Sharp AQUOS LC-13B4E, Service Manual

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LC-13B4E
LC-15B4E
TROUBLE SHOOTING TABLE
No picture and No sound
Check all the settings microprocessor's adjust process menu.
Do F3301 and F3302 function?
Are T3701's secondary outputs, +34V, +9V, +5V and -11V normal?
Remove F3301 and F3302 and check the load side. Is there short-circuiting?
Is there short-circuiting of T3701 primary side periphery, Q3703, Q3704 and S4701.
Replace F3301 and F3302.
Check S4701 and connection cable.
Is T3701's primary oscillator waveform normal?
Check T3701's secondary load.
Yes
Yes
No
No
No
No No
Yes
Check J3701 periphery and connection cable.
Replace F6500~F6501.
Is the pin (120) of IC1201 in the "H" state?
Is the output of Q3606 in the "L
" state?
Yes Yes
No No No
Yes Yes
Check the OFL1 line, IC1201 and their peripheral parts.
Check the OFL line, Q3606 and their peripheral parts.
Check T6500~T6503, Q6500~Q6505 and connection cable.
Back light lamp failure to light up
Is the primary side of T6500 ~T6503 periphery short-circuiting?
Replace the back light lamp with new one and check again.