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TUNER ADJUSTMENTS
Use a plastic screw driver for adjustments.
Speaker impedance :4 ohm
Standard Output :500 mW
FM MODE switch : STEREO
AM STEP CHANNEL Switch :9 kHz
TUNING
FM : 87.5-108.0
MHz ( 50 kHz step )
AM :531-1,602
kHz ( 9 kHz step )
Fkl
ANTENNA
(75
ohm)
AM LOOP ANTENNA
IL
f%
,
,
I
CN202
•1
@
;&5~NT)
@
CT252
(AM
ANT)
!(2I
/~
:;;5;5C
)
TP205
( H )
J=
TP208
R~y(R-CH)
I
TP206
(GND)
JL465
0'(IP-2::)
R27'01
#C2702
yG;@;/
Modulation
: 1 kHz, Dev. t 22.5 kHz
a. CHECKING
THE
FM BAND
-. .
FM
antenna
: Dummy
75 ohm unbalance
f
Adjusting
Connections
Step
VTVM
Circuit
SG Frequency
Input
Position
of tuning
dial
Adjustment
Oscilloscope
or
output
DC voltmeter
1
Connect
to
Digital
(1.O-2.OV)
Tuning
DC voltmeter
87.5 MHz
Low
end
. . .
( less than
..-
2
coverage
TP 205
(H), TP 206 (G)
108.0
MHz
High
end
---
8.5V )
3
Connect
to
FM Antenna
Connect
to
VTVM,
90.1
MHz
Tracking
90.1
MHz
---
4
Speaker output
Max.
Terminal
106.1
MHz
106.1
MHz
---
).
CHECKING THE
AM
BAND
SG MODULATION
: 1,000Hz, 30%
IRE LOOP ANTENNA
Adjusting
Connections
VTVM
Step
Circuit
SG Frequency
Position
of tuning
dial
Adjustment
Oscilloscopeor
Input
output
DC voltmeter
1
Connect Digital
(1.15 -1.25V)
Tuning
531 kHz
Low
end
L2152
---
DC voltmeter
to
( less than
2
coverage
TP 205 (H), TP 206 (G)
1602
kHz
High
end
"
---
9.OV)
3
Connect
AM
SG
Connect
to
VTVM
612 kHz
612 kHz
L2151
Tracking
4
to Test
Loop
speaker
output
---
1404
kHz
1404kHz
CT252
-7-
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