| Make | Model | Problem | Solution | Date |
| | | |
| Found: 22
|
| Matsui | 1420A | Dead | C508 4µ7 50v | 14-09-04 |
| Matsui | 1420A | Dead | STR50103 power reg s/c, D508 (or 506 in some sets) R2M/60C s/c, dropper 5R6 5w possibly o/c | 14-09-04 |
|
|
| Matsui | 1420A | DEAD WITH STR50103 , SR2M AND 5.6ohm FAULTY | IF LINE STAGE IN DISTRESS AFTER REPLACING PROBABLY LOPT OR SCAN COILS | 14-09-04 |
| Matsui | 1420A | Dead. | C508 ( 4.7uf 50V ) | 14-09-04 |
| Matsui | 1420A | Distorted sound | R354 47k o/c | 14-09-04 |
| Matsui | 1420A | Int dead | Check for dry joints & C504 0µ047 o/c | 14-09-04 |
| Matsui | 1420A | Int field collapse | Cracks around LOPTx conns | 14-09-04 |
| Matsui | 1420A | INTERMITTENT FIELD SCAN | CHECK FOR CRACKS NEAR LOPTX NEAR R437 , D409 | 14-09-04 |
| Matsui | 1420A | No channel LEDs on or all channel LEDs on. | IC101 ( LA7940 ) | 14-09-04 |
| Matsui | 1420A | No colour | C608 0µ1 off pin 3 IC µPC1420 or chip faulty | 14-09-04 |
| Matsui | 1420A | No colour. | C608 ( 0.01uf ) off pin 3 IC uPC1420 , or the IC. | 14-09-04 |
| Matsui | 1420A | No line drive | Q401 2SC2271 line dr tr o/c & line dr tfrmr faulty | 14-09-04 |
| Matsui | 1420A | No luminance | DL601, D602, D602, D613 all 1N4148 | 14-09-04 |
| Matsui | 1420A | No luminance | D602, 603 & 613 1N4148 & check Q601 2SA733 | 14-09-04 |
| Matsui | 1420A | No luminance. | ( 1 ) DL601 , ( 2 ) D602/3/D613 ( 1N4148 ) | 14-09-04 |
| Matsui | 1420A | NO PIC OR SOUND FIELD 12V REG HOT | C436 | 14-09-04 |
| Matsui | 1420A | No sound/pic - EHT present - field collapse noticed when A1 advanced | 12v reg for IC401 overheating due to C436 470µ 16v s/c | 14-09-04 |
| Matsui | 1420A | None or all chan LEDs on | IC101 LA7940 | 14-09-04 |
| Matsui | 1420A | Tripping | R502 100k, R503 82k, dry joints line driver/output transfmr, LOPTx | 14-09-04 |
| Matsui | 1420A | Tripping. | ( 1 ) R502 ( 100k ) , R503 ( 82k ) , ( 2 ) Drys on LTB Tx & LOPTX , ( 3 ) LOPTX | 14-09-04 |
| Matsui | 1420A 1440A | DARK TO LIGHT SHADING ACROSS PIC | C431 ( 4.7UF ) IN RGB STAGE | 14-09-04 |
| Matsui | 1420A/1440A | Dark to light shading across pic or int bright | C431 4µ7 in RGB supply | 14-09-04 |