Read Sony ICF-F11S / ICF-F12S Service Manual online
ICF-F11S/F12S
6
SECTION 4
ELECTRICAL ADJUSTMENTS
0 dB=0.280 µV
[MW]
Setting:
BAND switch : MW
Setting:
BAND switch : MW
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level:
as low as possible
Put the lead-wire
antenna close to
the set.
+
–
level meter
set
4
Ω
MAIN board
TP (SP –)
MAIN board
TP (SP +)
[SW]
Setting:
BAND switch: SW
Setting:
BAND switch: SW
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level:
as low as possible
+
–
level meter
MAIN board
TP (SP –)
MAIN board
TP (SP +)
set
4
Ω
10 pF
MAIN board
TP (GND)
MAIN board
TP (ANT)
[FM]
Setting:
BAND switch: FM
Setting:
BAND switch: FM
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz
signal
Output level:
as low as possible
+
–
level meter
MAIN board
TP (SP –)
MAIN board
TP (SP +)
set
4
Ω
0.01
µF
MAIN board
TP (GND)
MAIN board
TP (ANT)
• Repeat the procedures in each adjustment several times, and
the tracking adjustments should be fi nally done by the trimmer
capacitors.
capacitors.
• Remove FM antenna in FM adjustment.
MW/SW IF ADJUSTMENT
Adjustment for a maximum reading on level meter
T1
455 kHz
MW FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part
Frequency Display
L5
520 kHz
CT1-2
1,650 kHz
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1
600 kHz
CT1-1
1,400 kHz
no mark: F11S
( ): F12S
SW FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part
Frequency Display
L6
2,200 kHz (5,800 kHz)
CT3
7,600 kHz (18,250 kHz)
no mark: F11S
( ): F12S
SW TRACKING ADJUSTMENT
Adjust for maximum reading on level meter
L2
2,200 kHz (5,800 kHz)
(CT2)
(18,250 kHz)
FM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part
Frequency Display
L4
86.5 MHz
CT1-4
109.5 MHz
no mark: F11S/F12S: E model
[ ]: F12S: Saudi Arabia model
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L3 [L9 and L10]
86.5 MHz
CT1-3
109.5 MHz
Adjustment Location: MAIN board (See pages 7 and 8)
Ver. 1.2
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