Dicas Reparação HITACHI
Modelo - Chassis
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Hitachi | G8Q | Txt - very weak & shows only in mix mode | TDA3562 col dec chip | ||
| Hitachi | G8Q | Tuning - looks off tune - shimmering outline. | IC201 on IF PCB. | ||
| Hitachi | G8Q | Tuning - drift. | IC1503 ( ZTK33B ) | ||
| Hitachi | G8Q | Tuner drift | R001 47k, C001 100nf next to tuner | ||
| Hitachi | G8Q | Trips at sw on | C906 220µ 385v mains smoother | ||
| Hitachi | G8Q | Trips | Pin 2 IC901 incorrect at zero (2.3v). Crack at pin 3 Chopper tfmr | ||
| Hitachi | G8Q | Tripping | C908 220µ fallen slightly in value | ||
| Hitachi | G8Q | Tripping | Try loading 145v HT line from bulb, could be TDA2579A IC701 tb chip. If still no go, lift R713 connected to pin 16 (trip) of IC701. If now ok then Xtal X1501 or EEPROM IC1502 could be cause | ||
| Hitachi | G8Q | Stuck in AV mode. | R1569 ( 10k ) , IC501 | ||
| Hitachi | G8Q | Stuck in AV mode | IC501 micro | ||
| Hitachi | G8Q | Startup - slow start up. | TH902 should read 4k when cold. | ||
| Hitachi | G8Q | St/by only | It is normal for front controls not to bring set out of st/by - check hset is working! | ||
| Hitachi | G8Q | Slow start up with tearing | C933 2200µ 25v in 12v supply o/c | ||
| Hitachi | G8Q | Severe tuning drift | R1501 high / oc 100k or may be 22k | ||
| Hitachi | G8Q | Repeated failure of FOP chip TDA3654 | dry joint scan coil tag & replace cap pin 6 of chip - 47 or 100µ |