Denon POA-6600A - Method of Adjustments

ml
POA-GGOOA
REMOVAL
OF
EACH
SECTION
1. Top Cover
Remove
4
screws
with
washers
(A)
from
the
both
side, 4 screws with washers from left and right
side and 2 screws © from the backside and
detach the top cover in the direction arrow shows.
2.
Front
Panel
1)
Pull
out
the
Power
Knob
picking
up
by
hand.
(As
the
power
switch
is
easily
broken).
2)
Unfasten
2
screws
from
the
bottom,
3
screws
from
the
top,
and
dismantle
the
Front
Panel
in
the
direction
arrow
shows.
3.
Back
Panel
Remove
8
screws
from
the
bottom,
and
take
out
the
Bottom
Cover.
Then
remove
4
screws
from
the
back
panel,
and
detach
the
Back
Panel
out
of
the
3
notches
in
the
direction
as
arrow
shows.
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Front Panel
|
1
&
Notch
Notch
1POA-6600A
m@
METHOD OF ADJUSTMENTS
1. Adjustment of Idle Current (KU9153-1)
1.
Setup
Keep
the
unit
away
from
direct
wind
blown
by
an
air-conditioner
and
an
electric
fan,
and
keep
the
unit
under
normal
conditions.
Adjust
the
range
of
ambient
temperature
to
15
—
30°C.
. Set the following switches as follows:
@
POWER
(Power
switch)
to
off
@
INPUT
LEVEL
(level
control)
to0
(q)
)
@
SPEAKERS
(Speaker
terminal)
to
no
load
(Speakers
disconnected)
Adjustment
.
Connect
DC
Voltmeter
to
Test
Points
(T.P)
of
KU9153-1.
.
Turn
Power
Switch
“ON”.
.
Adjust
VR501
so
that
the
DC
Voltmeter
reads
0.5
~
1
mV.
.
Then
after
10
minutes
warmup,
readjust
VR501
so
that
the
DC
Voltmeter
reads
8
+1
mV.
.
Connect
V.T.V.M.
to
the
Speaker
Terminals.
Set
the
Oscillator
frequency
at
1
kHz,
and
Output
Level
at
100
mV,
then
connect
with
NORMAL
Input
Terminal.
.
Adjust
the
LEVEL
Control
turning
clockwise
to
obtain
the
indication
of
the
V.T.V.M.
connected
to
the
Speaker
Terminal
becomes
2
V.
.
Confirm
that
the
DC
Voltmeter
connected
to
the
T.P.
becomes
slightly
greater
value,
then
adjust
the
VR502
to
obtain
30 +5 mV on the meter.
.
After
15
minutes,
readjust
the
VR502
for
35
+5
mV.
Oscillator
Ook
Digital
Voltmeter
KU-9153-1
VRSO2 VR501
2.
Adjustment
of
Neutral
Point
Voltage
(1)
Connect
a
digital
voltmeter
to
the
SPEAKER
terminal.
(2) Turn the unit power on.
(3)
Turn
the
LEVEL
controls
on
the
back
panel
fully
clockwise
(maximum).
(4)
Confirm
the
voltage
on
the
meter
indicates
within
+100
mV
value.
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