Hardware manual

2
Table of Contents
OVERVIEW ..................................................................................................................................... 3
PORTS .......................................................................................................................................... 5
POWER CONNECTOR ..................................................................................................................... 5
DB9 RS232 CONNECTOR .............................................................................................................. 5
DB15 SWITCH/LED CONNECTOR ................................................................................................... 6
ETHERNET .................................................................................................................................... 9
USB ............................................................................................................................................. 9
DB15 VGA CONNECTOR................................................................................................................ 9
TRIPLE RCA COMPONENT HD VIDEO CONNECTOR .......................................................................... 9
1/8” AUDIO CONNECTORS ............................................................................................................ 10
HDMI CONNECTOR...................................................................................................................... 10
5V SERIAL CONNECTOR ............................................................................................................... 10
POWER USAGE ........................................................................................................................... 11
ENVIRONMENTAL ....................................................................................................................... 11
MECHANICAL............................................................................................................................... 12
THEORY OF OPERATION ........................................................................................................... 13
POWER SUPPLY .......................................................................................................................... 13
RESET ........................................................................................................................................ 13
PNX8935 CPU........................................................................................................................... 13
BUILT IN FLASH............................................................................................................................ 13
SDRAM ..................................................................................................................................... 13
SERIAL PORT .............................................................................................................................. 13
VIDEO ENCODER AND FILTER ....................................................................................................... 13
HDMI ENCODER .......................................................................................................................... 14
AUDIO OUTPUTS .......................................................................................................................... 14
ON BOARD LEDS ........................................................................................................................ 14
ON BOARD SWITCH ..................................................................................................................... 14
RESET SWITCH/GPIO BUTTON: .................................................................................................... 14
SDHC & SD FLASH SLOT............................................................................................................ 14
NAND FLASH .............................................................................................................................. 15
ETHERNET .................................................................................................................................. 15
USB ........................................................................................................................................... 15
APPENDIX A................................................................................................................................. 16
FLOW CHART: (FOR REPAIR CENTER USE) ........................................................................... 16
(1) POWER START ....................................................................................................................... 16
(2) POWER LED COMES ON, NO SERIAL PORT OUTPUT................................................................... 17
GENERAL TROUBLESHOOTING NOTES:................................................................................. 19
1) •VTT (1.25V) SHOULD BE HALF OF VDD (2.5V).................................................................... 19