Specifications

MINIATURE LOCAL MUX-12

WARNING

These service instructions are for use by qualified

personnel only. To avoid shock, do not perform any

servicing other than that contained in the operating

instructions unless you are qualified to do so.

Table 5-1. Fault isolation and troubleshooting.

Symptom Action

All front-panel a) Check that power is supplied to the unit.

indicators are off b) Replace unit. The fault is probably in the unit’s power-

supply circuits.

Local SYNC LOSS and/or a) Check the main channel’s connection at both sites. Verify

REMOTE SYNC LOSS that these connections are in accordance with the procedure

is ON described in Section 3.4.7 and 3.5.3.

b) Replace both units: one at a time. If the problem still exists,

the main channel link between the units is probably defective

and should be checked.