Marty:PSU Repair Guide: Difference between revisions
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First of all Marty was originally designed to use '''100V''' in Japan. | 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. | Marty uses two different power supplies depending on the model. One Tamura brand and one Eastern brand. | ||
== Tamura PSU == | |||
Generally with Tamura, all of the capacitors on the left side of the PSU card, or C13 onwards, are the major points of failure. | |||
{| class="wikitable" | {| class="wikitable" | ||
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|} | |} | ||
== Eastern PSU == | |||
Eastern PSU | |||
For Eastern power supply the main points of failure are again the capacitors on the left side of the card. | |||
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<gallery> | |||
Eastern PSU Card.png|Eastern PSU | |||
Eastern Leaking Secondary Side.png|That isn't glue. Capacitors started to vent downward. | |||
</gallery> | |||
== Proper Operation == | |||
Marty PSU in good condition '''Under correct condition operating at 100V''' you should have voltages in this range on the output connecting to Marty: | Marty PSU in good condition '''Under correct condition operating at 100V''' you should have voltages in this range on the output connecting to Marty: | ||
| Line 83: | Line 88: | ||
* 8 GND | * 8 GND | ||
With GND wires being black, blue is -9V, orange 9V and red as 5V. | 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. | It's also recommended to open Marty first to determine what PSU card yours has as some swaps could happen before ordering capacitors. | ||
== Capacitor Kits == | |||
Console5 has capacitor kits available for both Marty power supplies. It is recommended if you just purchased Marty '''to open it so you can order the proper power supply capacitor kit as they're quite different and not interchangable in terms of capacitors.''' | |||
* https://console5.com/store/fujitsu-fm-towns-marty-power-supply-cap-kit-eastern.html | |||
* https://console5.com/store/fujitsu-fm-towns-marty-power-supply-cap-kit-tamura.html | |||
Latest revision as of 04:59, 29 July 2022
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.
Tamura PSU
Generally with Tamura, all of the capacitors on the left side of the PSU card, or C13 onwards, are the major points of failure.
| 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 |
Eastern PSU
For Eastern power supply the main points of failure are again the capacitors on the left side of the card.
| 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 |
Eastern PSU
That isn't glue. Capacitors started to vent downward.
Proper Operation
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.
Capacitor Kits
Console5 has capacitor kits available for both Marty power supplies. It is recommended if you just purchased Marty to open it so you can order the proper power supply capacitor kit as they're quite different and not interchangable in terms of capacitors.