maintenance/
troubleshooting
410
Synrad
Series 48Series 48
Series 48Series 48
Series 48 operator’s manual
Troubleshooting
Possible Causes:
■ The laser is in an over temperature condition.
Allow the laser to cool. Verify that the laser is receiving the proper air or water flow per Table 4-2 below.
On air-cooled lasers, verify fan operation and check for at least 2.25" of unobstructed clearance around
the fan housing. To restart the laser, disconnect DC power, wait 30 seconds, and then reapply DC power.
Table 4-2 Series 48 cooling specifications
Model Air-cooled Water-cooled
48-1 250 CFM × 2 fans (1 per side) 0.5 GPM, < 60 PSI
48-2 250 CFM × 4 fans (2 per side) 0.8 GPM, < 60 PSI
48-5 N/A 1.5 GPM, < 60 PSI
Symptom:
■ No output beam and the PWR and LASE LEDs are Off, but +30 VDC is applied.
Possible Causes:
■ A fault shutdown has occurred. Pin 1 on the DB9 Connector is at 0 VDC in reference to pin 2 or
pin 4 (Pin 1 is at +15 VDC during normal operation).
An overtemperature, overvoltage/undervoltage, or RF circuitry failure has occurred.
Correct the problem(s), then remove power from the laser for 30 seconds. Re-apply power (on Keyswitch
lasers, cycle the Keyswitch or Remote Keyswitch).
Symptom:
■ No output beam, but the PWR LED is On. The LASE indicator is dim and does not brighten.
Possible Causes:
■ A PWM Command input signal is not present.
Verify that a PWM Command signal is present on the CTRL input. On 48-5 dual-tube lasers, a Com-
mand signal must be applied to both CTRL1 and CTRL2 inputs simultaneously. See Controlling laser
power in the “Technical Reference” section for PWM Command signal details.
Symptom:
■ Laser power varies or responds intermittently to input PWM Command pulses.
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