hitachi Repair Tips
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Results 930
Results 930
| Make | Model Ch. | Symptom | Problem Solution | Solution | By: |
|---|---|---|---|---|---|
| Hitachi | G7PII | int field collapse | 9v supply to field chip drops to zero, IC703 MC7809 faulty or dy jointed | ||
| Hitachi | G7PII | field collapse | R719 2R2 safety res o/c - no other fault found | ||
| Hitachi | G7PII | dead - gives a rush of noise thr' spkr initially | C914 10µ 50v, C910 33µ 10v, C929 1µ 50v, C915 100µ 10v, C917 4µ7 50v all 105 deg | ||
| Hitachi | G7PII | dead | 82k start up resistors o/c & hi res | ||
| Hitachi | G7PII | dead | ZD903 130v zener s/c; replace R909 39k, R912 47k, R902/3 82k, C906 4µ7, Q905 BF423 | ||
| Hitachi | G7PII | Dead | R931 150k o/c; IC901 internal s/c; 2 diodes on print side s/c (between chassis & Q901 base) - 1N4148 & 6v2 zener; BUT11AF o/c base | ||
| Hitachi | G7PII | Dead | C919 4n7 1kv had split - replacement was 2n2 | ||
| Hitachi | G7P2 | WONT START | CHECK - R931 ( 150K ) , R932 ( 120K ) , R919 AND R920 ( 100K ) CONNECTED IN PAIRS TO TDA4601 | ||
| Hitachi | G7P MkII CPT2508 | Pic pulls to right when heated | Q905 connection to pcb suspect - resolder | ||
| Hitachi | G7P MkII CPT2508 | Dead - LOPTr blows | IC701 TDA2579 | ||
| Hitachi | G7P Mk2 | Won't start up again aft being switched off | R913 100R in base of chopper tr o/c | ||
| Hitachi | G7P Mk2 | Tuning drift & nothing tuneable above Ch36 | Only 7v across 33v zener. IC101 HD401304R12S faulty | ||
| Hitachi | G7P Mk2 | Trips at sw on | C737 100µ in trip cct o/c | ||
| Hitachi | G7P Mk2 | Snowy raster & no controls work | pin 15 IC101 micro high -caused by faulty IC601 AN5521 FOP chip | ||
| Hitachi | G7P Mk2 | Reverts to st/by aft few mins | HT gone high as C906 4µ7 250v is faulty | ||
| Hitachi | G7P Mk2 | Pic blanks out int or goes bright & trips | C711 47µ 200v dry jointed by LOPTx | ||
| Hitachi | G7P Mk2 | off with smoke | C919 4n7 1kv & C928 2n2 1kv cracked cases | ||
| Hitachi | G7P Mk2 | off | R901 6R8 5W o/c BUT12AF chopper tr s/c ZD903 180v over volts diode ZD903s/c | ||
| Hitachi | G7P Mk2 | no tuning | R044 12k 0.5w o/c ZD002 30v tuning volts diode o/c | ||
| Hitachi | G7P Mk2 | No start up | C911 82pf across pins 2 & 3 TDA4601 psu chip |