Sony CDX-646 / CDX-646X Service Manual ▷ View online
18
18
CDX-646/646X
RESET
SWITCH
7
DATA
CLK
BUSON
RST
5
4
6
2
B. UP
CONTROL
CN901 (2/2)
60
MCK
59
EHS
51
VREF
ELVON
RV201
ELEVATOR HEIGHT
(ADDRESS)
RV202
ELEVATOR HEIGHT
SENSOR
REFERENCE VOLTAGE
SWITCH
Q201
B. UP +5V
9
+8V
REGULATOR
IC304
DRIVER +8V
BUCHK 75
BATTERY
CHECK
Q301, 302
D306
D307
38
CDON 8
EJECT 63
B. UP +5V
BUS INTERFACE
(FOR SONY BUS)
IC302
+5V
REGULATOR
IC305
+5V
REGULATOR
IC303
DAC/SERVO +5V
Z
SW801
76 MGLK
74 ELVF
73 ELVR
SW201
MAGAZINE
DETECT
ON : When magazine
is set
is set
3
4
40 XTAL
41 EXTAL
9
7
MOTOR
DRIVE
IN1
IN2
OUT1
OUT2
ELEVATOR
MOTOR DRIVE
IC301
M
M104
(ELEVATOR)
X201
12MHz
B. UP +5V
SYSTEM CONTROLLER
IC201 (2/2)
05
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
43
44
45
62
SI
SO
SCLK
BUSON
VCC
RESET SIGNAL
GENERATOR
IC303
PS901
6-2.
BLOCK DIAGRAM – BUS CONTROL/POWER SUPPLY Section –
19
19
• Circuit Boards Location
Note on Printed Wiring Boards:
•
•
X
: parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
f
: internal component.
•
b
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side:
Pattern face side:
Parts on the pattern face side seen from
(Conductor Side)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Component Side)
the parts face are indicated.
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
f
: internal component.
•
C
: panel designation.
•
U
: B+ Line.
•
H
: adjustment for repair.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from CD changer controller.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : CD PLAY
no mark : CD PLAY
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
• Signal path.
J
: CD PLAY
6-3.
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note:
The components identi-
fied by mark
The components identi-
fied by mark
0
or dotted
line with mark
0
are criti-
cal for safety.
Replace only with part
number specified.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque
Les composants identifiés par
une marque
0
sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce por tant le numéro
spécifié.
Ne les remplacer que par une
pièce por tant le numéro
spécifié.
SWITCH board
JACK board
LSW board
RF board
MAIN board
20
20
CDX-646/646X
6-4.
PRINTED WIRING BOARDS – LSW/RF Boards –
•
See page 19 for Circuit Boards Location.
• Semiconductor
Location
– RF Board–
(Component Side)
(Component Side)
Ref. No.
Location
IC101
H-4
IC201
I-3
Q101
F-4
(Page 22)
21
21
CDX-646/646X
6-5.
SCHEMATIC DIAGRAM – LSW/RF Boards –
•
See page 27 for for Waveforms.
•
See page 28 for IC Block Diagrams.
The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
Les composants identifiés par une marque
0
sont
critiques pour la sécurité.
Ne les remplacer que
par une pièce portant le numéro spécifié.
(Page 24)
Click on the first or last page to see other CDX-646 / CDX-646X service manuals if exist.