37
SC-LX81
5
6
7
8
5
6
7
8
A
B
C
D
E
F
Step 2-1: Power supply, CLK
Is soldering
and connections of
the connectors
OK?
Solder the connectors
correctly, insert the
connectors securely.
N
o
Yes
C
N
1001(Pin 4)
R1057
Is the voltage
15.5
V
?
Step 2-2: Reset
N
o
U
N
Reg I
N
PUT
6
V
Yes
Is the voltage
6
V
?
N
o
Yes
V+12HDMI
All Connectors
L1702
Is the voltage
1.5
V
?
N
o
1.5
V
Yes
V+1R5D
R1905
Is the voltage
1.25
V
?
N
o
1.25
V
Yes
A1
C
N
1003(Pin 4)
Is the voltage
"H" (3.3
V
)?
N
o
HDRST
Check the parts and patterns in
the path.
Diagnosis the I
N
TERFACE Assy
or D-MOTHER Assy.
Yes
N
o
B2
R10
8
2
5
V
Is the voltage
5
V
?
N
o
Yes
V+5DHD
R1073
5
V
Is the voltage
5
V
?
N
o
Yes
V+5AHD
L1901
2.5
V
Is the voltage
2.5
V
?
N
o
Yes
V+2R5DDR_EM
V+6HD
HDMI (HDMI input)
diagnosis : To Step 3-1
Scaler diagnosis :
To Step 5-1
V
ideo converter (Analog input)
diagnosis : To Step 4-1
Scaler diagnosis :
To Step 5-1
GUI(EMMA) diagnosis :
To Step 6-1
Scaler diagnosis :
To Step 5-1
C
N
1001 - C
N
1003,
C
N
201, C
N
1701, C
N
601
Diagnosis the I
N
TERFACE Assy.
• The parts marked like in the following chart are located
in "HDMI/
N
ET
W
ORK Assy Check Points".
Step 1: Connections
Common section
[3] HDMI Troubleshooting
A2
Check the soldering of IC1051 and
the peripheries of IC1051.
If soldering has not been done
correctly, replace IC1051.
Check the soldering of IC1702 and
the peripheries of IC1702.
If soldering has not been done
correctly, replace IC1702.
Check the soldering of IC10
8
2 and
the peripheries of IC10
8
2.
If soldering has not been done
correctly, replace IC10
8
2.
Check the soldering of IC1071 and
the peripheries of IC1071.
If soldering has not been done
correctly, replace IC1071.
R1029
3.3
V
Is the voltage
3.3
V
?
N
o
Yes
V+3R3HD
R1030
1.
8
V
Is the voltage
1.
8
V
?
N
o
Yes
V+1R
8
HD
Check the soldering of IC1021 and
the peripheries of IC1021.
If soldering has not been done
correctly, replace IC1021.
Check the soldering of IC1021 and
the peripheries of IC1021.
If soldering has not been done
correctly, replace IC1021.
Check the soldering of IC1902 and
the peripheries of IC1902.
If soldering has not been done
correctly, replace IC1902.
Check the soldering of IC1903 and
the peripheries of IC1903.
If soldering has not been done
correctly, replace IC1903.
X501
Is oscillation
of 15.7 MHz
?
N
o
X'TAL (microcomputer)
Yes
B1
Check the soldering of X501 or
IC501. If soldering has not been
done correctly, replace X501 or
IC501.