Abgleichvorschriften / Adjustment Procedures
UMS 200
2 - 5
GRUNDIG Service
Cassette
Test equipment:
Frequency Counter, Oscilloscope, Test Cassette 3.15kHz/10kHz (e.g. 448)
Adjustment
Preparation
Adjustment Procedure
1. Bias Oscillator
2. Bias Voltage
3. Azimuth
4. Tape Speed
Frequency Counter
to
Testpoint
F
.
Insert empty Cassette and start recording.
Insert empty Cassette and start recording.
Right Channel:
Oscilloscope
to
Testpoint
L
.
Left Channel:
Oscilloscope
to
Testpoint
M
.
Oscilloscope
to
Loudspreaker Output
.
Insert Test Cassette and play 10kHz part.
Frequency Counter
to
Loudspreaker Output
.
Insert Test Cassette and play 3.15kHz part.
Adjust with
T301
k
for
100kHz
±
5kHz
.
Adjust with
VR301
s
for
11V
rms
(31V
pp
)
±
0.5V
.
Adjust with
VR302
t
for
11V
rms
(31V
pp
)
±
0.5V
.
Adjust at “
TAPE >
“ with
Head Screw
m
for
maximal
and
equal level
on both channels.
Adjust at “
TAPE <
“ with
Head Screw
n
for
maximal
and
equal level
on both channels.
With adjustment control (in the cassette motor) set the
frequency to
3.15kHz
±
0.1%
.
m
n
k
t s
F
L
M
Bandgeschwindigkeit
Tape Speed
