Marty:PSU Repair Guide: Difference between revisions

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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.'''
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.
Marty uses two different power supplies depending on the model. One Tamura brand and one Eastern brand.


== Tamura PSU ==
== Tamura PSU ==
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* 8 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.
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.
Line 94: Line 94:
== Capacitor Kits ==  
== 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.'''
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-eastern.html
* https://console5.com/store/fujitsu-fm-towns-marty-power-supply-cap-kit-tamura.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.

Tamura Power Supply
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.


Eastern Power Supply
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



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.