Sony ICF-C103L - Section 2 Electrical Adjustments

SECTION 2
ELECTRICAL
ADJUSTMENTS
AM IF ADJUSTMENT
Adjust for a maximum reading on VTVM.
MW/LW Section
Seta Note: Receive 531kHz.
MW antenna close to Frequency
the set. Part Display voltmeter
——— (confirmation) 531kHz More than 1.5V
‘| (Standard 1.7V)
30 % amplitude
:
1,602kHz
8.5V
400Hz signal Note: Not use the AM RF signal generator in this adjustment.
Output level: as low as possible
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on VTVM.
1,404kHz 621kHz
FM RF signal
—
Part Display voltmeter
(C.- FM ANT (Receive 281kHz)
terminal (confirmation)
153kHz More than 1.0V
+22.5kHz frequency deviation (Standard 1.1V)
by
400Hz
signal
Note
:
Not
use
the
AM
signal
generator
in
this
adjustment.
Output level: as low as possible
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on VTVM.
cra
FM VCO VOLTAGE ADJUSTMENT
Adjustment Frequency Reading on Digital
Part Display voltmeter
87.5MHz More than 1.8V
(Standard 2,2V)
capacitors. . Note: Not use the FM signal generator in this adjustment.
speaker terminal
e Repeat the procedures in each adjustment several times,
and the tracking adjustments should be fimally the trimmer
FM TRACKING ADJUSTMENT
Adjustment Location : Adjust for a maximum reading on VTVM.
108MHz 87.5MHz
(MAIN BOARD] —COMPONENT SIDE— [KEY BOARD] —CONDUCTOR SIDE—
a
Late
ac
ote
1
digital
voltmeter
IC1
L5
MW VCO
VOLTAGE
Adjustment
FM
~Y) Ld F=~—— 3-1 > TRACKING
FM VCO Adjustment
VOLTAGE eee
©&) Adjustment (S)
LW
VCO
MW
LW
MW
LW
nanan
ne
VOLTAGE
TRACKING
|
TRACKING
TRACKING
TRACKING
—————
Adjustment
Adjustment
Adjustment
Adjustment
Adjustment