DENON AVR-790 _ AVR-590 _ AVR-1910 _ AVR-1620 _ AVR1610 _ POWER SUPPLY TROUBLESHOOTING TABLE _ NO POWER
NO POWER ON
Is
the ON/STANDBY indicator on the front panel flashing red?
|
No -->
|
Are there any incomplete
connections in the
connectors
connecting between the
various
circuit boards?
|
No -->
|
Is
there a short circuit between the speaker terminals and the ground?
|
No -->
|
Correct the short circuit
between
the speaker and the ground.
|
Yes
|
Yes
|
Yes
|
||||
Is
the fuse blown?
|
Connect the connectors
properly
|
Check for damage in the
power amplifier circuitry
parts
and
replace any defective parts.
|
||||
Yes
|
No -->
|
Refer
to Fuse is blown
|
||||
Does
the power turn on when the POWER switch is turned off then back on?
|
No -->
|
Is a DC 5V voltage being
supplied from the POWER
B’D (CN1701 pin 4) to the
microprocessor?
|
No -->
|
Is a DC 5V voltage output
when the cord supplying the
power from the SUPPLY B’D
to the microprocessor
(CP1700)
is unplugged?
|
No -->
|
Check the parts from
IC1703 to the primary
circuitry
and replace any
defective
parts.
|
Yes
|
Yes
|
Yes
|
||||
Check the primary circuitry
parts including the POWER
switch (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 CP1700 on the SUPPLY B’D to the microprocessor
for damage and
shortcircuits,
and replace any
defective
parts.
|
||||
FUSE BLOWN
|
||||||
Check for leaks or short
circuits in the primary side
parts, and replace any
defective
parts.
|
Check for short circuits in
the rectifier diodes and circuitry
of the secondary side
rectifying
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.
|
