Acer AL501, Manual

1 

1. ELECTRICAL REQUIREMENTS .................................................................................... 2 

A. LCD Panel Specification............................................................................................................................ 2 
B. Controls ..................................................................................................................................................... 3 
C. Power Management .................................................................................................................................. 3 
D. Display Modes FOR Inspections ............................................................................................................... 5 

2. ADJUSTMENT CONDITIONS......................................................................................... 6 

A. Measuring Apparatuses Used ................................................................................................................... 6 
B. Input Signal................................................................................................................................................ 6 
C. Indication ................................................................................................................................................... 6 

3. ADJUSTMENT OF POWER SUPPLY

...................................................................... 6 

A. Adjustment of Switching Regulator (Adapter) ........................................................................................... 6 

4. ADJUSTMENT OF BOARDS.......................................................................................... 7 

A. Connection Method ................................................................................................................................... 7 

5. VL-531 DISPLAY CONTROL BOARD............................................................................ 7 

A. Description................................................................................................................................................. 7 
B. Features .................................................................................................................................................... 7 
C. Block Diagram (Control Ckt)...................................................................................................................... 8 
D. Connector Locations.................................................................................................................................. 9 
E. Connector Type ......................................................................................................................................... 9 
F. Connector Pin Assignment ...................................................................................................................... 10 

6. VK-531 CONTROL PANEL BOARD............................................................................. 14 

A. Description............................................................................................................................................... 14 
B. Connector and Switch Locations ............................................................................................................. 14 
C. Connector type ........................................................................................................................................ 14 
D. Connector pin Assignment ...................................................................................................................... 15 

7. VP-531 POWER BOARD .............................................................................................. 17 

A. Description............................................................................................................................................... 17 
B. Electrical characteristics .......................................................................................................................... 17 
C. Connector locations................................................................................................................................. 18 

8. CIRCUIT DESCRPTION ............................................................................................... 20 

A. Micro-Controller Circuit............................................................................................................................ 20 
B. Circuit of Plug and Play ........................................................................................................................... 20 
C. System Clock........................................................................................................................................... 20 
D. Image Engine (Zoom).............................................................................................................................. 20 
E. Power Regulator...................................................................................................................................... 20 

9. INTRODUCTION ........................................................................................................... 21 

A. Front Panel Control And Led ................................................................................................................... 21 
B. Rear Panel Connector Input Signals ....................................................................................................... 22 

10.TROUBLESHOOTING................................................................................................. 23 

A. Main Procedure ....................................................................................................................................... 23

APPENDIX A: PARATS LISTS……………..…………………………………………………..28 
APPENDIX B: DISPLAY UNIT ASSEMBLY…………………………………………………..35 
APPENDIX C: P.C.B.A ASSEMBLY………………………………………………………… ...40