maintenance/
troubleshooting
49
Synrad
Series 48Series 48
Series 48Series 48
Series 48 operator’s manual
Troubleshooting
Laser faults
Each Symptom listed below describes a particular fault condition. For each Symptom, specific causes and
solutions are described in the Possible Causes section.
Symptom:
■ There is no output laser beam; PWR and LASE indicators are off.
Possible Causes:
■ No DC voltage is applied or the voltage level is out of specification.
Check that +30 VDC is available on the power supply output terminals and ensure that DC Power cable
terminal connections are tight.
Check the fuse(s) on the rear of the laser. Replace with fast-blow 10 Amp (48-1) or 20 Amp (48-2/48-5)
AGC/3AG fuses as required.
If your DC-2 or DC-5 power supply is operating at an input voltage of 120 VAC, ensure that a jumper
wire is connected between pins 1 and 2 on the input terminal strip. Refer to Connecting in the “Getting
Started” section for details.
Possible Causes:
■ A reverse DC voltage was applied to the laser.
Replace the fuse(s) with a fast-blow 10 Amp (48-1) or 20 Amp (48-2/48-5) AGC/3AG fuse as required.
Possible Causes:
■ The laser’s DB9 Connector is not configured correctly.
Ensure that the factory-wired DB9 jumper plug is firmly plugged into the laser’s DB9 Connector.
If the laser is connected through the DB9 Connector to external circuits, check that field wiring is
correct. The remote interlock connection (pin 3) must be grounded through your external interlock
circuit to pin 2 or pin 4. Pin 6 must be connected to pin 7 through your external keyswitch circuitry.
Refer to Connecting in the “Getting Started” section and DB9 connections in the “Technical Reference”
section for details. A quick method to isolate the problem to either the laser or the field wiring is to
disconnect field wiring and plug in the factory-wired jumper plug; if the lasers operates normally with the
jumper plug installed, verify external wiring and circuit devices.
Possible Causes:
■ The laser’s Keyswitch or aperture shutter are not set properly.
Cycle the Keyswitch to the OFF position for a few seconds, then cycle back to ON.
Close and then re-open the Shutter Switch.
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