Trouble Shooting; Power - Denon AVR-E200 Service Manual

TROUBLE SHOOTING

1. POWER

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