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Sony Corporation
XXXXXXX
--34 --
English
99XXXXX-1
Printed in XXXXX
© 1999. X
9-928-301-11
XXXXXXXX
PCG-505TX/TS
9-928-301-11
Notebook Computer
SERVICE MANUAL
PCG-505TX/TS (U/C)
US Model
Canadian Model
PCG-505TX/TS
(U/C
)
99XXXXX-1
9-928-301-1
1


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-- 2 --
PCG-505TX/TS (U/C)
Information in this document is subject to change without
notice.
Sony and VAIO are trademarks of Sony. Intel logo and Intel
Inside logo are registered trademarks of Intel Corporation.
Pentium MMX is a trademarks of Intel Corporation. Microsoft,
MS-DOS, Windows, the Windows 95 and Windows 98 logo are
trademarks of Microsoft Corporation.
All other trademarks are trademarks or registered trademarks of
their respective owners. Oter trademarks and trade names may
be used in this document to refer to the entitles claiming the
marks and names or their produces. Sony Corporation disclaims
any proprietary interest in trademarks and trade names other than
its own.
1. Obey precautionary markings and
instructions
Labels and stamps on the cabinet, chassis, and components iden-
tify areas requiring special precautions. Be sure to observe these
precautions, as well as all precautions listed in the operating
manual and other associated documents.
2. Use designated parts only
The set's components possess important safety characteristics,
such as noncombustibility and the ability to tolerate large
voltages. Be sure that replacement parts possess the same safety
characteristics as the originals. Also remember that the (
mark,
which appears in circuit diagrams and parts lists, denotes com-
ponents that have particularly important safety functions; be extra
sure to use only the designated components.
3. Always follow the original design
when mounting parts and routing wires
The original layout includes various safety features, such as in-
clusion of insulating materials (tubes and tape) and the mount-
ing of parts above the printer board. In addition, internal wiring
has been routed and clamped so as to keep it away from hot or
high-voltage parts. When mounting parts or routing wires. there-
fore, be sure to duplicate the original layout.
Caution Markings for Lithium/Ion Battery - The following or
similar texts shall be provided on battery pack of equipment or
in both the operating and the service instructions.
CAUTION: Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by
the manufacturer. Discard used batteries according to the manu-
facturer's instructions.
CAUTION: The battery pack used in this device may present a
fire or chemical burn hazard if mistreated. Do not disassemble,
heat above 100°C (212°F) or incinerate.
Dispose of used battery promptly.
Keep away from children.
4. Inspect after completing service
After servicing, inspect to make sure that all screws, compo-
nents, and wiring have been returned to their original condition.
Also check the area around the repair location to ensure that
repair work has caused no damage, and confirm safety.
5. When replacing chip components...
Never reuse components. Also remember that the negative side
of tantalum capacitors is easily damaged by heat.
6. When handling flexible print boards...
· The temperature of the soldering-iron tip should be about 270C.
· Do not apply the tip more than three times to the same pattern.
· Handle patterns with care; never apply force.
Caution: Remember that hard disk drives are easily damaged
by vibration. Always handle with care.
Service and Inspection Precautions


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PCG-505TX/TS (U/C)
TABLE OF CONTENTS
CHAPTER 1.
REMOVAL
1-1.
Flowchart ................................................................................................... 1-1
1-2.
Electric Parts Arrangement Diagram ......................................................... 1-1
1-3.
Removal ..................................................................................................... 1-2
1.
Palm rest housing assembly ....................................................................... 1-2
2.
Keyboard unit, touch pad, SWX-19 board ................................................. 1-2
3.
HDD ........................................................................................................... 1-3
4.
SWX-24 board, IRC-4 board, CNX-52 board, CNX-53 board and
CNX-25 board ............................................................................................ 1-3
5.
MBX-16 board, speaker unit, and nickel-hydrogen battery ...................... 1-4
6.
PC card connector, heat pipe, and heat sink .............................................. 1-4
7.
Display assembly ....................................................................................... 1-5
8.
Housing bezel assembly, LCD unit, and inverter ...................................... 1-5
(to 1-6)
CHAPTER 2.
SELF-DIAGNOSTICS
2-1.
Note ............................................................................................................ 2-1
2-2.
Necessary Tools ......................................................................................... 2-1
2-3.
Start-up of the Self-Diagnostics Program .................................................. 2-1
2-4.
Diagnostics on the Setup Screen ................................................................ 2-1
2-5.
Diagnostics Using the Self-Diagnostics Program ...................................... 2-2
2-6.
Test Items ................................................................................................... 2-3
2-7.
Tests that are not Supported ....................................................................... 2-5
(to 2-5)
CHAPTER 3.
BLOCK DIAGRAM ............................................................ 3-1
(to 3-2)
CHAPTER 4.
FRAME HARNESS DIAGRAM ......................................... 4-1
(to 4-2)
CHAPTER 5.
EXPLODED VIEW AND PARTS LIST
5-1.
Main Unit ................................................................................................... 5-1
5-2.
Display Unit ............................................................................................... 5-3
5-3.
FDD Assembly ........................................................................................... 5-5
(to 5-6)


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1-1
PCG-505TX/TS (U/C)
CHAPTER 1.
REMOVAL
1-1. Flowchart
· Page x-x indicates the page for the topic.
· Note that HDDs (Hard Disc Drives) are easily damaged by shock of impact.
1-2. Electric Parts Arrangement Diagram
· Note that HDDs (Hard Disc Drives) are easily damaged by shock of impact.
POWER
OFF
PALM REST
HOUSING
SWX-24
BOARD
IRC-4
BOARD
CNX-52
BOARD
CNX-53
BOARD
CNX-25
BOARD
MBX-16
BOARD
PC CARD
CONNECTOR
P2-2
P2-3
P2-3
P2-3
P2-3
P2-3
P2-4
P2-4
KEYBOARD
UNIT
TOUCH
PAD
SWX-19
BOARD
SPEAKER
UNIT
HEAT
SINK
P2-2
P2-2
P2-2
P2-4
P2-4
HDD
NICKEL-
HYDROGEN
BATTERY
HEAT
PIPE
P2-3
P2-4
P2-4
DISPLAY
ASSY
HOUSING
BEZEL
ASSY
P2-5
P2-5
LCD
UNIT
P2-5
INVERTER
P2-5
Microphone Unit
CNX-25 Board
Keyboard Unit
CNX-52 Board
CNX-53 Board
SWX-19 Board
HDD
Touch Pad
Speaker Unit
PC Card Connector
SWX-24 Board
Nickel-hydrogen Battery
IRC-4 Board
MBX-16 Board
Inverter
LCD Unit