Sony CDX-444RF Service Manual page 49

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SERVICE MANUAL
Ver 1.1 2001.06
SUPPLEMENT-1
File this supplement with the service manual.
Subject: Change of MAIN/SW boards
In this set, MAIN and SW boards have been changed in the midway of
production.
Printed wiring boards and schematic diagrams of new type, and changed
parts list are described in this supplement-1.
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Refer to original service manual for other information.
• NEW/FORMER TYPE DISCRIMINATION
In this set with the following serial No. or later MAIN and SW boards
have been changed.
DESTINATION
US
Canadian
AEP and UK
E
w w w
.
http://www.xiaoyu163.com
CDX-444RF
US Model
Canadian Model
AEP Model
UK Model
(ECN-CSA03709)
SERIAL No.
1518236 or later
1521345 or later
1522500 or later
1521545 or later
x a o u 1 6 3
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http://www.xiaoyu163.com
8
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.
• : internal component.
f
• : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from
E Model
(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.
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Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and
specified.
• : internal component.
f
• 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
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
J : CD PLAY
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m
c o
CDX-444RF
2
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1 / W or less unless otherwise
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