25
RX-V795a/RDS/HTR-5170
RX-V795a
/
RDS
HTR-5170
AM Adjustment
(This should be done after FM adjustment.)
●
Connection Diagram (Measuring instruments)
1) Adjustment of sensitivity
Reception
frequency
630kHz
* (B-1)
630kHz
* (B-1)
1080kHz
* (B-2)
1440kHz
* (B-3)
1080kHz
* (B-2)
Adjustment
point
T2
Signal (ANT IN)
AM ANT
630kHz
50dB
µ
1kHz
30% modulation
AM ANT
630kHz
1080kHz
1440kHz
30% modulation
AM ANT
1080kHz
90dB
µ
MONO
1kHz
30% modulation
–10dB
µ
or less
AM ANT
60dB
µ
Test point
REC OUT
REC OUT
Adjustment item
Adjustment of
sensitivity
Verification of
sensitivity
Verification of signal
meter
Verification of auto
tuning
Step
1
2
3
4
Rating
Audio output should be
maximized.
Repeat steps 1 and 2.
Check to ensure that the voltage at
the ANT terminal is 54dB
µ
or less.
All S-meters should light.
All S-meters should turn off.
Auto reception should be avail-
able when the tuning key is moved
UP and DOWN.
Audio must be muted during
search.
See page 22 for TP locations & adjustment points.
* : Execution of FACTORY PRESET (Refer to page 16.) will facilitate setting reception frequency for adjustment.
GND
AM loop antenna
AM ANT
TUNER
P. C. B.
AM SG
AM
Dummy
Antenna
ACVM
DIST. M
Oscilloscope
L
R
REC
OUT