Tuner Section; 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
Stereo Distortion
2
TUNED IND.
3
Lighting Level
Note: Before adjusting, make sure there is no gap between L6101 and L6102 as well as between L6103 and L6104. 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.
AM
antenna
terminal
FM
antenna
terminal
56
FM SG (1kHz, ±75kHz dev.) Reception
Frequency Level
(MHz) (dBµV)
106 0 – 30
98
80
(ON STEREO)
98 18 ± 2
AM SG (400Hz, 30% Mod.)
Level
Frequency
(kHz) (dBµV/m)
999* 1
35 – 45
60cm
AM SG
Center
MPX SG FM SG
FM75Ω antenna terminal
Fig. 6-5 AM and FM Adjustment Wiring Diagram
FM/AM TUNER MODULE (AXQ7058)
AXX7042
YELLOW BLACK
L6101
L6105
L6102
L6103
Adjustment
Frequency
Location
Display
L6104 Adjust so that the DC voltage between the IC6201-
106 MHz
L6105 Pin 20 and GND becomes at maximum level.
L6102
T6101
98 MHz Minimize the distortion with 1/8 rotation of the
T6101
core.
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.
Loop antenna
AM antenna terminal
Center
PRODUCT
T6201
T6101
L6104
Fig. 6-6 Adjustment Point
Specifications
Specifications
DC
Voltmeter
VR6201