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Recap guide

Recap the Sega Dreamcast

Power supply caps are the headline risk (leaking or blown), plus motherboard and GD-ROM board caps. ConsoleMods says to recap the original supply rather than swap it.

Open the interactive checklist Tick off each capacitor as you replace it. It saves in your browser.

Worth a recap. Reports say it is a common and useful fix on this machine.

Which board do I have?

Boards changed during production. These notes come from the linked sources, and many are only partly documented, so check the board in front of you.

  • Motherboard VA0 (1998-1999) (Medium confidence). How to tell: Circled 0 to the left of the NTSC-U or PAL code on the sticker; BIOS chip MPR-21068; one log shows KATANA MAIN VA0 on the silkscreen. Capacitors: ConsoleMods gives no cap detail; hitmanmcc recapped the VA0 motherboard and optical drive board without values. Capacitor list differs from other revisions: not known. Source
  • Motherboard VA1 (1999-2000) (Medium confidence). How to tell: Circled 1 on the sticker; BIOS v1.01d chip MPR-21931; runs at 3.3V and is the most common NA and PAL revision. Capacitors: No cap detail found. Capacitor list differs from other revisions: not known. Source
  • Motherboard VA2 (Oct to Dec 2000) (Medium confidence). How to tell: Circled 2 on the sticker; drive microcontroller on the motherboard, 28 data pins and an orange ribbon cable. Capacitors: No cap detail found. Capacitor list differs from other revisions: not known. Source
  • PSU 171-7874B-X2, 171-7962A, 171-7962A-X1, 171-7970A (Medium confidence). How to tell: Power supply model number printed on the PSU board. Capacitors: ConsoleMods says these share one Console5 cap kit. Capacitor list differs from other revisions: yes. Source
  • PSU 171-7960 (220V) (Medium confidence). How to tell: Power supply model number printed on the PSU board. Capacitors: ConsoleMods says it needs its own 220V-specific cap kit. Capacitor list differs from other revisions: yes. Source
  • PSU 171-7874A, 171-7874A-X1, 171-7874B (Medium confidence). How to tell: Power supply model number printed on the PSU board. Capacitors: ConsoleMods says this group uses a different cap kit from group 1. Capacitor list differs from other revisions: yes. Source

Where to start

Clues from write-ups and forum threads, not a diagnosis. Low confidence means one thread or one repair; high means several write-ups agree.

  • Power supply caps (Medium confidence). ConsoleMods recommends recapping the original PSU, lists eight PSU revisions that each have a kit, and has a 68uF/400V C3 note for voltage conversion. Source
  • Identify your board (Medium confidence). ConsoleMods has a model differences page for telling VA0, VA1 and VA2 apart. It has no cap information. Source
  • Full recap log (Low confidence). One VA0 NTSC-J refurbishment log recaps the motherboard, PSU and optical drive board, with photos but no values. Source

Tips, tales and maybes

Found in write-ups and forum threads. These are other people's reports, not tested by us. Check part references and values against your own board.

  • Story: Black after a few seconds, PSU already recapped (Low confidence). One Dreamcast lost video 5 to 8 seconds after power-on even after the leaking PSU caps were replaced, and the cure was a 10k resistor between the 5V and RPM wires of a low-draw replacement fan. The poster's theory was that the supply needs a minimum load. Source
  • Watch out: Reads only one game: not caps (Medium confidence). A Gigazine write-up of a Dreamcast that would only read Soul Calibur fixed it by adjusting the laser's variable resistor, from 720 ohms to 400 ohms, and replacing the dead ML2032 battery. It is a reminder that disc-read faults are not always capacitors. Source
  • Watch out: Do not touch the sealed laser pot (Low confidence). A RacketBoy poster who damaged the laser potentiometer while trying to adjust it lost all disc reading. It is sealed under red epoxy, and the options discussed afterward were GDEMU, a laser assembly or USB-GDROM. Source
  • Story: Laser or recap? (Low confidence). A skilled r/dreamcast poster (seen on the lr.in.psf.lt mirror) noticed suspect caps on the drive board and asked whether to replace the laser or recap first, to avoid fitting a new laser and having the same fault. No replies were captured. Source

Before you start

  • Boards changed during production. Check your board number against the guides before you order parts.
  • A mains power supply can hold a dangerous charge. If you are not trained to work on one, have a professional do it.

Guides we used

This page and the interactive bench are built from these. They have the photos and the full detail, so please read them and support their authors.

The capacitor list

We have not checked a capacitor list for this machine yet, so none is shown. Follow the guide above for your board, then add the capacitors in the interactive checklist and it builds a shopping list for you.

Skip the sourcing

While you are in there

Affiliate links. As an Amazon Associate I earn from qualifying purchases. These links only search by name. Disclosure

Steps, tools and safety

The steps, the tools in top, middle and budget picks, and the safety list are the same for every machine, so they live on one page: How to recap, step by step.

Values are shown as published in the guides above, and boards changed during production. Check the board in front of you. A recap involves hot tools and, on some machines, dangerous voltages. You do it at your own risk.

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