Troubleshooting
Table 3-1. Troubleshooting
Problem | Possible Causes | Possible Solutions |
|
|
|
Scanner emits short low/short | Scanner is powering up. | Normal when scanner is plugged |
medium/short high beep sequence. |
| in. |
|
|
|
Nothing happens when scan trigger | No power to the scanner. | Check the system power. Ensure |
is pressed. |
| the power supply is connected if |
|
| the configuration requires a power |
|
| supply. |
|
|
|
|
| Power supply is not plugged in. |
|
|
|
| Incorrect host interface cable is | Ensure that correct host interface |
| used. | cable is used. |
|
|
|
| Interface/power cables are loose. | Ensure all cable connections are |
|
| secure. |
|
|
|
| Scanner is disabled. | For Simple Serial Interface (SSI), |
|
| enable the scanner via the host |
|
| interface. Otherwise, see the |
|
| technical person in charge of |
|
| scanning. |
|
|
|
| If using | Assert CTS line. |
| CTS is not asserted. |
|
|
|
|
Scanner emits short low/short | The USB bus may put the scanner | Normal during host reset. |
medium/short high beep sequence | in a state where power to the |
|
more than once. | scanner is cycled on and off more |
|
| than once. |
|
|
|
|
Laser comes on, but scanner does | Scanner is not programmed for the | Ensure the scanner is programmed |
not decode the bar code. | correct bar code type. | to read the type of bar code being |
|
| scanned. |
|
|
|
| Bar code symbol is unreadable. | Check the symbol to ensure it is not |
|
| defaced. Try scanning test bar |
|
| codes of the same bar code type. |
|
| See Appendix C, Sample Bar Codes |
|
| for test bar codes. |
|
|
|
| Bar code is out of range from the | Move scanner closer to or further |
| scanner. | from bar code. |
|
|
|
