TM 11-6730-235-35
omitted. For each of the symptoms that has been
(1) Remove the line plug from the power
included, the probable causes have been listed with
source.
the corresponding corrective action required to
isolate, localize, and remedy the trouble. Troubles
(2) Remove the two screws that secure the
can be isolated to a defective part using the
interlock switch cover to the side of the case
troubleshooting chart in conjunction with the
assembly.
schematic diagram (fig. 2-2) and the wiring diagram
(3) Connect a jumper lead between the two
of the electrical parts shown on these diagrams is
interlock switch S1 terminals to which black leads
illustrated by figure 3-5. When trouble is isolated
are connected (fig. 3-1).
to a defective electrical part, the case assembly
should be removed (para 3-8) and the applicable
(4) Connect a jumper lead between the two
steps of the case assembly disassembly procedure
interlock switch S1 terminals to which white leads
are connected.
applicable steps of the reassembly procedure (para
(5) Reconnect the line plug to the power
c. When troubleshooting techniques localize a
source. Power is now under the control of ON-OFF
trouble to the electrical circuits of the projector
switch S2, only.
and the isolation procedures require that additional
troubleshooting procedures be performed with
power on, special considerations are involved.
Troubleshooting of the electrical circuits of the
projector require that the top plate assembly be
opened. Opening the top plate assembly opens the
contacts of interlock switch S1 (para 2.3c), remov-
ing power from the projector. To apply power to
the electrical circuits in order to test them, press
the button of interlock switch S1 inward with one
finger. If this technique is not convenient, perform
the following steps to bypass the interlock switch:
WARNING
Be careful when performing any work on
the interior of the case assembly of the
projector. Voltages that can be dangerous
to life exist within these circuits.
Figure 3-1. Projector wiring diagram.
3-2
