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IBM R50 Series, R50p Series, R51 Series Red (+) Black (-)

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4. Remove the backup battery (see “Checking the battery

pack” on page 38).

5. Measure the voltage of the backup battery. See the

following figure.

Red (+)Black (-)

Wire Voltage (V dc)

Red +2.5 to +3.2

Black Ground

v If the voltage is correct, replace the system board.

v If the voltage is not correct, replace the backup battery.

v If the backup battery discharges quickly after

replacement, replace the system board.

Checkout guide

40 R50/R50p, R51 Series

Contents

Main IBM Mobile Systems ThinkPad Computer Hardware Maintenance Manual 1836, 1840, 1841, 2883, 2887, 2888, 2889, 2894, 2895) Page Contents Copyright IBM Corp. 2004 iii iv About this manual Copyright IBM Corp. 2004 1 Page Introduction Important service information Copyright IBM Corp. 2004 3 Strategy for replacing FRUs Strategy for replacing a hard disk drive How to use error messages Diskette compatibility matrix Diskette capacity Safety notices: multilingual translations Important service information Safety notice 1 Introduction 5 Safety notice 2 6 (continuation of safety notice 2) Introduction 7 Safety notice 3 8 (continued) Introduction 9 Safety notice 4 10 (continuation of safety notice 4) Introduction Safety notice 5 12 Safety notice 6 Introduction 13 Safety notice 7 14 Safety notice 8 Introduction 15 Safety information 16 General safety Introduction 17 Electrical safety Observe the following rules when working on electrical equipment. 18 Safety inspection guide Introduction 19 Handling devices that are sensitive to electrostatic discharge 20 Use the round ground prong of the ac plug on ac-operated computers. Grounding requirements Introduction 21 Laser compliance statement 22 CAUTION: Introduction 23 24 General descriptions The desciptions in this chapter apply to any ThinkPad model that has the PC-Doctor Copyright IBM Corp. 2004 25 Some descriptions might not apply to your particular computer. Read this first 26 Read this first Related service information This section provides information about the following: v v v v General descriptions 27 Service web site Restoring the pre-installed system Passwords 28 General descriptions 29 How to remove the power-on password How to remove the hard-disk password 30 Page Power management 32 Screen blank mode Standby mode Hibernation mode General descriptions 33 Checkout guide 34 Testing the computer The ThinkPad computer has a test program called PC-Doctor Creating the PC-Doctor diagnostics diskette General descriptions 35 The options on the test menu are as follows: 36 v v v v v v v v v v v v v v v v v v v v v v WirelessLAN Usethecursor keys and ESC to move in menus. PressENTERtoselect. Detecting system information with PC-Doctor Hardware Info Utility Power system checkout Checking the ac adapter 38 (16-10V) Pin Voltage (V dc) 1 +15.5 to +17.0 2 Ground Checking operational charging Checking the backup battery Checkout guide Red (+) Black (-) Wire Voltage (V dc) Red +2.5 to +3.2 Black Ground 40 v v v replacement, replace the system board. Checkout guide ThinkPad R50/R50p and R51 Series Copyright IBM Corp. 2004 41 42 Product overview This section presents the following product-unique information: v v v v ThinkPad R50/R50p and R51 Series 43 (continued) Specifications 44 (continued) ThinkPad R50/R50p and R51 Series 45 (continued) 46 ThinkPad R50/R50p and R51 Series 47 Status indicators The system status indicators show the status of the computer, as follows: 48 2 7 8 9 (continued) ThinkPad R50/R50p and R51 Series 49 R Product overview Indicator Meaning 8 Standby FRU tests The following table shows the test for each FRU. 50 (continued) Product overview ThinkPad R50/R50p and R51 Series 51 Product overview Fn key combinations 52 (continued) combination Product overview ThinkPad R50/R50p and R51 Series 53 Product overview Symptom-to-FRU index 54 System board Numeric error codes 0175 Bad CRC1, stop POST taskThe EEPROM checksum is not correct. ThinkPad R50/R50p and R51 Series 55 56 ThinkPad R50/R50p and R51 Series 57 58 Error messages ThinkPad R50/R50p and R51 Series 59 Beep symptoms No-beep symptoms 60 LCD-related symptoms ThinkPad R50/R50p and R51 Series 61 Note: (white or color.) A dark dot means a pixel is always off (black color.) No beep, power-on indicator on, and a blank LCD during POST. System board. v v v adjusted. v adjusted. Intermittent problems 62 Undetermined problems FRU replacement notices ThinkPad R50/R50p and R51 Series 63 (Cross-section) Screw notices 90degrees more Retaining serial numbers This section includes the following descriptions: v v v 64 Restoring the serial number of the system unit Retaining the UUID ThinkPad R50/R50p and R51 Series 65 Reading or writing the ECA information 66 Removing and replacing a FRU ThinkPad R50/R50p and R51 Series 67 1010 Battery pack 68 1020 Ultrabay Enhanced device 1030 Hard disk drive 70 (continued) Note: Removing and replacing a FRU When installing: is attached firmly. ThinkPad R50/R50p and R51 Series 71 1040 DIMM (optional) For access, remove this FRU: 72 Note: 1050 Keyboard For access, remove this FRU: ThinkPad R50/R50p and R51 Series 73 (continued) 1 1a 74 When installing: Make sure that the connector 4 is When installing: 1. Attach the connector 1. 2. Install the keyboard so that the keyboard edges are under the frame. ThinkPad R50/R50p and R51 Series 75 (continued) 76 b b 1060 DIMM (standard) For access, remove these FRUs in order: v ThinkPad R50/R50p and R51 Series 77 1070 Modem daughter card (MDC/MDC-2) For access, remove these FRUs in order: v 78 Turn the card over 3 , and detach the modem connector 4. ThinkPad R50/R50p and R51 Series 79 1080 Bluetooth/Modem daughter card (BMDC/BMDC-2) For access, remove these FRUs in order: v 80 ThinkPad R50/R50p and R51 Series 81 1090 Keyboard bezel For access, remove these FRUs in order: v 82 (continued) 1 1 ThinkPad R50/R50p and R51 Series 83 M2 12 mm, bind-head, nylon-coated (3) (2.5 kgfcm) 4 4 M2 12 mm, bind-head, nylon-coated (2) (2.5 kgfcm) 5 5 84 (continued) 3. Attach the touch pad connector 4. ThinkPad R50/R50p and R51 Series 85 1100 Mini PCI adapter 86 ThinkPad R50/R50p and R51 Series 87 88 MAIN ThinkPad R50/R50p and R51 Series 89 AUX 1110 Fan assembly For access, remove these FRUs in order: v v v 90 (Bottom view of the fan assembly) 1 M2 10 mm, flat-head, nylon-coated (3) 1120 CPU ThinkPad R50/R50p and R51 Series 91 1130 Backup battery For access, remove these FRUs in order: v v v 92 When installing: 2 is firmly attached. 1140 Speaker assembly For access, remove these FRUs in order: v v v ThinkPad R50/R50p and R51 Series 93 (continued) In step 3 , release the speaker cables from the cable guide a . 94 1150 IEEE 1394 cable For access, remove these FRUs in order: v v v v v ThinkPad R50/R50p and R51 Series 95 (continued) Note Some models do not have the IEEE 1394 cable. 