Read Sharp LC-15E1E (serv.man3) Service Manual online
LC-13E1E
LC-15E1E
LC-15E1E
15
TROUBLE SHOOTING TABLE
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Check all the settings microprocessor’s adjust process menu.
Do F1 and F2 function?
Are T3701’s secondary
outputs +31V, +22V, +9V,
+5V and -8V normal?
Remove F1 and F2 and
check the load side.
Is there short-circuiting?
Is there short-circuiting of
T3701 primary side periphery,
Q3700, Q3701 and S4701?
Replace F1 and F2.
Check S4701 and
connection cable.
Is T3701’s primary oscillator
waveform normal?
Check T3701’s secondary
load.
Yes
Yes
No
No
No
No
Yes
Check J3702 periphery and
connection cable.
Yes
Back light lamp failure to light up
Replace F6500 and F6501.
Is the pin (34) of IC1201 in
the "H" state?
Is the primary side of
T6500~T6503 periphery
short-circuiting?
Replace the back light lamp
with new one and check
again.
Yes
Yes
No
No
Yes
Check the OFL1 line, IC1201
and their peripheral parts.
Check T6500~T6503,
Q6500~Q6505 and
connection cable.
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