T R O U B L E S H O O T I N G
Troubleshooting
12
LDX-3412
C H A P T E R
3
this manual. Our Service Engineers will be glad to answer any questions
concerning this or any other ILX Lightwave product..
Table 3.1 Troubleshooting Symptoms and Actions
SYMPTOM
CORRECTIVE ACTIONS
LDX-3412 will not power up.
•
Check AC Power line voltage and power cord connection.
LDX-3412 powers up, but there is
no current OUTPUT.
•
Check the MODE switch. Output will only be on while in CONST I or
CONST P modes.
•
Check the interlock feature. If interlock is enabled, there must be a
short between pins 1 and 2 of J105 to have output.
•
Check the OUTPUT switch. The LED should be lit.
•
Check the OPEN CKTindicator. If it is lit, there is an open in the output
circuit.
Output current at limit, cannot be
lowered
•
Check the current output control knob. Set it fully counter-clockwise
(CCW) for minimum output.
•
If CONST P mode is used, check the feedback gain setting (Section
2.3.11). Try turning the feedback GAIN controls down (CCW).
•
If CONST P mode is used, check the feedback connections. Try
reversing the polarity of the photodiode.
OUTPUT intermittently turns off
during operation.
•
Check the interlock circuit. A broken circuit will reset the LDX-3412 to
the off state.
•
Check that the AC power cord connection is secure. Power drop-outs
may turn the OUTPUT off.
•
Check the AC line cord to make sure that it is well-connected.
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