Commodore 64 Capacitor Replacement Guide: Difference between revisions
Rewrite from Commodore's own service manual parts lists: previous values (C88 4700uF/16V, C90 1000uF/16V, C91 470uF/25V) matched no Commodore list and under-specified voltage ratings. Banner removed; page now fully cited. |
Point citations at the existing service manual page rather than the duplicate |
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Recapping a '''[[Commodore 64]]''' restores stable supply rails, reduces heat stress on the MOS custom chips and cures a specific family of warm-up faults that Commodore itself documented. | Recapping a '''[[Commodore 64]]''' restores stable supply rails, reduces heat stress on the MOS custom chips and cures a specific family of warm-up faults that Commodore itself documented. | ||
'''Every value on this page is taken from Commodore's own parts lists''' 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 | '''Every value on this page is taken from Commodore's own parts lists''' 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]]. Component-level parts lists give capacitance, voltage rating, tolerance and Commodore part number for every capacitor on each mainboard revision, and the manual carries Commodore's own symptom-to-component troubleshooting table.</ref> Cross-check against your own board's silkscreen before ordering — Commodore changed values between revisions, and boards were built with substitutions. | ||
== ⚠️ A correction == | == ⚠️ A correction == | ||
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== Which board do you have? == | == Which board do you have? == | ||
The assembly number is silkscreened on the board. Commodore's own cross-reference:<ref name="sm">Commodore Business Machines, C64 / C64C Service Manual, March 1992, hosted at [[Commodore | The assembly number is silkscreened on the board. Commodore's own cross-reference:<ref name="sm">Commodore Business Machines, C64 / C64C Service Manual, March 1992, hosted at [[Commodore 64 / 64C Service Manual]]. Component-level parts lists give capacitance, voltage rating, tolerance and Commodore part number for every capacitor on each mainboard revision, and the manual carries Commodore's own symptom-to-component troubleshooting table.</ref> | ||
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|+'''326298-01 electrolytics'''<ref name="sm">Commodore Business Machines, C64 / C64C Service Manual, March 1992, hosted at [[Commodore | |+'''326298-01 electrolytics'''<ref name="sm">Commodore Business Machines, C64 / C64C Service Manual, March 1992, hosted at [[Commodore 64 / 64C Service Manual]]. Component-level parts lists give capacitance, voltage rating, tolerance and Commodore part number for every capacitor on each mainboard revision, and the manual carries Commodore's own symptom-to-component troubleshooting table.</ref> | ||
! Ref !! Value !! Rating !! Tolerance !! Function | ! Ref !! Value !! Rating !! Tolerance !! Function | ||
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{| class="wikitable styled-table" style="width:100%; text-align:left;" | {| class="wikitable styled-table" style="width:100%; text-align:left;" | ||
|+'''250407-04 electrolytics'''<ref name="sm">Commodore Business Machines, C64 / C64C Service Manual, March 1992, hosted at [[Commodore | |+'''250407-04 electrolytics'''<ref name="sm">Commodore Business Machines, C64 / C64C Service Manual, March 1992, hosted at [[Commodore 64 / 64C Service Manual]]. Component-level parts lists give capacitance, voltage rating, tolerance and Commodore part number for every capacitor on each mainboard revision, and the manual carries Commodore's own symptom-to-component troubleshooting table.</ref> | ||
! Ref !! Value !! Rating !! Tolerance !! Function | ! Ref !! Value !! Rating !! Tolerance !! Function | ||
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{| class="wikitable styled-table" style="width:100%; text-align:left;" | {| class="wikitable styled-table" style="width:100%; text-align:left;" | ||
|+'''250425-01 electrolytics'''<ref name="sm">Commodore Business Machines, C64 / C64C Service Manual, March 1992, hosted at [[Commodore | |+'''250425-01 electrolytics'''<ref name="sm">Commodore Business Machines, C64 / C64C Service Manual, March 1992, hosted at [[Commodore 64 / 64C Service Manual]]. Component-level parts lists give capacitance, voltage rating, tolerance and Commodore part number for every capacitor on each mainboard revision, and the manual carries Commodore's own symptom-to-component troubleshooting table.</ref> | ||
! Ref !! Value !! Rating !! Tolerance !! Function | ! Ref !! Value !! Rating !! Tolerance !! Function | ||
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=== 250466-01 — C64-B3 === | === 250466-01 — C64-B3 === | ||
Commodore part numbers are given here because this list prints them.<ref name="sm">Commodore Business Machines, C64 / C64C Service Manual, March 1992, hosted at [[Commodore | Commodore part numbers are given here because this list prints them.<ref name="sm">Commodore Business Machines, C64 / C64C Service Manual, March 1992, hosted at [[Commodore 64 / 64C Service Manual]]. Component-level parts lists give capacitance, voltage rating, tolerance and Commodore part number for every capacitor on each mainboard revision, and the manual carries Commodore's own symptom-to-component troubleshooting table.</ref> | ||
{| class="wikitable styled-table" style="width:100%; text-align:left;" | {| class="wikitable styled-table" style="width:100%; text-align:left;" | ||
|+'''250466-01 electrolytics'''<ref name="sm">Commodore Business Machines, C64 / C64C Service Manual, March 1992, hosted at [[Commodore | |+'''250466-01 electrolytics'''<ref name="sm">Commodore Business Machines, C64 / C64C Service Manual, March 1992, hosted at [[Commodore 64 / 64C Service Manual]]. Component-level parts lists give capacitance, voltage rating, tolerance and Commodore part number for every capacitor on each mainboard revision, and the manual carries Commodore's own symptom-to-component troubleshooting table.</ref> | ||
! Ref !! Value !! Rating !! Package !! Commodore part no. | ! Ref !! Value !! Rating !! Package !! Commodore part no. | ||
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== Commodore's own capacitor-related faults == | == Commodore's own capacitor-related faults == | ||
The service manual's troubleshooting table names capacitors directly for two symptoms. Both are worth knowing before you assume a chip has failed:<ref name="sm">Commodore Business Machines, C64 / C64C Service Manual, March 1992, hosted at [[Commodore | The service manual's troubleshooting table names capacitors directly for two symptoms. Both are worth knowing before you assume a chip has failed:<ref name="sm">Commodore Business Machines, C64 / C64C Service Manual, March 1992, hosted at [[Commodore 64 / 64C Service Manual]]. Component-level parts lists give capacitance, voltage rating, tolerance and Commodore part number for every capacitor on each mainboard revision, and the manual carries Commodore's own symptom-to-component troubleshooting table.</ref> | ||
{| class="wikitable styled-table" style="width:100%; text-align:left;" | {| class="wikitable styled-table" style="width:100%; text-align:left;" | ||
|+'''Symptoms Commodore attributes to capacitors'''<ref name="sm">Commodore Business Machines, C64 / C64C Service Manual, March 1992, hosted at [[Commodore | |+'''Symptoms Commodore attributes to capacitors'''<ref name="sm">Commodore Business Machines, C64 / C64C Service Manual, March 1992, hosted at [[Commodore 64 / 64C Service Manual]]. Component-level parts lists give capacitance, voltage rating, tolerance and Commodore part number for every capacitor on each mainboard revision, and the manual carries Commodore's own symptom-to-component troubleshooting table.</ref> | ||
! Symptom !! Commodore's check | ! Symptom !! Commodore's check | ||
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