| Make | Model | Problem | Solution | Date |
| | | |
| Found: 901
|
| Hitachi | G7/8QP | Low sound with buzzing | C410 ( 0.01uF ) Between MF402 & chassis | 14-09-04 |
| Hitachi | G7/8QP | NO ON SCREEN DISPLAY | R008 470k OC. OR DRY | 14-09-04 |
| Hitachi | G7/8QP | Screen goes very bright then trips. | C711 ( 47u f ) | 14-09-04 |
| Hitachi | G7/8QP | SET APPEARS DEAD BUT IS IN PROTECTION MODE AS HT T | R909 39k HIGH | 14-09-04 |
| Hitachi | G7/8QP | Set Dead H.T. high & tripping | Replace ZD903 & R909 ( 39K ) | 14-09-04 |
| Hitachi | G7/8QP | Sound cuts out every few mins | C711 D/J | 14-09-04 |
| Hitachi | G7/8QP | SOUND GREY RASTER WITH FLYBACK LINES OR SET TRIPS | C711 47uF 200v NEAR LOPT | 14-09-04 |
| Hitachi | G7/8QP | Sound ok only gray raster with line at top & botto | C711 ( 47uF ) | 14-09-04 |
| Hitachi | G7/8QP | Stuck in standby - 300v on BUT collector. | R902/3 ( 82k ) front L/H corner o/c. | 14-09-04 |
| Hitachi | G7/8QP | WHITE SCREEN | REFIT C171 | 14-09-04 |
|
|
| Hitachi | G7P | Bent verts at top when playing tapes | Try changing C104 to 22µ & C205 to 4µ7 - if this makes no difference, reduce C701 to 3n3 & C702 to 0µ47 50v (unofficial) | 14-09-04 |
| Hitachi | G7P | Black lines across screen & int field collapse | dry joints field o/p chip IC601 | 14-09-04 |
| Hitachi | G7P | COMES ON BRIGHT THEN TRIPS OFF | Q801 BC558 OR ZD804 9v1 | 14-09-04 |
| Hitachi | G7P | Crowbar operates aft 5 secs aft Loptx replacement | ZD703 faulty - measured ok out of cct | 14-09-04 |
| Hitachi | G7P | Cuts out aft half hour | Prot thy triggers due to Q704 BF432 leaky when warm | 14-09-04 |
| Hitachi | G7P | CUTS OUT INT | R919 920 100k | 14-09-04 |
| Hitachi | G7P | Dead | CHECK R901 ( 3R9 ) 7W C919 ( 4.7nF ) 1Kv AND C928 ( 2.2nF ) 2Kv R932 R931 ( 100K ) Q901 ( BUT11 ) D904 | 14-09-04 |
| Hitachi | G7P | Dead | CHECK DIODE ACROSS BASE EMITTER OF CHOPPER TRANSISTOR | 14-09-04 |
| Hitachi | G7P | dead | LOP tr 2SD1884 s/c - use correct type | 14-09-04 |
| Hitachi | G7P | Dead - HT low at 26v until LOP stage dis'd | D905 MPG06J leaky | 14-09-04 |
| Hitachi | G7P | Dead - mains fuse o/c - chopper tr s/c | Check R931 150k & R932 120k | 14-09-04 |
| Hitachi | G7P | Dead int & blows chopper tr | R932 220k to pin 4 TDA4601 hi res | 14-09-04 |
| Hitachi | G7P | DEAD SURGE LIMITER O/C 3R9 7W Q901 OK | C919 4n7 1kv SC | 14-09-04 |
| Hitachi | G7P | DEAD WITH ONLY 33v AT LINE OP. COLL. | CHECK MAIN SMOOTHING 150mfd 400v C909 | 14-09-04 |
| Hitachi | G7P | Dead/Int - blowing chopper transistor. | R932 gone high connected to pin 4 IC901. | 14-09-04 |
| Hitachi | G7P | Field collapse | Replace R719 o/c with wire link | 14-09-04 |
| Hitachi | G7P | Flashing pic - worse when tapped | IC703 9v reg dry joints (could not be seen) | 14-09-04 |
| Hitachi | G7P | Hum Bar | Slight adj of AGC preset | 14-09-04 |
| Hitachi | G7P | Int cuts out or dead | R919 & R920 100k feed pin 5 TDA4601 hi res | 14-09-04 |
| Hitachi | G7P | Int fails to start | Check C914 2µ2 50v, C916 33µ 25v | 14-09-04 |