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. [. . . ] Disconnect the AC Adapter and install the charged battery pack; then check that power is supplied by the battery pack. If you suspect the problem is due to the AC Adapter, go to "AC Adapter Checkout". If you suspect the problem is due to the battery pack, go to "Battery Pack Checkout". External Power/Charge Status LED indicates the following status: LED Amber Green Green AC Adapter Connected Connected Connected Battery Pack Li-ion (standard or highcapacity battery) Li-ion (standard or highcapacity battery) Dry cell battery is connected or no battery is connected -- Charge Status Not full Full -- Not lit Not connected -- WorkPad z50 Mobile Companion 9 AC Adapter Checkout: You are here because the WorkPad z50 fails only when the AC Adapter is used. · · If the power problem occurs only when the cradle is used, replace the cradle. If the power-on indicator for the AC Adapter does not turn on, check the power cord of the AC Adapter for correct continuity and installation. Unplug the AC Adapter cable from the WorkPad z50 and measure the output voltage at the plug of the AC Adapter cable. See the following figure: 1. 2 1 Pin 1 2 Voltage (V dc) 19 V (+ 1. 5 V, - 0 V) Ground a. Unplug the AC Adapter cable from the ac power outlet and wait 5 minutes or longer to allow the overvoltage protection circuit or other protection circuits to be fully discharged and initialized. 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. 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. Remove the dry cell battery pack and measure the voltage between the battery terminals. [. . . ] Screw Type of Head Color Length (mm) 3 5 6 7 Flat M2. 5 Flat Pan M2. 0 Flat M2. 5 Black Silver Silver Black 4. 0/6. 0 5. 0 4. 0/6. 0 8. 0 32 IBM WorkPad z50, Mobile Companion 32 Unplugging and Plugging Flexible Cables: Two types of cable and connectors are used in the WorkPad z50. Some connectors have a clasp, which must be unlocked before removing the cable. Unlock the connector by pulling up the clasp with your fingernail or a small flattipped screwdriver. Refer to the following illustrations: WorkPad z50 Mobile Companion 33 Removal reference The chart below shows the order for removing FRUs. [. . . ]