Sony CDX-444RF Service Manual ▷ View online
CDX-444RF
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Printed Wiring Board:
•
•
X
: parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
f
: internal component.
•
: 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
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
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.
•
A
: 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
• 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.
J
: CD PLAY
2
2
CDX-444RF
13
(13)
80
81
100
51
1
100
76
26
50
51
75
C255
1
25
30
31
50
IC101
IC201
IC303
IC301
IC401
R303
C308
C251
C317
C252
R319
R305
C253
C254
C307
C320
R302
R320
PRINTED WIRING BOARDS – MAIN Board (Component Side) –
• Semiconductor
Location
Ref. No.
Location
D201
B-6
D202
B-6
D231
F-8
D306
F-5
D307
F-5
D309
F-4
D310
G-4
D311
F-3
D312
F-6
D313
F-3
IC101
C-8
IC201
F-8
IC301
G-3
IC303
F-3
IC401
C-6
Q201
E-10
Q231
F-7
Q232
F-8
Q301
F-5
Q302
F-5
Q303
F-4
Q401
D-8
Q402
D-8
Q410
C-6
Q420
B-6
3
3
CDX-444RF
13
(13)
13
(13)
IC305
IC304
• Semiconductor
Location
Ref. No.
Location
PRINTED WIRING BOARDS – MAIN (Conductor Side)/SW Boards –
IC304
G-1
IC305
E-1
4
4
CDX-444RF
SCHEMATIC DIAGRAM – MAIN Board (1/2) –
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