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Conf
idential
SERVICE MANUAL
NOTEBOOK COMPUTER
9-874-465-06
Lineup : PCG-GR250
PCG-GR250K
PCG-GR250P
PCG-GR270
PCG-GR270K
PCG-GR270P
PCG-GR290
PCG-GR290K
PCG-GR290P
PCG-GR370
PCG-GR370K
PCG-GR370P
PCG-GR390
PCG-GR390K
PCG-GR390P
For American Area
US Model
Canadian Model
PCG-GR250/GR250K/GR250P/GR270/GR270K/GR270P/GR290/GR290K/
PCG-GR290P/GR370/GR370K/GR370P/GR390/GR390K/GR390P
Illust : PCG-GR250
S400
Ver 6-2002J
Revision History


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-- 2 --
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 trademark 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. Other 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.
Service and Inspection Precautions
1. Obey precautionary markings and instructions
Labels and stamps on the cabinet, chassis, and components identify 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 0 mark, which appears in circuit diagrams and
parts lists, denotes components 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 inclusion of
insulating materials (tubes and tape) and the mounting 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, therefore, be sure to duplicate the original layout.
4. Inspect after completing service
After servicing, inspect to make sure that all screws, components, 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.
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
manufacturer'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.
CAUTION: Changing the back up battery.
· Overcharging, short circuiting, reverse charging, multilation or
incineration of the cells must be avoided to prevent one or more of
the following occurrences; release of toxic materials, release of
hydrogen and/or oxygen gas, rise in surface temperature.
· If a cell has leaked or vented, it should be replaced immediately
while avoiding to touch it without any protection.
Confidential
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE 0 SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
PCG-GR250/GR250K/GR250P/GR270/GR270K/
PCG-GR270P/GR290/GR290K/GR290P/GR370/
PCG-GR370K/GR370P/GR390/GR390K/GR390P (AM)


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TABLE OF CONTENTS
CHAPTER 1. REMOVAL
1-1. Flowchart ......................................................................... 1-1
1-2. Main Electrical Parts Location Diagram ......................... 1-2
1-3. Removal ........................................................................... 1-3
1. HDD, Door Battery .......................................................... 1-3
2. COMBO Drive, CNX-143 Board .................................... 1-4
3. Assy Hood Key Board, Keyboard Unit ........................... 1-5
4. Fan DC, Nickel Hydrogen Battery .................................. 1-5
5. Cover Hinge ..................................................................... 1-6
6. Display Base .................................................................... 1-7
7. Escushion (Jog) ................................................................ 1-8
8. Assy Palmrest .................................................................. 1-8
9. Assy Latch Detector, LEX-31 Board, PWS-16 Board .... 1-9
10. Heat Sink (AL) , VIF-17 Board ....................................... 1-9
11. MBX-55 Assy ................................................................ 1-10
12. Connector PC Card, MBX-55 Board,
Assy Bracket IO ............................................................. 1-10
13. SWX-79 Board, Pad Touch ............................................ 1-11
14. Speaker, SWX-78 Board, IFX-159 Board ..................... 1-11
15. SO-DIMM ...................................................................... 1-12
16. Card Modem, CNX-140 Board ...................................... 1-12
17. LCD Section ­ Made by HI ­ ....................................... 1-13
1.Assy Bezel 14 ............................................................. 1-13
2.LCD Unit, Bracket LCD L (SA),
Bracket LCD R (SA) ................................................... 1-14
3.Inverter Unit, LCD Harness, Assy Display ................. 1-14
1-4. Replacing the CPU ........................................................ 1-15
1. Removing the CPU ........................................................ 1-15
2. Installing the CPU .......................................................... 1-15
1-5. DIP Switch Setting of the MBX-55 Board .................... 1-16
(to 1-16)
Section
Title
Page
Confidential
PCG-GR250/GR250K/GR250P/GR270/GR270K/
PCG-/GR270P/GR290/GR290K/GR290P/GR370/
PCG-GR370K/GR370P/GR390/GR390K/GR390P (AM)
CHAPTER 2. SELF DIAGNOSTICS .......................... 2-1
(to 2-1)
CHAPTER 3. BLOCK DIAGRAM ............................... 3-1
(to 3-2)
CHAPTER 4. FRAME HARNESS DIAGRAM ........ 4-1
(to 4-2)
CHAPTER 5. EXPLODED VIEWS AND
PARTS LIST ............................................ 5-1
5-1.
Main Section (GR250/GR250K/GR250P Model) ......... 5-2
5-1-1. Main Section (GR270/GR270K/GR270P/GR290/GR290K/
GR290P/GR370/GR370K/GR370P/GR390/GR390K/
GR390P Model) ....................................................... 5-4 (a)
5-2.
LCD Section (GR250/GR250K/GR250P Model)
­ Made by HI­ ................................................................ 5-5
5-2-1. LCD Section (GR270/GR270K/GR270P/GR290/GR290K/
GR290P/GR370/GR370K/GR370P/GR390/GR390K/
GR390P Model) ­ Made by LG, NE, SH­ ............... 5-6 (a)
5-3.
Connector Section (CH Type Only) ............................... 5-7
(to 5-8)
Section
Title
Page
History of the changes is shown as the
"Revision History" at the end of this data.


