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<TUNER Adjustment>
1. VT Check (AM)
Requirements
•
Measuring instrument: Digital multimeter
Test points: VT, GND
1) Connect the digital multimeter between VT and GND.
2) Set the function to AM, and tune the receiving frequency of the unit at 1710kHz.
3) Check that the digital multimeter ranges under 8.5V.
4) Tune the receiving frequency of the unit at 530kHz.
5) Check that the digital multimeter ranges above 0.6V.
2. VT Adjustment and Check (FM)
Requirements: Same as the above.
1) Connect the digital multimeter between VT and GND.
2) Set the function to FM, and tune the receiving frequency of the unit at 108.0MHz.
3) Adjust L906 so that the digital multimeter ranges at 7.0V±0.1V.
4) Tune the receiving frequency of the unit at 87.5MHz.
5) Check that the digital multimeter ranges under 0.4V.
3. Clock Check (AM)
Requirements
•
Measuring instrument: Frequency counter
Test point: CLK, GND
1) Connect the frequency counter between CLK and GND.
2) Set the function to AM, and tune the receiving frequency of the unit at 1710kHz.
3) Check that the frequency counter ranges at 2160kHz±45Hz.
Summary of Contents for Z-A85
Page 26: ...26 SCHEMATIC DIAGRAM 1 MAIN 1 2 AMP SECTION...
Page 27: ...27 SCHEMATIC DIAGRAM 2 MAIN 2 2 TUNER SECTION...
Page 29: ...29 SCHEMATIC DIAGRAM 3 FRONT DECK...
Page 31: ...31 SCHEMATIC DIAGRAM 4 KEY CD MIC FAN...
Page 33: ...33 SCHEMATIC DIAGRAM 5 PT...
Page 35: ...35 IC BLOCK DIAGRAM...
Page 59: ...2 11 IKENOHATA 1 CHOME TAITO KU TOKYO 110 8710 JAPAN TEL 03 3827 3111 2000068 921338...
