| Make | Model | Problem | Solution | Date |
| | | |
| Found: 15
|
| Onwa | 1402 | Snow only - tuning but no store | The -30v supply to IC601 pin 9 low. ZD601 30v zener leaky | 14-09-04 |
| Onwa | CTVK9228 | Tuner drift then loss of sigs | No 33v at reg chip due to o/c print in centre of pcb due to black glue corrosion | 14-09-04 |
| Onwa | K9228 | Dead - burn up in PSU | IC901 STRS6309, IC902 TLP721, IC903 SE140, VR901 5k preset, Q902 2SA1015, R914 47R 1/16W, R915 82k 1/16w, R916 120R 1/4w, D907 RG2 s/c. Check HT at TP405 for 150v | 14-09-04 |
| Onwa | K9228 | Dead - no line drive | R306 10k or 5k6 5w | 14-09-04 |
| Onwa | K9228 | Field collapse | R422 o/c, Field chip TA8427K s/c | 14-09-04 |
| Onwa | K9228 | St/by - has hum on sound in st/by | Q904 2SD1015 & Q906 2SD804 in 27v supply | 14-09-04 |
| Onwa | K9228 | St/by has a bright raster | Q903 2SA1013, Q902 2SD1545 | 14-09-04 |
| Onwa | K9228 | St/by only | Q903 2SA879-R s/c, R925 1k5 o/c & R960? 56R between Q903 coll & Q905 base | 14-09-04 |
| Onwa | K9228 | St/by only | No clock osc - 8Mhz Xtal faulty | 14-09-04 |
| Onwa | K9228 | Tripping psu | Q402 BU508AF lop tr s/c, C417 4n7 1.6kv bulging | 14-09-04 |
|
|
| Onwa | K9228 | Won't go into st/by (leaves blank raster) | Q903 2SA879 HT sw tr (BF470 works) | 14-09-04 |
| Onwa | K9715 | Int field scan - chip overheats | C402, 405, 409, 414 | 14-09-04 |
| Onwa | K9715 | Tuner drift | C106 0µ47 tant | 14-09-04 |
| Onwa | various | Int dead / fizzing | Check HT relay | 14-09-04 |
| Onwa | Various | The Onwa TV PSU | See TV Mag Feb 1998 | 14-09-04 |