Trouble Shooting; Power - Denon AVR-S510BT Service Manual

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 when the power is
turned on?
YES
Does the power display
on the front panel change
to lighting in green after
approximately 10 seconds?
NO
Has a fuse broken?
NO
Check the voltage of pins 6
- 9 of CN712 on the DIGITAL
PCB while the power display
is flashing in green.
3.3V
Disconnect the MAIN PCB connector (BN502).
Check the "Protection History Display mode"
(See 25 page))
1.2. Fuse is blown
Check for leaks and short
circuits in the parts on the
primary side. Replace any
faulty parts.
NO
Does the power indicator on
the front panel flash in red
when the power is turned on?
NO
Has a fuse broken?
NO
Is DC5V being supplied
from the SMPS PCB (BN601)
to the DIGITAL PCB?
YES
Check the circuits around
the Microprocessor on the
DIGITAL PCB and replace
any faulty parts.
YES
YES
See "1.2.Fuse is blown."
Check the microprocessor ## circuit from
0V
CN751 in the DIGITAL PCB, and replace
any faulty items.
Broken fuse
Check the rectifier diode in
the rectifier circuit on the
secondary side, and check
the circuit for short circuits.
Replace any faulty parts.
Replace the fuse after repair.
YES
YES
See "1.2.Fuse is blown."
Is DC5V output even when
NO the connector (CN751)
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
CN751 on the DIGITAL PCB and the
microprocessor power supply and
replace any faulty parts.
Are any parts not fully
connected in the connectors
that connect the PCBs?
YES
Connect the connectors
correctly.
Check for short circuits between
the regulator output terminal
and GND in the power supply
stabilization circuit. Replace faulty
parts if there is a short circuit.
35
NO
TO "6. SMPS"
(See page 46 )
To "Protection
NO
History Display
mode"
(See 25 page)