Sonel LKZ-1500, User Manual, Page: 49 / 60

LKZ-1500-
LITE ● LKZ-1500 – USER MANUAL
47

If the battery pack has been completely drained, the battery icon may take some time to
appear on the display.

Charging of standard battery is with the current from 400 mA to 500 mA. When charging
the batteries with other rated capacity, always check the temperature. If it rises quickly,
stop charging.
8 Possible faults and troubleshooting
The possible faults and remedies are listed in tables below.
8.1 LKO-1500 transmitter
Tab. 5 Potential failures of LKN
Type of failure Possible cause Remedial procedure
Transmitter start failure or acci-
dental shutdown
Discharging accumulator Charge accumulator
Accumulator failure
Replace accumulator at the au-
thorized Sonel service.
Accumulator fails to charge within
a given period
Accumulator failure
Replace accumulator at the author-
ized Sonel service.
Power supply unit failure Check power supply unit
8.2 LKO-1500-LITE / LKO-1500 receiver
Tab. 6 Potential failures of LKO
Fault Possible cause Remedies
The Receiver fails to be switched-
on or it is switched off spontane-
ously
Battery is defective or discharged Charge or replace batteries
The battery pack charging process
is not displayed (the battery pack is
not being charged).
Power supply module failure. Inspect the power supply module.
Battery pack failure.
Servicing by the manufacturer is
required. (Battery pack replace-
ment).
The battery pack has been deeply
drained.
Charge the battery pack for at
least 4 hours.
When power supply is on the Re-
ceiver fails to respond to the
Transmitter signal
No contact in antenna plug con-
nector
Repair or replace the headphones.
The headphones show evidence of
cracking.
Repair or replace the headphones.
The headphones fail to deliver
sound whereas the sound is good
through the internal speakers
Break in headphone circuit Repair or replace headphones