Sharp XV-Z90E Service Manual page 24

XV-Z90E
XV-Z91E
Check of IC2002 and around I/O
Does POWER LED flicker in red ?
Yes
Is P1701 (9) pin (P CON0) H?
Yes
Is the FAN voltage supplied?
No
Is 13 V outputted to P1701 (17)
(18) (19) pins?
No
Go to "Checking of Power Unit"
No
No
Is it in the stand-by due to
an error?
Yes
Turn on the power again.
FAN_ERROR is being detected.
Yes
Check around Q1701 and around
IC2002 (21) pin.
Yes
Check IC1708, IC1710 and
around these ICs.
No
Is Bu+6.5V outputted to P1701
(12) (13) (14) pins?
Is BU 5 V outputted from
IC1701?
Is BU 3.3 V outputted from
IC1702?
Is BU 2.5 V outputted from
IC1703?
Check IC8001 and the circuit
around the IC.
24
No
This is the failure of
IC2002.
Yes
No
Yes
No
Yes
No
Yes
Check IC1701 and its
periphery."
Check IC1702 and its
periphery.
Check IC1703 and its
periphery.