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TROUBLESHOOTING & REPAIR |
SWITCH BOARD TEST (cont.)
TEST PROCEDURE
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1.Disconnect power to the machine and perform
Input Filter Capacitor Discharge Procedure as described in Section F.
2.Disconnect all wiring harness leads (401/403, 1/8, 9, 12, 4/5, 402/404) from the Switch Boards.
3.Fold the leads up so they do not interfere with the exposed PC board terminals. See Figure F.8.
4.Using an ohmmeter, perform the Resistance Tests detailed in Table F.2 and Table F.3. If any test fails, replace both Switch Boards. See Switch Board replacement procedure.
5.If the Switch Boards appear to be burned or over- heated, or if the machine was supplied by a 380 VAC or higher voltage supply when the failure occurred, replace the Capacitors and the Switch Boards.
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