Sharp XG-MB70X Serviceanleitung Seite 34

XG-MB70X
Checking the power supply system
Is 13V output to pins (9) and (11) of
P1707?
YES
Is 6V output to pins (1) and (3) of P1707?
YES
Is the connector of P1708 fully inserted?
Is the voltage of 6V applied to both ends?
YES
Is B+5VAT output from IC1776?
YES
Is BU+3.3V output from IC1708?
YES
Is BU+2.5V output from IC1733?
YES
Go to "Checking the peripheral circuits of
the microprocessor".
NO
Go to "Checking the power unit".
NO
Go to "Checking the power unit".
NO
Replace the thermal fuse.
NO
Check IC1776 and peripheral circuits.
NO
Check IC1708 and peripheral circuits.
NO
Check IC1733 and peripheral circuits.
34