Sony CDX-646 / CDX-646X Service Manual ▷ View online
SERVICE MANUAL
Ver 1.1 2001.07
CDX-646/646X
SUPPLEMENT-1
File this supplement with the service manual.
US Model
Canadian Model
AEP Model
UK Model
CDX-646
E Model
CDX-646/646X
Subject: Change of Mechanism Deck (MG-251B-137)
(ENG-01008)
The mechanism deck was changed from MG-251A-137 to MG-251B-137.
At the same time, MAIN, SWITCH and JACK boards were been changed.
This supplement contains only a new type mechanism deck and boards.
At the same time, MAIN, SWITCH and JACK boards were been changed.
This supplement contains only a new type mechanism deck and boards.
TABLE OF CONTENTS
1.
NEW/FORMER TYPE DISCRIMINATION
.....
2
2.
DIAGRAMS
2-1. Block Diagram – SERVO Section – ..............................
3
2-2. Block Diagram
– BUS CONTROL/POWER SUPPLY Section – ...........
4
2-3. Note for Printed Wiring Boards
and Schematic Diagrams ................................................
5
2-4. Printed Wiring Boards – RF/LSW Boards – .................
6
2-5. Schematic Diagram – RF/LSW Boards – ......................
7
2-6. Printed Wiring Boards
– MAIN Board (Component Side) – ..............................
8
2-7. Printed Wiring Boards
– MAIN (Conductor Side)/SWITCH Boards – ..............
9
2-8. Schematic Diagram – MAIN Board (1/2) – .................. 10
2-9. Schematic Diagram
2-9. Schematic Diagram
– MAIN (2/2)/SWITCH Boards – .................................. 11
2-10. Printed Wiring Boards – JACK Board – ........................ 12
2-11. Schematic Diagram – JACK Board – ............................ 12
2-12. IC Pin Function Description ........................................... 16
2-11. Schematic Diagram – JACK Board – ............................ 12
2-12. IC Pin Function Description ........................................... 16
3.
EXPLODED VIEWS
3-1. Case Section .................................................................... 19
3-2. Mechanism Deck Section-1 (MG-251B-137) ................ 20
3-3. Mechanism Deck Section-2 (MG-251B-137) ................ 21
3-4. Mechanism Deck Section-3 (MG-251B-137) ................ 22
3-5. Mechanism Deck Section-4 (MG-251B-137) ................ 23
3-2. Mechanism Deck Section-1 (MG-251B-137) ................ 20
3-3. Mechanism Deck Section-2 (MG-251B-137) ................ 21
3-4. Mechanism Deck Section-3 (MG-251B-137) ................ 22
3-5. Mechanism Deck Section-4 (MG-251B-137) ................ 23
4.
ELECTRICAL PARTS LIST
............................... 24
2
CDX-646/646X
1.
NEW/FORMER TYPE DISCRIMINATION
10626B10A
A: MG-251A-137 (Former type)
B: MG-251B-137 (New type)
B: MG-251B-137 (New type)
CDX-646/646X
3
3
2.
DIAGRAMS
2-1.
BLOCK DIAGRAM – SERVO Section –
M
M
6
7
VO4+
VO4–
VIN4+
VIN4–
10
11
VO2+
VO2–
MOTOR
DRIVE
MOTOR
DRIVE
COIL
DRIVE
12
13
VO1+
VO1–
VIN2+
VIN2–
32
33
FFDR
FRDR
28
29
32
31
22
21
5
4
VL0+
VL0–
FWD
REV
1
2
SFDR
SRDR
A
B
C
D
E
F
I-V AMP
