| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| 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 | ||
| 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. | ||
| 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). | ||
| 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 | ||
| 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. | ||
| 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). | ||
| 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. | ||
| 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 | ||
| Philips | GR2.1 | "S" in screen, cannot go from service mode. | Diode 6705 (BZV55; 4822 130 80914) leaks. | ||
| Philips | GR2 24ST1724 | Excess width after replacement of faulty LOPTr & line dr chip TDA2579 | R3565 15R o/c - safety res in -26v supply | ||
| Philips | GR2 | narrow pic - e/w fault | dry joints TR7533 E/W mod driver - tr7530 BC848 faulty | ||
| Philips | GR2 | Int shutdown & poor response to R/C & OSD corrupted | CNR50 | ||
| Philips | GR2 | INT SHUTDOWN | CNR50 POWER CONTROL IC | ||
| Philips | GR1AX chassis | Arcing sounds on startup. | Change Capacitor 2523 6,8uF | ||
| Philips | GR1AX chassis | Arcing sounds on startup. | Change Capacitor 2523 6,8uF |