Adjustments; Fm Tuner Section Adjustment; Am Tuner Section Adjustment - Pioneer XR-A6800 Service Manual

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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 Adjustment
No. Title
Front End
1
Sensitivity
2 Stereo Distortion
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.
AM Tuner Section
• Set the mode selector to AM BAND.
• Connect the wiring as shown in Fig. 1.
Step Adjustment
No. Title
TE
L 13942296513
Front End
1
Sensitivity
Note (∗1) : For the area using 10kHz step, frequency should be 1000kHz.
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FM SG (1kHz, ± 75kHz dev.)
Frequency Level
(MHz) (dBµV)
106 0 to 30
98
80
(ON STEREO)
18 ± 2
98
AM SG (400Hz, 30% Mod.)
Frequency Level
(kHz) (dBµV/m)
999 (∗1) 35 to 45
60cm
AM SG
Center
MPX SG FM SG
FM75Ω antenna terminal
Fig.1 AM and FM Adjustment Wiring Diagram
FM/AM TUNER MODULE
AM
AXX7042
antenna
terminal
YELLOW BLACK
FM L6101
L6105
antenna
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y
terminal
L6102
i
L6103
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2 9
8
Reception
Adjustment
Frequency
Location
Display
L6104
L6105
106MHz
L6102
T6101
98MHz T6101
98MHz VR6201
Reception
Adjustment
Frequency
Q Q
Location
3 6 7 1 3 1 5
Display
T6201
999kHz (∗1)
Loop antenna
AM antenna terminal
Center
PRODUCT
T6201
Pin 20
co
T6101
.
L6104
Fig.2 Adjustment Point
XR-A6800, XR-A4800
9 4 2 8
Specifications
Adjust so that the DC voltage between the
IC6201 - pin 20 and GND becomes at maximum
level.
Minimize the distortion with 1/8 rotation of the
core.
Adjust so that the indicator of TUNED IND.
starts to light up.
Specifications
0 5 8 2 9 9 4 2 8
Adjust so that the DC voltage between the
IC6201 - pin 20 and GND becomes at maximum
level.
DC
Voltmeter
IC6201
m
VR6201
9 9
9 9
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