Troubleshooting - Yamaha CP2000 Owner's Manual

Troubleshooting

The following table explains the operation of the CLIP, TEMP, and PROTECTION
indicators, typical situations in which they may light up, and what action to take if and
when they do.
Symptom
POWER indicator
not lit
No sound
Stereo sources
sound odd
CLIP indicator lit
TEMP indicator lit
PROTECTION
indicator lit
Possible Cause
Make sure the power
Power cable discon- cable is connected
nected or amplfier properly and the
turned off. POWER switch is in
the ON position.
Input signal not con- Check the input con-
nected or LEVEL con- nections and LEVEL
trols turned down. control settings.
Check the polaity of
Incorrect speaker the speaker connec-
polarity. tions and correct if
necessary.
Reduce the input sig-
The input signal is too nal level, or turn
high. down the LEVEL con-
trol.
Ensure that the total
speaker impedance is
The speaker imped-
not less that 2
ance is too low.
REO/PARALLEL) or 4
(BRIDGE).
There is a short at the
speaker terminals, Locate and remove
amplifier terminals, or the short.
in the speaker cable.
Make sure that the air
The heatsink temper- vents are not blocked
ature has exceeded and improve the air-
85˚C. flow around the
amplifier.
Make sure that the air
The heatsink temper- vents are not blocked
ature has exceeded and improve the air-
90˚C. flow around the
amplifier.
A DC offset of ±2 V or
Contact your Yamaha
more was detected at
dealer or service cen-
the amplifier's out-
ter.
puts.
Troubleshooting
Remedy Protection System
The limiter circuit pre-
(STE- vents further clipping
distortion.
The heatsink temper-
ature warning circuit
activates.
The protection circuit
activates, opening the
output relay and dis-
connecting the speak-
ers. The output relay
closes automatically
when the heatsink
has cooled down, or
the DC fault is
removed.
CP2000—Owner's Manual
13
—
—
—