No Power (Dc/Dc Converter Check) - Sony KDL-65W850C Service Manual

3-2-3. NO Power (DC/DC Converter Check)

START
No
Check C9216 Voltage.
Is the voltage 3.3V?
Yes
No
Check C9224 Voltage.
Is the voltage 1.5V?
Yes
No
Check C9188 Voltage.
Is the voltage 5V?
Yes
No
Check C9203 Voltage.
Is the voltage 1V?
Yes
KDL-65W850C, 855C, 857C, 75W850C, 855C
3.3V DDCON check.
(Change B* Board)
1.5V DDCON check.
(Change B* Board)
5.0V DDCON check.
(Change B* Board)
1.0V DDCON check
(Change B* Board)
No
Check C9207 is
it 1.05V?
Yes
Check C9230 is No
it 1.8V?
Yes
Check 3.3V_MAIN
No
C9005 Voltage.
Is the voltage 3.3V?
Yes
END
DDCON/LDO working normal
TROUBLE SHOOTING
1.05V LDO check
(Change B* Board)
1.8V DDCON check
(Change B* Board)
3.3V_MAIN check
(Change B* Board)
Size B* Board G* Board
65"
BMX GL1SB
75"
BMX GL1C
34