4. Maintenance
4.1 Troblueshooting
This table offers the fundamental guidelines for troubleshooting advice for the MP2110A series. Before
sending the repeater back to the factory for service, please check the troubleshooting measures listed
below first.
Status
Possible reason
Solution
No LED is lit
No AC power.
Check if the power cord is
plugged into the repeater and
the socket properly.
No amplification after repeater
installed.
1. Your phones is showing LTE or
GSM signals.
2. Donor Signal is poor
3. Bad service antenna/cables
4. Wrong operator band?
1. If you have a LTE/4G phone it
would probably lock to LTE/4G
signal (even if that signal is very
low) when you are not making
phonecalls. This is normal.
Test by locking your phone in 3G
only mode or test by making a
phone call and see if it switches
to 3G.
2. Ensure signal strength and
signal quality at the donor
antenna is good enough. Check
signal meter on the repeatre for
input signal
3. Check cables and connector to
the internal service antenna.
4. Check the selected operator
band by the software.
Coverage decreased after certain
period.
1. Donor signal strength
decreased.
2. The quality of feeder cable
system decreased due to oxidiza-
tion especially in harsh condi-
tions, or cable damage by mice or
insects.
3. Change of indoor structure or
furniture.
1. Check the signal strength at
donor antenna. Re-locate the
Donor Antenna to solve problem.
2. Check the VSWR of the feeder
cable system to find out the
faulty point and then replace it
3. Reconsider the position of
antennas and the layout of
cables if such change occurs.
Bad Ec/No Quality inside the
coverage area
1. Self-oscillation occurred
severely. ISOLATION LED may be
lighted in red.
2. Poor Ec/No Quality from donor
source
1. Check the isolation between
donor and server antenna.
2. Adjust the donor antenna
direction or relocate the donor
antenna.
Call drop frequently
1. Self-oscillation occurred.
2. Signal handover frequently.
3. Donor BTS problem
1. Check the isolation between
donor and server antenna. Turn
on the Intelligent Mode
2. Make sure the RSCP for pri-
mary BCCH > than 1st neighbor
BCCH 6dB
3. Consult the operator’s RF
engineer.
