Editing Acorn 6502 Second Processor (section)

== Capacitors ==

There are only three polarised capacitors in the unit:<ref name="sm" />

{| class="wikitable styled-table" style="width:100%; text-align:center;"
|+'''Polarised capacitors (service manual pp. 35 and 37)'''
! Board !! Ref !! Value !! Type
|-
| Power supply || C1 || 4700 µF 16 V || Aluminium electrolytic, reservoir
|-
| Power supply || C5 || 47 µF 35 V || Aluminium electrolytic, output
|-
| Main board || C3 || 10 µF 10 V || Tantalum (Acorn part 610,010)
|}

The other main board capacitors are ceramics: C4 to C28 are decouplers (Acorn part 680,002, 33 nF or 47 nF on the circuit diagram), C29 33 nF (the timing capacitor for the reset monostable IC26; the transcribed parts list prints 33 pF against Acorn part 637,333), C30 100 nF, C1 10 nF and C2, C31 to C33 33 pF.<ref name="sm" /><ref name="cct" /> Replace C1 and C5 if the supply shows ripple or will not hold 5 V into the 10 ohm test load. See [[Capacitor Failure Symptoms]].