96 Before remove the IEEE 1394 cable, remove bracket structure 5 . (continued) Removing and replacing a FRU ThinkPad R50/R50p and R51 Series 97 1160 PC Card slots assembly For access, remove these FRUs in order: v v v v v v 98 (continued) 1 M2 4 mm, flat-head, nylon-coated (2) ThinkPad R50/R50p and R51 Series 99 1170 Ultrabay Enhanced shield kit For access, remove these FRUs in order: v v v v 100 (continued) Note: For the other models, skip this step. 2 a 3 ThinkPad R50/R50p and R51 Series 101 (continued) 2 M2 12 mm, bind-head, nylon-coated (1) Removing and replacing a FRU 102 When installing: Make sure that the connectors 5 are firmly attached. (continued) ThinkPad R50/R50p and R51 Series 103 For models with M9-32 or M10 GL-128 video chip: 104 For models with M7-32 video chip: (continued) 7 M2 12 mm, bind-head, nylon-coated (2) Removing and replacing a FRU (continued) Removing and replacing a FRU ThinkPad R50/R50p and R51 Series 105 11 11 12 13 106 14 1180 LCD assembly For access, remove these FRUs in order: v v v v (BMDC/BMDC-2) on page 80 v v ThinkPad R50/R50p and R51 Series 107 (continued) 1 M2.5 4.8 mm, bind-head, nylon-coated (4) 108 Removing and replacing a FRU Step Screw (quantity) Color Torque 5 M2 6 mm, bind-head, nylon-coated (1) (continued) (2.5 kgfcm) 7 M2 6 mm, bind-head, nylon-coated (1) ThinkPad R50/R50p and R51 Series 109 Removing and replacing a FRU 110 1190 VGA and Ultrabay Enhanced device eject button cable For access, remove these FRUs in order: v v v v v v v ThinkPad R50/R50p and R51 Series 2 M2 4 mm, flat-head, nylon-coated (1) When installing: Make sure that the connector 1 is firmly attached. (continued) 112 a ThinkPad R50/R50p and R51 Series b 4 Hex stud (2) Silver 0.392 Nm (4 kgfcm) Removing and replacing a FRU 1200 System board, interposer card, and base cover 114 (continued) ThinkPad R50/R50p and R51 Series 116 (continued) ThinkPad R50/R50p and R51 Series 118 5 Hex stud (2) Silver 0.392 Nm (4 kgfcm) 6 M2.5 3 mm, flat-head, nylon-coated (1) ThinkPad R50/R50p and R51 Series (4 kgfcm) Removing and replacing a FRU 120 b a 2010 LCD front bezel ThinkPad R50/R50p and R51 Series 121 (continued) cap Screw (quantity) Color Torque 1 122 2020 Inverter card 124 When installing: in this figure. ThinkPad R50/R50p and R51 Series 125 (continued) 4a 126 4a 5 M2 4 mm, bind-head, nylon-coated (2) ThinkPad R50/R50p and R51 Series 127 (continued) Removing and replacing a FRU Remove the antenna assembly ( a ). 128 Remove the hinges ( b ) from the LCD assembly. (continued) (continued) ThinkPad R50/R50p and R51 Series 129 130 When installing: as in this figure. ThinkPad R50/R50p and R51 Series 131 132 2. Route the antenna cables as in the following drawings: (continued) d 3. Route the cables as in the figure below. ee ThinkPad R50/R50p and R51 Series 133 3010 ThinkPad Dock II PCI cover (Bottom view) 134 3020 ThinkPad Dock II top cover (Rear view) ThinkPad R50/R50p and R51 Series 135 (continued) 1 M2.5 4.8 mm (3) 0.392 Nm 136 (continued) ThinkPad R50/R50p and R51 Series 137 Locations Front view 138 Page Rear view 140 12 R 3 Bottom view ThinkPad R50/R50p and R51 Series 141 Locations Parts list R50/R50p and R51 series model matrix 142 (continued) ThinkPad R50/R50p and R51 Series 143 144 (continued) ThinkPad R50/R50p and R51 Series 145 146 (continued) ThinkPad R50/R50p and R51 Series 147 148 (continued) ThinkPad R50/R50p and R51 Series 149 150 (continued) ThinkPad R50/R50p and R51 Series 151 152 (continued) ThinkPad R50/R50p and R51 Series 153 154 (continued) ThinkPad R50/R50p and R51 Series 155 156 (continued) ThinkPad R50/R50p and R51 Series 157 158 (continued) ThinkPad R50/R50p and R51 Series 159 160 (continued) ThinkPad R50/R50p and R51 Series 161 162 (continued) ThinkPad R50/R50p and R51 Series 163 164 (continued) ThinkPad R50/R50p and R51 Series 165 166 (continued) ThinkPad R50/R50p and