Sam4s SAP-630 Series - LAN, USB, Serial Port Problem

6 Troubleshooting
6-4 SAM4S SAP-630 SERIES
6-4 LAN, USB, Serial Port Problem
6-4-1 LAN
 Cable NOT attached (Green LED of LAN connector does not turn on).
→ Check LAN cable. Refer to chapter 2 cable connection diagram.
→ For IRC (Inter Register Communication), It has to be used the cross cable.
→ For LAN, It has to be used the direct connection cable.
→ Check LAN RJ-45 modular jack insert right position..
 Communication fail occurs (Yellow LED of LAN connector does not blank).
→ Check LAN cable whether cable wire is open or not.
→ Check cable length. Based on LAN specification, the cable length has to less than 100M.
→ Check MAIN B’D and related circuit & component whether short or not.
 Related System Clock.
→ Check the crystal, if it operates correctly or not.
→ Clock frequency is 25MHz. (LX1)
6-4-2 USB
 USB device NOT attached and Communication fail occurs.
→ Check USB device whether it is broken or not.
→ Check USB version. This product supports USB 2.0 version.
→ Check related circuit & component whether short or not.
→ Check USB source voltage (+5V) for HID (Ex ; Mouse, Keyboard, Scanner…etc,.)
→ Check the Cable for front USB Connector
6-4-3 Serial (COM#1 ~ COM#4)
 Communication fail occurs.
→ Check communication setting parameter (Speed, Parity, Data Bit…etc,.)
→ Check the interface cable. Refer to Chapter 2 for cable connection.
→ Check the RS232 driving voltage (+12V, -12V).
→ Measure +12V, -12V on main B’D. If -12V voltage level is less than -7.0V, it is OK.
→ Check related circuit & component whether open or not.
→ Check controller chip and related circuit. (COM#1:U43, COM#2:U44, COM#3:U46, COM#4:U45)
→ Perform the loop-back test at self test mode. Refer to Chapter3 for loop-back connection.
 Scanner device NOT attached and Communication fail occurs.
→ The source voltage (+5V) for scanner comes out at COM#1,#2,#3,#4..
→ Check the power consumption of scanner. This product limits the power current;
→ Scanner is less than 300[mA]. (Recommend)
→ Check related circuit & component whether open or not.
6-4-4 SDCARD
 Operation Fail.
→ Performs the SDCARD test at H/W test Utility.
→ Check the harness between SD B’D and Main B’D, if it is connected or not.
→ Check the 10-Pin harness, it is OK or not.
→ Check related circuit & component whether short or not.