Read Sony ICF-CD2000 / ICF-CD2000S Service Manual online
– 16 –
FM VCO Adjustment
Setting:
Procedure:
1. Connect the frequency counter as shown the figure below.
1. Connect the frequency counter as shown the figure below.
(Use a frequency counter having high input impedance)
2. Set the BAND switch to FM position.
3. Tune the set to 98 MHz.
4. Adjust RV1 for 76 kHz reading on the frequency counter.
3. Tune the set to 98 MHz.
4. Adjust RV1 for 76 kHz reading on the frequency counter.
Specified Value: 75.5 to 76.5 kHz
Adjustment Location: MAIN board
FM RF SSG
Carrier frequency: 98 MHz
Modulation: no modulation
Output level: 0.1 V (100 dB)
Modulation: no modulation
Output level: 0.1 V (100 dB)
MAIN board
FM/SW Telescopic
Antenna (ANT1)
FM/SW Telescopic
Antenna (ANT1)
0.01
µ
F
+
–
–
IC2
4
(VCO)
R34
27 k
Ω
RV1
TP9
240 k
Ω
frequency counter
FM AUTO SCAN Adjustment
Setting:
Procedure:
1. Connect the tester as shown the figure below.
2. Set the BAND switch to FM position.
3. Tune the set to 98 MHz.
4. Adjust RV2 for +0.275 V reading on the tester.
5. Make sure that the TP429 on LCD board is over 2.4 V.
1. Connect the tester as shown the figure below.
2. Set the BAND switch to FM position.
3. Tune the set to 98 MHz.
4. Adjust RV2 for +0.275 V reading on the tester.
5. Make sure that the TP429 on LCD board is over 2.4 V.
Specified Value: +0.274 to 0.276 V
Adjustment Location: MAIN board
AM AUTO SCAN Check
FM RF SSG
Carrier frequency: 98 MHz
Modulation: no modulation
Output level: 0.1 V (100 dB)
Modulation: no modulation
Output level: 0.1 V (100 dB)
MAIN board
FM/SW Telescopic
Antenna (ANT1)
FM/SW Telescopic
Antenna (ANT1)
0.01
µ
F
+
–
–
LCD board
TP418 (AFC)
TP419 (REG)
Tester
In case of failure, check AM tracking adjustment and AM IF ad-
justment, as there is no place to be adjusted. Also, confirm that the
TP16 on the MAIN board voltage is 3.3 V during auto scan and
the TP429 on the LCD board is over 2.4 V at the reception of AM.
justment, as there is no place to be adjusted. Also, confirm that the
TP16 on the MAIN board voltage is 3.3 V during auto scan and
the TP429 on the LCD board is over 2.4 V at the reception of AM.
Adjustment and Check Location:
– MAIN Board (Component side) –
L12
SW
SW
FREQUENCY
COVERAGE
Adjustment
T1
AM IF
Adjustment
TP
(VT)
TP16
L13
AM (MW)
FREQUENCY
COVERAGE
Adjustment
FM TRACKING CT3
Adjustment L14
Adjustment L14
CT1
L8
L8
RV1
FM VCO
Adjustment
RV2
FM AUTO SCAN
Adjustment
L7
CT2
CT2
AM (MW)
TRACKING
Adjustment
TRACKING
Adjustment
SW
TRACKING
Adjustment
TRACKING
Adjustment
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