High Voltage Amplifier
18014-D02 Rev E, Sept. 3, 2019
Page 12
www.thorlabs.com
Part 5. Maintenance
The HVA200 amplifier needs very little maintenance under normal operating conditions.
There are no serviceable parts in the HVA200. The enclosure may be cleaned by wiping
with a soft damp cloth. If you suspect a problem with your HVA200 please call Thorlabs
and technical support will be happy to assist you.
5.1.
Fuse Replacement
The AC input is protected by a fuse located in a pull out compartment drawer on the rear
panel AC connector. Refer to Figure 2 on page
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. If
replacement is needed, disconnect the power cord from the back of the amplifier and pull
the fuse compartment drawer out to expose the fuse. A small screwdriver may be used to
pry the drawer open.
Replace the fuse with the correct rating. Do not use a fuse with a current rating higher than
the unit is rated for. The fuse ratings are as follows:
115 V: 630 mA 5x20 mm SLO-BLO
230 V: 400 mA 5x20 mm SLO-BLO
5.2.
Ventilation
For proper operation and protection of the output amplifier, it is important that the
ventilation passages located on the sides and rear of the unit not be obstructed from free
airflow.
5.3.
Troubleshooting
Problem
Solutions
“PWR ON” not illuminating, unit is not
functioning
Check that the power switch in the on
position, the mains connection is correct,
and the fuse has not been damaged.
Output will not enable, “OUTPUT ON”
is flashing
The amplifier has gone into a protection
mode because the circuitry has sensed
that one of the HV supplies is not
working correctly.
