Creative Engineering ROCK-A-FIRE EXPLOSION - Page 239

************ D. Lighting Problems cont. - Houselights ***********
Symptom: No Houselights
Procedure Result
1. Reset the show manually
by pushing the buttons
on the Dual P.C. Mount.
2. Check A.C. Monitor to
be sure it is plugged in
and cable is connected.
3. Flip the switch on the
House Light Dimmer Bd.
4. Test voltage on pin #1
of House Light Dimmer Bd.
5. Check A.C. Monitor out-
put to pin #5 on House
Light Dimmer Board
for 12.5 volts A.C.
1/2 wave.
6. Trace the Signal back to
the A.C. Monitor.
7. Check voltage on Q3 trans.
of House Light Dimmer Board.
Symptom: Lights always dim
See page 5-009.
Lights do not come on bright -
go to Trouble-Shooting Light
Box, see pages 5-008 thru
5-009 and 5-066.
If no 5 volts - trace wiring
back thru Dual P.C. Mount and
Tunnel, back to the power
supply. Repair or replace if
necessary. See detailed
account in pages 5-008 and
5-009.
See pages 5-009 and 5-063,
also 5-075.
Repair if broken or replace.
See pages 5-009 and 5-064.
Procedure Result
1. Adjust 'pots' of House
Light Dimmer Board.
2. Take a reading on pin #3
with your 0
1
scope and
manually issue a stop and
a play from the Dual P.C.
Mount buttons.
See schematic and instructions
Pages 5-009 and 5-064, or
replace.
Signal doesn't switch - test
output from Show Control Bd.
Repair or replace, see
pages 5-004 and 5-047.