Read Sony ICF-C218 (serv.man2) Service Manual online
7
ICF-C218
SECTION 3
ELECTRICAL ADJUSTMENTS
AM Section
0dB=1
µ
V
Procedure :
BAND
: AM
VOLUME
: 10mW
FM Section
Procedure :
BAND
: FM
VOLUME
: 10mW
• Repeat the procedures in each adjustment several times, and
the frequency coverage and tracking adjustments should be
finally done by the trimmer capacitors.
finally done by the trimmer capacitors.
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
455kHz
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
520kHz
CT1-4
1,750kHz
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
620kHz
CT1-1
1,400kHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
86.5MHz
CT1-3
109.5MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
confirm
86.5MHz
CT1-2
109.5MHz
TUNER SECTION
AM RF signal
generator
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
signal.
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
FM RF signal
generator
generator
22.5kHz frequency deviation by
400Hz signal.
Output level : as low as possible
400Hz signal.
Output level : as low as possible
antenna
terminal
TP1(RF IN)
terminal
TP1(RF IN)
0.01
µ
F
set
8
Ω
speaker terminal
level meter
Click on the first or last page to see other ICF-C218 (serv.man2) service manuals if exist.