Marantz PM-17 User Manual

6.
DC
OFFSET
VOLTAGE
ALIGNMENT
1.
Before
switching
the
mains
switch.
Turn
down
the
master
volume
to
the
minimum
position
and
set
the
balance
volume
and
tone
volumes
at
the
center
positions.
Set
variable
resistors
R627(on
the
PCB
P601:L
ch)
and
R727(on
the
PCB
P701:R
ch)
fully
counterclockwise.
|
2.
Connect
the
digital
voltage
meter
to
the
speaker
terminal
JOO3(L
ch)
and
J004(R
ch).
And
set
the
digital
voltage
meter
for
the
DC
position.
3.
Turn
the
mains
switch
ON.
Put
thin
adjustment
screw
driver
into
the
hole
of
the
HDAM
(Q601:L
ch
/
Q701:R
ch)
copper
cover.
Adjust
variable
resistors
in
the
HDAM
(Q601:L
ch
/
Q701:R
ch)
value
at
OmV
+5mV
with
in
10
seconds
after
speaker
relay turn ON.
rs
Nagar
hole
7.
IDLING
CURRENT
ALIGNMENT
REMARK
Before
“Idling
current
alignment’,
“
DC
offset
voltage
alignment
”
have
to
be
done!!
1.
Each
of
cement
resistors
R641(on
the
PCB
P601:L
ch)
and
R741
(on
the
PCB
P701:R
ch)
are
provided
with
three
test
points.
Connect
the
digital
voltage
meter,
set
for
the
DC
voltage
input,
to
the
test
points
at
the
two
extremities
of
three
test
points
of
R641
and
R741.
2.
After
the
setup
above,
turn
the
mains
switch
ON
and
heat
up
the
amplifier
about
30
minuet.
3.
Adjust
variable
resistors
R627(on
the
PCB
P601:L
ch)
and
R727(on
the
PCB
P701:R
ch)
according
to
the
digital
volt
meter
reading.
The
target
setting
value
is
18mV(50mA)
for
both
L
ch
and
R
ch.
Measurement point
R641/R741
REMARK
The
idling
current
will
go
down
by
elapsed
time
after
mains
ON.
Please
refer
to
the
table
below.
Idling current
setting value
40 - 35mV
| 4 10min 35 - 25mV
|
10-
20min
25
-
20mV
Elapsed time
after Mains ON
20 - 18mV :
18 - 15mV
DC ADMLY /SH BB
1.
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10 - 20%
30 - 60 43%
14

Marantz PM-17 Specifications

General

Damping Factor	100
Type	Integrated Amplifier
Power Output	60W (8 ohms, 20Hz-20kHz)
Frequency Response	5Hz - 100kHz (+0dB, -3dB)
Signal to Noise Ratio	106dB
Input Sensitivity	200mV/20kOhm (Line)
Total Harmonic Distortion	0.01% (20Hz-20kHz)
Channel Separation	70dB