THORLABS SHB025 User Manual page 18

Ø1/4" Shutters and Controller
Chapter 8
See below for possible troubleshooting issues:
Problem
Power LED not enabled after
pressing the Power ON
button.
Shutter does not open or
close.
Status LED turned amber.
Status LED turned red.
Shutter operation is erratic
or stuck.
Unit powers on when DC
power is applied.
Page 16
Troubleshooting
Check the AC cord IEC connector is properly
connected to the switching power supply and that it is
connected to a live AC mains outlet.
Check DC plug is fully inserted into the controller's
DC jack labeled 5 VDC 2.4 A.
Check the SHB025(T) shutter cable 4 pin mini-DIN
plug has arrow facing up and is fully inserted into the
connector labeled OUTPUT.
In Protected Mode: Status LED should be green
under normal operating conditions, and turn amber
as a warning to state there are 15 seconds until
shutdown (at modulation frequencies of 16 to 50 Hz).
See Section 4.3.1.
In Protected Mode: If modulation frequency is
>15 Hz, a timeout period is applied to disable the
shutter drive circuit after the 15 second amber LED
warning.
Verify the shutter head is not located near magnetic
sources or directly against ferrous materials,
especially the front surface.
"Default to On" mode has been set. Follow steps in
Section 4.4 to disable.
Chapter 8: Troubleshooting
Solutions
TTN042240-D02