Cassette - Grundig ms 4101 Serviceanleitung

Abgleichvorschriften / Adjustment Procedures

Cassette

Test equipment: Frequency Counter, Oscilloscope, Test Cassette 3150Hz/10kHz (z.B. 448)
Adjustment
1.Bias Oscillator Frequency Counter to Testpoint
Insert empty Cassette and start recording.
2. Bias Voltage Insert empty Cassette in Deck 2 and start recording.
Left Channel: Oszilloscope to Testpoint
GND: JCW1-(6)).
Right Channel: Oszilloscope to Testpoint
GND: JCW1-(6)).
3. Playback Level Insert Test Cassette in Deck 1 and play 3150Hz part.
Oscilloscope to Loudspreaker Outputs.
4. Azimuth Deck 1 Oscilloscope to Loudspreaker Outputs.
Insert Test Cassette in Deck 1 and play 10kHz part.
5. Azimuth Deck 2 Oscilloscope to Loudspreaker Outputs.
Insert Test Cassette in Deck 2 and play 10kHz part.
6. Tape Speed Frequency Counter to Loudspreaker Output.
Insert Test Cassette and play 3150Hz part.
2 - 4
Preparation
A
(JCW1-(5)).
B
(JCW1-(1),
B
(JCW1-(4),
Adjustment Procedure
±
a
Adjust JL1 for 105kHz 0.5kHz.
b
Adjust JSR2L for 0.7V (2.0V
rms
c
Adjust JSR2R for 0.7V (2.0V
rms
d
With JSR1L adjust on the left channel the same level
as on the right channel.
e
With Head Screw adjust for maximal and equal level
on both channels.
e
At Tape Direction >> adjust with Head Screw
maximal and equal level on both channels.
At Tape Direction << adjust with Head Screw
maximal and equal level on both channels.
f
Adjust VSR1 (lower Front) for 3150Hz
MS 4101
±
) 0.1V.
pp
±
) 0.1V.
pp
f
for
g
for
g
±
0.1%.
GRUNDIG Service