| Make | Model | Problem | Solution | Date |
| | | |
| Found: 25
|
| Grundig | CUC3300 CUC3400 | Poor focus | Usually the focus pot on tripler faulty but check C433 1000µ for s/c, if its 16v working - fit 25vw (can cause scan coils to overheat) | 14-09-04 |
| Grundig | CUC3400 | +B decreasing when average brightness of picture increases. | Change C611 47uF cap. | 14-09-04 |
|
|
| Grundig | CUC3400 | Arcing/random chan change | tripler | 14-09-04 |
| Grundig | CUC3400 | Blue raster with fb lines | TDA3505 vid proc chip IC9531 on chroma board | 14-09-04 |
| Grundig | CUC3400 | dead | on/off sw u/s CHS - G102 | 14-09-04 |
| Grundig | CUC3400 | Dead - & tripping. | Set HT control ( R637 ) int o/c , D666/D664 s/c , IC686 78M05 | 14-09-04 |
| Grundig | CUC3400 | Dead - all fuses intact | D691 BYV28/100 s/c (20v supply) | 14-09-04 |
| Grundig | CUC3400 | Dead - repeatedly blows T661 | Replace IC655 TDA3640, D666 RGP30M, R637 1k preset, C661 47µ 63v, D662 ZPD3v9, R661 1R & C667 0µ15 or 2µ2 | 14-09-04 |
| Grundig | CUC3400 | DEAD 800mA FUSE BLOWN | DRY JOINTS ON CHOPPER TX CHECK D663 664 666 C653 4n7 C667 2u2 | 14-09-04 |
| Grundig | CUC3400 | Dead or tripping | Set HT pot R637, D666 BYV16 s/c, D664 BA159 s/c or IC686 78M05 s/c | 14-09-04 |
| Grundig | CUC3400 | Dead with buzz from Ipsalo Tfmr | The +M supply ok at 11v in st/by but dropped instead of increasing to 20v when sw on. C630 0µ68 leaky | 14-09-04 |
| Grundig | CUC3400 | Dead, 800mA SI642 fuse o/c, chopper T661 BUT11A s/c | Check for dry joints Ipsalo tfmr or D663, 664 & 666 faulty also check C667 2µ2 | 14-09-04 |
| Grundig | CUC3400 | Dead. | Drys on main PCB. | 14-09-04 |
| Grundig | CUC3400 | Int colour & rh side of pic blanked | TDA2579 timebase chip | 14-09-04 |
| Grundig | CUC3400 | Int dead | Pin 0 on lopt (eht overwind) arcing internally - new lopt reqd | 14-09-04 |
| Grundig | CUC3400 | Int or perm tripping - ok on dummy load | Timing cap C653 4n7 | 14-09-04 |
| Grundig | CUC3400 | No chan change when cold - display changes ok tho' | Dry joint pin 15 tuner/if socket | 14-09-04 |
| Grundig | CUC3400 | No sound | C266 1000µ 25v s/c; R367 8R2 safety res o/c | 14-09-04 |
| Grundig | CUC3400 | No start up - ticks | C653 4n7 connected to pin 15 of power chip u/s | 14-09-04 |
| Grundig | CUC3400 | No start up with ticking | HT at chopper coll - C653 4n7 connected to pin 15 power chip u/s | 14-09-04 |
| Grundig | CUC3400 | Poor purity & focus. | C433 ( 1 , 000uf , 25v ) | 14-09-04 |
| Grundig | CUC3400 | Poor R/C response | R1212 33R missing in sensor pcb | 14-09-04 |
|
|
| Grundig | CUC3400 | Startup - No s/up - ticking from transformer. | C653 ( 4.7nf ) connected to pin 15 of IC. | 14-09-04 |
| Grundig | CUC3400 | tripping | set ht pot R637 | 14-09-04 |
| Grundig | CUC3400 | Tripping comes on if adj line frequency down. | C653 ( 4.7u f ) | 14-09-04 |