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

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)
ICF-CD853V
11
11
CD SECTION
CD section adjustments are done automatically in this set.
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
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 (
) 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
0.8 
±
 0.2 Vp-p
When observing the eye pattern, set the oscilloscope 
for AC range and raise vertical sensitivity.
Adjustment Location:
IC701
TP (GND)
TP
(RF)
– CD BOARD (Conductor Side) –
ICF-CD853V
12
12
A
A
B
B
D
D
F
F
E
E
C
C
I-V AMP
DETECTOR
12
11
17
18
26
SL+
SL–
F–
F–
F+
F+
T+
T+
T–
T–
SPINDLE
MOTOR DRIVE
M701
(SPINDLE)
S701
(LIMIT)
SLED
MOTOR DRIVE
27
M702
(SLED)
FOCUS
COIL DRIVE
TRACKING
COIL DRIVE
SP+
SP–
3
25
9
19
FIN
TIN
SLIN
SPIN
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC702
LD
LD
PD
PD
LASER DIODE
OPTICAL PICK-UP
(KSS-213R)
2-AXIS
DEVICE
(FOCUS)
(TRACKING)
2
1
1
M
M
7
MUTE
AUTOMATIC
POWER
CONTROL
Q701
8
FIN2
7
FIN1
+
MIX
4
RF
LPF
EQ
PH
BH
10
TIN2
9
TIN1
A/D
SW
LPF
TRACK
JUMP
TBAL
80
LDD
APC
AUDIO
ADJUST
SERVO
PROCESSOR
RUPTURE
DETECT
79
LDS
SW
AGC
D/A
13
FE
15
TE
20
TDO
21
FDO
23
SLDO
22
SPDO
S/H
3
EFM
IN
SLISE LEVEL
CONTROL
ERROR
CORRECTION
AUDIO CD
C1 – 2, C2 – 2
RAM
8FS
DIGITAL
FILTER
INTERPOLATION
MUTE
ATTENUATION
DEEMPHASIS
1 BIT
DAC
42
LCHO
45
RCHO
LPF
39
DOUT
AUDIO
OUT
FSEQ
PLL
VCEC
CLV, CAV
CONTROL
FRAME SYNC
DETECT,
PROTECT INSERT,
EFM DECODE
31
RAM
DRF
67
25
CONT4
72
CONT1
66
RES
61
CE
62
CL
63
DI
64
DO
65
WRQ
RF AMP, FOCUS/TRACKING SERVO,
DIGITAL SIGNAL PROCESSOR,
CLV SERVO, D/A CONVERTER
IC701
50 WRQ
56 DATA-IN CD
54 DATA CD/RADIO
55 CLK CD/RADIO
53 LAT CD/RADIO
58 XRST
57 DRF
41 FSEQ
CD-L
39
OPEN
S302
CD LID OPEN/CLOSE
DETECT
D306
D307
D308
(Page 13)
A
SYSTEM
CONTROLLER
IC401 (1/2)
R-CH
: CD PLAY
 R-ch is omitted due to same as L-ch.
 SIGNAL PATH
DI, CLK, CE
(Page 13)
B
GENERAL-PURPOSE
PORTS
COMMAND
INTERFACE
DRF
XOUT
XIN
49
48
X701
33.8688MHz
DI
CLK
CE
D52
D53
D54
SECTION  5
DIAGRAMS
5-1.
BLOCK  DIAGRAM  – CD Section –
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