Lenovo ThinkPad 365E-ED ThinkPad 365, SelectaDock I - Hardware Maintenance Man - Page 48
Checking the AC Adapter, Port Replicator Power Overload
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6. Remove the memory card and PCMCIA cards and check the power supply. Reinstall one at a time and check the power supply. 7. Disconnect the AC Adapter. Remove the CD-ROM and Audio Card. Reinstall one at a time, connect the AC Adapter and check that power is supplied. If you suspect a power problem, see the appropriate power supply check listed below. "Checking the AC Adapter." "Checking Operational Charging" on page 37. "Checking the Battery Pack" on page 37. "Port Replicator Power Overload" on page 40. Checking the AC Adapter: You are here because the computer fails only when the AC Adapter is used. If the power problem occurs only when the port replicator is used, replace the replicator. If the power-on indicator does not turn on, check the power cord of the AC Adapter for correct continuity and installation. If the operational charge does not work, go to "Checking Operational Charging" on page 37. Use the following procedure to check the adapter. 1. Unplug the AC Adapter cable from the computer and measure the output voltage at the plug of the AC Adapter cable. See the following figure. Pin Voltage (V dc) 1 +10.0 to +16.0 2 Ground If the voltage is correct: - Replace the DC/DC Card. - If the problem remains, replace the system board. If the problem still is not corrected, go to "Undetermined Problems" on page 49. If the voltage is not correct, go to the next step. 2. Unplug the AC Adapter cable from the ac power outlet and wait five minutes or longer to allow the over voltage protection circuit to be fully discharged and initialized. 3. Plug the AC Adapter cable into the ac power outlet. 36 IBM Mobile Systems - ThinkPad HMM Volume 3