Olivetti JS-420, Service Manual

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3MK
1-4-3
1-4-2 Electric problems
Troubleshooting to each failure must be in the order of the numbered symptoms.
Problem Causes Check procedures/corrective measures
(1)
The feedshift sole-
noid does not oper-
ate. 1. Poor contact in the con-
nector terminals.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
2. Broken solenoid coil. Check for continuity across the coil. If none, replace the solenoid.
Y112370-6 Service Manual