R51 Series 167 168 (continued) ThinkPad R50/R50p and R51 Series 169 170 (continued) ThinkPad R50/R50p and R51 Series 171 172 (continued) ThinkPad R50/R50p and R51 Series 173 174 (continued) ThinkPad R50/R50p and R51 Series 175 176 ThinkPad R50/R50p and R51 Series 177 US TopSeller models 178 (continued) ThinkPad R50/R50p and R51 Series 179 Odyssey/Open bay models 180 (continued) ThinkPad R50/R50p and R51 Series 181 182 Express models (continued) ThinkPad R50/R50p and R51 Series 183 184 ThinkPad R50/R50p and R51 Series 185 Express open bay models 186 (continued) ThinkPad R50/R50p and R51 Series 187 188 Overall 190 (continued) ThinkPad R50/R50p and R51 Series 191 192 (continued) ThinkPad R50/R50p and R51 Series 193 194 (continued) ThinkPad R50/R50p and R51 Series 195 196 (continued) ThinkPad R50/R50p and R51 Series 197 198 (continued) ThinkPad R50/R50p and R51 Series 199 200 No. FRU P/N CRU ID 6 128-MB DDR SDRAM SO DIMM (PC2700) OP v v (continued) ThinkPad R50/R50p and R51 Series 201 31P9831 * Parts list 202 (continued) ThinkPad R50/R50p and R51 Series 203 204 (continued) ThinkPad R50/R50p and R51 Series 205 206 (continued) ThinkPad R50/R50p and R51 Series 207 208 (continued) ThinkPad R50/R50p and R51 Series 209 210 (continued) 13R2701 N ThinkPad R50/R50p and R51 Series 211 14.1-in. Korea v v v 13R2697 N 212 (continued) ThinkPad R50/R50p and R51 Series 213 214 (continued) Parts list ThinkPad R50/R50p and R51 Series 215 216 Parts list (continued) ThinkPad R50/R50p and R51 Series 217 218 (continued) Parts list ThinkPad R50/R50p and R51 Series 219 220 (continued) ThinkPad R50/R50p and R51 Series 221 222 (continued) ThinkPad R50/R50p and R51 Series 223 224 (continued) ThinkPad R50/R50p and R51 Series 225 No. FRU P/N CRU ID 17 Intel 226 93P4170 N Parts list (continued) ThinkPad R50/R50p and R51 Series 227 228 (continued) ThinkPad R50/R50p and R51 Series 229 230 93P4202 N System board assembly, M7-32, 10/100 Ethernet v 91P7332 N Parts list (continued) ThinkPad R50/R50p and R51 Series 231 232 (continued) ThinkPad R50/R50p and R51 Series 233 234 91P6829 N Parts list ThinkPad R50/R50p and R51 Series 235 91P6829 N Parts list LCD FRUs k l 236 n m 14.1-in. XGA TFT (continued) ThinkPad R50/R50p and R51 Series 237 238 (continued) ThinkPad R50/R50p and R51 Series 239 240 (continued) ThinkPad R50/R50p and R51 Series 241 242 15.0-in. XGA TFT (continued) ThinkPad R50/R50p and R51 Series 243 244 (continued) ThinkPad R50/R50p and R51 Series 245 246 (continued) ThinkPad R50/R50p and R51 Series 247 248 15.0-in. SXGA+ IPS TFT (continued) ThinkPad R50/R50p and R51 Series 249 250 (continued) ThinkPad R50/R50p and R51 Series 251 252 15.0-in. UXGA IPS TFT ThinkPad R50/R50p and R51 Series 253 15.0-in. QXGA IPS TFT AC adapters 254 Keyboard ThinkPad R50/R50p and R51 Series 255 Table 2. Keyboards for 14.1-in. LCD models 256 Recovery CDs For Windows XP Professional (R50/R50p series) ThinkPad R50/R50p and R51 Series 257 Parts list For Windows XP Professional (R51 series) 258 ThinkPad R50/R50p and R51 Series 259 260 ThinkPad R50/R50p and R51 Series 261 For Windows XP Home Edition (R50/R50p series) 262 For Windows XP Home Edition (R51 series) ThinkPad R50/R50p and R51 Series 263 Parts list 264 Parts list Miscellaneous parts (continued) ThinkPad R50/R50p and R51 Series 265 266 (continued) ThinkPad R50/R50p and R51 Series 267 268 Optional FRUs ThinkPad R50/R50p and R51 Series 269 Parts list Common parts list Tools 270 Power cords (system) For 3-pin power cords: Power cords (ThinkPad Dock and ThinkPad Dock II) ThinkPad R50/R50p and R51 Series 271 Parts list Notices 272 Trademarks Notices