e. Locate the release handles and disengage them.
drawer forward and locate the INTERLOCK switch S102.
INTERLOCK switch forward.
Release handles and INTERLOCK located on
synchronizer-generator, marker-electronic SN-386/FPN-40 (Figure 10).
NOTES: The INTERLOCK-switch must be pulled forward to restore
power to the synchronizer-generator SN-386/FPN-40.
An INTERLOCK serves as an OFF/ON switch. Because of its
design the INTERLOCK provides additional functions.
First, it removes the power from the unit when an
operator opens a panel or drawer.
This provides safety
for the operator. Secondly, when testing is required by
the repair person, it restores power to the unit when
placed in its most forward position.
f. Locate the timing control card A1900 inside
generator, marker-electronic SN-386/FPN-40 (Figure 41).
g. Locate the PPI DELAY control R1903 on timing control card
A1900 (Figure 41).