Sony ICF-CD863 / ICF-CD863L Service Manual ▷ View online
ICF-CD863/CD863L
10
5
two screws (BVTP3
×
10)
5
two screws (BVTP3
×
10)
6
box (SP) assy
5
two screws
(BVTP3
(BVTP3
×
10)
4
four screws (BVTP3
×
10)
3-10. BOX (SP) ASSY
2
Lift up the AMP board in the
direction of the arrow.
direction of the arrow.
3
connector (CN353)
1
three screws
(BVTP3
(BVTP3
×
10)
ICF-CD863/CD863L
11
3-11. SPEAKER (8.2 cm) (WOOFER) (SP301), BOX (SP)
4
four screws
(PTPWH3
(PTPWH3
×
10)
5
speaker (8.2 cm) (woofer)
(SP301)
(SP301)
3
Remove the speaker lead wire
from the groove of the box (SP).
from the groove of the box (SP).
2
Remove the rubber from the
groove of the box (SP).
groove of the box (SP).
1
cushion box (SP)
6
box (SP)
12
ICF-CD863/CD863L
MW VCO VOLTAGE ADJUSTMENT (CD863L)
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
L4
531 kHz
2.7
± 0.05 V
Confirmation
1602 kHz
9.5
± 1.5 V
LW VCO VOLTAGE ADJUSTMENT (CD863L)
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
CT4
279 kHz
9.0
± 0.05 V
Confirmation
153 kHz
2.35
± 0.5 V
MW TRACKING ADJUSTMENT (CD863L)
Adjust for a maximum reading on level meter
L3-1
621 kHz
CT2
1404 kHz
LW TRACKING ADJUSTMENT (CD863L)
Adjust for a maximum reading on level meter
L3-2
162 kHz
CT3
243 kHz
FM VCO VOLTAGE CONFIRMATION
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
Confirmation
87.5 MHz
3.2
± 0.5 V
Confirmation
108 MHz
10.3
± 1.5 V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1
87.5 MHz
CT1
108 MHz
Adjustment Location: MAIN board (See page 13)
TUNER SECTION
0 dB=1
µ
V
[AM (MW/LW)]
Setting:
Function : RADIO
RADIO BAND button : AM or MW or LW
Function : RADIO
RADIO BAND button : AM or MW or LW
[FM]
Setting:
Function : RADIO
RADIO BAND button: FM
Function : RADIO
RADIO BAND button: FM
• Repeat the procedures in each adjustment several times, and the
tracking adjustments should be finally done by the trimmer ca-
pacitors.
pacitors.
• Remove FM antenna in FM adjustment.
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
4.0
Ω
MAIN board
CN303 pin
CN303 pin
3
MAIN board
CN303 pin
CN303 pin
4
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
MAIN board
CN303 pin
CN303 pin
3
MAIN board
CN303 pin
CN303 pin
4
set
4.0
Ω
0.01
µ
F
MAIN board
TP (GND)
TP (GND)
MAIN board
TP (FM IN)
TP (FM IN)
digital voltmeter
TP (VT)
TP (GND)
100 k
Ω
MAIN board
SECTION 4
ELECTRICAL ADJUSTMENTS
FM STEREO ADJUSTMENT
Setting:
Function: RADIO
RADIO BAND button: FM
Function: RADIO
RADIO BAND button: FM
1. Connect the frequency counter to TP (FMST) and TP (RA-
DIO +B) as shown the figure below.
2. Tune the set to 87.5 MHz (98 MHz).
3. Adjust RV1 for 75.95 to 76.05 kHz reading on the frequency
3. Adjust RV1 for 75.95 to 76.05 kHz reading on the frequency
counter.
Adjustment Location: MAIN board (See page 13)
set
MAIN board
TP (FM IN)
TP (FM IN)
MAIN board
TP (GND)
TP (GND)
0.01
µ
F
Carrier frequency : 87.5 MHz
(98 MHz)
Modulation
: no modulation
Output level
: 0.1 V (100 dB)
FM RF SSG
( ): Except CD863: Canadian model
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1
450 kHz
(
): Italian model
AM VCO VOLTAGE ADJUSTMENT (CD863)
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
L4
530 kHz (531 kHz)
3.0
± 0.05 V
Confirmation
1,710 kHz
9.7
± 1.5 V (9.0 ± 1.5 V)
(1602 kHz)
(
): Italian model
AM TRACKING ADJUSTMENT (CD863)
Adjust for a maximum reading on level meter
L3
580 kHz (621 kHz)
CT2
1,490 kHz (1404 kHz)
33 k
Ω
+
+
–
–
MAIN board
TP (FMST)
TP (RADIO +B)
TP (GND)
frequency counter
1
µ
F/50 V
ICF-CD863/CD863L
13
13
– MAIN BOARD (Conductor Side) –
TP
(FM IN)
TP (FM ST)
TP
(RADIO B+)
1
4
CN303
TP
(GND)
TP
(VT)
– MAIN BOARD (Component Side) –
CT4 LW VCO Voltage Adjustment (CD863L)
L4 AM (MW) VCO Voltage Adjustment
RV1 FM Stereo Adjustment
T1 AM IF
Adjustment
L1
FM RF
CT2
}
Tracking
Adjustment
Adjustment
L3-2 LW Tracking Adjustment
CT3
CT3
}
(CD863L)
L3-1 AM (MW) Tracking
CT2
CT2
}
Adjustment
Adjustment Location:
AUTO BRIGHTNESS ADJUSTMENT
Connecting:
1. Set to power off state.
2. Connect a digital voltmeter to TP (DIMMER) and TP (GND)
2. Connect a digital voltmeter to TP (DIMMER) and TP (GND)
on the LCD board and confirm that the voltage is 0 V.
3. Turn on the power.
4. Connect the digital voltmeter to TP (DIMMER) and TP (GND)
4. Connect the digital voltmeter to TP (DIMMER) and TP (GND)
on the LCD board and adjust RV401 so that the voltage be-
comes 1.5
comes 1.5
± 0.05 V.
5. Turn off the power.
6. Applied sufficient light to IC403 (brightness sensor) on the
6. Applied sufficient light to IC403 (brightness sensor) on the
DIMMER board and confirm that the voltage is 3.3
± 0.3 V.
7. Short the BP404.
Adjustment Location:
digital voltmeter
TP (DIMMER)
TP (GND)
100 k
Ω
LCD board
+
–
– LCD BOARD (Component Side) –
RV401 Auto Brightness Adjustment
– LCD BOARD (Conductor Side) –
TP (GND)
TP (DIMMER)
– DIMMER BOARD (Conductor Side) –
IC403
CD SECTION
CD section adjustments are done automatically in this set.
In case of operation check, confirm that focus bias.
In case of operation check, confirm that focus bias.
FOCUS BIAS CHECK
1. Connect the oscilloscope to TP (RF) and TP (GND) on the CD
board.
2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01)
3. Press the
3. Press the
u
(CD) button.
4. Confirm that the oscilloscope waveform is as shown in the
figure below. (eye pattern)
A good eye pattern means that the diamond shape (
A good eye pattern means that the diamond shape (
◊) in the
center of the waveform can be clearly distinguished.
• RF signal reference waveform (eye pattern)
VOLT/DIV: 0.2 V (with the 10: 1 probe in use.)
TIME/DIV: 500 ns
TIME/DIV: 500 ns
0.8
±
0.2 Vp-p
When observing the eye pattern, set the oscilloscope
for AC range and raise vertical sensitivity.
for AC range and raise vertical sensitivity.
Adjustment Location:
IC701
TP (GND)
TP
(RF)
– CD BOARD (Conductor Side) –
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