Mitsubishi E55LCD Service Manual page 46

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Is 5V voltage provided to pins 38 and 39 of J301
in MAIN board?
NG
OK
Is a PCLK being outputted under the condition
that pin2 of J301in main BD?
NG
OK
Check the DE pulse is output on J301 pin4?
NG
OK
Check the PVD signal is ouput on J301 pin5 .
NG
OK
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Is 5V voltage provided to
pin 38 and 39 of J301.
NG
OK
Failure point
J301 cable pulled out or
disconnected.
6-4
Failure point
Check Q301and IC301.
Failure point
1) IC401 failure.
2) Printed wire broke between
IC401 and J301pin2.
3) R436;C343or R306 failure.
Failure point
1) U3 failure.
2) Printed wire broke between
IC401 and J301 pin4.
3) R439 or C344 failure.
Failure point
1) U3 failure.
2) Printed wire broke between
IC401 and J301 pin5.
3) R438, C345 failure.