ACT apricot - DC Supply Distribution; Fuse Rating

SYSTEM UNIT
The power supply unit is of switched mode design,
providing
regulated outputs of + 12V, +SV and-12V for use
by the System Board, the Keyboard, the disk drives, the
Display Unit and any expansion boards fitted. The power
supply
components are housed in a shielded case. A fuse is
located
in the mains input line, internally within the unit.
DC Supply Distribution
The regulated outputs from the PSU are supplied to the
System Board via a 7-wire cable assembly, terminated at
both ends in Molex connectors. The PSU provides two
separate regulated supplies of + 12V, a single regulated
supply of
+SV and a single regulated supply of -12V. The
maximum current rating for the four supplies are detailed
below.
The "V" prefix corresponds to a pin/number of pins
on thePSUDC connector.
VI (+SV supply)
6.0A
V2 (+ 12V supply) l.SA
V3 (+12Vsupply) 2.1A
V4 (-12V supply) O.2SA
Distribution of the supplies from the System Board to the
other areas are via the board wiring to the appropriate
connector.
The board provides:
1. + 12V to the Display Unit via the Display Unit
connector.
2. + 12V
and -12V to the Keyboard via the Keyboard
connector.
3. + 12V,
+SV and -12V to the expansion connectors.
4. + 12V
and +SV to the disk drive(s) via Molex
connectors and 4-wire cable assemblies.
Fuse rating
The rating of the fuse on the rear panel of the System Unit
is dependent on the mains input voltage, as detailed below.
240V mains input - T 2A, 20 mm slow blow.
11SVmains input- T 3A, 20 mm slow blow.