10-16 Troubleshooting
1560D-UM051D-EN-P – February 2005
Power Circuit SCR Replacement Procedure (cont.)
Troubleshooting (cont.)
C. Install Refurbished Stack
1. Inspect all connections on the module. Inspect wire insulation and
components for damage.
2. Install the module in the cabinet. Watch for power cables and fibre-optic
cables as module is slid into place. Tighten locking nuts at the bottom
of the module.
3. Connect power cables and tighten hardware to 30 N-m (20 ft-lb).
4. Install gate-driver board, ensuring that the locking tabs on the nylon
circuit board supports are all engaged. Plug in thermistor and gate
connectors and reconnect wires to the left side of the board. Plug in
the fibre-optic cables.
5. Make sure all connections are secure. Perform resistance checks
according to instructions on "Thyristor testing" in Chapter 10, page
10-9, and test gate-drive circuits by performing power supply tests in
Chapter 3, page 3-6.
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