Sony GN1G - Page 35

35
TROUBLE SHOOTING
KDL-50W800C, 805C, 807C, 809C/KDL-55W800C, 805C
START
Check Vdd
C9234
Is voltage >5V?
Change IC9026
Yes
No
END
Yes
Check P_ON_#2
P-on ucom #pin14
Is the voltage >3.0V?
Change IC9027
No
Yes
Check ORESETB
P-on ucom #pin12
Is the voltage >3.0V?
Change IC9027
No
Yes
Change IC9027
No
END
Ucom IC9027 working OK
Yes
Check X_SYSTEM_RST
P-on ucom #pin16
Is the voltage >3.0V?
Change IC9027
No
Yes
Check BL_ON
P-on ucom #pin18
Is the voltage >3.0V?
A
From previous page
3-2-3. NO Power (U-Com Failure)
a) DC_OFF_DET check