48
YES
YES YES YES
NO
NO
NO
Is the ON/STANDBY
indicator on the front panel
ashing red?
Unplug the power cord.
Does the power turn on
when power cord is plugged
in again?
Check the primary circuitry
parts (for poor contacts,
etc.), and replace any
defective parts.
Check the microprocessor
periphery circuitry and
replace any defective parts.
Check the circuitry and parts
from BN94 on the ST-BY
B'd to the microprocessor
for damage and short-
circuits,and replace any
defective parts.
Is a MCU+5V voltage being
supplied from the ST-BY B'd
to the microprocessors?
Is a MCU+5V voltage output
when the cord supplying the
power from the ST-BY B'd to
the microprocessor(BN94)
is unplugged?
Is the fuse blown?
Refer to "1.2. Fuse is blown".
Power not turn on.
Are there any incomplete
connections in the
connectors connecting
between the various circuit
boards?
Correct the short
circuit between the
speaker and ground.
Connect the connectors
property.
Is there a short circuit
between the speaker
terminals and the ground?
Check for damage in the
power amplier circuitry
parts and replace any
defective parts.
Check the parts from
IC204 to the primary
circuitry and replace
any defective parts.
YES
YES
YES
NO NO
NO
NO
TROUBLE SHOOTING
1. POWER
1.1. Power not turn on
Check for leaks or short
circuits in the primary side
parts and replace any
defective parts.
Fuse is blown
Check for short circuits in the
rectier diodes and circuitry of
the secondary side rectifying
circuits and replace any
defective parts.
After repairing, also replace the fuse.
Check for short circuits in
the power stabilizer unit's
regulator output terminal and
the ground and replace any
defective parts.
1.2. Fuse is blown
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General
Weight and Dimensions
