Creative Engineering ROCK-A-FIRE EXPLOSION - Page 240

Symptom: Lights always dim
Procedure
3. Pin up the #3 pin of the
of the House Light Dimmer
Board to ground - first
remove Show Control Board
or it may be damaged.
Cont.
Result
Replace Show Control Board.
Symptom: Lights always bright.
Procedure Result
1. Check the override
switch on the House
Light Dimmer Board.
2. Verify the operation of
the background Music Mute
by issuing a manual stop
and play.
Reset it in normal position.
If background music mutes but
lights don't dim - replace Q3
on the House Light Dimmer Bd.
If background music does not
mute - replace Show Control
Board. See page 5-063.
Symptom: Erratic Lighting - flickering
Procedure Result
1. Check the A.C. voltage on
pin #5 of House Light
Dimmer Board for 12.5 v.
A.C. 1/2 wave.
2. Check Q3 trans. collector
leg for voltage fluctuation
J._nl&..
Repair or replace A.C. Monitor
see pages 5-009 and 5-064,
also 5-075.
If voltage fluctuates, replace
Q3.