DOWNLOAD Sony ICF-CD853V Service Manual ↓ Size: 2.4 MB | Pages: 39 in PDF or view online for FREE

Model
ICF-CD853V
Pages
39
Size
2.4 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
icf-cd853v.pdf
Date

Sony ICF-CD853V Service Manual ▷ View online

ICF-CD853V
7
3-4.
UPPER  CABINET  ASSY
3-5.
MAIN  BOARD
2
two screws (P3 
×
 10)
1
screw (3 
×
 10)
1
screw (3 
×
 10)
3
4
flexible flat cable (20core)
(CN301)
5
upper cabinet assy
3
MAIN board
2
four screws
(P3 
×
 10)
2
screw (P3 
×
 10)
1
flexible flat cable (14core)
(CN302)
ICF-CD853V
8
3-6.
CD  BLOCK
3-7.
OPTICAL  PICK-UP  DEVICE
(KSS-213R)
3
vibration proof (green)
3
vibration proof (green)
3
vibration proof (red)
3
vibration proof (red)
1
three screws
(2.6 
×
 10)
1
screw (2.6 
×
 10)
4
CD block
2
4
two screws (M2)
3
gear (B)
6
sled shaft
7
flexible flat cable (16core) (CNP701)
8
optical pick-up device
(KSS-213R)
5
1
two claws
1
two claws
2
CD cover
9
ICF-CD853V
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L5
580 kHz
CT1
1,490 kHz
FM/TV (2 – 6 CH) VCO VOLTAGE CONFIRMATION
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
Confirmation
108 MHz
15.0 
±
 1.0 V
Confirmation
TV 2 ch
2.35 
±
 0.1 V
FM/TV (2 – 6 CH) TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L2
TV 2 ch
CT2
108 MHz
TV (7 – 13 CH), WEATHER (1 – 7 CH)
VCO VOLTAGE CONFIRMATION
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
Confirmation
TV 13 ch
10.0 
±
 1.0 V
Confirmation
WEATHER 2 ch
4.6 
±
 0.5 V
TV (7 – 13 CH), WEATHER (1 – 7 CH)
TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L3
WEATHER 2 ch
CT3
TV 13 ch
Adjustment Location: MAIN board (See page 10)
TUNER  SECTION
0 dB=1 
µ
V
[AM]
Setting:
Function : RADIO
RADIO BAND button : AM
[FM/TV]
Setting:
Function : RADIO
RADIO BAND button: FM or TV or WEATHER
• Repeat the procedures in each adjustment several times, and the
tracking adjustments should be finally done by the trimmer ca-
pacitors.
• Remove FM antenna in FM adjustment.
AM RF signal 
generator
30% amplitude
modulation by
400 Hz signal
Output level: 
as low as possible
Put the lead-wire
antenna close to 
the set.
+
level meter
set
4.0 
MAIN board
CN303 pin 
3
MAIN board
CN303 pin 
4
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: 
as low as possible
+
level meter
MAIN board
CN303 pin 
3
MAIN board
CN303 pin 
4
set
4.0 
0.01 
µ
F
MAIN board
TP (FM GND)
MAIN board
TP (ANT)
digital voltmeter
TP (VT)
TP (AM GND)
100 k
MAIN board
SECTION  4
ELECTRICAL  ADJUSTMENTS
FM STEREO ADJUSTMENT
Setting:
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.
3. Adjust RV1 for 75.95 to 76.05 kHz reading on the frequency
counter.
Adjustment Location: MAIN board (See page 10)
set
MAIN board
TP (ANT)
MAIN board
TP (FM GND)
0.01 
µ
F
Carrier frequency : 87.5 MHz
Modulation
: no modulation
Output level
: 0.1 V (100 dB)
FM RF SSG
33 k
+
+
MAIN board
TP (FMST)
TP (RADIO +B)
TP (FM GND)
frequency counter
µ
F/50 V
digital voltmeter
TP (VT)
TP (FM GND)
100 k
MAIN board
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
RV2
1,000 kHz
AM VCO VOLTAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
L1
530 kHz
2.3 
±
 0.05 V
Confirmation
1,710 kHz
8.7 
±
 1.0 V
10
ICF-CD853V
Adjustment Location:
– MAIN BOARD (Component Side) –
L1 AM VCO Voltage Adjustment
L5
AM Tracking Adjustment
CT1 
}
L3
TV (7 – 13 ch)/Weather (1 – 7 ch)
CT3 
}
Tracking Adjustment
CT2
FM/TV (2 – 6 ch) Tracking Adjustment
L2    
}
RV1 FM Stereo Adjustment
RV2 AM IF Adjustment
– MAIN BOARD (Conductor Side) –
TP
(ANT)
TP
(AM GND)
TP
(RADIO +B)
TP
(VT)
TP
(FM GND)
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