Acorn Archimedes A3000 Capacitor Guide: Difference between revisions
PSU: permit safe servicing/recap of the mains PSU for restoration; strengthen lethal-shock warnings and discharge procedure (replaces exchange-only/do-not-open wording) |
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This guide lists the capacitors on the '''[[Acorn Archimedes A3000]]''' main PCB and covers the recap. The values, designators and Acorn part numbers come directly from the [[Acorn A3000 Service Manual]] PCB assembly parts list.<ref name="sm">[[Acorn A3000 Service Manual]], Acorn Computers — hosted on this wiki. PCB assembly parts list: capacitor designators C1–C91, values, types ("ALEC" aluminium electrolytic, "TANT" tantalum, "DCPLR" SMD ceramic decoupler, "CPLT" plate ceramic) and Acorn part numbers; also the PSU output spec and mains-hazard warning.</ref> | This guide lists the capacitors on the '''[[Acorn Archimedes A3000]]''' main PCB and covers the recap. The values, designators and Acorn part numbers come directly from the [[Acorn A3000 Service Manual]] PCB assembly parts list.<ref name="sm">[[Acorn A3000 Service Manual]], Acorn Computers — hosted on this wiki. PCB assembly parts list: capacitor designators C1–C91, values, types ("ALEC" aluminium electrolytic, "TANT" tantalum, "DCPLR" SMD ceramic decoupler, "CPLT" plate ceramic) and Acorn part numbers; also the PSU output spec and mains-hazard warning.</ref> | ||
== | == Safety == | ||
The A3000 contains a mains-powered switch-mode PSU. '''Disconnect the mains lead before opening the case.''' Board-level capacitor work is low voltage once the supply is disconnected, but the PSU module itself carries mains-side capacitors that can hold charge — treat the PSU module with the same caution as any mains switch-mode supply (see the PSU section below). | The A3000 contains a mains-powered switch-mode PSU. '''Disconnect the mains lead before opening the case.''' Board-level capacitor work is low voltage once the supply is disconnected, but the PSU module itself carries mains-side capacitors that can hold charge — treat the PSU module with the same caution as any mains switch-mode supply (see the PSU section below). | ||