WhitakerAudio JC Whitaker 20 W Stereo Integrated Audio Amplifier, Manual

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WhitakerAudio
3.3 Power Management Module
The power management PWB mounts at the rear of the chassis and is inverted, relative to the
other boards; the component side faces the chassis deck. This is a space-saving technique. The
system is contained on a single PWB that interfaces with other boards in the amplifier.
Connection details are given in Table 3.6.
Table 3.6 Power Management Module PWB Connection Wiring Codes
PWB Code Function Connection Color Code Notes
GND Ground Black Chassis/circuit ground (2 avail-
able). Tie one to main ground
point.
ACneutral AC power neutral White Connects to ac line filter FL51
neutral terminal
LoadN Amplifier load neutral White Connects to ac neutral for
amplifier board #1 (N-1)
AChot AC power hot Black Connects to ac line filter FL51
hot terminal
Switch1 Front panel power switch Black Connects to front panel power
switch, SW51
Switch2 Front panel power switch Black Connects to front panel power
switch, SW51
LoadH Amplifier load hot Black Connects to ac hot for amplifier
board #1 (Hot-1)
SW203 Temperature sensor White Connects to chassis-mounted
temperature sensor, SW203
SW203 Temperature sensor White Connects to chassis-mounted
temperature sensor, SW203
B+ Sense B+ voltage sense input White Connects to B+ supply on
amplifier board #2
V+ +40 V dc (approx.) source
when unloaded
Yellow Connects to main preamplifier
board V+ input
V+HV +40 V dc (approx.) source
when unloaded; switched
on by B+ Good condition.
CONN201 Timer reset Yellow Connects to timer reset switch,
SD201, if used
Timer reset Yellow Connects to timer reset switch,
SW201, if used
Auto-off enable Yellow Connects to front panel auto-
off switch, SW202
Auto-off enable Yellow Connects to front panel auto-
off switch, SW202