Denon PMA-540 - METHOD OF ADJUSTMENT; IDLE CURRENT ADJUSTMENT METHOD OF TONE & POWER AMP (ETC-404 PRINTED BOARD); ADJUSTMENT OF EQUALIZER (AUE-012 PRINTED BOARD)

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games PIA -540
METHOD OF ADJUSTMENT
ETC-404
DC VOLTMETER
. DIGITAL VOLTMETER
IDLE
CURRENT
ADJUSTMENT
METHOD
OF
TONE
&
POWER
AMP
(ETC-404
PRINTED
BOARD)
1.
6.
res
Place
the
unit
in
normal
position,
not
sideways
or
tilted.
Avoid
too
much
ventilation,
since
the
adjustment
must
be
done
where
temperature
is
between
15°C
and
30°C.
Set the switches on the unit as follows:
Power = COFFE
Volume > —odBp
Direct couple > DIRECT
Speaker terminals — No load (no speaker connected)
Remove
the
top
cover,
and
the
VR7,8,9
and
10
of
the
tone
&
power
amp
printes
board
(2220609001)
fully
counte
clockwise.
Connect a DC voltmeter to the test points 7(+), 8(—) or to 10(+), 9(—)
Plug
in
the
AC
cord
to
power
outlet
of:
Europe
220
V
(198~231
V):
U.K.
and
Australia
240
V
(216~252
V):
Canad
and
U.S.A.
120
V
(180~126
V);
and
turn
the
power
on.
Immediately
(within
one
minute),
turn
VR7
and
VR8
clockwise
and
adjust
the
test
point
voltage
(Vrp)
to
10+1
n
preliminarily.
After
about
two
or
three
minutes
of
the
above
preliminary
adjustment,
adjust
VR7
and
VR8
so
as
Vrp
reads
1541
m
Adjust VR9 and VR10 so as VTP reads 25+2 mV preliminarily.
About
4
minutes
after
the
above
preliminary
adjustment,
adjust
VRQ
and
VR10
so
as
VTP
reads
3342
mV.
ADJUSTMENT OF EQUALIZER (AUE-012 PRINTED BOARD)
ts
2.
Insert short pins into PHONO input terminals.
Connect
a
digital
voltmeter
(0.01
mV
~
1
mV
DC
range
must
be
measurable)
into
each
of
REC.
out
terminals
(L
&
channels).
For
easier
measuring
to
avoid
value
fluctuation
on
the
meter,
connect
a
100
k
ohm
(1/4W)
resistor
between
the
ends
«
the
R17/18
10
M
ohms
(1/4W)
resistor
on
the
printed
board.
Set
the
FUNCTION
switch
to
“MM”
position,
and
turn
the
main
volume
to
MIN.