| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Panasonic | U4 TXC21 | No power up or relay action | R1351 0R68 0.25w fusible o/c | ||
| Panasonic | U4 | Tuning - intermittent. | IC SAB3035 IC dry jointed. | ||
| Panasonic | U4 | Sync - no sync or sound. | DJ on pins of socket Z6. | ||
| Panasonic | U4 | Standby - comes on in standby. | Relay RY1001 carbonised contacts. | ||
| Panasonic | U4 | SET STARTS UP BUT SHUTS DOWN INSTANTLY | C808 47uF 16v OC | ||
| Panasonic | U4 | No sound or sync. | DJ on pins of socket Z6. | ||
| Panasonic | U4 | No sound & blank raster. | L102 o/c. | ||
| Panasonic | U4 | No R/C operation | No 12v to r/c Rx; R1336 150R hi res; & replace 12v zener | ||
| Panasonic | U4 | Memory loss - intermittent. | Re-solder crystals associated with MAB8440 & SAB3055. | ||
| Panasonic | U4 | Dead - no EHT - diplay = 00 ; HT = 60v | LOPTx u/s tho' checked ok on tester - NLA? | ||
| Panasonic | U4 | COMES ON THEN SHUTS OFF | C808 47u 16v | ||
| Panasonic | U4 | Comes on in standby if on/off switch is used. | Relay RY1001 carbonised contacts. | ||
| Panasonic | U4 | Blank raster & no sound. | L102 o/c. | ||
| Panasonic | U3W | Verticals corrugated - noise at switch on. | C809 ( 1u f 350v ) | ||
| Panasonic | U3W | No sigs or chan display from cold | TMS3453N2L memory chip (£31 from WVE) |