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2 Troubleshooting Procedures 2.3 Power Supply Troubleshooting
2-14 [CONFIDENTIAL] Satellite A50S/TECRA A3X Maintenance Manual (960-534)
Procedure 5 Replacement Check
The power is supplied to the system board by the AC adapter. If either the AC adapter or
the system board was damaged, perform the following Checks.
To disassemble the computer, follow the steps described in Chapter 4, Replacement
Procedures.
Check 1 Replace the AC adapter with a new one. If the AC adapter is still not
functioning properly, perform Check 2.
Check 2 Replace the DC-IN harness with a new one. If the AC adapter is still not
functioning properly, perform Check 2.
Check 3 Replace the system board with a new one.
- Toshiba Personal Computer 1
- Maintenance Manual 1
- Preface 3
- Format complete 5
- System transferred 5
- Table of Contents 6
- Hardware Overview 11
- Chapter 1 11
- 1 Hardware Overview 12
- Chapter 1 Contents 13
- 1 Hardware Overview 15
- 1.1 Features 17
- 1.2 System Block Diagram 22
- Item Specifications 26
- HDD2191VZK01 27
- 1.5 CD-ROM Drive 29
- 1.6 DVD-ROM Drive 31
- 1.8 DVD Super Multi drive 37
- 1.9 Keyboard 40
- 1.10 TFT Color Display 41
- 1.11 Power Supply 44
- 1.12 Batteries 46
- Condition Time 48
- 1.13 AC Adapter 49
- Chapter 2 51
- Troubleshooting Procedures 51
- 2 Troubleshooting Procedures 52
- Chapter 2 Contents 53
- 2.1 Troubleshooting 56
- ? Main Battery 64
- ? Second Battery 64
- ? S3V output (P60) 64
- ? E5V output (P61) 65
- ? E3V output (P62) 65
- ? 1R8-B1V output (P64) 65
- ? PPV output (P65) 66
- ? PTV output (P66) 66
- ? PTV output (P73) 66
- <System board> 91
- Keyboard 92
- 2.8 Display Troubleshooting 93
- <FL inverter> 94
- <LCD module> 94
- Touch pad 96
- 2.11 Modem Troubleshooting 98
- 2.12 LAN Troubleshooting 99
- 2.13 Sound Troubleshooting 100
- Chapter 3 104
- Tests and Diagnostics 104
- 3 Tests and Diagnostics 105
- Chapter 3 Contents 106
- 3.1 The Diagnostic Test 109
- 3.2.3 Heatrun test program 117
- 3.4 Heatrun Test 121
- 3.5 Subtest Names 122
- 3.6 System Test 124
- 3.7 Memory Test 126
- 3.8 Keyboard Test 127
- 3.9 Display Test 128
- 3.10 Floppy Disk Test 131
- 3.11 Printer Test 133
- 3.12 Async Test 135
- 3.13 Hard Disk Test 136
- HARD DISK TEST XXXXXXX 137
- 3.14 Real Timer Test 139
- Current date : 12-31-1999 141
- Current time : 23:59:58 141
- Current date : 01-01-2000 141
- Current time : 00:00:00 141
- 3.15 NDP Test 142
- 3.16 Expansion Test 143
- 3.17 CD-ROM/DVD-ROM Test 145
- 3.20 ONLY ONE TEST 151
- 3.21 Head Cleaning 157
- 3.22 Log Utilities 158
- 3.23 Running Test 160
- 1:FDD is 164
- Another dump (1:Yes,2:No) ? 165
- 3.25 System Configuration 166
- 3.25.2 Operations 167
- Error count = 00000 184
- [Modem loopback test !] 186
- Table 3-5 Error message 189
- Error code 190
- Error code 194
- 3.30 Sound Test program 197
- Press any key to continue… 198
- Manual (960-534) 199
- [Ctrl]+[Break] ; test end 200
- [Ctrl]+[C] ; key stop 200
- 3.31 SETUP 203
- 10. I/O Ports 204
- (a) Serial 204
- (b) Parallel 204
- Are you sure? (Y/N) 208
- Master+User is set in the 211
- Alarm Time = 00:00:00 215
- This cannot be changed 218
- PCI BUS = IRQ10, IRQ11 218
- = Left Ctrl + Left Alt 219
- KEYBOARD 219
- Chapter 4 221
- Replacement Procedures 221
- 4 Replacement Procedures 222
- Chapter 4 Contents 223
- 4.1 Overview 227
- 4.2 Battery Pack/PC Card 234
- Eject Button 236
- 4.3 Memory Module 237
- 4.4 MDC 240
- 4.5 HDD 242
- 4.6 Wireless LAN card 245
- 4.7 Cooling Fin/CPU 247
- M2x4B BIND 248
- CPU Holder 248
- Cooling Fin 249
- ( Opened) 249
- ( Closed) 249
- Triangle mark 250
- CPU Chip 251
- 4.8 Keyboard 252
- Keyboard Hold Plate 253
- M2.5x2.8B THIN BIND 253
- 4.9 Switch membrane board 256
- 4.10 Optical Drive 258
- 4.11 Display Assembly 260
- Display Assembly 262
- Base Assembly 262
- 4.12 Sound Board 264
- 4.14 Fan 272
- 4.16 PC card cover 276
- 4.17 Battery Latch 277
- 4.18 Battery Lock 279
- 4.19 Touch Pad 281
- 4.20 LCD Unit/FL Inverter 283
- 4.21 Latch Assembly 287
- [Samsung 288
- 4.23 Fluorescent Lamp 297
- PCB cover 298
- Panel assembly 301
- Mold frame 301
- Lamp wire 304
- Lamp assembly 305
- (H) Backlight unit 310
- (I) LCD panel 310
- Do not make any sheet over 318
- Top case 325
- Cover assembly bottom 328
- Source PCB 334
- Gate PCB 334
- Appendices 342
- Appendix Contents 344
- Appendix. A 350
- Appendix B Board Layout 356
- B.2 System Board Back View 358
- B.3 Sound Board (FLGSN*) 360
- B.6 S-Video Board (FLKCS*) 363
- Appendix C Pin Assignment 364
- SPOUT (L-) 386
- SPOUT (L+) 386
- SPOUT(R+) 387
- SPOUT (R-) 387
- Sound Board (FLGSN*) 389
- Switch Board (FLKSW*) 390
- Parallel Board (FLGCP*) 391
- S-Video Board (FLGCS*) 393
- 1 GND - 2 GND 394
- Serial Board (FLGSR*) 395
- Appendix. D 398
- Appendix E Key Layout 406
- Appendix F Wiring Diagrams 408
- Appendix H Reliability 412
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