Zebra TC21 Product Reference Guide

Maintenance and Troubleshooting
189
Tapping the window
buttons or icons
does not activate the
corresponding
feature.
The device is not
responding.
Reboot the device.
A message appears
stating that the
device memory is
full.
Too many files stored
on the device.
Delete unused memos and records. If necessary,
save these records on the host computer (or use an
SD card for additional memory).
Too many applications
installed on the device.
Remove user-installed applications on the device to
recover memory. Select Settings > Apps &
notifications. Select the app in the list and select
UNINSTALL.
The device does not
decode with reading
bar code.
Scanning application is
not loaded.
Load a scanning application on the device or enable
DataWedge. See the system administrator.
Unreadable bar code. Ensure the symbol is not defaced.
Distance between exit
window and bar code is
incorrect.
Place the device within proper scanning range.
Device is not
programmed for the bar
code.
Program the device to accept the type of bar code
being scanned. Refer to the EMDK or DataWedge
application.
Device is not
programmed to
generate a beep.
If the device does not beep on a good decode, set the
application to generate a beep on good decode.
Battery is low. If the scanner stops emitting a laser beam upon a
trigger press, check the battery level. When the
battery is low, the scanner shuts off before the device
low battery condition notification. Note: If the scanner
is still not reading symbols, contact the distributor or
the Global Customer Support Center.
Device cannot find
any Bluetooth
devices nearby.
Too far from other
Bluetooth devices.
Move closer to the other Bluetooth device(s), within a
range of 10 meters (32.8 feet).
The Bluetooth device(s)
nearby are not turned
on.
Turn on the Bluetooth device(s) to find.
The Bluetooth device(s)
are not in discoverable
mode.
Set the Bluetooth device(s) to discoverable mode. If
needed, refer to the device’s user documentation for
help.
Cannot unlock
device.
User enters incorrect
password.
If the user enters an incorrect password five times,
the user is requested to wait for 30 seconds when
using a PIN, Pattern or Password.
Multi-User mode is
causing undefined
behavior.
Multi-User mode is not
supported by the
Mobility DNA Enterprise
License.
Perform a soft or hard reset on the device.
Table 15 Troubleshooting the Device (Continued)
Problem Cause Solution

Zebra TC21 Specifications

General

Display diagonal	5 \
Touch technology	Multi-touch
Touchscreen type	Capacitive
Display resolution	1280 x 720 pixels
Battery capacity	3100 mAh
Battery life (max)	10 h
Battery recharge time (off)	4 h
Flash memory	32 GB
Internal memory	3 GB
Internal memory type	-
Compatible memory cards	MicroSD (TransFlash), MicroSDHC, MicroSDXC
Maximum memory card size	128 GB
Wi-Fi standards	802.11a, 802.11b, 802.11g, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac)
Bluetooth version	5.0
Security algorithms	EAP-PWD, EAP-PEAP, EAP-TLS, EAP-TTLS, LEAP, MSCHAPv2, WEP, WPA, WPA-AES, WPA-TKIP, WPA2, WPA2-AES, WPA2-TKIP
Rear camera resolution (numeric)	13 MP
USB 2.0 ports quantity	1
RFID reader	No
Scanner type	1D/2D
Certification	RoHS 2011/65/EU; 2015/863 REACH SVHC 1907/2006
Product color	Black
International Protection (IP) code	IP67
Speakers	Mono
Operating system version	10
Operating system installed	Android
Number of cores	8
Processor model	660
Processor family	Snapdragon
Processor frequency	1.8 GHz
Processor manufacturer	Qualcomm
Storage temperature (T-T)	-30 - 70 °C
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	5 - 95 %
Harmonized System (HS) code	84713000

Weight and Dimensions

Depth	13.7 mm
Width	79 mm
Height	158 mm
Weight	236 g