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Toshiba A20-S259 Maintenance Manual - Page 458

Appendices, Board Layout, Table B-2, System board layout back, 8MHz clock for EC/KBC

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Appendices Mark (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) (S) (T) (U) (V) (W) (X) (Y) (Z) (AA) (AB) (AC) (AD) (AE) B-4 Appendix B Board Layout Table B-2 System board layout (back) Number IC1000 IS1050 IC1150 IC1200 IC1600 IC1671 IC1690 IC1810 IC2000 IC3200 IC4013 IC4600 IC4602 IC4603 PJ1800 PJ1820 PJ2110 PJ3510 PJ4100 PJ4600 PJ5620 PJ5655 PJ8810 PJ9900 F8810 X1000 X1260 X1670 X1810 X3200 X4000 Name Clock Generator ICS951104 CPU Socket Thermal Sensor ADM1032AR North Bridge M1672 South Bridge M1535+ RTC bq3285LDSS BIOS ROM MF400A CD Play Controller OZ168 YEBISU SS EC/KBC M306K9FCLRP LAN Controller RTL8139DL USB 2.0 controller µPD720101 USB Power Switch MAX1922ESA USB Power Switch MAX1922ESA HDD I/F connector ODD I/F connector PC Card Slot Parallel Port RJ-45 LAN Jack USB connector CRT I/F connector TV connector Battery I/F connector FAN connector 15A fuse (for battery) 14.31818MHz clock (for clock generator) 14.31818MHz clock (for north bridge) 32.768KHz clock (for RTC) 8MHz clock (for OZ168) 8MHz clock (for EC/KBC) 25MHz clock (for LAN controller) Satellite A20 Maintenance Manual (960-444)

Section	Page
Table of Contents	7
Chapter 1 Hardware Overview	11
1.1 Features	15
1.2 System Unit Block Diagram	21
1.3 2.5-inch Hard Disk Drive	28
1.4 CD-RW/DVD Drive	30
1.5 DVD-R/-RW Drive	33
1.6 DVD Multi Drive	34
1.7 Keyboard	37
1.8 TFT Color Display	38
1.9 Power Supply	40
1.10 Batteries	42
Chapter 2 Troubleshooting Procedures	45
2.1 Troubleshooting	51
2.2 Troubleshooting Flowchart	53
2.3 Power Supply Troubleshooting	57
2.4 System Board Troubleshooting	69
2.5 FDD Troubleshooting	83
2.6 HDD Troubleshooting	86
2.7 Keyboard Troubleshooting	91
2.8 Display Troubleshooting	93
2.9 CD-RW/DVD, DVD-ROM, DVD-R/-RW, and DVD Multi Drive Troubleshooting	95
2.10 Modem Troubleshooting	97
2.11 LAN Troubleshooting	99
2.12 Wireless LAN Troubleshooting	101
2.13 Sound Troubleshooting	105
2.14 SD Card Slot Troubleshooting	108
Chapter 3 Tests and Diagnostics	109
3.1 The Diagnostic Test	113
3.2 Executing the Diagnostic Test	116
3.3 Subtest Names	120
3.4 System Test	122
3.5 Memory Test	125
3.6 Keyboard Test	127
3.7 Display Test	131
3.8 Floppy Disk Test	135
3.9 Printer Test	137
3.10 Async Test	139
3.11 Hard Disk Test	140
3.12 Real Timer Test	143
3.13 NDP Test	145
3.14 Expansion Test	146
3.15 CD-ROM/DVD-ROM Test	148
3.16 Wireless LAN Test (Agere)	149
3.17 Wireless LAN Test (Atheros)	154
3.18 Sound/LAN/Modem Test	157
3.19 Error Code and Error Status Names	164
3.20 Hard Disk Test Detail Status	168
3.21 Head Cleaning	170
3.22 Log Utilities	171
3.23 Running Test	173
3.24 Floppy Disk Drive Utilities	175
3.25 System Configuration	181
3.26 SETUP	183
Chapter 4 Replacement Procedures	201
4.1 General	211
4.2 Battery Pack	219
4.3 Optional PC Card	222
4.4 Optional SD Card	224
4.5 HDD	226
4.6 Modem Daughter Card	230
4.7 ODD	232
4.8 Cooling Fan	236
4.9 CPU	239
4.10 Keyboard	244
4.11 Memory Module	248
4.12 Wireless LAN Card	251
4.13 Bluetooth	255
4.14 Top Cover with Display Assembly	257
4.15 Touch Pad	261
4.16 Front Membrane ASSY	263
4.17 FIR Board	265
4.18 Sound Board	267
4.19 RTC Battery	269
4.20 DC-IN Jack	271
4.21 System Board	273
4.22 Sub Fan	275
4.23 PC Card Slot	277
4.24 Speakers	279
4.25 Touch Pad Switch	281
4.26 Display Mask	283
4.27 FL Inverter	285
4.28 LCD Module	287
4.29 Wireless LAN Antenna/Bluetooth Antenna/Display Cover	291
4.30 Fluorescent Lamp	300
4.30.1 Replacing the 15.0-inch XGA LG.Philips Fluorescent Lamp	301
4.30.2 Replacing the 15.0-inch XGA Samsung Fluorescent Lamp	312
4.30.3 Replacing the 15.0-inch XGA Sharp Fluorescent Lamp	322
4.30.4 Replacing the 15.0-inch XGA CHIMEI Fluorescent Lamp	345
4.30.5 Replacing the 15.0-inch SXGA+ LG.Philips Fluorescent Lamp	352
4.30.6 Replacing the 15.0-inch SXGA+ Samsung Fluorescent Lamp	363
4.30.7 Replacing the 15.0-inch SXGA+ Sharp Fluorescent Lamp	373
4.30.8 Replacing the 14.1-inch XGA TOSHIBA Fluorescent Lamp	399
4.30.9 Replacing the 14.1-inch XGA Sharp Fluorescent Lamp	411
4.30.10 Replacing the 14.1-inch XGA Samsung Fluorescent Lamp	418
4.30.11 Replacing the 14.1-inch XGA L.G. Philips Fluorescent Lamp	427
Appendices	440
Appendix A Handling the LCD Module	449
Appendix B Board Layout	455
Appendix C Pin Assignments	464
Appendix D Keyboard Scan/Character Codes	492
Appendix E Key Layout	500
Appendix F Wiring Diagrams	506
Appendix G BIOS Rewrite Procedures	508
Appendix H EC/KBC Rewrite Procedures	510

