| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | BE4A Chassis | Frame collapse. Replaced frame output chip, but picture geometry was not OK. The voltage at pin 8 of MC44007P chip measured low. | If picture Geometry after replacing Vertical outp. Chip is not in order, replace also MC44007P. (Replaced also STR-S5706 in case an overvoltage caused the fault) | ||
| Sony | BE4A Chassis | Frame collapse. Replaced frame output chip, but picture geometry was not OK. The voltage at pin 8 of MC44007P chip measured low. | If picture Geometry after replacing Vertical outp. Chip is not in order, replace also MC44007P. (Replaced also STR-S5706 in case an overvoltage caused the fault) | ||
| Sony | BE4A | Field collapse with visible line | STV9379 fop IC & 24v fusible next to loptx | ||
| Sony | BE4A | Dead - st/by LED flashes 4 times (No lop) | No line drive from IC301 MC44007P - chip u/s | ||
| Sony | BE4A | Dead - CP602 on sec psu o/c | Replacement cures fault only temp - CP602 to N75 (2.5A); Add 5v6 zener between pins 1 & 9 IC803, add 5v6 zener between pins 9 & chassis on print side of pcb | ||
| Sony | BE4A | Dead - 6 blinks from led | Overvolts or current indicated - check HT (118v) - use dummy load; C608 10µ, C620 100µ 160v, STRS5706 poss & loptx | ||
| Sony | BE4/4A | Tripping with 6 flashes from LED & rush of EHT | LOPTx - EHT sect faulty | ||
| Sony | BE4 KVM2171U | Dead after half an hour | STRS5706 IC601 | ||
| Sony | BE4 KV21T3U | Int dead | R607 0R56 2 watts had risen in value to nearly 2 ohms | ||
| Sony | BE4 KV21M3U | Field collapse | R814 0R47 in 24v supply o/c - use proper improved Sony type | ||
| Sony | BE4 KV14T1U | Dead - no led lit or flashing | 0.47R resistor from the 300volts input to the chopper TX was O/C, replace STRS5706 chopper chip, still dead - LOPTr S2055N leaky If LOPTx is grey, R806 1.5R with a 1.8R resistor Part number 1-216-352-11. | ||
| Sony | BE4 KV14T1U | Dead | cracks in print around loptx | ||
| Sony | BE4 KV14T1U | Auto grey scale lines visible at top of screen | EPROM ST24C02CB1 IC002 faulty | ||
| Sony | BE4 Chassis | Int trips off - led flashing 6 times | Blue screen momentarily at sw off - int s/c in crt | ||
| Sony | BE4 | Txt can't be selected - nothing happens when you try | Enter service mode, and at the "TT" prompt type "18". This will turn teletext on or off depending on how it was originally set. Sets which do not feature teletext or have the wrong version of IC001 fitted will only display P100 when teletext is selected. |