Cassette - Grundig UMS 100 Serviceanleitung

Abgleichvorschriften / Adjustment Procedures

Cassette

Test equipment: Frequency Counter, Oscilloscope, Test Cassette 3.15kHz/10kHz (z.B. 448)
Adjustment
Frequency Counter to Testpoint F.
1. Bias Oscillator
Insert empty Cassette and start recording.
2. Bias Voltage Insert empty Cassette and start recording.
Right Channel: Oscilloscope to Testpoint L.
Right Channel: Oscilloscope to Testpoint M.
3. Azimuth Oscilloscope to Loudspreaker Output.
Insert Test Cassette and play 10kHz part.
4. Tape Speed Frequency Counter to Loudspreaker Output.
Insert Test Cassette and play 3.15kHz part.
M
L
F
t s
k
2 - 5
Preparation Adjustment Procedure
Adjust with T301 k for 100kHz
Adjust with VR301 s for 11V
rms
Adjust with VR302 t for 11V
rms
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.
m
With adjustment control (in the cassette motor) set the
±
frequency to 3.15kHz 0.1%.
Bandgeschwindigkeit
Tape Speed
UMS 100
±
5kHz.
±
(31V ) 0.5V.
pp
±
(31V ) 0.5V.
pp
n
GRUNDIG Service