Dual C 824 Serviceanleitung Seite 11

Adjustment instructions C 824
Signal source Signal source Unit adjustment Indicator Adjustment position Adjustment
adjustment connection Remarks
l i
Azimuth
, -
| =
Test cassette 21 10 kHz
Fe : ON
Аг en Ke
E == Maximum, lock with lacquer
Tape speed
: Frequency counter to E
Test cassette 1
3 150 Hz
Fe : ON
FEDT Motor screw
3 150 Hz, —0.5 %
i =
Playback level
Test cassette 21 400 Hz Dolby-level
Fe :ON
AF-voltmeter to
VR 101
|
200 nWb/m Dolby : ON
OUTPUT LEFT/
VR 101
Adjust to 560 mV
RIGHT
Frequency response
Adjust to level symmetrie
Test cassette 21
400 Hz / 10 kHz
Fe : ON
| AF-voltmeter to
31 10 kHz > 400 Hz
| OUTPUT LEFT/ 11 cut off jumper
RIGHT 10 kHz <400 Hz:
connect jumper
Level indicator
Record Level 560 mV Output
AF generator to 400 Hz Fe ON AF voltmeter to
INPUT LEFT
app. 100 mV
Dolby : ON
OUTPUT LEFT/
VR 102
'Adjust level indicator to
and RIGHT
Record : ON
RIGHT
VR 102 +заь
Oszillator, RF-trap
Metal :ON [Frequency counter to
Record : ON Point D er. Ji
AFA т
ү o L 103
RES L 103
Minimum RF
AF voltmeter to Vd:
OUTPUT LEFT/ Ca
RIGHT
Erasing voltage
T
Met : ON AF -voltmeter to
Record : ON Point D VR 107 180107
RF-magnetic biasing
| Record Level app. 30 mV Output
AF-generator
400 Hz / 10 kHz
AF-voltmeter to
VR 105
Adjust to level symmetrie on
to INPUT LEFT
app. 100 mV
OUTPUT LEFT/
VR 105°
playback at test frequency,
and RIGHT
|
RIGHT
At treble emphasis:
BASFC60
|
Cr :ON
turn clockwise,
|
| Chromdioxid
| Record : ON
|
At trabla deambhaste
| turn counterclockwise
Record level
AF-generator
400 Hz
AF-voltmeter to
Record Level
560 mV Output
to INPUT LEFT app. 100 ጠሃ OUTPUT LEFT/
and RIGHT RIGHT
|
|
o сом
VR 104
i
BASF C 60
Dolby : ON
VR 104"
We
Chromdioxid Record : ON
BASF C 60 Fe ON R 179 *
Super LH Dolby : ON R 179'*
Record : ON R177
|. <ቪ1ያም During test recording don't
Sony C 60 FeCr : ON R173 * change RECORD LEVEL
FeCr Duad Dolby : ON Н 173'*
Record : ON R171 >560 mV: connect resistor *
|. ጸ171" =
ERA ERE He
SON
«PE
560 mV: cut off resistor
Metafine Dolby : ON R 176' *
Record : ON R 174
8 174'
Test cassette 1: Tape speed test cassette 3 150 Hz
Signification: А 179 , J 1 = Left channel
>= greater than...
Test cassette 21: 400 Hz Dolby-level 200 nWb/m
400 Hz —20 db, 10 kHz —20 db
R 179°, J 1° = Right channel
<= less than.