Match case Limit results 1 per page

Appendices

Appendix B

Board Layout

B-4

Satellite A20 Maintenance Manual (960-444)

Table B-2

System board layout (back)

Mark

Number

Name

(A)

IC1000

Clock Generator

ICS951104

(B)

IS1050

CPU Socket

(C)

IC1150

Thermal Sensor

ADM1032AR

(D)

IC1200

North Bridge

M1672

(E)

IC1600

South Bridge

M1535+

(F)

IC1671

RTC

bq3285LDSS

(G)

IC1690

BIOS ROM

MF400A

(H)

IC1810

CD Play Controller

OZ168

(I)

IC2000

YEBISU SS

(J)

IC3200

EC/KBC

M306K9FCLRP

(K)

IC4013

LAN Controller

RTL8139DL

(L)

IC4600

USB 2.0 controller

PD720101

(M)

IC4602

USB Power Switch

MAX1922ESA

(N)

IC4603

USB Power Switch

MAX1922ESA

(O)

PJ1800

HDD I/F connector

(P)

PJ1820

ODD I/F connector

(Q)

PJ2110

PC Card Slot

(R)

PJ3510

Parallel Port

(S)

PJ4100

RJ-45 LAN Jack

(T)

PJ4600

USB connector

(U)

PJ5620

CRT I/F connector

(V)

PJ5655

TV connector

(W)

PJ8810

Battery I/F connector

(X)

PJ9900

FAN connector

(Y)

F8810

15A fuse (for battery)

(Z)

X1000

14.31818MHz clock (for clock generator)

(AA)

X1260

14.31818MHz clock (for north bridge)

(AB)

X1670

32.768KHz clock (for RTC)

(AC)

X1810

8MHz clock (for OZ168)

(AD)

X3200

8MHz clock (for EC/KBC)

(AE)

X4000

25MHz clock (for LAN controller)