Sony ICF-CD853 / ICF-CD853L Service Manual ▷ View online
ICF-CD853/CD853L
11
11
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) –
ICF-CD853/CD853L
12
12
SECTION 5
DIAGRAMS
5-1.
BLOCK DIAGRAM – CD Section –
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
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
D306
D307
D308
(Page 14)
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
INTERFACE
DRF
XOUT
XIN
49
48
X701
33.8688MHz
DI
CLK
CE
D52
D53
D54
S301
CD LID OPEN/CLOSE
DETECT
ICF-CD853/CD853L
13
13
5-2.
BLOCK DIAGRAM – TUNER Section –
CF1
10.7MHz
FM/AM PLL
IC51
CT1, L1
FM TRACKING
CT2, L3
AM TRACKING
LOW-PASS
FILTER
LOW-PASS
FILTER
• SIGNAL PATH
: FM
: AM
X51
75kHz
L1
FM RF
XOUT
XIN
AM IN
A OUT
A IN
FM IN
20
19
11
12
18
BO2
6
CT1
D2
SWALLOW
COUNTER
UNIVERSAL
COUNTER
CCB
INTERFACE
REFERENCE
DIVIDER
UNLOCK
DETECT
12 BIT
PROGRAMMABLE
DIVIDER
PHASE
DETECTOR/
CHARGE PUMP
SHIFT REGISTER & LATCH
1/2
BO1
DI
CL
CE
PD
2
3
1
5
17
16
• R-ch is omitted due to same as L-ch.
DI
CLK
CE
R-CH
(Page 12)
B
TU-L
(Page 14)
C
L3
AM FERRITE-ROD
ANTENNA
(CD853L)
(CD853)
(CD853)
DI, CLK, CE
18
20
16
13
24
22
FM
FRONT-END
AM
FRONT-END
FM IF AMP/
DISCRI
DECODER
AMP
SWITCH
TUNING
INDICATOR
STEREO/MONO
SELECT
FM/AM
SELECT
REGULATOR
1/2
CONTER
VCO
AM IF AMP/
DET
PD2
PD1
14
FM
ANT
ANT
19
AM RF
IN
IN
FM/AM
FE OUT
CF3
10.7MHz
CF2
450kHz
FM RF
26
DISCRI
FM
IF IN
IF IN
4
ST IND
3
AM
IF IN
IF IN
PILOT DET
LPF
15
BAND SW
21
REG
29
PLL LPF
27
VCO
1
PLL LPF
2
PILOT DET
LPF
AM OSC
FM OSC
FM/AM FRONT-END,
FM/AM DET, MPX
IC1
T1
AM IF
LCH OUT
6
RCH OUT
5
T1
AM IFT
RV1
FM STEREO
ANT1
(FM)
BPF1
BPF
L.P.F.
CT4
LW VCO
VOLTAGE
CT3, L3-2
LW
TRACKING
CT2, L3-1
MW
TRACKING
L3
MW/LW
FERRITE-ROD
ANTENNA
CT2
Q2
CT3
L3-2
(LW)
L3-1
(MW)
Q2
MW/LW
SWITCH
D5
(1/3)
D5
(2/3)
CT2
D4
(1/2)
L4
AM(MW/LW) VCO
VOLTAGE
CT4
L4
AM
OSC
Q3
LW
SWITCH
D5
(3/3)
D4
(2/2)
ICF-CD853/CD853L
14
14
5-3.
BLOCK DIAGRAM – MAIN Section –
63
HP ON
60
POWER ON
52
BUZZER
61
A MUT
76
RESET
48
CD ON
RADIO ON 59
NAP LED
CD LED
RADIO LED
BUZZER LED
68
BACK LIGHT1
49
AC IN
62
HP SW
SYSTEM CONTROLLER
IC401 (2/2)
L OUT 5
R OUT
STANDBY
3
8
NF R
13
R IN
12
NF L
10
L IN
11
AMP
Q102
BUFFER
Q108
AMP
Q101
MUTING
Q106
MUTING
Q405
B+ SWITCH
Q1
RV301
3.3V
R-CH
R-CH
R-CH
D303
Q301
VOLUME
S301
ON OFF
MEGA BASS
BASS BOOST
SWITCH
Q103
STANDBY
SWITCH
Q302, 303
+3.3V
REGULATOR
Q951
LIQUID CRYSTAL DISPLAY
LCD401
+6V
REGULATOR
Q952
+3.9V
REGULATOR
Q953
+3.9V
REGULATOR
Q955
POWER AMP
IC302
51
BUZZERMUTE
Q304
Q107
Q207
HEADPHONE
SWITCH
Q107, 207
T901
POWER
TRANSFORMER
D401,
D601 – 603
LED 3.9V
D604 – 609
(LCD BACK LIGHT)
Q403,
Q404
Q404
SP101
(L-CH)
(L-CH)
SP201
(R-CH)
J301
(HEADPHONE)
i
(AC IN)
RECT
D901, 902
VT
3.3V
MOTOR 6V
TU 3.3V
CD 3.3V
RECT
D905, 906
RECT
D907 – 910
B+ SWITCH
Q305
67
BACK LIGHT0
XT2
XT1
X2
X1
3.9V
LED 3.9V
RESET SIGNAL
GENERATOR
IC402
D402
70
71
X401
32.768kHz
74
75
X402
4.19MHz
77 – 80
KEY0 – KEY3
43 – 46
COM0 – COM3
6 – 9
SEG0 – SEG27
10 – 37
Q401,
Q402
Q402
Q401 – 404
LED DRIVE
LED DRIVE
S601 – 621
: CD PLAY
: TUNER
• R-ch is omitted due to same as L-ch.
• SIGNAL PATH
C
(Page 13)
A
(Page 12)
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