Motorola MT2070 User's Guide Page 486

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15 - 4 Symbol MT2070/MT2090 User Guide
Device emits aiming pattern, but
does not decode the bar code.
Device is not programmed for the
correct bar code type.
Program the device to read that type of
bar code. See
Chapter 12,
Symbologies
.
Bar code symbol is unreadable. Scan test symbols of the same bar
code type to determine if the bar code
is defaced.
The symbol is not completely inside
aiming pattern.
Move the symbol completely within the
aiming pattern.
Scan window may be dirty. Clean the scan window.
See
Maintenance on page 15-1
.
Battery Charging
Device does not boot when a
USB cable is attached.
The device’s battery is discharged. Normal behavior if the battery is
severely discharged. The battery must
charge at a reduced charge rate until
the battery acquires sufficient charge to
boot the device. This can take up to 2
hours, depending on the level of battery
discharge.
Device is attached to a host PC
via USB cable; PC register
boots up after being powered
down for an extended period of
time; device does not boot.
When the host is powered down, the
device remains powered from its
battery. This can result in a completely
discharged battery.
See above.
Beeping Sequences
Device emits short low/short
medium/short high beep
sequence (power-up beep
sequence) more than once.
The USB bus may put the device in a
state where power to the device is
cycled on and off more than once.
Normal during host reset.
Device emits 4 short high beeps
during decode attempt.
Device has not completed USB
initialization.
Wait several seconds and scan again.
Device emits high/high/high/low
beeps when not in use.
RS-232 receive error. Normal during host reset. Otherwise,
set the device's RS-232 parity to match
the host setting.
Device emits low/high beeps
during programming.
Input error or
Cancel
bar code was
scanned.
Scan the correct numeric bar codes
within range for the parameter
programmed.
Device emits low/high/low/high
beeps during programming.
Out of ADF parameter storage space. Erase all rules and re-program with
shorter rules.
Device emits a power-up beep
after changing USB host type.
The USB bus re-established power to
the device.
Normal when changing USB host type.
Table 15-1
Troubleshooting the MT20X0 (Continued)
Problem Possible Causes Possible Solutions
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