Yamaha DSP-AX1/RX-V1 Service Manual page 35

Step Adjustment item
6 Adjustment of
front end IFT
7 Verification of monau-
ral distortion
8 Verification of stereo
distortion
9 Verification of sensi-
tivity
10 Adjustment of
Separation
11 Adjustment of Signal
meter
12 Verification of auto
tuning
* : Execution of PRESET (Refer to page 27.) will facilitate setting reception frequency for adjustment.
Reception
Signal (ANT IN)
frequency
98.1MHz
FM ANT (75Ω)
98.1MHz ± 5kHz
* (A-4)
30dBµ
MONO
1kHz,
100% modulation
98.1MHz
FM ANT (75Ω)
* (A-4)
98.1MHz
70dBµ
MONO 1kHz,
100% modulation
98.1MHz
FM ANT (75Ω)
* (A-4)
98.1MHz
* Tuning
70dBµ
mode
Stereo L or R
should be
1kHz,
AUTO.
100% modulation
88.1MHz
FM ANT (75Ω)
* (A-6)
88.1MHz
98.1MHz
98.1MHz
* (A-4)
106.1MHz
106.1MHz
MONO 1kHz
* (A-7)
100% modulation
98.1MHz
FM ANT (75Ω)
* (A-4)
98.1MHz
70dBµ
Stereo L or R
1kHz,
100% modulation
98.1MHz
FM ANT (75Ω)
* (A-4)
98.1MHz
45dBµ
MONO 1kHz
30% modulation
–10dBµ or less
98.1MHz
FM ANT (75Ω)
98.1MHz
26dBµ
Stereo L or R
1kHz,
30% modulation
Adjusted
Test point
point
Front end IFT Pin 16 of IC1
REC OUT L, R
REC OUT L, R
ANT (75Ω)
VR2 REC OUT L, R
VR1
DSP-AX1/RX-V1
Rating
Adjust so that the DC voltage
is maximum.
CAUTION : Over-adjustment
of the IFT core will reduce the
sensitivity.
Maximum ±90°
0.4% or less
1% or less
• STEREO indicator should
light.
1) Set the tuning mode to
MAN'L MONO. (Muting OFF)
2) S/N should be 30dB at each
frequency of 88.1MHz,
98.1MHz, and 106.1MHz.
3) Check to ensure that the
voltage at the ANT terminal
is 5dBµ or less.
(A only : 7dBµ or less)
With SSG output at L or R, the
signal leakage level at the
other channel should be mini-
mized.
35dB or more
Adjust so that all segments
light.
Check to ensure that signal
meters turn OFF.
• Automatic reception
should be available when
the tuning key is moved UP
and DOWN.
• The stereo indicator should
light.
• Audio muting should be ap-
plied during tuning.
36