Editing Sinclair ZX Spectrum +2 Capacitor Replacement Guide (section)

== Post-recap verification ==

# Power up on a '''current-limited supply''' set to about 1.5 A. A healthy +2 draws roughly 800 mA–1.2 A; immediate current limiting means a short, not a capacitor problem.<ref name="tyne">Tynemouth Software, [http://blog.tynemouthsoftware.co.uk/2017/06/spectrum-128k-2-grey-repairs.html "Spectrum 128K +2 Grey Repairs"]. Source for typical current draw and diagnostic practice.</ref>
# Confirm the 128 menu appears.
# Check the rails: +5 V, +12 V, −12 V and −5 V.
# Verify the clocks are clean and jitter-free: 17.73447 MHz at IC37 pin 6 and 3.54689 MHz at IC2 pin 6.<ref name="sm128" />
# Test AY sound and the beeper, a tape load and save, both joystick ports and the full keyboard.

If a previously-working function fails after the recap, check the polarity of every replaced electrolytic first.