Toshiba Qosmio F50 manual AC powercord AC adaptorcord System Adaptor Board Battery

2￿Troubleshooting￿Procedures￿

Procedure￿3￿ Power￿supply￿connection￿check￿

The￿power￿supply￿wiring￿diagram￿is￿shown￿below:￿

AC power￿cord

AC

AC adaptor￿cord

System

adaptor

board

￿

Battery

Any￿of￿the￿connectors￿may￿be￿disconnected.￿￿Perform￿Check￿1.￿

Check￿1￿ Disconnect￿the￿AC￿power￿cord￿from￿wall￿outlet.￿Check￿the￿power￿cable￿for￿ breaks.￿If￿the￿power￿cord￿is￿damaged,￿connect￿a￿new￿AC￿power￿cord.￿If￿there￿is￿ no￿damage,￿go￿to￿Check￿2.￿

Check￿2￿ Make￿sure￿the￿AC￿adaptor￿cord￿and￿AC￿power￿cord￿are￿firmly￿plugged￿into￿the￿ DC-IN￿socket,￿AC￿adaptor￿inlet￿and￿wall￿outlet.￿If￿these￿cables￿are￿connected￿correctly,￿go￿to￿Check￿3.￿

Check￿3￿ Make￿sure￿that￿the￿DC-IN￿input￿port￿socket￿is￿firmly￿secured￿to￿the￿system￿board￿

of￿the￿computer.￿

•￿ If￿the￿DC-IN￿input￿socket￿is￿loose,￿go￿to￿Procedure￿5.￿

•￿ If￿it￿is￿not￿loose,￿go￿to￿Check￿4.￿

Check￿4￿ Use￿a￿multi-meter￿to￿make￿sure￿that￿the￿AC￿adaptor￿output￿voltage￿is￿close￿to￿19￿V.￿￿If￿the￿output￿is￿several￿percent￿lower￿than￿19￿V,￿go￿to￿Check￿5.￿￿If￿the￿output￿ is￿close￿to￿19￿V,￿go￿to￿Check￿6.￿

Check￿5￿ Connect￿a￿new￿AC￿adaptor￿or￿AC￿power￿cord.￿

•￿ If￿the￿DC-IN￿LED￿does￿not￿light,￿go￿to￿Procedure￿4.￿

•￿ If￿the￿battery￿LED￿does￿not￿light,￿go￿to￿Check￿6.￿

Check￿6￿ Make￿sure￿the￿battery￿pack￿is￿installed￿in￿the￿computer￿correctly.￿￿If￿the￿battery￿is￿ properly￿installed￿and￿the￿battery￿LED￿still￿does￿not￿light,￿go￿to￿Procedure￿4.￿￿

QOSMIO￿F50-￿QOSMIO￿F55-￿DYNABOOK￿QOSMIO￿F50￿Series￿Maintenance￿Manual￿ ￿

￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿12￿