User manual IBM WORDPAD Z50 Hardware Guide

[. . . ] IBM Mobile Systems S37L-2095-00 WorkPad z50 Mobile Companion (2608-1Ax) Hardware Maintenance Manual March 1999 Note Before using this information and the product it supports, be sure to read the general information under "Notices" on page 61. First Edition (March 1999) The following paragraph does not apply to the United Kingdom or any country where such provisions are inconsistent with local law: INTERNATIONAL BUSINESS MACHINES CORPORATION PROVIDES THIS PUBLICATION "AS IS" WITHOUT ANY WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE LIMITED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do not allow disclaimer or express or implied warranties in certain transactions; therefore, this statement may not apply to you. This publication could include technical inaccuracies or typographical errors. Changes are periodically made to the information herein; these changes will be incorporated in new editions of the publication. [. . . ] Measure the output voltage of the AC Adapter. If the voltage is still not correct, replace the AC Adapter. An audible noise from the AC Adapter does not always indicate a defect. 2. 3. 5. Note: 10 IBM WorkPad z50, Mobile Companion 10 Battery Pack Checkout: If the battery pack or the optional high-capacity battery have a problem, refer to the following: 1. 2. Enter suspend mode by pressing the Power button. Remove the battery pack and check for any mechanical damage. Replace the battery pack if it is damaged. Note: Damage to the battery pack caused by the customer is not covered by the warranty. 3. Remove the battery pack and measure the voltage between the battery terminals. See the following figure: 1 7 Terminal 1 7 Voltage (V dc) 11. 1 V Ground (-) 4. If the voltage is less than 11. 1 V dc, the battery pack has been discharged. If the voltage is still less than 11. 1 V dc after recharging, replace the battery pack. If the battery pack is extremely hot (over 50°C), replace the battery pack and the mainboard. If the voltage is correct, but you still suspect a problem with the battery pack, go to "Running the Diagnostics Test" on page 27. WorkPad z50 Mobile Companion 11 Checking Operational Charging: There is no difference in battery charging time whether the system is fully operational or not. To check the battery charging, use a discharged battery pack or a battery pack that has less than 50% of total power remaining. Turn on the WorkPad z50 while the AC Adapter is connected to the system. The External Power/Charge Status LED will change to amber while the battery is charging. When the battery is fully charged (after about 1 ­ 2. 5 hrs. , depending on the battery's initial charge) the battery terminal voltage should be around 12. 6V dc. If the voltage is far less, or has not increased from the initial voltage, then repeat the procedure with another discharged battery pack. If this brings the same result, then suspect a mainboard failure. Optional Dry Cell Battery Checkout: If the optional Dry Cell Kit (dry cell battery pack) has a problem, refer to the following: 1. 2. Enter suspend mode by pressing the Power button. Remove the dry cell battery pack and measure the voltage between the battery terminals. See the following figure: 7 1 Terminal 1 7 Voltage (V dc) 8. 8 ­ 12. 8 V Ground (-) 3. If the voltage is less than 8. 8 V dc, the dry cell battery pack has been discharged. If the dry cell battery pack is extremely hot, it must be replaced. 12 IBM WorkPad z50, Mobile Companion 12 Backup Battery Checkout (Nonrechargeable) If removing all power sources except for the backup battery results in the system being reset, suspect a problem with the backup batteries. [. . . ] Unlock the connector by pulling up the clasp with your fingernail or a small flattipped screwdriver. Then pull out the cable from the connector. Refer to the following illustrations: WorkPad z50 Mobile Companion 33 Removal reference The chart below shows the order for removing FRUs. When a FRU has been removed, follow the arrows to the FRU (or FRUs) that can be removed next. 1010 Backup Batteries 1020 ROM/DRAM Card 1030 Battery Pack 1040 Keyboard Assembly 1050 Bottom Cover 1060 Mainboard 1070 LCD Bezel 1080 LCD Unit 1090 Inverter Card and LCD Panel 1110 FPC Assembly 1120 Speaker 1130 Microphone 1150 PC Card Slot Assembly 1160 RJ-11 Assembly 1170 Hardware Button Board 1180 Top Cover 34 IBM WorkPad z50, Mobile Companion 34 1010 Backup Batteries 1. Turn the WorkPad z50 upside down. Step 2 Size (Quantity) Coin screw M2. 5 (1) Color Black Torque 3 kgcm Length 4. 0 mm Note: You can loosen the captive screw in step 2, but cannot remove it from the backup battery cover. WorkPad z50 Mobile Companion 35 1020 ROM/DRAM Card · · Backup Batteries (1010) Battery Pack (1030) Attention Remove all power sources from the WorkPad z50 before replacing the ROM/DRAM card. 1. Turn the WorkPad z50 upside down. DRAM Card ROM Card Step 2 Size (Quantity) M2. 5 (1) Color Black Torque 3 kgcm Length 4. 0 mm Note: You can loosen the captive screw in step 2, but cannot remove it from the ROM/DRAM card cover. 36 IBM WorkPad z50, Mobile Companion 36 WorkPad z50 Mobile Companion 37 1030 Battery Pack 1. Turn the WorkPad z50 upside down. Note At step 3 you must push and hold the battery release lock as you slide the lock in the direction indicated by the arrow. 38 IBM WorkPad z50, Mobile Companion 38 1040 Keyboard Assembly · · Backup Batteries (1010) Battery Pack (1030) Attention Remove all power sources from the WorkPad z50 before removing the keyboard assembly. [. . . ]