Read Sony ICF-R45 / ICF-T45 Service Manual online
ICF-R45/T45
6
AM Section
0dB=1
µV
S1: v (EARPHONE)
S3: AM
S3: AM
FM Section
S1: v (EARPHONE)
S3: FM
S3: FM
• 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.
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
CT1–1
1,650kHz
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
600kHz
CT1–2
1,400kHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
75.0MHz
CT1–3
109.5MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L2
75MHz
CT1–4
109.5MHz
FM RF signal
generator
generator
22.5kHz frequency
deviation by 400Hz signal.
Output level : as low as possible
deviation by 400Hz signal.
Output level : as low as possible
set
MAIN board
TP (FM IN)
TP (FM IN)
set
16Ω
v
earphone jack
level meter
SECTION 3
ELECTRICAL ADJUSTMENTS
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.
Connection :
Timer Frequency Check
S3 : AM or FM
1. Confirm that the reading of the frequency counter is in the
standard value.
Standerd value : 538 – 636Hz
L1
CF2
C10
D3
C1
C31
L4
C2
R5
R18
R6
CF1
IC1
1
15
TP
(FM IN)
TP(FM IN)
Connection :
[MAIN BOARD] (SIDE B)
C11
R4
R2
R3
R11
R20
TP
(TIMER)
R13
4
R12
R17
R15
C30
L11
C29
C28
R16
C27
IC2
BLK
1
4
5
8
TP
(TIMER)
Frequency counter
[MAIN BOARD] (SIDE A)
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