Ddc: +5.0V_Ddc_Out Check - Sony KD-43XE7 Series Service Manual

3.11 No Power DDCON/LDO

DDC: +5.0V_DDC_OUT check

LD-Board model
Check input
F6004
Is voltage >19.0V?
START
Check fuse
no
F6004
Is fuse OK?
G-Board model
yes yes
Check input
voltage F6004
Is voltage >12.0V?
no
yes
yes
Check EN signal
no
R455 voltage
Is voltage >2.5V?
yes
Check Vcc
no
C428 voltage
Is voltage >5.3V?
yes
END
Change F6004
voltage
no
1.2 No Power U-Com Failure
Change IC402
G-Board/LD-Board
KC 55"/65"=G-Board model (PSU)
KC 43"/49"=LD-Board model (ADP)
98