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| Lock release not working |
- There are 2 things to check. Firstly that the lock release timer in the 9307.2 timer relay is being triggered and secondly that the relay is changing state and operating the lock release.
- Short out (briefly) terminal 9 to 0 on the 9307.1. If the lock release operates then you can assume the output side of the lock release circuit is OK, if the lock release fails to operate you will need to check the operation of the relay and your lock release connections.
- If the trigger circuit is suspected, trace your cables from 9 on the 9307.2 timer relay to terminal 9 on the telephone. Applying 0v (terminal 6 in the telephone) to any point on this wire (9) should operate the lock release.
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