Fm Tuner Section; Am Tuner Section - Pioneer XC-IS21T Service Manual

XC-IS21T
6.3 TUNER SECTION

6.3.1 FM TUNER SECTION

Set the mode selector to FM BAND.
Connect the wiring as shown in Fig. 6-5.
Adjustment
Step No.
Title
Front End
1
Sensitivity
TUNED IND.
2
Lighting Level
Note: Before adjusting, make sure there is no gap between L6101 and L6102 . If there is a gap between them, bring them into contact with
each other first, and then make adjustments.

6.3.2 AM TUNER SECTION

Set the mode selector to AM BAND.
Connect the wiring as shown in Fig. 6-5
Adjustment
Step No.
Title
Front End
1
Sensitivity
∗1: For the area using 10 kHz step, frequencies should be 1000 kHz.
FM/AM TUNER MODULE
AM
antenna
terminal
FM
antenna
terminal
56
FM SG (1kHz, ±75kHz dev.) Reception
Frequency Level
(MHz) (dBµV)
98 0 – 30
18 ± 2
98
AM SG (400Hz, 30% Mod.)
Frequency Level
(kHz) (dBµV/m)
999* 1 35 – 45
AM SG
Center
MPX SG FM SG
FM75Ω antenna terminal
Fig. 6-5AM and FM Adjustment Wiring Diagram
SIDE A
YELLOW BLACK
AXX7041
L6401
Adjustment
Frequency
Location
Display
L6402 Adjust so that the DC voltage between the IC6201-
98MHz
T6401 Pin 20 and GND becomes at maximum level.
Adjust so that the indicator of TUNED IND. starts
98 MHz
VR6201
to light up.
Reception
Adjustment
Frequency
Location
Display
Adjust so that the DC voltage between the IC6201-
999 kHz* 1 T6201
Pin 20 and GND becomes at maximum level.
60cm
Loop antenna
AM antenna terminal
Center
PRODUCT
T6401
Fig. 6-6 Adjustment Point
Specifications
Specifications
DC
Voltmeter
T6201
IC6201
Pin 20
VR6201