Operating instructions

3-13
D. TROUBLESHOOTING PROCEDURES (cont'd)
Trouble Probable Cause Recommended Action
You cannot change from local to
remote fader operation.
The remote control is not plugged in. Plug in remote control or check the wiring to
see if any of the lines are open.
Call service engineer.
The CP45 will only select Mono or
the non-sync/aux formats. If
either Dolby Stereo format is
selected, the LED does not stay on
when the button is released.
Missing or unplugged CAT222A/SR module. Switch to bypass, open front panel, unplug
ribbon to front panel and check that the Cat
No. 222A/SR module is securely plugged into
the rear panel. Plug the ribbon cable to the
front panel back in securely and close the unit.
The CP45 will select formats but
the sound does not change
between them.
The unit is in bypass (bypass LED on front
panel flashing).
If bypass switch is in the up position, set it to
the down position. There is about 3 seconds
delay, then the LED stops flashing and the
format selection will work normally.
If the bypass switch is in the down position but
the LED is still flashing, call the service
engineer.
With optional automation
connected to the CP45:
The CP45 freezes into one format
and does not latch any selected
format or other types of
commands when you press the
front panel switches.
Incorrect wiring to D-connector plugged into
CP45.
Unplug the D-connector from the back of the
CP45. If you can exercise local control over the
CP45, the problem is in either the Cat. No. 511,
the wiring to the automation equipment, or
the automation equipment. Call service
engineer.
If you cannot exercise local control over the
CP45 even with the automation equipment
disconnected from the CP45, switch to bypass
and call service engineer.