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Abgleichvorschriften / Adjustment Procedures
Adjustment Procedures
Tuner
Test equipment: Signal Generator, Oscilloscope, Digital Voltmeter
Adjustment
1. AM Oscillator
AM;
Digital Voltmeter to Testpoint TP1.
2. AM IF
AM;
Couple Signal Generator 450kHz via Loop Antenna;
Ue > 70dBµV; f
Oszilloscope to Loudspeaker Output.
3. AM Pre Stage
AM;
Couple Signal Generator via Loop Antenna;
Ue > 40dBµV; f
Oszilloscope to Loudspeaker Output.
4. FM Oscillator
FM;
Digital Voltmeter to Testpoint TP1.
5. FM Pre Stage
FM;
Signal Generator to FM Aerial Input;
Ue = 20dBµV; f
Oszilloscope to Loudspeaker Output.
Tape Deck
Test equipment: Oscilloscope, Frequency Counter, Test Cassette 3150Hz/10kHz (e.g. 448A)
Adjustment
1. Tape Speed
Frequency Counter to Loudspeaker Output.
Play Test Cassette (3150Hz part).
2. Azimuth
Oszilloscope to Loudspeaker Output.
Play Test Cassette (10kHz part).
3. Bias Frequency
Frequency Counter to CN302(-1).
Start recording.
2 - 2
Preparation
= 1kHz; m = 30%;
mod
= 1kHz; m = 30%;
mod
= 1kHz; deviation = 75kHz;
mod
Preparation
Adjustment Procedure
Adjust with T202 at 1602kHz for 7.5V
Adjust with T201 for AF Maximum.
Adjust alternating with MW COIL (move) at 558kHz and
with VC201 at 1440kHz for AF Maximum.
Adjust with L203 (bend) at 108.0MHz for 7.5V
Adjust alternating with L204 (bend) at 88.0MHz and with
VC202 at 106.0MHz for AF Maximum.
Adjust L208 (bend) alternating at 88.0MHz and at
108.0MHz for AF Maximum (averaging).
Adjustment Procedure
Adjust Motorpoti for 3150Hz ± 10Hz.
A
With Head screw
adjust for maximal
and equal level in both channels.
±
Adjust with T360 for 60kHz
100Hz.
Varixx UMS 4200
±
0.5V.
±
0.5V.
Motorpoti
A
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