Editing Acorn Archimedes A3000 Capacitor Guide (section)

== Checks after recapping ==

# Measure the +5 V rail. Acorn's specification is 4.9-5.1 V, with ripple and noise up to 50 mV peak to peak.<ref name="sm-psu">Acorn Computers, ''A3000 Service Manual'', part 0480,050, issue 1, September 1989, p. 19 (power supply performance). Hosted on this wiki as [[Acorn A3000 Service Manual]].</ref>
# Check that the machine reaches the desktop, then test sound through the speakers and headphones, a floppy read, and the printer port if it is used.
# Run Acorn's functional tests from the service manual if a test disc is available (pp. 36-43).
# If a function that worked before the recap now fails, check the polarity of the parts in that area first.

After refitting or replacing an assembly, Acorn requires an earth continuity test on the assembled computer, between the mains plug earth pin and the expansion-card fixing screws and printer-port fixing bolts (pp. 33 and 45; Appendix B, p. 57).