Service manual

25
RX-V595a/HTR-5150/RX-V595aRDS
GND
AM loop antenna
AM ANT
TUNER
P.C.B
AM SG
AM
dummy
antenna
ACVM
DIST. M
Oscilloscope
L
R
REC
OUT
● Connection diagram (Measuring instruments)
1) Adjustment of sensitivity.
AM Adjustment (This should be done after FM adjustment.)
Step Adjustment item Signal (ANT IN) Test point Rating
Reception
frequency
Adjustment
point
1
Adjustment of
sensitivity
(630kHz)
AM ANT
630kHz
50dBµ
1kHz
30% modulation
630kHz
(B-1)
REC OUT Audio output should be maximized.
Repeat steps 1 and 2.
2
Verification of
sensitivity
AM ANT
630kHz
1080kHz
1440kHz
30% modulation
630kHz
(B-1)
1080kHz
(B-2)
1440kHz
(B-3)
AM ANT
Auto reception should be available
when the tuning key is moved UP
and DOWN.
Audio must be muted during
search.
4
Verification of
auto tuning
AM ANT
60dBµ
Distortion should be 10% or less at
each frequency.
Check to ensure that the voltage at
the ANT terminal is 54dBµ or less.
Execution of FACTORY PRESET (Refer to page 20.) will facilitate setting reception frequency for adjustment.
See page 22 for TP locations & adjustment points.
T2
All signal meters should light.
3
Verification of
signal meter
AM ANT
1080kHz
90dBµ
MONO
1 kHz
30% modulation
1080kHz
(B-2)
All signal meters should turn OFF.
–10dB or less