Zebra TC21 Product Reference Guide

Maintenance and Troubleshooting
188
Battery did not
charge.
Battery failed. Replace battery. If the device still does not operate,
perform a reset.
Device removed from
cradle while battery was
charging.
Insert device in cradle. See Charging the Battery on
page 26.
Extreme battery
temperature.
Battery does not charge if ambient temperature is
below 5°C to 40°C (41°F to 104°F).
Cannot see
characters on
display.
Device not powered on. Press the Power button.
During data
communication with
a host computer, no
data transmitted, or
transmitted data was
incomplete.
Device removed from
cradle or disconnected
from host computer
during communication.
Replace the device in the cradle, or reattach the
communication cable and re-transmit.
Incorrect cable
configuration.
See the system administrator.
Communication
software was incorrectly
installed or configured.
Perform setup.
During data
communication over
Wi-Fi, no data
transmitted, or
transmitted data was
incomplete.
Wi-Fi radio is not on. Turn on the Wi-Fi radio.
You moved out of range
of an access point.
Move closer to an access point.
During data
communication over
Bluetooth, no data
transmitted, or
transmitted data was
incomplete.
Bluetooth radio is not
on.
Turn on the Bluetooth radio.
You moved out of range
of another Bluetooth
device.
Move within 10 meters (32.8 feet) of the other device.
During data
communication over
mobile data, no data
transmitted, or
transmitted data was
incomplete.
Mobile data is not on. Turn on mobile data. If it is already on, turn it off and
on again.
You moved out of the
coverage area.
Move into a coverage area.
No sound. Volume setting is low or
turned off.
Adjust the volume.
Device shuts off. Device is inactive. The display turns off after a period of inactivity. Set
this period to 15 seconds, 30 seconds, 1, 2, 5, 10 or
30 minutes.
Battery is depleted. Replace the battery.
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