Werbung
through
Prior to any measurements and adjustments, the heads and the capstan shafts should be degaussed.
Uniess otherwise specified:
Micro-switch S 805 and HIGH COM-swilch S 806 in 0-position (middle position);
OSC-switch S 802 in position: left (seen on cabinet rear part); S 302 in position AUX
electrical measurements and adjustments,
Adjustment of
drive level
indication.
+)
10 Lk 80
OSC-Switch: position teft.
Adjustable with 1. 610/811/812
i
AT -signal
generar
OSC-switch: position night
EEN
Connect ine AF-signal gono.
Setthe instrumen:
| Setting and adjustment should
rator to ВИ 302 (3-2 resp. 5-2)
Pointer to 0 dB.
be carried trough by means of
Set
no input voltage lo а
frequency
of 333 Hz and try to
obtain a level moasuromont of
800 mV from M ВОЗ resp. from
M 1803.
100 сиси! board-fited resistors
Я 849 авс В 1849.
R 824/1824 (суб! control)
approx. middle position.
10 | madule
Adjustment of
УТУМ,
Operational mode:
blasing current
(о ё 100 kHz)
1. Meta!
1200 uA & 12 mV
table by C 835 and C 1835
!
Emply cassette.
2 Ре
380 uA ^ 3,8 ту
table бу R 874
3.
С т о ;
600 А à 8,0 mV | Adjustable
by А 873
7
2.
Connect the УТУМ to M 810
(Approx. value)
resp. M 1810-M 812.
Measurament of
1}
AF-signal
Connect а 47 каї point 1-2 and | The values should | Both the channels should be
the overall
ten
tor.
4-2 of BU 302. (Cm < 50 pf
be within ће tole- | measured individualy arc
frequen
H
273
Connect the AF-signal gene-
rance field
separately.
response (ovar
and
Етр Ch
rator
to BU 302 (3; GC
DIN 45500
When exceeding the rated
tape).
)
casselle (e. g.
the УТУМ to
tolerance flelc, repeat meas-
C401R)
1-2 respectively
4-2).
urement 7 once again.
rd the test frequencies of
R 824/1825 (level control)
333 Hz and о! 40 Hz as well as
approx, middle position.
912 5«Hz/ - 25 dB (refered lo
8
9 dB of instrument
et 333 Hz)
and measure ле playback
voltages.
Approx. value: 4-1 dB al 12 6 kHz
referad to 333 H7.
Fuil modulation | -< +)
AF-siqnal
The recording current that паз
Ча 600mV
+ 188 | Setting and adjustment
злос
| adiustment (ог
then
generator.
a testing frequency of 323 Hz
be carried through су means ct
self-recording.
gi
Утум.
should be set and adjusted in
{he rosistors А 826 and А 1846.
g | (Becording
and
such a manner tha: in the ріву-
1 current).
у
back mode о! а tully modulated
record (with Ino noıcalors set to
9 dB) at M ВОЗ and/or M 1803 à
maximum level of 600 mV can
be measured.
Checking the
П
The noise will be remarkably
High-Com-
Pause
reduced,
Werbung