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1-1
Confidential
PCG-GR250/GR250K/GR250P/GR270/GR270K/
PCG-/GR270P/GR290/GR290K/GR290P/GR370/
PCG-GR370K/GR370P/GR390/GR390K/GR390P (AM)
CHAPTER 1.
REMOVAL
1-1. Flowchart
· P XX means pages that appears in this manual.
· Remember that hard disk drives are easily damaged by vibration. Always handle with care.
POWER
OFF
ASSY
HOOD
KEYBOARD
SO-DIMM
BATTERY
PACK
DOOR
BATTERY
CARD
MODEM
KEYBOARD
UNIT
ASSY
PALMREST
CONNECTOR
PC CARD
HDD
CNX-140
BOARD
CNX-143
BOARD
PWS-16
BOARD
VIF-17
BOARD
SPEAKER
SWX-78
BOARD
IFX-159
BOARD
FAN
DC
CPU
P 1-5
P 1-12
P 1-3
P 1-4
P 1-12
P 1-5
ESCUSHION
(JOG)
P 1-8
P 1-8
P 1-9
P 1-10
P 1-10
P 1-10
P 1-9
SWX-79
BOARD
P 1-11
P 1-5
P 1-15
P 1-5
P 1-6
P 1-13
P 1-14
P 1-14
P 1-14
P 1-14
P 1-14
P 1-11
P 1-11
P 1-11
P 1-3
P 1-4
P 1-12
ASSY
DISPLAY
COVER
HINGE
COMBO
DRIVE
LCD
UNIT
P 1-14
LCD
HARNESS
BRACKET
LCD R (SA)
BRACKET
LCD L (SA)
P 1-11
PAD
TOUCH
P 1-9
HEAT
SINK (AL)
LEX-31
BOARD
P 1-9
P 1-9
ASSY
LATCH
DETECTOR
ASSY
BRACKET
I/O
MBX-55
BOARD
NICKEL
HYDROGEN
BATTERY
P 1-7
DISPLAY
BASE
ASSY
BEZEL
14
INVERTER
UNIT


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1-2
Confidential
PCG-GR250/GR250K/GR250P/GR270/GR270K/
PCG-GR270P/GR290/GR290K/GR290P/GR370/
PCG-GR370K/GR370P/GR390/GR390K/GR390P (AM)
1-2. Main Electrical Parts Location Diagram
Inverter Unit
Modem Card
IFX-159 Board
CNX-140 Board
SWX-79 Board
SWX-78 Board
LEX-31 Board
PWS-16 Board
VIF-17 Board
MBX-55 Board
SO-DIMM
CPU
Speaker (2.8 cm)
Speaker
HDD
COMBO Drive
Fan DC, (With Heat Sink)
Heat Sink (AL)
PC Card Connector
LCD Unit