
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type
recommended by the manufacturer.
Dispose of used batteries according
to the manufacturer’s instructions.
Confidential
PCV-R556DS/R558DS (UC)
– 2 –

TABLE OF CONTENTS
1. OPERATION
........................................................... 1-1
2. DISASSEMBLY
2-1. Flow Chart................................................................ 2-1
2-2. Rear Panel ................................................................ 2-2
2-3. Top Cover, Left Cover, Right Cover
and Top Cover Chassis ............................................ 2-2
2-4. Panel Ass’y (G) ........................................................ 2-3
2-5. HDD ......................................................................... 2-4
2-6. VGA Card ................................................................ 2-4
2-7. Modem Card ............................................................ 2-5
2-8. Slot Cover ................................................................ 2-5
2-9. Power Supply ........................................................... 2-6
2-10. Precaution on Mounting the Switching
Power Supply ........................................................... 2-6
2-11. Drive Cover Ass’y (DVD) ....................................... 2-7
2-12. DVD-ROM............................................................... 2-8
2-13. FDD .......................................................................... 2-8
2-14. CD-RW..................................................................... 2-9
2-15. CNX-94 Mount ........................................................ 2-9
2-16. Mother Board ........................................................... 2-10
2-17. CPU .......................................................................... 2-11
2-18. Memory (DIMM)..................................................... 2-11
2-19. Main Electric Parts Arrangement ............................ 2-12
3. MOTHERBOARD DESCRIPTION
3-1. CUSL-LE MOTHER BOARD ................................ 3-1
3-1-1. Overview .................................................................. 3-1
3-1-2. Connectors and Headers .......................................... 3-1
3-1-3. Audio........................................................................ 3-1
3-1-4. AGP Graphics .......................................................... 3-1
3-1-5. Other Key Components ........................................... 3-2
3-1-6. BIOS......................................................................... 3-2
3-1-7. Power Management ................................................. 3-2
3-1-8. PS2 Keyboard/Mouse .............................................. 3-2
3-1-9. Floppy Drive Support .............................................. 3-2
3-1-10. CD-ROM/DVD-ROM Drive Support...................... 3-2
3-1-11. IDE Drive Support ................................................... 3-2
3-1-12. Main Memory .......................................................... 3-2
3-1-13. Battery Requirements .............................................. 3-2
3-1-14. Motherboard Environment Specification ................ 3-2
3-1-15. Power Supply/Consumption .................................... 3-2
3-1-16. Regulatory Compliance ........................................... 3-2
4. PROGRAMS FOR SERVICE
4-1. General Description ................................................. 4-1
4-2. Diag Starting Method .............................................. 4-1
4-2-1. PC-Doctor Starting Method..................................... 4-1
4-2-2. Intel 810 Video Diag Starting Method .................... 4-2
4-2-3. nVIDIA Riva TNT2 Pro Video
Diag Starting Method .............................................. 4-2
5. SERVICE INFORMATION
5-1. Jumper Setting on Hard Disk Drive ........................ 5-1
5-2. Jumper Setting of Motherboard............................... 5-2
6. FRAME HARNESS
6-1. Connector List.......................................................... 6-1
6-2. Frame Harness Diagram .......................................... 6-5
7. REPAIR PARTS LIST
7-1. Exploded Views and Parts List (PCV-R556DS) ..... 7-1
7-2. Exploded Views and Parts List (PCV-R558DS) ..... 7-3
7-3. Accessories and Parts List ....................................... 7-5
– 3 –
Confidential
PCV-R556DS/R558DS (UC)

2-1. FLOW CHART
SECTION 2
DISASSEMBLY
REAR PANEL
P2-2
TOP COVER,
LEFT COVER,
RIGHT COVER,
TOP COVER
CHASSIS
P2-2
PANEL ASS’Y
(G)
P2-3
HDD
P2-4
VGA
CARD
P2-4
DRIVE COVER
ASS’Y (DVD)
P2-7 P2-8
FDD
P2-8
CD-RW
P2-9
CNX-94
MOUNT
P2-9
DVD-ROM
MODEM
CARD
P2-5
SLOT
COVER
P2-5
POWER
SUPPLY
P2-6
MOTHER
BOARD
P2-10
CPU
P2-11
MEMORY
(DIMM)
P2-11
• Ps-s denotes the page concerned.
• HDD has a low resistance to vibration, requiring careful handling.
2-1
Confidential
PCV-R556DS/R558DS (UC)

2-2. REAR PANEL
Note on mounting rear panel:
When installation rear panel,
refer to figure.
GOOD
4 rear panel
1 two claws
3 claw
2 two claws
2-3. TOP COVER, LEFT COVER, RIGHT COVER AND TOP COVER CHASSIS
A
claw
rear panel
NG
claw
rear panel
1 three screws
(unified 4.5)
2 four claws
3 Remove top cover, left cover,
right cover and top cover
chassis in the direction of arrow A.
2 five claws
2 five claws
2 four
claws
Confidential
2-2PCV-R556DS/R558DS (UC)

2-9. POWER SUPPLY
3
Remove power supply,
PS bracket ass’y
and PS fan duct
in the direction of arrow
4
three screws
(unified 4.5)
A
2
three screws
(PS No.6-32UNC)
6
boss
.
A
7
PS fan duct
5
power supply
2
screw
(unified 4.5)
2-10. PRECAUTION ON MOUNTING THE SWITCHING POWER SUPPLY
3
Mount the Switching power supply
with its front side floating up a little.
1
Disconnect respective
power connectors
on the mother board,
DVD-ROM,
CD-RW ,
FDD and HDD.
2
Align the PS fan duct with
the corner of heat sink.
Confidential
1
Shift the cable toward the
front side of main unit.
2-6PCV-R556DS/R558DS (UC)