Dicas Reparação HITACHI
Modelo - Chassis
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Hitachi | G8Q | BLANK SCREEN + NO SOUND ONLY CERTAIN CHANNELS | SELECT BLANK CHANNELS PRESS TUNE/AFC VOL - STORE THEN DO THE SAME ON OTHER CHANNELS THEN PRESS TUNE/AFC | ||
| Hitachi | G8Q | Blank raster/no sound/tuning/front display distorted | Micro reqs reprog - see separate article | ||
| Hitachi | G8Q | Blank raster, can't tune chans & front controls operate different functions | Reprog memory chip IC502 | ||
| Hitachi | G8Q | Blank raster &/or line twitch | C933 2200µ & C937 1µ in 12v reg cct | ||
| Hitachi | G8Q | Blank raster & no sound - stuck in AV mode | IC1501 micro faulty - pin 37 was being held low perm (should be low only when in AV mode) | ||
| Hitachi | G8Q | blank raster - no chan display | odd dashes pesent when buttons pressed. No 5v supply- D934 in chopper psu s/c & R933 2R0 u/s | ||
| Hitachi | G7PSMK2 | Standby only. | R902 ( 82k ) o/c. | ||
| Hitachi | G7PSMK2 | Int frame collapse. | Drys on frame IC & LOPT. | ||
| Hitachi | G7PSMK2 | Dead - HT low 45v. | Change C910 , C914 , C916 , C929 | ||
| Hitachi | G7PSMK2 | Dead - HT at 145v. | R909 high. | ||
| Hitachi | G7PSL2 | St/by only | ZD903 130v zener s/c; C906 4µ7 250v hi esr; R901 6R8 5w o/c;Q903 BUT12AF s/c; F901 2.5A o/c - all caused by dry joints T901 | ||
| Hitachi | G7PSL | St/by only | Q781 2SD1884 LOPTr, Q903 BUT12AF chopper tr & ZD903 P6KE180A overvolts zener s/c - R760, R761, R762 & R766 2R2 ½w hi res | ||
| Hitachi | G7PSL | NO TUNING - JUST SNOW ( TUNING BAR PRESENT ON SCRE | R044 12k OC. ZD002 ( 33V Zen ) Q003 | ||
| Hitachi | G7PSL | No signals - osd searches | Tuning volts missing VT pin tuner, R044 12k o/c | ||
| Hitachi | G7PSL | Field non lin | C712 2200µ 50v & C606 680µ 16v |