Read Sony ICF-R40 Service Manual online
– 6 –
[FM]
Setting:
POWER switch: AUTO OFF
Band switch: FM
Output select switch:
POWER switch: AUTO OFF
Band switch: FM
Output select switch:
@ (earphone)
[AM]
Setting:
POWER switch: AUTO OFF
Band switch: AM
Output select switch:
POWER switch: AUTO OFF
Band switch: AM
Output select switch:
@ (earphone)
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
done by the trimmer capacitors.
Adjustment Location:
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
75 MHz
CT1-3
109.5 MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L2
75 MHz
CT1-4
109.5 MHz
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
455 kHz
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
515 kHz
CT1-1
1,650 kHz
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
600 kHz
CT1-2
1,400 kHz
SECTION 4
ELECTRICAL ADJUSTMENTS
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible
deviation by 400 Hz
signal
Output level: as low as possible
+
–
–
level meter
@
(earphone) jack (J1)
set
TP
(FM IN)
16
Ω
0.01
µ
F
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
modulation by
400 Hz signal
Output level: as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
+
–
–
level meter
set
16
Ω
@
(earphone) jack (J1)
CT1-4
L2
L2
FM Tracking Adjustment
CT1-3
L3
L3
CT1-2
L1
L1
AM Frequency Coverage
Adjustment
CT1-1
T1
AM IF Adjustment
L4
AM Frequency Coverage Adjustment
TP (FM IN)
J1
@
(earphone) jack
– MAIN BOARD (Component Side) –
FM Frequency Coverage
Adjustment
AM Tracking Adjustment
0 dB=1 µV
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