Troubleshooting
No
Sound
• Check
the
volume control adjustment.
• Check for
proper
voltage
on
the
PCB
edge connec-
tor.
• Check the wiring from the
PCB
to the speaker.
• Check the
speaker
for
low
resistance (approximate-
ly
811)
between
the +
and
- tabs.
Bad
Sound
• Check the wiring to the speaker for
bad
solder con-
nections.
• Check
the
sound
with another speaker.
3-2
Tetris
No
Switch
Input
• Check the ground connections to the switches.
• Check
the
wiring
between
the
PCB
and
switches
for
proper
connection.
• Check
the
switches
with
an
ohmmeter
to verify
proper
operation.
Switch
Operates
Incorrect
Function
• Check the wiring
between
the
PCB
and
switches
for
proper
orientation.
• Check the wiring for shorts
between
switch inputs.
Coin
Meter
Doesn't
Function
• Check the wiring to the coin meter.
• Check that
+5V
to +12V is
on
the
+ side
of
the
meter.
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