Denon AVR-X3300W Service Manual page 70

TROUBLE SHOOTING
1. POWER
1.1. The unit does not power on
The unit does not power on
Does the power indicator on the front panel
flash in green or white when the power is turned
on?
YES
YES
Is a fuse blown? See "1.2. Fuse is
NO
Is DC 5V being supplied from the SMPS PCB
(CN4141) to the HDMI PCB?
YES
Check the circuits around the Microprocessor
on the HDMI PCB and replace any faulty parts.
Does the power display on the front panel lights
green after approximately 10 seconds?
NO
YES
Is a fuse blown? See "1.2. Fuse is
NO
Check the voltage of pins 1, 3 - 7 of N1019 on the
HDMI PCB while the power display is flashing in
green or white.
0.6V or -0.6V
Remove the connector (CP4001) of the SPEAKER PCB.
Check the "3-2. Protection History Display Mode"
NO
Does the power indicator on the front
panel flash in red when the power is turned
on?
NO
blown" TO "6. SMPS"
NO
NO
Is DC5V output even when the connector
(N1033) supplying power from the SMPS PCB
to the HDMI PCB is removed?
YES
Check for breakages and short circuits in the
circuits and parts between N1033 on the HDMI
PCB and the microprocessor power supply and
replace any faulty parts.
YES
Are there any parts not fully connected into
the connectors that connect the PCBs?
YES
blown" Connect the connectors correctly.
0V
Check the circuits around the Microprocessor
on the HDMI PCB and replace any faulty parts.
1.2. Fuse is blown
YES
Check the rectifier diode in the
Check for leaks and short
rectifier circuit on the second-
circuits in the parts on the pri-
ary side, and check for short
mary side. Replace any faulty
circuits. Replace any faulty
parts.
parts.
Replace the fuse after repair.
NO
TO "3-2. Protection History
Display Mode"
70
Blown fuse
Check for short circuits between
the regulator output terminal and
GND in the power supply stabiliza-
tion circuit. Replace faulty parts if
there is a short circuit.