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UMS 200
CD
Test equipment: Oscilloscope, Digital Voltmeter, Test CD
Adjustment
Oscilloscope to Testpoints H and I (GND).
1. RF Gain
Insert CD and start Play.
Oscilloscope to Testpoints J and I (GND).
2. EF Balance
Insert CD and start Play.
Press and hold depressed the button T.
Digital Voltmeter to Testpoints J and I (GND).
3. Tracking Offset
CD STOP.
Set VR4 to Center Position.
GRUNDIG Service
Preparation
J
H
Abgleichvorschriften / Adjustment Procedures
Adjustment Procedure
With VR1 i adjust for maximum Signal.
With VR2 j adjust for symmetric Signal.
With VR3 u adjust for 0V
With VR4 r adjust for 0V
j
u r
I
i
A
A=B
B
±
100mV.
±
5mV.
2 - 6
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