Dual C 814 Serviceanleitung Seite 13

v Adjustment instructions C 814
Signal source
Signal source
adjustment
Unit adjustment
Indicator
connection
Adjustment position
Adjustment
Remarks
Azimuth
Test cassette 21 10 kHz Fe : ON
AF-voltmeter to
OUTPUT
Azimuth screw
A
Maximum, lock with
lacquer
Tape speed
Test cassette 1 3 150 Hz Fe : ON
Frequency counter to
OUTPUT
Motor screw 3 150 Hz, —0.5 %
Dolby (only to replace IC 101)
AF-generator to
INPUT LEFT and
RIGHT
19 kHz
app. 100 mV
Fe : ON
Record : ON
AF-voltmeter to
OUTPUT LEFT/
RIGHT
Record Level app. 18 mV Output
Fe :ON
Dolby : ON
Record : ON
VR 301 Adjust to 45 mV
Playback level
Test caszette 21
400 Hz Dolby-level
200 nWb/m
Fe
: ON
Dolby : ON
AF-voltmeter to
OUTPUT LEFT
VR 101
Adjust to 560 mV
OUTPUT RIGHT VR 201
Level indicator
AF-generator to
INPUT LEFT and
RIGHT
400 Hz
app. 100 mV
Fe : ON
Dolby : ON
Record : ON
AF-voltmeter to
OUTPUT LEFT/
RIGHT
Record Level 560 mV Output
VR 104
VR 204
Adjust level indicator
to +3 dB
Oszillator, R F-trap
Metal : ON
Record : ON
Frequency counter to
pin 8 of T 301
T301 105 kHz
AF-voltmeter to
R 150
R250
L 106
L206
Minimum RF
RF-magnetic-biasing
AF-generator to
INPUT LEFT
and RIGHT
400 Hz / 10 kHz
app. 100 mV
BASF C 60
Chromdioxid
Cr
: ON
Record : ON
AF-voltmeter to
OUTPUT LEFT/
RIGHT
Record Level
app. 30 mV Output
VR 105
VR 205
Adjust to level Symmetrie
on playback at test fre-
quency, ,
at treble emphasis:
turn counterclockwise,
at treble de-emphasis:
turn clockwise
Record level
AF-generator to
INPUT LEFT
and RIGHT
400 Hz
app. 100 mV
BASF C 60
Chromdioxid
Cr :ON
Dolby : ON
Record : ON
AF-voltmeter to
OUTPUT LEFT/
RIGHT
Record Level
560 mV Output
VR 103
VR 203
Adjust to 560 mV
Test cassette 1: Tape speed test cassette 3 150 Hz
Test cassette 21: 400 Hz Dolby-level 200 nWb/m
400 Hz —20 db, 10 kHz —20 db
Signification: VR 103 = Left channel
VR 203 = Right channel
13