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Abgleichvorschriften / Adjustment Procedures
Adjustment
12. Field strength
Connect a Test Generator to aerial input; Frequency
95.0MHz; no modulation; E´ = 70µV (37dBµV).
Connect a DC Voltmeter between FMP101 (+) and
FMP103 (-).
13. Stereo Crosstalk
Connect a Test Generator via a Stereo Coder to aerial
input;
Frequency 94.8MHz;
f
1kHz at 22.5kHz dev.;
mod
Pilot 19kHz at 7.5kHz dev.;
RDS 57kHz at 1.2kHz dev.; E´ = 1mV (60dBµV);
modulate only the left channel.
Connect an AF Voltmeter to loudspeaker output right
channel.
Call up the extended expert mode (see above).
Select parameter 73.
14. FM search level
Connect a Test Generator to aerial input; Frequency
stop
95.1MHz; no modulation;
Call up the extended expert mode (see above).
Apply a signal with E´ = 80
Apply a signal with E´ = 8
2. Cassette Drive
Test equipment: Frequency Counter, Test Cassette 3150Hz (e.g. 448A)
Adjustment
Tape Speed
Connect Frequency Counter to Loudspeaker Output.
Play Test Cassette 3150Hz.
AM
Kabel
50Ω
37.5Ω
EMK
8
Preparation
µ
µ
V (38dB
V). Set DX to OFF.
µ
µ
V (18dB
V). Set DX to ON.
Preparation
For adjustment use the aerial dummies for AM resp. FM
E´= EMK - 26dB
E´
55Ω
15pF
Adjustment Procedure
Adjust with CR26 for +300mV
Set the parameter value for minimum AF voltage.
Change Parameter value 05 until search just stops.
Change Parameter value 04 until search just stops.
Adjustment Procedure
With Motorpoti adjust for 3150Hz.
PCB
FM
Kabel
50Ω
10Ω
EMK
MS 502
±
10mV.
Motorpoti
E´= EMK - 6dB
E´
45Ω
10nF
GRUNDIG Service
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