Read Sharp XG-MB70X (serv.man13) Service Manual online
34
XG-MB70X
Checking the power supply system
Is 13V output to pins (9) and (11) of
P1707?
P1707?
Is 6V output to pins (1) and (3) of P1707?
Go to "Checking the power unit".
Go to "Checking the power unit".
Is the connector of P1708 fully inserted?
Is the voltage of 6V applied to both ends?
Is the voltage of 6V applied to both ends?
Replace the thermal fuse.
Is B+5VAT output from IC1776?
Check IC1776 and peripheral circuits.
Is BU+3.3V output from IC1708?
Check IC1708 and peripheral circuits.
Is BU+2.5V output from IC1733?
Check IC1733 and peripheral circuits.
Go to "Checking the peripheral circuits of
the microprocessor".
the microprocessor".
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
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