Adjustment - Pioneer VSX-C550-S Service Manual

5

6. ADJUSTMENT

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Notice) Even if it removes TUNER, other functions operate.
AM Tuner Section
• There is no adjustment in the AM tuner.
FM Tuner Section
• Set the mode selector to FM BAND.
• Connect the wiring as shown in Fig. 1.
Step Adjustment
No. Title
T-METER
1
Adjustment
TE
L 13942296513
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ANT. Input level and signal condition
Frequency
Modulation
(MHz)
98 OFF
MPX SG
FM75Ω antenna terminal
Fig.1 Adjustment Wiring Diagram
U
FM/AM TUNER MODULE
IC201
Fig.2 Adjustment Point
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8
Input Level Adjust
(dBµV)
point
L201
80
PRODUCT
FM SG
Q Q
3 6 7 1 3 1 5
L201
pin 21 pin 23
SIDE B
co
.
VSX-C100-S
7
9 4 2 8
Adjustment
Contents
Adjust L201 so that the DC voltage between
Pin 21 and Pin 23 of IC201 (Test point Vtm)
gets within 0 ± 50mV.
DC
Voltmeter
0 5 8 2 9 9 4 2 8
m
7
8
9 9
A
B
C
9 9
D
E
F
53
8