SHARP LC15M4E
Instrukcja Serwisowa

picture, No sound Fluorescent lamp failure to light up

Check all the settings microprocessor's adjust process menu.

No Remove F701 and
Is there short-circuiting?

Do F701 check the load side. F701. Does F703 function? Replace F703.

Yes No Are T701's secondary Is there short-circuiting of
outputs, +34V, +15V, +10V, T701 primary side periphery, S4101 and Is pin (34) of in Check the OFL1 line, IC1201 connection cable. the "H" state? and their peripheral parts. +5V -9V normal? Q701, Q703 and S4101.

No Yes No

Is T701's primary oscillator Check Q1774 and their Is the Q3603 short-circuiting? waveform normal? peripheral parts.

Yes
Check T701's secondary T1771 T1772 primary side Q1771~Q1773 and load. periphery, Q1771~Q1773. connection cable.

No Is there short-circuiting of Check T1771, T1772,

TROUBLE SHOOTING TABLE

17

Yes
Replace the fluorescent lamp with new one and check again.

LC-15M4E