Atari Tempest - Page 33

Tempest™
The
Regulator/Audio
II PCB
performs
three func-
tions:
1)
it
regulates
the
voltages
from the
power
supply to
±5
VDC,
2)
it
rectifies
and
filters ±22
VDC,
and
3)
it
amplifies the
audio output
from the
Auxiliary
PCB.
Specifically, the +5
VDC
from the
Regulator/Au-
dio II
PCB provides
most logic
power to the
Analog
Vector-Generator
and
Auxiliary
PCBs: ±22
VDC is
regulated
on
the Analog
Vector-Generator
PCB to
produce
±
15;
and
+
22V
DC
provides
power for the
audio
output of the
Auxiliary
PCB. The
audio output
from the
Regulator/Audio
II
PCB directly
drives the
game
speaker and
is controlled
by
the volume
con-
trol, mounted
inside the coin door.
The
power supply is the source of
all voltages in
the game. These voltages
are protected
by
five
fuses
in the fuse block on the power
supply chassis.
The primary winding of
the
power
supply transform-
er is protected
by the cartridge-type fuse in
the
power supply
chassis.
Figure 16
illustrates the distribution
of power in
this game. Figure 17 illustrates
the distribution
of
signals.