1 (1D Scanner) Trouble Shooting Guide Version 1.0 ©2012

2 Contents 1. POWER 1-1 Battery Check 1-2 Power problem 2. LCD 2-1 Touch 2-2 Touch check 3. PHONE 3-1 Phone not turning on 3-2 Bad signal reception 4. WLAN 4-1 WLAN not turning on 4-2 Bad signal reception 5. SCANNER 5-1 Scanner beam problem 6. CAMERA 6-1. Camera not turning on 7. BLUETOOTH 7-1 Bluetooth not turning on 8. BUTTON 8-1 Key press not detected 9. SOUND 9-1 Speaker doesn’t work 10. System freeze 10-1 Freeze during booting 11. ECO 11-1 Main PCB modification QVGA  VGA 11-2 Main PCB modification for scanner 11-3 Freeze in low temperature

3 1. POWER 1) Check the main battery - measure voltage  4.0V(3.7~4.2) is normal. Replace if not 2) Check main board - Check if the battery contact pin is not damaged  Replace the main PCB if damaged 3) CPU Check - Replace the CPU and check if the power turn on 1-1 Battery check CPU part number:

4 1. POWER 1-2 Unit not turning on 1) Fuse check - Check the fuse (f1)  Replace the key PCB if the fuse is broken

5 2. LCD 2-1 Touch 1) Touch check - Check if there is any dent on the screen - Try screen alignment  Replace the touch screen 2) Main board check - Test touch after replacing the main PCB with good one.  Replace the main PCB if touch works after replacement. 3) CPU Check - Test touch after replacing the CPU  Replace the CPU if touch works after replacement. - CPU part no. :

6 2. LCD 2-2 How to check touch screen 1) Click on Start 2) Click on notes 3) Draw circles and lines on the screen

7 3. PHONE 3-1 Phone not turning on 1) Check the SIM card  If SIM is bad, it will not access to the network 2) Module re-assembly  The module may be disconnected from the main PCB 3) Module replacement  Replace the defective module - HSDPA part no. :

8 3. PHONE 3-2 Bad reception signal 2) Check antenna (on rear case) Antenna part no. : ) Main PCB check - check after replacing the main PCB 1)Check antenna cable  Try after replacing the cable Antenna cable part no.:

9 4. WLAN 4-1 WLAN not turning on 1)Check WLAN module connection 2)Try replacing the module - WLAN module part no ) Main PCB check - Check the WLAN connector A cushion can be used to prevent module displacement.

10 4. WLAN 4-2 Bad WLAN signal 1) Check WLAN cable and module WLAN module WLAN cable ) WLAN antenna check -The antenna can be detached. -Re-solder or replace the main PCB

11 5. Scanner 5-1 Scanner beam problem 1)Check scanner firmware  If F/W and scanner module does not match, scan will not work.  i.e. Opticon scanner require Opticon F/W 2) Check cable connections - Try after re-assembly 4) Check SCAN SUB PCB SCAN SUB PCB part no.: ) Try after replacing the scanner module

12 6. CAMERA 6-1. Camera not turning on 3) Main PCB check (Check connector) 4) Check after replacing the CPU 1)Check module connection 2)Try replacing the module - Camera part no.:

13 7. BLUETOOTH 7-1 BLUETOOTH not initialized 1) Test after replacing the main PCB

14 8. KEY 8-1 Key press is not detected Button press can be checked using Key Monitor program. 1) Test after replacing the key PCB cable and/or key PCB - KEYPCB part no.: ) Test after replacing the main PCB 3) Test after replacing the CPU

15 1) Check speaker - see if there is broken wire - Speaker part no. : ) Check resistance of speaker  8Ω(7.6~8.4) is normal resistance. Replace if not. 3) Test after replacing the CPU 9. SOUND 9-1 Speaker doesn’t work

Freeze 10-1 Freeze during booting 1) Enter boot menu and re-install the OS 2) Test after CPU replacement

ECO 11-1 Main PCB modification QVGA  VGA 1) Insert 0Ω to R356, R357 to use with VGA LCD

ECO 11-2 Main PCB modification – Opticon scanner 1)Solder Opticon SCAN SUB PCB to main PCB - SCAN SUB PCB part no.: (SCAN SUB PCB ) 5-3 Main PCB modification – Symbol scanner 2) Insert 100KΩ to R255 for SYMBOL HW (SE955)

ECO 11-3 Freeze in low temperature * This problem only appears on CPU version ) Replace the CPU with good one. 1) Tantal change Two capacitors should be marked with AN7. If not, the CPU can stop working in low temperature.