Adjustment - Pioneer GEX-P900DAB Service Manual

6. ADJUSTMENT

- Connection Diagram
MAIN UNIT
L473
L503
Equipment required:
• Head unit
• SG: Capable of outputting sine waves up to 1.5 GHz (no modulation function is required)
• DMM
• Adjustment stick (with flat tip)
1. VCO ADJUSTMENT
1) Connect the GEX-P900DAB to a DC regulated power supply. Connect the head unit and the GEX-P900DAB with an
IPBUS cable.
2) Set the power to ON, and enter DAB Service mode.
3) Set frequency to 13 F.
4) Check R556 on the side where P1 is located (the side not in contact with D551) with DMM (1) so that VT (tuning
voltage) can be measured. Adjust air-core coil (L553) so that VT is 7.00 V.
5) Set frequency to 5 A, and confirm that VT is within the range from 1.2 to 1.7 V.
L475
L477
L553
R556
L505
L507
DMM(1)
Pin 7
IC391
DMM(2)
GEX-P900DAB
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