GRUNDIG CUC7301 Repair Tips
Search: CUC7301 GRUNDIG
Results 25
Results 25
| Make | Model Ch. | Symptom | Problem Solution | Solution | By: |
|---|---|---|---|---|---|
| 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 | 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 | ||
| Grundig | CUC7301/3 | Dead after dry joint C669 caused havoc | T665 MJF18004C chopper s/c; IC630 µC3842N/AN; D621-4 1N4007; R661 220R; D663 3v6 zener; CD651 ZD18v; D667 BA157 leaky. | ||
| Grundig | CUC7301/3 | Dead - PSU blown | Caused by dry joint C669 - repair kits available from SEME or CHS also check C626 47u 385v for o/c | ||
| Grundig | CUC7301 | Dead aft few mins - line drive lost | Buffer CT169 BC858B sm tr faulty | ||
| Grundig | CUC7301 | Vert cogging, line speed int decreases with narrow pic & overheating LOPTr | CT169 BC858B sm pre-driver tr (2" back from jungle chip - LOPTx side of scart skt) | ||
| Grundig | CUC7301 | Tripping with front led flashing | No HT on dummy load - HT preset R654 470R o/c | ||
| Grundig | CUC7301 | St/by only | C667 100µ 35v | ||
| Grundig | CUC7301 | Sound only - burst of line at sw on only | Line osc at base of Line dr tr - nothing at collector. CT169 line osc buffer BC858B sm faulty. Note - HT is 105v when set working but rises to 129v in st/by or when non operational - normal? | ||
| Grundig | CUC7301 | Reduced width and line tearing when TV gets hot. | Replace surface mount transistor CT169 BC858B | ||
| Grundig | CUC7301 | PSU rebuild | Check mains smoother C626 47µ 385v or PSU may need rebuilding again | ||
| Grundig | CUC7301 | Poor regulation of psu | sm diodes cd 654 and cd656 leaky. They are type LS4148 but standard 1N4148 ,s work ok. | ||
| Grundig | CUC7301 | Pic pulled across to right | CT169 BC858B sm leaky | ||
| Grundig | CUC7301 | Pic goes bright & may trip | CT181 BC858B & CT186 BC848B sm on main pcb | ||
| Grundig | CUC7301 | off with a bang | C669 1000pf had dry joints causing burn up of pcb. Following parts replaced :- 2.5A fuse, IC638 uC3842AN, T665 chopper tr MJF18004C, D662 BA157 s/c, D663 ZPD3.6 3.6v zener s/c, R663 18R, R661 220R hi res, R669 5w | ||
| Grundig | CUC7301 | off chopper tr s/c c-b | T665 MJE18004C, D664, 666 1N4003, CD654,CD656 LS4148, IC630 UC3842A, D663 6.3v zener, R661 220R replaced & dry joint C669 | ||
| Grundig | CUC7301 | low sound -stuck in hotel mode | hold 'i' button whilst switching tv on. Use rc arrows to select hotel mode then off | ||
| Grundig | CUC7301 | Low sound & no set up menu | In hotel mode - to exit - hold down "i" button at sw on | ||
| Grundig | CUC7301 | Field lin poor, width reduced & HT only 100v | R666 & 667 in psu 0R82 had risen to 1R5 (values depend on crt size) | ||
| Grundig | CUC7301 | Dead - R542 10k or 13k o/c | When replaced overheated again - crack in print by lopt |