Trouble Shooting; Power Not Turn On; Fuse Is Blown - Denon AVR-2310 Service Manual

TROUBLE SHOOTING

1. POWER

1.1. Power not turn on

Power not turn on
YES
Is the ON/STANDBY indica-
tor on the front panel flashing
red?
YES
Is the fuse blown?
YES
Does the power turn on when
the POWER switch is turned
off then back on?
YES
Check the primary circuitry
parts including the POWER
switch (for poor contacts,
etc.), and replace any defec-
tive parts.

1.2. Fuse is blown

YES
Check for leaks or short cir-
cuits in the primary side
parts, and replace any defec-
tive parts.
YES
Are there any incomplete
connections in the connec-
NO
tors connecting between the
various circuit boards?
YES
Connect the connectors
properly.
NO
Refer to Fuse is blown
Is a DC 5V voltage being
supplied from the
NO
POWER (CN505 pin 4) to the
microprocessor?
YES
Check the microprocessor
periphery circuitry
replace any defective parts.
Fuse is blown
YES
Check for short circuits in the
rectifier diodes and circuitry
of the secondary side rectify-
ing circuits, and replace any
defective parts.
YES
After repairing, also replace the fuse.
AVR-2310CI/2310/890, AVC-2310
Is there a short
NO
between the speaker termi-
nals and the ground?
YES
Check for damage in the
power amplifier circuitry parts
and replace any defective
parts.
Is a DC 5V voltage output
when the cord supplying the
PCB
NO
power from the PCB SUP-
PLY to the microprocessor
(CP511) is unplugged?
YES
Check the circuitry and parts
from CP511 on the PCB
SUPPLY to the microproces-
and
sor for damage and short-cir-
cuits, and replace
defective parts.
YES
Check for short circuits in the
power stabilizer unit's regula-
tor output terminal and the
ground, and replace any
defective parts.
YES
24
circuit Correct the short circuit
NO
between the speaker and
the ground.
Check the parts from IC501
NO
to the primary circuitry and
replace any defective parts.
any