Operating instructions

Trouble Probable Cause Recommended Action
No sound output.
No LEDs lit.
CP45 does not respond to
commands.
No power to CP45 Check that the power blocks are firmly plugged
into a live mains outlet of the proper line
voltage.
No LEDS on the front panel are lit.
Power LED's on front edge of the
main board are on.
There is sound.
No LEDS on the front panel are lit.
Power LED's on front edge of the
main board are off.
There is sound.
The CP45 locks in the bypass mode
(the bypass LED flashes) regardless
of any format command you
select.
There is sound.
Front panel board ribbon cable is unplugged.
Main board inside the CP45 is unplugged
Main power block not properly plugged in.
Blown fuse.
Open front panel and plug back in the ribbon
cable from the main board to its socket in the
front panel board. The cable does not twist, it
lies flat when plugged in.
Remove the main power block only from the
mains supply, open the front panel and plug
the main board back into it's socket in the
backplane. Plug the main power block back
into the mains outlet.
The fuse on the main board is a 1 Amp slow
blow and will blow only if there is a major
malfunction in the CP45.
D. TROUBLESHOOTING PROCEDURES
3-5