Editing Amstrad PC 2386 Service Manual (section)

== What it covers ==

The specification on page 2 gives an 80386 at 20&nbsp;MHz with 0.05 wait states, 32-bit memory, an 80387 socket, 4&nbsp;MB of parity-checked RAM, a 64K 35&nbsp;ns cache, five 16-bit expansion slots, 1.4&nbsp;MB floppy drives, a 65&nbsp;MB hard disc option, Hercules/CGA/EGA/VGA-compatible video, built-in LIM 4.0, and MS-DOS 4.0 with Windows/386. The system unit measures 415 × 160 × 485&nbsp;mm.

The alignment instructions (p. 3) are for the power supply and the clocks:

{| class="wikitable styled-table" style="width:80%; text-align:left;"
|+'''PC2386 alignment (p. 3)'''
! Step !! Method
|-
| +5&nbsp;V || Voltmeter at test point A; set VR604 to 5.00&nbsp;V ±0.05&nbsp;V
|-
| +12&nbsp;V || Voltmeter at test point B; set VR603 to 12.00&nbsp;V ±0.05&nbsp;V
|-
| VCO control voltage || Voltmeter at pin 6 of IC316; set TC301 to 3.5&nbsp;V
|-
| Primary protection || Turn VR601 anticlockwise until the protection starts to cut in, then back a little
|-
| Real-time clock || Timing meter at pin 21 of IC115, 0.2&nbsp;s/day setting; set TC101 to read 0.00
|}

The notes to engineers (p. 2) forbid component-level repair of the main CPU PCB, which is to be replaced once a fault is confirmed, and of the floppy and hard disc drives; "PSU & Monitors are subject to component level repairs." The safety tests are a 1.5&nbsp;kV RMS flash test for 3&nbsp;s, an insulation test requiring more than 4&nbsp;MΩ and a mains-lead earth continuity of no more than 0.5&nbsp;Ω.