| Make | Model | Problem | Solution | Date |
| | | |
| Found: 901
|
| Hitachi | G7PSMK2 | Dead - HT low 45v. | Change C910 , C914 , C916 , C929 | 14-09-04 |
| Hitachi | G7PSMK2 | Int frame collapse. | Drys on frame IC & LOPT. | 14-09-04 |
| Hitachi | G7PSMK2 | Standby only. | R902 ( 82k ) o/c. | 14-09-04 |
| 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 | 14-09-04 |
| 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) | 14-09-04 |
| Hitachi | G8Q | Blank raster &/or line twitch | C933 2200µ & C937 1µ in 12v reg cct | 14-09-04 |
| Hitachi | G8Q | Blank raster, can't tune chans & front controls operate different functions | Reprog memory chip IC502 | 14-09-04 |
| Hitachi | G8Q | Blank raster/no sound/tuning/front display distorted | Micro reqs reprog - see separate article | 14-09-04 |
| 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 | 14-09-04 |
| Hitachi | G8Q | Bright white pic with no sound | IC952 12v reg o/p down to 9.5v - reg u/s | 14-09-04 |
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| Hitachi | G8Q | Bright white raster | C720 4µ7 in RGB supply o/c | 14-09-04 |
| Hitachi | G8Q | Bright white screen | Dry joint C711 due to pressing on back cover | 14-09-04 |
| Hitachi | G8Q | Buzz on sound | IC201 TA8691N chip reqs replacement | 14-09-04 |
| Hitachi | G8Q | Buzz on sound even with vol right down | TA8691N - ord code 19869A WVE | 14-09-04 |
| Hitachi | G8Q | Channel tuning problems | IC1502 MDA2062 memory chip | 14-09-04 |
| Hitachi | G8Q | Dark pic | A1 control (part of LOPTx) faulty, R881 470k high or C881 10nf leaky | 14-09-04 |
| Hitachi | G8Q | dead | ZD901 27v zener s/c | 14-09-04 |
| Hitachi | G8Q | Dead | No activity around SAA1293H control chip - X1501 4Mhz Xtal faulty | 14-09-04 |
| Hitachi | G8Q | Dead | RU2M 20v supply rect s/c & LA4270 audio o/p chip blown | 14-09-04 |
| Hitachi | G8Q | dead - comes on eventually if on/off sw held in | volts across C908 gradually increases - TH902 thermistor hi res (approx 2M) remove & clean or replace (better) | 14-09-04 |
| Hitachi | G8Q | Dead - fuse FS901 o/c. | Drys T901 , check Q902 , ZD901 , OC941 , ZD941 , Q941/2 , D905 | 14-09-04 |
| Hitachi | G8Q | Dead - fuse o/c. | Change all transistors/diodes in PSU. | 14-09-04 |
| Hitachi | G8Q | Dead - fuse shattered | Degaussing therm, Q902 s/c, ZD901 27v zener s/c, D903 leaky, IC901 UC3844 chopper chip sus & ZD902 | 14-09-04 |
| Hitachi | G8Q | Dead - HT present - no line drive | St/by line from micro 3.5v (should be 8-12v on , 0v in st/by) D1504 1N4148 in st/by cct faulty | 14-09-04 |
| Hitachi | G8Q | Dead - intermittently. | Drys on T901 , D933 or LOPTX. | 14-09-04 |
| Hitachi | G8Q | Dead - no line drive | Timebase chip TDA2579 faulty - no line drive o/p at pin 11 | 14-09-04 |
| Hitachi | G8Q | Dead - no PSU operation | D907 BYV10-40 s/c also check UC3844 & Q901/2 | 14-09-04 |
| Hitachi | G8Q | Dead - went off with abang | TH902, also check Q901, Q902, ZD901, ZD903, D905, D907, D908 IC901, C908 , R910 & check print | 14-09-04 |
| Hitachi | G8Q | Dead after smoking | C715 in E-W cct dry joints | 14-09-04 |
| Hitachi | G8Q | Dead apart from chan no. | 12v supply only 5v - C933 2200µ 25v | 14-09-04 |