GRUNDIG TV Repair: Common Faults and Solutions.
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Results: 948
GRUNDIG Repair Guide: Common Issues and Fixes
| Brand | Model | Fault | Detailed Problem | Solution | By |
|---|---|---|---|---|---|
| GRUNDIG | CUC2080 | After replacment of fbt, the set starts and reverts to standby mode immediately. if the crt heater is fed by an external transformer i.e. 6 v. a/c, the screen will show a very weak light, except in the corners | 13v. was present on pin 11 of v. output ic tda8350q during the brief moment when the set tried to start. the tda8350q was found to be defective and was replaced. don't forget to check +a voltage after replacing the fbt | ||
| GRUNDIG | M70-495 CUC-3800 | Dead set | I replaced the bu546 transistor in the power supply and resoldered some paths on the pcb. an intermittent soldering path to the collector of the transistor was the reason for the destroyed bu546 | ||
| GRUNDIG | ST82-774 TOP/EURO | Not starting, power supply working perfectly display present | Replaced the horizontal deflection power driver ic tda8140 | ||
| GRUNDIG | CUC6310 | No east-west | Check r569, tda8145, d566 | ||
| GRUNDIG | T55-731 CUC7303 / FET TYPE | Dead bridge and chopper transistor s/c | If no d663 fitted this is version 2 has fet and uc3843. failure of p.s components caused by c669 dry jointed. check/change fet buz90, d667 ba157, r661 4.7k not 220r version 1, r666 and r667 56r 1w, r663 10r and the uc3843. all values for 20" | ||
| GRUNDIG | M82-795 CUC7880 | Dead, 800ma fuse blown | Check for dry joints on the chopper transformer also check d663, d664, d666, c653 4.7nf and c667 2.2uf | ||
| GRUNDIG | CUC5350 | Goes to standby after a short time | Replace c631 1uf, 63v | ||
| GRUNDIG | VS920 | No remote control operation or modulator output | Unlock the video with code 4934 + ok. check if you have the remote control set on video 1. when you have the rp 95 remote you can set the remote to video 1 with code 8527 + ok | ||
| GRUNDIG | T55-640 CUC 6300 | Sleep timer box on screen, remote & front buttons not working | Changed the eeprom ic847 24c04 | ||
| GRUNDIG | CUC5310 | Picture int disappears leaving snow on screen | Resolder the xtal in the tuner | ||
| GRUNDIG | M70-490/9 TEXT CUC3800 | No sound, picture ok | When shifting up the channel frequency using the fine tuning, a very weak sound could be heard. replaced the sound if demodulator chip u2829bic2110 | ||
| GRUNDIG | CUC5310 | Dead, no shorts found | Look for dry joints on the scan coil plug may not be visible also solder the 12v and 5v regs | ||
| GRUNDIG | ST70-460 CUC4635 | Intermittent start up and tripping | Dry joint on r636, vertically mounted 4.7Ω wirewound in sw mode circuit | ||
| GRUNDIG | CUC7301/3 | Power supply blown | This is often caused by a dry joint at c669 in the snubber network but also check the mains bridge rectifiers reservoir capacitor 47uf, 385v for o/c, this item is not included in the ususal p.s.u repair kits and if not checked may result in a repeat blow up ! | ||
| GRUNDIG | G1000 | Tripping with burning smell | Loptx | ||
| GRUNDIG | G1000 | St/by only | No line drive - r314 6k8 2w o/c | ||
| GRUNDIG | G1000 | Blank raster and narrow | R315 10r o/c - supply to rgb stage also dry joints power trs | ||
| GRUNDIG | CUC7350 | Dead - mains fuse shattered | D60013/4 mains rects s/c, chopper fet t60020 irfbc40 s/c used buz90 uc3843 replaced as prec,caused by dry joints chopper tfmr | ||
| GRUNDIG | CUC7350 | Dead - +8v supply absent | R61021 15r safety res in 8v reg o/c | ||
| GRUNDIG | CUC7301/3 | Mains fuse s1600 2.5a blows int | 1n4007 mains rect diode, also check ic630, t665chopper tr, zener d663, r661220r,caps c661/663/656 & 667 |