Sharp LC-13SH1E, Руководство по обслуживанию

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LC-13SH1E
LC-15SH1E
TROUBLE SHOOTING TABLE
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No picture and No sound
Back light lamp failure to light up
Replace F7701.
Is Q7702 base voltage at "L" state?
Check all output voltage line for short circuit.
Do fuse F7701 function?
Are T7701 secondary output at C7720, C7721, C7722, C7723 and C7725 voltage normal?
Check Q6700- Q6702, Q6707- Q6709 and their peripheral parts for short circuiting.
Is there any short circuit in INV +B line? Check the OFL1 line, OFL2 line, IC1201 and their peripheral parts. Check the OFL line, Q3600, Q3601 and their peripheral parts. Check Q6700- Q6702, Q6707- Q6709 and their peripheral parts.
Replace the back light lamp with new one and check again.
Do fuse F6700, F6702 function?
Are the pins (40) and (138) of IC1201 in the "H" state?
Are the outputs of Q3600 and Q3601 in the "L" state? Is the pins (4) and (7) of T6701-T6704 normal? Is the pin (10) of T6701 normal?
Check the error amp circuit D6705, D6707, D6710, D6712, D6715, D6716, Q6706, Q6713 and their peripheral parts.
Remove F7701 and check the load side. Is there short- circuit? Is there any short- circuit in T7701 primary side periphery?
Check IC7702, IC7704 and their peripheral parts.
Check IC7701 and its peripheral parts.
Is T7701 primary switching waveform at pin (1) of IC7701 normal?