PD
LD
DETECTOR
6
7
8
9
10
11
E
D
C
B
A
F
1
LD
FOCUS
ERROR
AMP
15
RFAC
16
FE
18
2
TE
TRACKING
ERROR
AMP
AUTOMATIC
POWER
CONTROL
Q101
PD
RFDC
FE
TE
43 39 41 40
RFDC
FE
TE
51
49
48
ASYMMENTRY
CORRECTOR
RFAC
ASYI
ASYO
ASYO
DIGITAL
PLL
53 56 55
54
FILO
CLTV
PCO
FILI
FILTER
INTERNAL BUS
16k RAM
ERROR
CORRECTOR
42 GFS
18
GFS
61 CDDAT
5
DATA
59 CDCLK
7
CLOK
60 CDLAT
56 SQSO
58 SQCK
52 SCOR
43 SCLK
41 FOK
XRST
6
XLAT
44 SENS
8
SENS
1
SQSO
2
SQCK
20
SCOR
9
SCLK
24
FOK
CPU
INTERFACE
SUBCODE
PROCESS
PROCESS
RFDC
FE
TE
SE
OP AMP
ANALOG SWITCH
A/D CONVERTER
MIRR
DFCT
FOK
DIGITAL SERVO
SIGNAL PROCESS
PWM GENERATOR
30
31
25
24
TFDR
TRDR
VIN1–B
18
8
9
VO3+
VO3–
VIN3+
VIN3–
DIGITAL
CLV
26
MDP
M
M103
(CHUCKING)
M102
(SPINDLE)
M101
(SLED)
TRACKING/FOCUS COIL DRIVE,
SLED/SPINDLE/CHUCKING
MOTOR DRIVE
IC201
MOTOR
DRIVE
COIL
DRIVE
SERVO AUTO
SEQUENCER
SERVO
INTERFACE
62
LOADF
5
LOADR
6
98
3
XRST
27
SSTP
LIM SW
SW3
(LIMIT)
97 LOAD SW
SW1
(CHUCKING END DETECT)
ON : When the optical pick-up
is inner position
is inner position
ON : When completion of the disc
chucking operation
chucking operation
96 SAVE SW
SW2
(SAVE END DETECT)
ON : When completion of the disc
save operation
save operation
DIGITAL FILTER,
NOISE SHAPER
70
77
71
76
AOUT1
AOUT2
BUFFER
AIN1
AIN2
72
75
LOUT1
LOUT2
MUTING
Q410, 420
67
XTAO
60
XTAI
X501
16.9344MHz
TIMING
LOGIC
CLOCK
GENERATOR
67
MUTE
SYSTEM CONTROLLER
IC201 (1/2)
DIGITAL SIGNAL PROCESSOR,
DIGITAL SERVO PROCESSOR,
DIGITAL FILTER, D/A CONVERTER
IC101
(TRACKING)
(FOCUS)
2-AXIS DEVICE
OPTICAL
PICK-UP BLOCK
(KSS-720A)
RF AMP,
FOCUS/TRACKING ERROR AMP
IC101
• SIGNAL PATH
: CD PLAY
LASER DIODE
PWM
&
INTEGRATOR
CN901 (1/2)
MUTING CONTROL
SWITCH
Q402
RFAC
SUMMING
AMP
4
AC
SUM
3
EQ
IN
IN
RFDC
SUMMING
AMP
RW/ROM
SW
12
APC AMP
RW/ROM
30
DC OFST
RFAC
VCA
RF EQ
AMP
28
RFDCO
RF AMP OFFSET
CONTROL SWITCH
Q102
99 RW SEL
CD-ROM/RW
SELECT SWITCH
Q202
D/A
INTERFACE
SERIAL
IN
INTERFACE
64
EMPH
66 EMPH
EFM
DE-
MODULATOR
GROUND-
ISOLATION
IC401
L
R
AUDIO
OUT
CDX-646/646X
4
4
RESET
SWITCH
7
DATA
CLK
BUSON
RST
5
4
6
2
B. UP
CONTROL
CN901 (2/2)
37
MCK
36
EHS
34
AVRH
ELVON
RV201
ELEVATOR HEIGHT
(ADDRESS)
RV202
ELEVATOR HEIGHT
SENSOR
24
+8V
REGULATOR
IC304
DRIVER +8V
BUCHK 46
BATTERY
CHECK
Q302
D306
D307
75
CDON 23
EJECT SW 50
B. UP +3.3V
BUS INTERFACE
(FOR SONY BUS)
IC302
+5V
REGULATOR
IC305
+3.3V
REGULATOR
Q303, 305
DAC/SERVO +5V
Z
SW801
51 MAGLK SW
4
ELVF
3
ELVR
SW201
MAGAZINE
DETECT
ON : When magazine
is set
is set
3
4
9
7
MOTOR
DRIVE
IN1
IN2
OUT1
OUT2
ELEVATOR
MOTOR DRIVE
IC301
M
M104
(ELEVATOR)
SYSTEM CONTROLLER
IC201 (2/2)
RESET
10
6
9
11
4
1
12
13
2
8
7
SO
SI
SCK
BUSON OUT
BUSON OUT
RESET
DATA
14
CLK
LOF
BUSON IN
RST
16
17
18
45
81
UNI SI
UNI SO
UNI CK
BUSON
VCC
RESET SIGNAL
GENERATOR
IC303
PS901
+3.3V
REGULATOR
IC306
SERVO +3.3V
X1
80
X0
X201
4MHz
2-2.
BLOCK DIAGRAM – BUS CONTROL/POWER SUPPLY Section –
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