Editing Commodore 64C Capacitor Replacement Guide

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Recapping a '''[[Commodore 64C]]''' — and any [[Commodore 64]] built on the '''250469 "short board"''' — restores stable supply rails and removes a common source of audio and video noise.

'''Every value on this page is taken from Commodore's own parts list''' for PCB assembly 250469-01 in the [[Commodore C64 Service Manual|C64 / C64C Service Manual]] (March 1992).<ref name="sm">Commodore Business Machines, ''C64 / C64C Service Manual'', March 1992, hosted at [[Commodore 64 / 64C Service Manual]]. Parts list for PCB assembly 250469-01 (C64-E), giving capacitance, voltage rating, package and Commodore part number for every capacitor on the short board.</ref>

== Which board is this? ==

The '''250469''' short board is the one used in the C64C slim case, and in late "bread bin" machines. The assembly number is silkscreened on the board. For the earlier long boards — 326298, 250407, 250425 and 250466 — see [[Commodore 64 Capacitor Replacement Guide]], which lists a different and non-overlapping set of parts.

== Electrolytic capacitors — 250469-01 ==

{| class="wikitable styled-table" style="width:100%; text-align:left;"
|+'''250469-01 (C64-E / 64C) electrolytics'''<ref name="sm">Commodore Business Machines, ''C64 / C64C Service Manual'', March 1992, hosted at [[Commodore 64 / 64C Service Manual]]. Parts list for PCB assembly 250469-01 (C64-E), giving capacitance, voltage rating, package and Commodore part number for every capacitor on the short board.</ref>
! Ref !! Value !! Rating !! Package !! Commodore part no.
|-
| '''C63''' || 1000 µF || 16 V || Axial || 900101-52
|-
| '''C63''' ''(second entry — see note)'' || 2200 µF || 16 V || Axial || 900101-33
|-
| '''C66''' || 470 µF || 35 V || Radial || 900301-35
|-
| '''C43''' || 220 µF || 16 V || Radial || 900100-18
|-
| '''C65''' || 220 µF || 25 V || Radial || 900100-03
|-
| '''C58''' || 100 µF || 16 V || Radial || 900100-40
|-
| '''C36''' || 47 µF || 16 V || Radial || 900100-33
|-
| '''C44''' || 22 µF || 50 V || Radial || 251079-06
|-
| '''C77''' || 10 µF || 25 V || Radial || 900100-01
|-
| '''C59''' || 4.7 µF || 25 V || Radial || 900100-11
|}

'''Note on C63.''' Commodore's printed parts list for this assembly contains '''two entries for C63''' — 1000 µF 16 V (900101-52) and 2200 µF 16 V (900101-33).<ref name="sm">Commodore Business Machines, ''C64 / C64C Service Manual'', March 1992, hosted at [[Commodore 64 / 64C Service Manual]]. Parts list for PCB assembly 250469-01 (C64-E), giving capacitance, voltage rating, package and Commodore part number for every capacitor on the short board.</ref> This wiki has not been able to determine whether that reflects a running change or an error in the manual. '''Read the value off your own board and fit like for like'''; either part is physically and electrically reasonable in that position, and the higher value will not do harm.

== What is not an electrolytic on this board ==

Worth stating plainly, because the previous version of this page got it wrong:<ref name="sm">Commodore Business Machines, ''C64 / C64C Service Manual'', March 1992, hosted at [[Commodore 64 / 64C Service Manual]]. Parts list for PCB assembly 250469-01 (C64-E), giving capacitance, voltage rating, package and Commodore part number for every capacitor on the short board.</ref>

{| class="wikitable styled-table" style="width:80%; text-align:left;"
! Ref !! What it actually is
|-
| C2–C4, C6, C76, C90 || Ceramic, 470 pF 50 V
|-
| C74 || Ceramic, 1000 pF 50 V
|-
| C80, C81 || Ceramic, 1800 pF 50 V / 2200 pF 25 V depending on the list
|-
| C86–C88 || Ceramic, 220 pF 50 V
|-
| C94 || Ceramic, 150 pF 50 V
|-
| C70, C71 || Ceramic, 22000 pF
|-
| C1, C7, C28–C30 || Ceramic, 0.1 µF 25 V
|}

Ceramics of this type do not age the way aluminium electrolytics do and are not part of a routine recap.

== Before you start ==

* '''Work from your own board's silkscreen.''' The assembly number tells you which list applies; the board itself is the final authority.
* Anti-static precautions throughout. The 8500, 8565/8562 VIC-II, 8580 SID and the Super PLA are the parts you cannot casually replace.
* See [[Capacitor Failure Symptoms]] for recognising a failed part and [[Recommended Tools]] for the workshop kit.

== Related pages ==

* [[Commodore 64C]] · [[Commodore 64C General Maintenance]] · [[Commodore 64]] · [[Commodore 64 Capacitor Replacement Guide]]
* '''[[Commodore C64 Service Manual]]''' — the source for every value on this page
* [[Capacitor Failure Symptoms]] · [[Recommended Tools]]

== References ==

<references />

[[Category:Commodore Systems]]
[[Category:Capacitor Replacement Guides]]