HCD-GPX5G/GPX7G/GPX8G
21
1.
Defect of AMP circuit
1-1. If PROTECT mode is “AMPLIFIER”,
The following defect might be possible.
Defects
Possible cause
OTP (Over Tempera-
ture Protection)
Unusual heat up of MOSFET by im-
proper assembly of heatsink, destruction
of MOSFET etc..
DC Detection
DC appears in SP terminal by defect of
AMP IC and MOSFET or output is short-
circuit.
Unusual output of
Power mount
The power mount has unusual output.
1-2. If speaker does not have output even if the set status is not
in PROTECT mode
The following defect might be possible.
Defects
Possible cause
Under Voltage
IC1402 output is below 12V.
RESET defect
Reset signal status from micom is not ‘H’.
2.
Defect of power supply circuit to AMP
2-1. If the PROTECT mode is “POWER SUPPLY”,
There is possibility of unusual power supply of any of the
AMP IC or Pre-ampli
fi
er.
• To release from this mode.
Press
[
u
] button and [
x
] button simultaneously
again or unplug and re-plug in the power cord.
