XOCECO LC-42FE32, Руководство по обслуживанию

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3.5 A certain channel fails to work properly
a) AV/S-terminal with no picture
b) TV with no picture
Note: “main” means main channel; “sub” means sub-channel.
Check if R713 or R714 has input
signal
Check if C19, C23(sub) or C272,
C271(main) have input signal Check the signal source
Check each channel between
socket and N37 or N2. Check periphery circuit of
N37(sub) or N2(main) and
power supply circuit
Yes No
Yes No
Check if 55# R845(main) or R807(sub)
has output signal
Check if C22(sub) or
C262(main) has input signal
Check periphery circuit of
T700(sub) or T740(main) and
power supply
Check N37 and its periphery
circuit, then refer to (3)
checking procedure
Check signal
transmission circuit
Yes
No
Yes No