XOCECO LC-42HW36, Руководство по обслуживанию

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5. A certain channel is abnormal
5.1 No picture on AV1
5.2 No picture on S-terminal
5.3 No picture of TV channel
First you should make sure that the problem exits in mainframe or sub frame by using the PIP
function
5.3.1 mainframe
5.3.2 sub frame
Check NS01 peripheral circuit.
Check if the CS10 has
the signal input.
Check periphery circuit of NS01,
crystal and power supply
The path from AV1 terminal
to NS01 has problem
Yes No
Check if the CS10 and CS16
input the signal.
Check periphery circuit of NS01,
crystal and power supply
Yes No
Check if the C1S15 have the
signal input.
Check if the pin12 of TUNER1
has output signal.
Check periphery circuit of NS01,
crystal and power supply
Check the periphery circuit
of TUNER1, power supply
and bus line
Check the circuit between
TUNER1 and NS01
Yes
No
Yes No
The path from S terminal
to NS01 has problem