Grundig Repair Tips
Search: Grundig
Results: 948
Results: 948
| Make | Model | Symptom | Problem | Solution | By |
|---|---|---|---|---|---|
| GRUNDIG |
CUC7303
|
Won't go fully into st/by - crt heaters stay lit etc | Pin 1 ic676 should drop to 1.2v in st/by - was staying at 10.7v. bc848 sm tr downstream from pin 1 was faulty though checked ok | ||
| GRUNDIG |
CUC7303
|
St/by led blinks (tripping) | D667 ba157 -use ba159 in lieu, uc3842 supply rect (measured ok) also check 0r82 res in emitter, 2 x 1n4004 & res 220r & sm ls4148 diodes & ht control for o/c + chopper tr & ic | ||
| GRUNDIG |
CUC7303
|
Off burning smell | Bad joints mains sw | ||
| GRUNDIG |
CUC7303
|
Led blinks at 1 hz rate,no start-up | Change d667 (ba 157) even if it reads ok!!. | ||
| GRUNDIG |
CUC7303
|
Dead with mains fuse o/c | Degauss positor | ||
| GRUNDIG |
CUC7303
|
Dead apart from led flashing | Sw mode trnfmr o/c winding between pins 5 & 7 (was able to repair) | ||
| GRUNDIG |
CUC7303
|
Dead - psu blown | Chopper tfmr, s2055 loptr & fop chip | ||
| 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 |