36
Exchange thyristors sizes H1 … H4
3ADW000488R0101 DCS880 Service manual e a
Install new SDCS-BAB-F0x
1. Ensure that the new SDCS-BAB-F0x is of the correct type, either SDCS-BAB-F01 or SDCS-BAB-F02.
2. Remove old heat conducting compound (grease) from the heat sink. Clean the mounting surfaces (heat sink
and SDCS-BAB-F0x bridge) with an appropriate solvent (e.g. ethanol) by means of tissue paper. When the
heat sink is clean, spread out the heat conducting compound with a rubber spatula or by hand.
3. Apply a thin layer of heat conducting compound to the new SDCS-BAB-F0x bridge.
4. Spread the heat conducting compound evenly by moving the SDCS-BAB-F0x forward and backward on the
heat sink.
5. Tighten all clamping screws by hand until the screw heads touch the bottom of the thyristor module. Then
tighten the screws to 2.0 Nm torque.
6. Tighten the screws to nominal torque according to table
Nominal mounting torque for thyristor modules and
SDCS-BAB-F0x.
7. Reconnect all connectors or cables to the SDCS-BAB-F0x.
8. If existing, reconnect the plastic cover.
9. Follow the instructions Install new thyristor modules
beginning with step 13.
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