Operating instructions

3-12
D. TROUBLESHOOTING PROCEDURES (cont'd)
Trouble Probable Cause Recommended Action
Projector changeover command
does not change to sound output
of the selected projector and the
front panel LEDs do not light
according to the projector
selected.
Defective changeover relay or switch.
Defective wiring from relay or switch to
terminals on rear of the CP45.
Malfunctioning Cat. No.510 optical
preamplifier.
If possible, check that the relay or switch
contacts actually open and close as the
changeover command is issued several times.
Check that the wiring has not been damaged
and that connections are firmly made at both
ends.
Call service engineer.
The sound output of the CP45 is
at a medium level, regardless of
the setting of the fader control.
Fader connector unplugged from CAT No 510
optical preamp board.
Open circuit in fader circuitry.
Plug fader connector back into the 2 pin
connector towards the front of the left hand
side board. It can only go one way round.
Call service engineer.
When you select the local fader,
there is no output from the CP45;
all LED indications are proper;
remote fader operation is OK.
There is a short on the fader wiring to the front
panel potentiometer.
Call service engineer.
When you select the remote
fader, there is no output from the
CP45; all LED indications are
proper; local fader operation is
OK.
Defective wiring from remote fader to CP45.
Short circuit on the remote fader.
Check the wiring for damage or breaks. Check
that all connections are firmly made.
Call service engineer.
Repair or replace remote fader.