (4822 122 32442).
| 14-09-04 |
| Philips | GR2.1 | Moire in picture. | Instead of changing the tuner UV916/UV917, add a electrolytic capacitor of 10 uF 25V between pin 12 and pin 16 of the tuner.
REMARKS :1. The capacitor is introduced in production from week 9130 onwards.
2. When changing the electrolytic capacitor C2646 | 14-09-04 |
| Philips | GR2.1 | MR4 to MR5 software change | MR4 to MR5 software change.
After changing a microprocessor with MR4 software by a version with MR5 software it is recommendable to check the option, white balans and peak white limit values. Some values may be overwritten. | 14-09-04 |
| Philips | GR2.1 | No sound when the set is warm, led blinks | Defective IC7309 (TDA4680; 4822 209 31592) blocks IIC bus.
| 14-09-04 |
| Philips | GR2.1 | No sound, no functions and no picture. | On firstly checking the power supply this proved to be OK. On then checking the power on reset circuit, this was identified to be fault. Replacing D6665 (4.7V Zener; 4822 130 80883) and T7663 (BC858; 4822 130 42513) restored operation. | 14-09-04 |
| Philips | GR2.1 | No start voltage on pin 7 and 8 of IC7600 | Voltages should be 2,95V on pin 7 and 14,8V on pin 8 when starting up.Check or replace R3624 (330 kOhm) and R3625 (560 Ohm). | 14-09-04 |