Repair Tips From Japan CS centre
| Model | Block | Function | Symptoms | Cause | Repair performed |
|---|---|---|---|---|---|
| MZ-R50 | #25 | Main Board | KEy-work of Set Unstable (HOlD indicated when not at HOlD) | RB804 Cold Solder | Re-solder RB804 |
| MZ-R50 | #25 | Main Board | No Playback | l511 | Replace l511 |
| MZ-R50 | #25 | Main Board | No Power on Using AC ADP | lF901 Cold Solder | Re-solder lF901 |
| MZ-R50 | #25 | Main Board | No Playback | CN501 Poor Contact | Replace CN501 |
| MZ-R50 | #25 | Main Board | Stuck while Using Rechargeable Buttery | IC505 Failure | Replace IC |
| MZ-R50 | MD Section | OP | No Playback | OP Plastic Cylinder Mounted in Photo Detector Is Cracked | Replace OP Block |
| MZ-R50 | #17 | Motor Flexible Board | No Playback | Motor Flexible Board Disconnected | Replace Motor Flexible Board |
| MZ-R50 | #25 | Power Board | No Power & "lOW BAtt" indicated | CN805 Delaminated | Re-solder CN805 |
| MZ-R50 | MD Section | OP | No Recording | OP, laser Excessive Voltage | Replace OP Block |
| MZ-R50 | #25 | Power Board | No Playback | Q805 Short-circuit | Replace Q805 |
| MZ-R50 | #17 | JOG SW Unit with Dial | Mis-operation of Control Button | SW Unit Failure | Replace Switch Unit |
| MZ-R50 | #25 | Power Board | DISPlAy & MODE Button Unavailable | SW Board Cold Solder | Re-solder |
| MZ-R50 | #25 | Power Board | No Playback | Q805 Short-circuit | Replace Q805 |
| MZ-R50 | MD Section | Holder /Chassis | lid Unopened & Disc Remains Stuck | Chassis Slide lever is Run Aground lOCK Part of Holder (Set is Greatly Shocked by Dropping etc) | Remove Holder from Running Aground after Removing ClV Board & Stepping Motor and then Sliding aside Chassis lever |
| MZ-R50 | Mounted circuit board | Main board | Playback does not stop after opening the lid. (Spindle Motor Motor remains rotating.) | RB804 cold solder | Resolder RB804 |
| MZ-R50 | Mounted circuit board | Main board | lid does not open. | RB802 cold solder | Resolder RB802 |
| MZ-R50 | Mounted circuit board | Main board | Misoperation in JOG dial | RB802 cold solder | Resolder RB802 |
| MZ-R50 | Mounted circuit board | Main board | Disc Error (No playng back, Rotation of Spindle Motor(ClV) is unlocked and unstable.) | RB802 cold solder | Resolder RB802 |
| MZ-R50 | Mounted circuit board | Main board | DBB switch does not work. | RB805 cold solder | Resolder RB805 |
| MZ-R50 | Mounted circuit board | Main board | Stuck at "test Mode" | RB806 cold solder | Resolder RB806 |
| MZ-R50 | Mounted circuit board | Main board | JOG dial is uncontrollable when pushing the JOG dial. | RB806 cold solder | Resolder RB806 |
| MZ-R50 | Flexible board | - | Playback is occasionally suspended. (lid unopen. or no recording) | MD flexible board is scraped and short-circuited with the main chassis. | Replace MD flexible board (or stick protection sheet to the scraped part of the flexible board) |