XOCECO LC-32K16, Service Manual

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darkest area of the picture Possibly the brightness grade of DVD player
(broadcaster) is set too high.
No picture or signal produced from the
displayer if “XXX in search” appears. Check if the cable is disconnected.
Check if it’s connected to the proper terminal or if the
input mode is correct.
There appears an indication - “outside
the receivable scope) Check if the TV set can receive input signal. The
signal is not correctly identified and VGA format is
beyond the specified scope.
Remote control cannot work properly Check if the batteries are installed in the reverse
order.
Check if the battery is effective.
Check the distance or angle from the monitor.
Check if there is any obstruct between the remote
control and the TV set.
Check if the remote control signal- receiving window
is exposed to strong fluorescence.
No picture and sound, but only hash. Check if the antenna cable is correctly connected, or
if it has received the video signal correctly.
Blur picture Check if the antenna cable is correctly connected.
Of if it has received the right video signal.
No sound Check if the “mute” audio frequency setting is
selected.
Check if the sound volume is set to minimum.
Make sure the earphone is not connected.
Check if the cable connection is loose.
When playing VHS picture search
tape, there are lines at the top or
bottom of the picture. When being played or in pause VHS picture search
tape sometimes can’t provide stable picture, which
may lead to incorrect display of the liquid crystal TV,
In this case please press “auto” key on the remote
control so as to enable the liquid crystal TV set to
recheck the signal and then to display correct picture
signal
LC-32K16 working principle analysis
Please refer to LC-32K16 BLOCK DIAGRAM in order to know the working principle of LC-32K16
brief introduction to its signal flow is shown as follows:
RF signal produces composite color television signal through TUNER201, the signal together with
AV1/SVHS (SVHS priority) and AV2 etc. are sent to U29 VPC3230D to decode and do switching
selection. The same time, the VIDEO signal sent to AV output. After via U29 decode, the 8BIT for
ITU-R656 format signal to U13(FLI2310) to non-interlaced processing.
After the YPRPB signal to U30(MST9883) A/D conversion, the 24BIT for YUV to FLI2310.