| Make | Model | Problem | Solution | Date |
| | | |
| Found: 626
|
| Bush | 2850NTX Schneider TV4 | Bent verticals and pulsating width (Scene Dependent) | Replace CC808 4N7 SMD primary side of PSU you will probably find that
the pcb in this area has taken some heat. | 14-09-04 |
| Bush | 2850NTX TV4 | Line collapse | Can be dry joints scan coil plug but C419 330nF 400v scan coupling cap burnt & o/c in this case | 14-09-04 |
| Bush | 2850NTX TV8 | Dead apart from led flicker at sw on | C203 47µ 250v - checked ok out of cct | 14-09-04 |
| Bush | 2850NTX-A | Dead aft brief micro activity | Micro reqs sync pulse at pin 26 within 1 sec from line to function. This was missing due to T301 BC547B in line stage leaky | 14-09-04 |
| Bush | 2850NTX-A | Line & field collapse (single dot) | Burnt line scan coils plug & TDA8170 fop chip, D402 BA157, fus res R408 o/c | 14-09-04 |
| Bush | 2850NTX-MS | slow start up - reset problem | IC101 pin 33 needs 4.8v to start up mod - add 1µ & 100k res to 5v line | 14-09-04 |
| Bush | 2850NTX/A | Dead - no line scan | Scan pug/skt melted, after repair still faulty due to C307 330nF scan coupling cap o/c & check dry joints | 14-09-04 |
| Bush | 2850NTX/MS | no graphics, front panel buttons are inoperative, remote is inoperative,no sound, no picture - only blank full size raster with 4-5 coloured horizontal lines on the screen. | no flyback supply voltage to frame IC TDA8351 pin 6 caused by R438 0.22 Ohm o/c (near LOPT). | 14-09-04 |
| Bush | 2850NTXA | Dead with squegging noise from speaker | Cry joints C307 in line stage & field coll then visible, TDA8170 & R408 0R22 | 14-09-04 |
| Bush | 2850NTXA | E-W faulty | T302 (BC547) S/C and T303 (BC557) leaky. | 14-09-04 |
|
|
| Bush | 2850NTXA | Field collapse | TDA8170 & R408 0R22 | 14-09-04 |
| Bush | 2857 | off | C914 4n7 across HT rect leaky | 14-09-04 |
| Bush | 2857 | Poor V & H sync | C127 in screened can housing IC102 TDA3805 | 14-09-04 |
| Bush | 2857NTX | Blank raster | No 12v supply to tuner - R327 2R2 o/c | 14-09-04 |
| Bush | 2857NTX | Blank raster - sound ok | R436 6R8 hi res | 14-09-04 |
| Bush | 2857NTX | Blank raster - sound ok | 12v to IC397 & 304 low - R435 0R68 1w o/c | 14-09-04 |
| Bush | 2857NTX | Blank screen & no controls | 5v supply drops to 3.4v out of st/by - IC103 faulty | 14-09-04 |
| Bush | 2857NTX | C926 blown/smoking - HT unstable | C908 & C910 | 14-09-04 |
| Bush | 2857NTX | Dead | o/c 0.68 ohm 1 Watt resistor on the secondary of the chopper transformer. | 14-09-04 |
| Bush | 2857NTX | Dead - off with bang/smoke | C925 1000µ 25v, C926 22µ 160v, R916 0R68 1w safety res, C910 47µ 25v & other unreliable caps as in Onwa | 14-09-04 |
| Bush | 2857NTX | Dead apart from Screaming PSU | 145v HT safety res smoking & hi res; 16v rail safety res o/c (Both inc yellow sleeving) - main cause C926 22µ 160v s/c - usual cause of 16v rail demise = Onwa psu caps | 14-09-04 |
| Bush | 2857NTX | Field bounce - esp when cold | C127 3µ3 off pin 10 IC102 | 14-09-04 |
| Bush | 2857NTX | Flat looking pic | R433 150k in beam lim | 14-09-04 |
| Bush | 2857NTX | Frame bounce | Adj AGC | 14-09-04 |
| Bush | 2857NTX | HT high and uncontrollable | chopper base control tr leaky | 14-09-04 |
| Bush | 2857NTX | Left hand side darker than right | C424 10µ 160v in RGB o/p supply | 14-09-04 |
| Bush | 2857NTX | Low contrast & col | R433 150k near LOPTx o/c | 14-09-04 |
| Bush | 2857NTX | Nicam popping | X001 13.104Mhz Xtal faulty | 14-09-04 |
| Bush | 2857NTX | No pic - just grey raster, sound & OSG OK | R435 0R68 12v reg feed res gone hi res | 14-09-04 |
| Bush | 2857NTX | No sound | IC101 TDA3857 sound IF | 14-09-04 |