PIONEER XRA770 III
Instrukcja Serwisowa

XR-A880, XR-A770

6. ADJUSTMENT
6.1 TUNER SECTION
FM Tuner Section

� Set the mode selector to FM BAND. � Connect the wiring as shown in Fig. 1.
Step No. 1 2 Adjustment Title Front End Sensitivity TUNED IND. Lighting Level FM SG (1kHz, ± 75kHz dev.) Frequency (MHz) 98 98 Level (dBµV) 0-30 18 ± 2 Reception Frequency Display 98MHz 98MHz Adjustment Location L6402 T6401 VR6201 Specifications Adjust so that the DC voltage between the IC6201pin 20 and GND becomes at maximum level. Adjust so that the indicator of TUNED IND. starts to light up.

Note: Before adjusting, make sure there is no gap between L6401 and L6402. If there is a gap between them, bring them into contact with each other first, and then make adjustments.

� Set the mode selector to AM BAND. � Connect the wiring as shown in Fig. 1.
Step No. 1 Adjustment Title Front End Sensitivity AM SG (400Hz, 30% Mod.) Frequency (kHz) 999 (�1) Level (dBµV/m) 35-45 Reception Frequency Display 999kHz (�1) Adjustment Location T6201 Specifications Adjust so that the DC voltage between the IC6201pin 20 and GND becomes at maximum level.

AM Tuner Section

Note (�1): For the area using 10kHz step, frequencies should be 1000kHz.

60cm Loop antenna

AM SG

Center

Center

AM antenna terminal

MPX SG

FM SG

PRODUCT

DC Voltmeter

FM75� antenna terminal

Fig. 1 AM and FM Adjustment Wiring Diagram

FM/AM TUNER MODULE
AM antenna terminal

SIDE A

T6201

YELLOW

BLACK AXX7041 IC6201 Pin 20 VR6201 T6401 L6401

FM antenna terminal

L6402

Fig. 2 Adjustment Point
55