Electrical Adjustments - Sony ICF-CD2000 Service Manual

TUNER SECTION
[AM (MW)]
Setting:
Band switch : AM (MW)
Put the lead-wire
antenna close to
AM RF SSG
the set.
set
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
[FM]
Setting:
Band switch : FM
MAIN board
FM/SW Telescopic
FM RF SSG
Antenna (ANT1)
0.01 µ F
set
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible
[SW] (ICF-CD2000S)
Setting:
Band switch : SW
MAIN board
FM/SW Telescopic
AM RF SSG
Antenna (ANT1)
0.01 µ F
set
30% amplitude
modulation by 400 Hz
signal
Output level: as low as possible
MAIN board
TP (VT)
• Repeat the procedures in each tracking adjustment several times,
and the frequency coverage and tracking adjustments should be
finally done by the trimmer capacitors.
SECTION 6

ELECTRICAL ADJUSTMENTS

0 dB=1 µV
level meter
32 Ω
+
–
i (headphone) jack (J301)
level meter
32 Ω
+
–
i (headphone) jack (J301)
level meter
32 Ω
+
–
i (headphone) jack (J301)
digital voltmeter
+
–
AM (MW) FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
L13 530 (531) kHz
Confirmation 1,710 (1,602) kHz
AM (MW) TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L7
CT2
no mark: US, CND ( ) : AEP, UK <
FM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part Frequency Display
Confirmation 87.5 MHz <76.0 MHz>
Confirmation 108 MHz <108.0 MHz>
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L14
CT2
SW FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part Frequency Display
L12
Confirmation
SW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L8
CT1
Adjustment Location: MAIN board (See page 16)
AM IF Adjustment
Procedure:
1. Connect the IF swimmer scope as shown below.
2. Set the BAND switch to AM position.
3. Adjust the T1 so that the frequency of IF swimmer scope is
450 kHz and the waveform is symmetric in relation to the maxi-
mum value.
MAIN board
AM (MW) Ferrite-Rod Antenna
(L7)
TP (DET OUT)
Adjustment Location: MAIN board (See page 16)
– 15 –
1.7 V
8.5 V (9.0 V)
no mark: US, CND ( ) : AEP, UK, E, SP, JE
580 kHz (621 kHz) <621 kHz>
1,490 kHz (1,404 kHz) <1,485kHz>
Reading on Digital Voltmeter
2.3 V <1.5 V>
11 V <8.8 V>
no mark: US, CND, AEP, UK <
87.5 MHz
108.0 MHz
Reading on Digital Voltmeter
5.8 MHz 1.75 ± 0.1 V
15.6 MHz 8.5 V ± 1 V
5.8 MHz
15.6 MHz
IF swimmer
0.047 µ F
+
10 µ F
> : E, SP, JE
> : E, SP, JE
ICF-CD2000S
ICF-CD2000S
scope
IN OUT