Grundig Scenos UMS 6400 DVD, Service Manual

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GRUNDIG Service SCENOS UMS 6400 DVD
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Adjustment Procedures
Tuner
Test equipment: Sweep / Signal Generator, Distortion Meter, Oscilloscope, Digital Voltmeter
Adjustment Preparation Adjustment Procedure
1. AM IF
2. AM Oscillator
3. AM Band Pass
4. AM-AFC
5. FM-Det.
AM, 522kHz;
Couple Sweep Generator 450kHz via Loop Antennas;
Ue > 60dB
µ
V;
Oscilloscope to Testpoint TP009/TP008.
AM, 1620kHz;
Digital Voltmeter to Testpoint TP001.
AM, 603kHz/1404kHz;
Couple Signal Generator via Loop Antennas;
Ue > 50dB
µ
V; f
mod
= 1kHz;
Oscilloscope to Testpoint TP009/TP008.
AM, 522kHz;
Couple Signal Generator 450kHz via Loop Antennas;
Digital Voltmeter between TP017 and TP018.
FM, 98.0MHz
Signal Generator to FM Aerial Input;
Short circuit TP019 and TP020;
Digital Voltmeter between TP017 and TP018.
Adjust with T101 and T102 for Maximum.
Adjust with T105 for 8V
±
0,2V.
Adjust alternating with T104 at 603kHz and with CT101 at
1404kHz for AF Maximum.
Adjust with T103 for 0V
±
1mV.
Adjust with T107 for 0V
±
1mV.