10.1. Replacing The Main Fuses; 10.2. Replacement Parts - THORLABS TLX3 User Manual

O-Band Tunable Laser Source

10.1. Replacing the Main Fuses

The system is protected by a main fuse block located in the power entry module where the main power cable plugs
into the back panel of the instrument. If the instrument does not appear to power-up, especially after a power outage
or storm, you can check the condition of the main power fuse without removing the cover of the instrument by
following the following steps.
1. Turn the instrument OFF using the front panel switch
2. Unplug the main power cable.
3. Carefully remove the fuse holder slide from the power entry module (use a flat screwdriver) and remove
the fuses.
4. Check the fuses for continuity. If in doubt, replace both fuses. Additional replacement fuses can be
purchased from Thorlabs or an electronics supply house. Always use fuses of the same type as the
original.
5. Reinstall the fuse holder slide into the power entry module, taking care that it fully seats until the top is flush
with the rest of the power entry module.
6. Plug the main power cable back into the unit and power up using the front panel switch.
If the fuse blows repeatedly, it is likely that an internal failure has occurred. Do not attempt to bypass the fuse as
this can create a dangerous situation that could further damage the instrument or harm personnel. In this case,
please contact Technical Support for directions.

10.2. Replacement Parts

The following parts can be obtained by contacting Thorlabs Technical Support

1.25 A, Type T, 250 VAC fuse for main power

Instrument IEC main power cord
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Chapter 10: Maintenance, Repair, & Fuses
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