Sony KD-55A9F Service Manual page 66

4.5 NO PICTURE: HDMI 4
No Picture
Check HDMIcable
OK
Check other
HDMI input
All Inputs NG
Check Picture by other TV set
which is same model
Target board & other TV
set both NG
Is using HDMI splitter ?
NO
Check Source equipment
by Reference TV set
(For example, RB1)
Reference TV set
NG
Check the settings of
Source equipment,cable
①
Change HDMIcable
NG
Other Input is OK
Other TV set
OK
Check IC1000
Connect Source
equipment directly
YES
Go to
Change B-Board.
And inform the designer of it
Reference TV Set
OK
Check the below point at
Connector side
・Check +5V line CL4063
・Check HPD line CL3810
・Check DDC lines CL4064/CL4065
・Check TMDS lines
+5V line NG
Spec:4.7~5.3V
Check R3837
①
Check IC1000
And inform the designer of it
All lines NG
+5V line OK
and HPD line NG
Spec:2.4~5.3V
DDC lines NG
Check
RB3819,R3829,
R3830
NG
Check
CN3603
NG
TMDS lines NG
Check
RB3815,RB3816,
RB3817,RB3818
NG
66
SYS SET