33
Exchange of Thyristors for Size D1 to D4
3ADW000195R0501 DCS800 Service Manual e e
8.
Remove the SDCS-PIN-4 board:
OnBoard field exciter
bridge module
Snubber resistor
Thyristor modules
Current transformer
Temperature sensor
Remove SDCS-PIN-4
9.
Remove the gate leads from the faulty thyristor module and mark the
connectors clearly.
10.
Remove the busbars necessary to get full access to the faulty thyristor module.
11.
If a current transformer must be removed, mark its position and the
connections clearly.
Note:
Remove only as many parts as needed around the faulty thyristor module.
12.
Remove the faulty thyristor module and mark it clearly as defective.
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