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Adjustment instructions C 804
Signal source
Signal source
adjustment
Unit adjustment
Indicator
connection
Adjustment position
Adjustment
Remarks
Azimuth
Test cassette 21
10 kHz
Fe : ON
AF-voltmeter to
TP 1
Azimuth screw
A
Maximum, lock with
lacquer
Tape speed
Test cassette 1
3 150 Hz
Fe : ON
Frequency counter to
Motor
TP 1
screw
3 150 Hz, —0.5%
Playback level
Test cassette 21
400 Hz Dolby-level
200 nWb/m
Fe
: ON
Dolby : ON
AF-voltmeter to
TP 1
VR 102
Adjust to 560 mV
AF-voltmeter to
TP 1'
VR 102'
Level indicator
AF-generator to
DIN INPUT
pin 1 and 4
400 Hz
app. 500 mV
via 1 M2
Fe
: ON
Dolby : ON
Record : ON
AF-voltmeter to
TP 1 / TP 1'
Record Level
560 mV to TP 1 / TP 1'
VR 103
VR 103'
Adjust level indicator
to +3 dB
Oszillator, RF-trap
Metal
: ON
Record : ON
Frequency counter to
point D
T301
105 kHz
AF-voltmeter to
TP 2 (R 138)
TP 2' IR 138'1
F 102
F 102'
Minimum RF
RF-magnetic-biasing
AF-generator to
DIN INPUT
pin 1 and 4
400 Hz / 10 kHz
app. 100 mV
via 1 MS2
BASF C 60
Chromdioxid
Cr
: ON
Record : ON
AF-voltmeter to
TP 1 / TP 1'
Record Level
app. 30 mV to TP 1/TP 1'
VR 105
VR 105'
Adjust to level symmetrie
on playback at test fre-
quency,
at treble emphasis:
turn clockvvise,
at treble de-emphasis:
turn counterclockwise
Record level
AF-generator to
DIN INPUT
pin 1 and 4
400 Hz
app. 100 mV
via 1 MS2
BASF C 60
Chromdioxid
Cr
:ON
Dolby : ON
Record : ON
AF-voltmeter to
TP 1 / TP 1'
Record Level
560 mV to TP 1 /TP 1'
VR 104
VR 104'
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 103' = Right channel
5
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