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Pin 4 of U9001(12-Pin MTS/SAP HIC) :
Video Signal Process Section on the Main C.B.A.
R7007 :
Demodulator Section on the Main C.B.A.
1. Connect the RF OUTPUT of the MTS/SAP Signal Generator to the Antenna Input
Terminal.
2. Connect the AC Millivolt Meter to Pin 4 of U9001.
3. Adjust R7007 ((MPX) INPUT LEVEL) on the Demodulator Section of the Main C.B.A.
so that the voltage at Pin 4 of U9001 is 150 +- 5mVrms.
Note:
If 100% Modulation in the MTS/SAP signal generator is not available, use the
Alternate SPEC, multiplying the SPEC(150 +- 5mVrms) by the Modulation.
Example :
If the Modulation is 30%, the SPEC should be 45 +- 1.5 mVrms (150 +- 5mVrms x
0.3 = 45 +- 1.5mVrms).
4.4. LOCATION OF TEST POINTS AND ADJUSTMENT POINTS
5. SCHEMATIC DIAGRAMS
5.1. Schematic and C.B.A. Diagram Notes
5.2. Capstan Motor Drive Schematic Diagram
5.3. Main I (Power Supply/System Control/Servo/Operation)
Schematic Diagram (A, C, D, E)
5.4. Main II (Signal Process/Audio) Schematic Diagram (A, C, D,
119
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