Dual C 844 Serviceanleitung Seite 15

Adjustment instructions
C
844
Signal sorce
Signal
source
adjustment
Unit adjustment
I
n
di
cator
con
nection
Adjustment position
Adjustment
R
ema
rks
Azimuth
Test cassette 21
10 kHz
Fe:ON
AF-voltmeter to
OUTPUT
Azimuth
screw
Maximum,
lock
with
lacquer
Tape speed 9,5
cm/s, 4,75 cmls
Test
cassette
1
31
5O Hz
Fe:ON
Double Speed
:
ON
Frequency counter
to
OUTPUT
O
vR
403
6300 Hz.
-
O.5
o/o
Double
Speed
:
OFF
(c)
VR 402
3150
Hz, -O,5o/o
Porner
: ON
Frequency
counter to
@ Point
O R
o
VR
401
Adjust
to
1
050
Hz
AF4enerator
to
I
NPUT
LEFT
and
RIG
HT
4OO Hz
app.100
mV
Fe
:ON
Record :
ON
AF-voltmeter
to
@
+81,
Record Level
Adjust
to
580 mV
AF
-voltmeter to
@
+3t
@
vH
133,
Adjust
to
58O
mV
Test cassette
21
4O0
Hz Dolby-level
200 nWb/m
tra
Plav
ON
ON
AF-voltmeter to
@
lE3,
^
VR 502
\ö/
vR
so2'
Adjust
to
580
mV
AF-voltmeter to
@
+3i,
@
vH
l3i
Adjusr
to
580
mV
Playback
level
4O0
Hz Dolby-level
20O
nWb/m
Fe:
ON
AF-voltmeter
to
OUTPUT LEFT/
R
IGHT
VR 502
\e,
vR
502'
Adjust to
550 mV
Level
indicator VU, Peak LED
AF
generator
tO INPUT LEFT
and
R
IGHT
400
Hz
app. 100
mV
Fe ON
Record :
ON
AF-voltmeter
to
OUTPUT
LEFT/
R
IGHT
Record Level
550
mV Output
@
vR
211
vR
271
VU-indicator
adjust
ro
0
db
vu
AF{enerator to
INPUT
LEFT
INPUT
RIGHT
Cr
ON
Record
:
ON
VR
503
!8/
VR
503,
LE
D-indicator
adjust
to
150
%
Oszillator,
R
F-traps
Metal
Record
ON
ON
Frequency
counter
@
toR653
@
oscl
124
k{z
AF-voltmeter to
65
rP4
TP5
161
T502
r
50-?'
Minimum
HF
Metal
:
ON
Monitor:
ON
Record :
ON
AF
-voltmeter to
OUTPUT
LEFT/
RIGHT
161
T501
T
501',
Erasing voltage
{
RFfiagnetlc Ha.hg
Metal
Record
oNl
oN l@
AFge nerato r
tO INPUT
LEFT
and
R
IGHT
40O
Hz
I
10
k{z
app.
100 mV
BASF C-401
R
or
BASF
C
60
Chromdioxid
Cr
ON
Record :
ON AF
-voltmeter
to
OUTPUT
LEFT/
R
IGHT
Record Level
app. 30 mV Output
LT
Monitor
Record
ON
ON
ON
VR
505
{6J
vR sob'
Adjust to
level
symmetrie
o
playback at test frequency
At treble
emphasis:
turn clockwise
At
treble
deemphasis:
tu rn counterclockwise
Record
Level
AF
generator
to
INPUT LEFT
and
R
IGHT
400
Hz
app.100
mV
BASF
C
60
Chromdioxid
Cr
ON
Record :
ON
AF-voltmeter to
OUTPUT LEFT/
R
IGHT
550
mV Output
Cr
:ON
Monitor:
ON
Record
: ON
VR
5O4
\8'
vR
5O4'
Adjust
to
550
mV
Test cassette
Test cassette
1:
21:
Tape speed
test
cassette 3
1
50 Hz
400 Hz Dolby-level
2OO
nWb/m
4OO
Hz
-
20
db,
1
0 kHz
- 2O
db
Signif
ication:
B 179,
R 179:
Left channel
Right
channel
@
=
Amplifier
board
@
= Controller Board
@
= Noise
Reduction Board
@ =
Monitor
Board
14