Read Sony ICF-CD815 Service Manual online
13
ICF-CD815
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1
455 kHz
AM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part
Frequency Display
L4
520 kHz
CT4
1,750 kHz
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1
600 kHz
CT1
1,400 kHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part
Frequency Display
L3
86.5 MHz
CT3
109.5 MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L2
fmin
CT2
fmax
Adjustment and Connecting Location:
T1
AM IF Adjustment
– TUNER Board (Component Side) –
AM Tracking
Adjustment
L1
CT1
CT1
AM Frequency
Coverage Adjustment
CT4
L4
L4
FM Frequency
Coverage Adjustment
L3
CT3
FM Tracking
Adjustment
L2
CT2
– TUNER Board (Conductor Side) –
TP1
TP2
SECTION 5
ELECTRICAL ADJUSTMENTS
TUNER SECTION
0 dB=1
µ
V
[AM]
Setting:
Function: RADIO
Band: AM
Function: RADIO
Band: AM
[FM]
Setting:
Function: RADIO
Band: FM
Function: RADIO
Band: FM
• Repeat the procedures in each adjustment several times, and
the tracking adjustments should be finally done by the trimmer
capacitors.
capacitors.
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
8
Ω
MAIN board
speaker terminal (CN302)
speaker terminal (CN302)
FM RF signal
generator
75 kHz frequency
deviation by 1 kHz
signal
Output level: as low as possible
deviation by 1 kHz
signal
Output level: as low as possible
+
–
–
level meter
set
8
Ω
0.01
µ
F
TUNER board
TP1
TP1
MAIN board
speaker terminal (CN302)
speaker terminal (CN302)
TP2
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