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MASQ RRCD 9100 PLL
Adjustment Procedures
Tuner
Test equipment: Signal Generator, Oscilloscope, Digital Voltmeter
Adjustment
1. LW Oscillator
Digital Voltmeter to Testpoint TP7.
2. MW Oscillator
Digital Voltmeter to Testpoint TP7.
3. AM IF
Couple Signal Generator via Loop Antenna.
f = 450kHz; no modulation
Digital Voltmeter to Testpoint TP5.
4. LW Pre Stage
Couple Signal Generator via Loop Antenna.
no modulation
Digital Voltmeter to Testpoint TP5.
5. MW Pre Stage
Couple Signal Generator via Loop Antenna.
no modulation
Digital Voltmeter to Testpoint TP5.
6. FM Oscillator
Digital Voltmeter to Testpoint TP7.
7. FM Pre Stage
Signal Generator to Aerial Input;
Ue ~ 25dBµV; f
Oscilloscope to CN501(-1) or CN501(-3).
Tape Deck
Test equipment: Oscilloscope, Frequency Counter, Test Cassette 3150Hz/10kHz (e.g. 448A)
Adjustment
1. Tape Speed
Frequency Counter to Loud Speaker.
Play Test Cassette (3150Hz part).
2. Azimuth
Oscilloscope to Loud Speakers.
Play Test Cassette (10kHz part).
3. Bias Frequency
Frequency Counter to CN401(-1) or CN401(-3).
Start recording.
Alignment Layout Tuner
GRUNDIG Service
Preparation
= 1kHz; deviation = 40KHz;
mod
Preparation
Alignment Layout Tape Deck
Abgleichvorschriften / Adjustment Procedures
Adjustment Procedure
At 281kHz adjust T502 for 6.7V
At 1620kHz adjust T501 for 8.2V
Adjust T509 for maximum.
Adjust alternating with LW COIL at 153kHz and with
VC503 at 261kHz for maximum.
Adjust alternating with MW COIL at 558kHz and with
VC502 at 1440kHz for maximum.
At 108,0MHz adjust (bend) L502 for 7.0V
Adjust alternating with L501 (bend) at 88.0MHz and with
VC501 at 106.0MHz for AF Maximum.
Adjustment Procedure
Adjust Motorpoti to 3150Hz ± 10Hz.
With head screw A adjust for
maximal and equal level in both
channels.
±
With L401 adjust for 62kHz
300Hz.
±
0.2V.
±
0.2V.
±
0.2V.
Motorpoti
A
2 - 2
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