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Appendix 3. Troubleshooting
Couldn’t Dial-in and
Dial-out Using
batteries
LCD black screen
No dial tone
Couldn’t hear of the
sound during call
Sound is too loud or
has noise
Can’t work
No response to
keystroke
Signal indication is
unstable
Can’t login the network
Ring volume too small
or no sound
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1.The Voltage of battery is low, please recharge
up. 2.Tole of Battery box isn’t connected well.
1. Power supply isn’t connected well. 2. LCD was
not joined well, please check the line of front
plate and motherboard.
1.Check the joint of handset and phone, please
connect it again. 2.The line of handset or
earphone in handset is broken.
1.Handset was not joined well with
motherboard please join it again. 2.The line of
handset or earphone in handset is broken.
1.Network signal is interfered. 2.Sound sets too
loud, press “UP” or “DOWN” to adjust during call.
1.Press “ON/OFF” to restart. 2.Power supply
doesn’t connect well. 3.Power switch is broken.
The line of keyboard isn’t connected well, please
check the line of front plate and motherboard.
1.Network signal is unstable, please pull out the
antenna. 2.Antenna is loose turn the screw to
the right to tighten it.
1. SIM card doesn’t fix well. 2. SIM card is
locked, take SIM card out and set it’s PIN to
1234, close PIN yard. 3. Network signal is
unstable.
1.Turn audio-switch to side of H.
Users Manual
200S GSM Desktop Phone