Intermec CK30 Service Manual page 13

CK30 Handheld Computer Service Manual
Troubleshooting the CK30 (continued)
Problem
Nothing is displayed on the
screen.
Backlight does not work.
Scanner does not emit a
beam, or scanner emits a
beam but does not scan the
bar code.
Chapter 1 — Troubleshooting
Solution
Try these possible solutions in order:
The contrast may be set too light or too dark. Press
•
B and then E repeatedly until you reach the desired
contrast level.
If you have a CK30 with a color screen, make sure the
•
backlight is on by pressing E.
The display flex cable may be disconnected. Make
•
sure the display flex cable is connected to the display
assembly and the main PCB.
The display assembly may be damaged. For help, see
•
the "Replacing the Display Assembly" procedure on
page 18.
The main PCB assembly display interface may have
•
failed. For help, see the "Replacing the Main PCB"
procedure on page 15.
Try these possible solutions in order:
Make sure you have a charged battery installed
•
correctly. For help, see "Charging and Installing the
Battery" in the CK30 Handheld Computer User's
Manual.
The display assembly may be damaged. For help, see
•
the "Replacing the Display Assembly" procedure on
page 18.
The backlight key on the keypad assembly may not be
•
working properly. For help, see the "Replacing the
Keypad Assembly" procedure on page 20.
The backlight driver on the main PCB assembly may
•
have failed. For help, see the "Replacing the Main
PCB" procedure on page 15.
Try these possible solutions in order:
Make sure the scanner window is clean. If the scanner
•
window is badly scratched, replace the scanner
window.
Make sure the keypad flex cable is connected properly.
•
Make sure the scan engine flex cable is connected
•
properly. If the scan engine flex cable is damaged,
replace it.
The scan engine may be damaged. For help, see one
•
of these procedures: "Replacing the SE1200 Scanner"
on page 21, "Replacing the EV10 Scanner" on page
23, or "Replacing the IT4000 Imager" on page 25.
3