Christie SLC 20, Installation And Operation Instruction Manual

Page: 38 / 63

S L C S e r i e s X e n o n C o n s o l e
8-2 CHRISTIE DIGITAL SYSTEMS
August 7, 2003
8.2. M
A L F U N C T I O N
: L
A M P
D
O E S
N
O T
I
G N I T E
The system powers up, but the lamp does not ignite.
Probable Cause Corrective Action Date/Remarks
A Ready lamp is not on. Check all interlock or blower switch
circuits.
B DC supply is not set to
proper value.
Increase lamp current by adjusting
power supply tap switch.
C Failed power supply. With DC power switch ON (open
circuit), measure across igniter (+) and
(-) positions for 85VDC minimum. If
minimum voltage is not present, check
power supply output.
D Failed igniter Listen for igniter buzz when manual
start button is pushed. If buzz is heard,
replace spark gap or AC transformer in
igniter.
E Igniter relay has failed. Listen for relay to pull in as start button
is pushed. If relay does not activate,
measure coil voltage and/or check relay
circuit. If no output voltage, replace
defective relay.
F Lamp failed. Inspect lamp and replace.
Table 8-2: Troubleshooting for Lamp Does Not Ignite
8.3. P
O W E R
S
U P P L Y
O
U T P U T
I
S
L
O W
O
R
N
O T
S
T E A D Y
Power is erratic.
Probable Cause Corrective Action Date/Remarks
A One phase open or low at
TB2 or TB1
Inspect all DC and AC connections.
Measure voltages at TB2–L1, TB2–L2,
and TB2–L3, then at TB1–HI/LO links.
Check AC source or repair circuit.
B Failed diode
With power supply OFF, check for open
or short in diodes. Use ohmmeter and
reverse leads. If both measurements are
below 1
Ω
, diode is shorted. If above
10 k
Ω
, diode is open. Replace diode.
Table 8-3: Troubleshooting for Power Supply Output Low or Not Steady