Marty:PSU Repair Guide
First of all Marty was originally designed to use 100V in Japan. You can use it in a 120V country with a 20% overvoltage but for long term use it isn't recommended. It is recommended for long term use for Marty to use a stepdown converter to 100V. You have been warned.
Marty uses two different power supplies depending on the model. One Tamura brand and one Eastern brand.
| Number | Microfarad | Voltage |
|---|---|---|
| C5 | 100uf | 200v |
| C6 | 100uf | 200v |
| C7 | 4.7uf | 400v |
| C13 | 680uf | 16v |
| C14 | 120uf | 16v |
| C15 | 1800uf | 10v |
| C16 | 1800uf | 10v |
| C17 | 120uf | 16v |
| C18 | 100uf | 35v |
| C19 | 47uf | 35v |
Generally with Tamura, all of the capacitors on the left side of the PSU card, or C13 onwards, are the major points of failure.
Eastern PSU
That isn't glue. Capacitors started to vent downward.
| Number | Microfarad | Voltage |
|---|---|---|
| C? (Can't read on PCB) | 180uf | 200v |
| C8 | 1uf | 50v |
| C21 | 470uf | 16v |
| C22 | 470uf | 16v |
| C23 | 680uf | 10v |
| C24 | 680uf | 10v |
| C25 | 680uf | 10v |
| C26 | 680uf | 10v |
| C27 | 120uf | 25v |
| C28 | 120uf | 25v |
| C32 | 4.7uf | 35v |
For Eastern power supply the main points of failure are again the capacitors on the left side of the card.
Marty PSU in good condition Under correct condition operating at 100V you should have voltages in this range on the output connecting to Marty:
- 1 +5V
- 2 +5V
- 3 +9V
- 4 +9V
- 5 -9V
- 6 GND
- 7 GND
- 8 GND
With GND wires being black, blue is -9V, orange 9V and red as 5V. If you're edgy and connect directly to 120V, it should be around 20% higher. Marty PSU wasn't regulated unlike something like a Sega Saturn or Sega Dreamcast.
It's also recommended to open Marty first to determine what PSU card yours has as some swaps could happen before ordering capacitors.