AL2023W Service Guide
Page 2
... its distributor, of its dealer) assumes the entire cost of merchantability or fitness for any particular purpose, Any Acer Incorporated software described in the software. Should the programs prove defective following their respective holders. - 2 - Disclaimer The information in this manual is...transcribed, stored in a retrieval system, or translated into any language or computer language, in any form or by Acer Incorporated. No part of Acer Incorporated. Pentium and Pentium II/III are trademarks and/or registered trademarks of Intel Corporation. Copyright Copyright © ...
... its distributor, of its dealer) assumes the entire cost of merchantability or fitness for any particular purpose, Any Acer Incorporated software described in the software. Should the programs prove defective following their respective holders. - 2 - Disclaimer The information in this manual is...transcribed, stored in a retrieval system, or translated into any language or computer language, in any form or by Acer Incorporated. No part of Acer Incorporated. Pentium and Pentium II/III are trademarks and/or registered trademarks of Intel Corporation. Copyright Copyright © ...
AL2023W Service Guide
Page 3
Alerts you to do specific actions relevant to the current topic. Gives precautionary measures to avoid possible hardware or software problems. Reminds you to any damage that appear on screen Gives bits and pieces of additional information related to the accomplishment of procedures. - 3 - Conventions The following conventions are used in this manual: Screen messages Note Warning Caution Important Denotes actual messages that might result from doing or not doing specific actions.
Alerts you to do specific actions relevant to the current topic. Gives precautionary measures to avoid possible hardware or software problems. Reminds you to any damage that appear on screen Gives bits and pieces of additional information related to the accomplishment of procedures. - 3 - Conventions The following conventions are used in this manual: Screen messages Note Warning Caution Important Denotes actual messages that might result from doing or not doing specific actions.
AL2023W Service Guide
Page 44
Chapter 4 TROUBLE SHOOTING This chapter provides trouble shooting information for AL2023W 1. No Power No Power NO Change Power Board No Check Short Of Main Board NO Change Q3,D1,U1,D2 NO Change X1 NO Change U5 or U4 Change U5 RUN Software ISP Check Bottom Board Check CN1 +12V and +5V Yes Check D1=1.8V U1 out=3.3V Yes Check X1=24MHz Yes Check U5 Pin 42,43 Clock Yes Check U6 Pin 42,43 Clock NO Change U6 - 44 -
Chapter 4 TROUBLE SHOOTING This chapter provides trouble shooting information for AL2023W 1. No Power No Power NO Change Power Board No Check Short Of Main Board NO Change Q3,D1,U1,D2 NO Change X1 NO Change U5 or U4 Change U5 RUN Software ISP Check Bottom Board Check CN1 +12V and +5V Yes Check D1=1.8V U1 out=3.3V Yes Check X1=24MHz Yes Check U5 Pin 42,43 Clock Yes Check U6 Pin 42,43 Clock NO Change U6 - 44 -