Troubleshooting guide

P:\WINWORD\P:\WINWORD\Torch Service Guide 46 and 52inch screens\
Service Guide for EN069K series 46 & 52 inch LCD screen.doc Page 12
Troubleshooting the UPS
Removal and Access to the UPS
Remove the four mounting tray screws from the rear panel, (M4x8) 3 black, and 1 zinc.
(earth screw) Lift out the tray and lay on the back of the screen, conduct tests, following
the troubleshooting guide. If, after testing, the UPS it is found to have failed, replace the
battery or fit replacement UPS. (See following pages)
Problem Possible cause Actions
When switched on LED’s do not
light up and there are no bleeps (the
green LED, marked 4 in the diagram
on the previous page should always
be on when mains power is
connected)
UPS may be
disconnected from the
AC mains input
Remove the AC power input.
Inspect the installation, check
all cable connectors and
cables
No AC power input Check AC power source No Green power LED
Fuse blown or loose Check fuse, 4A 220v 20x5mm
AC input voltage is too
low
Inspect AC input voltage
Battery voltage low or
battery faulty
Recharge for 4hrs, and retest
Red and Amber LED’s are both on
UPS has failed Contact supplier
Abnormal voltage Press the test button, if
problem remains, disconnect
the AC mains power input,
reconnect the AC mains
input, retest
Green and Red LED’s are both on
Recharge device
malfunction
Contact supplier