Zebra TC21 Product Reference Guide

Maintenance and Troubleshooting
193
5-Slot Ethernet Cradle Troubleshooting
4-Slot Battery Charger Troubleshooting
Table 20 Troubleshooting the 5-Slot Ethernet Cradle
Problem Cause Solution
During
communication, no
data transmits, or
transmitted data was
incomplete.
Device
removed from
cradle during
communication
s.
Replace device in cradle and retransmit.
Incorrect cable
configuration.
Ensure that the correct cable configuration.
Device has no
active
connection.
An icon is visible in the status bar if a connection is currently
active.
Battery is not
charging.
Device
removed from
the cradle too
soon.
Replace the device in the cradle. The standard battery
charges from fully depleted to 90% in approximately three
hours. The extended battery charges from fully depleted to
90% in approximately four hours.
Battery is faulty. Verify that other batteries charge properly. If so, replace the
faulty battery.
Device is not
inserted
correctly in the
cradle.
Remove the device and reinsert it correctly. Verify charging
is active. Touch > System > About phone > Status to
view battery status.
Ambient
temperature of
the cradle is too
warm.
Move the cradle to an area where the ambient temperature
is between 5°C (41°F) and 40°C (104°F).
Table 21 Troubleshooting the 4-Slot Battery Charger
Problem Cause Solution
Spare Battery
Charging LED does
not light when spare
battery is inserted.
Spare battery is
not correctly
seated.
Remove and re-insert the spare battery into the charging
slot, ensuring it is correctly seated.

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