FlashGuard 2000B Troubleshooting Guide
Page 4
FLASHHEAD (STROBE) PROBLEMS
Section 1
Flashhead does not operate in any mode, no LED’s on.
Possible Cause
:
Input power incorrect.
Diagnostic Test
:
Measure input power – it should be 120 VAC
±10%.
Corrective Action:
Supply correct input power.
Possible Cause
:
Power supply interlock switch not engaged.
Diagnostic Test
:
Press the power supply interlock switch and hold it down.
Corrective Action:
Close the unit – the system should operate properly.
Possible Cause
:
Blown F1 (4 Amp) fuse, or transformer (630mA) fuse.
Diagnostic Test
:
Remove all three circuit boards and check for damage. Remove the
photocell wiring from TB1-1 and TB1-2. Perform “Flashhead Isolation Test”
(pg. 9) and check for improper resistances. Leave the flashhead cable
disconnected, replace the fuse and apply power. Reconnect the strobe
cable, the photocell wiring, and the circuit boards one by one to determine
which one will blow the fuse.
Corrective Action:
Replace the defective component.
Section 2
Flashhead does not operate in any mode, control power indicator
on, high-voltage neon lamp off.
Possible Cause
:
Flashhead interlock switch not engaged.
Diagnostic Test
:
Remove the flashhead wires TB2-5 and TB2-6 (gray and white), and
measure resistance between them – it should be less than 5
Ω
.
Corrective Action:
Re-seat the flashhead cover, making sure the interlock switch engages
when the cover is closed. If the system still does not have continuity
between TB2-5 and TB2-6, replace the flashhead interlock switch and/or
inspect the strobe cable for damage.
Possible Cause
:
Relay
K1
not energizing.
Diagnostic Test
:
When the interlock switches are engaged, the K1 relay should energize. If
not, measure for 120 VAC across the relay coil. Alternatively, remove the
connectors and check resistance across the K1 coil – it should be 300
Ω
.
Corrective Action:
Replace the K1 relay.
Possible Cause
:
Faulty high-voltage board.
Diagnostic Test
:
Visually check the traces on the high-voltage board. Check for any shorted
diodes. Use diode check function on multimeter if available.
Corrective Action:
Replace the high-voltage board.
