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SX-LX70SW
20
1
2
3
4
1
2
3
4
C
D
F
A
B
E
5. DIAGNOSIS
5.1 HDMI TROUBLESHOOTING
Step 2-1: Power supply, CLK
Is soldering of
the connectors
OK?
Solder the connectors
correctly.
N
o
Yes
C
N
1001(Pin 15)
Is the voltage
5
V
?
Step 2-2: Reset
N
o
5
V
1.
8
V
Yes
Is the voltage
1.
8
V
?
N
o
Yes
V+5IN
A1
A2
IC1051 (Pin 3)
Is the voltage
5
V
?
N
o
5
V
Yes
V+5HD
X501
Is oscillation
of 15.7 MHz
o
u
tp
u
t?
N
o
X'TAL (microcomp
u
ter)
Yes
B1
C
N
1002 (Pin 14)
Is the voltage
"H" (3.3
V
)?
N
o
HDRST
Check the parts and patterns in
the path.
Yes
N
o
B2
3.3
V
Is the voltage
3.3
V
?
N
o
Yes
V+3R3_1
3.3
V
Is the voltage
3.3
V
?
N
o
Yes
V+3R3_2
C
N
1001 (Pin 19)
U
N
Reg I
N
PUT
Is the voltage
12
V
?
N
o
Yes
V+12UN
V+1R8H
HDMI (HDMI inp
u
t)
diagnosis : To Step 3-1
C
N
1001, C
N
1002
Check the BTOB, MAI
N
Assy and
PO
W
ER SUPPLY U
N
IT.
• The parts marked like in the following chart are located
in "HDMI Assy Check Points".
Step 1: Connections
C
N
1001, C
N
1002
Common section
HDMI Troubleshooting
V+5
Check the soldering of IC1001 and
the peripheries of IC1001.
If soldering has not been done
correctly, replace IC1001.
Check the soldering of IC1051 and
the peripheries of IC1051.
If soldering has not been done
correctly, replace IC1051.
Check the soldering of IC1002 and
the peripheries of IC1002.
If soldering has not been done
correctly, replace IC1002.
Check the soldering of IC1003 and
the peripheries of IC1003.
If soldering has not been done
correctly, replace IC1003.
5
V
Is the voltage
5
V
?
N
o
Yes
V+5DH
Check the soldering of Q1006 or
Q1007 and the peripheries of
Q1006 or Q1007.
If soldering has not been done
correctly, replace Q1006 or Q1007.
Check the soldering of X501 or
IC501. If soldering has not been
done correctly, replace X501 or
IC501.
Check the BTOB, MAI
N
Assy and
PO
W
ER SUPPLY U
N
IT.
Check the BTOB, MAI
N
Assy and
PO
W
ER SUPPLY U
N
IT.
Summary of Contents for AS-LX70
Page 3: ...SX LX70SW 3 5 6 7 8 5 6 7 8 C D F A B E ...
Page 15: ...SX LX70SW 15 5 6 7 8 5 6 7 8 C D F A B E ...
Page 68: ...SX LX70SW 68 1 2 3 4 1 2 3 4 C D F A B E 9 2 PACKING AS LX70 x 2 Refer to 9 6 REMOTE CONTROL ...
Page 74: ...SX LX70SW 74 1 2 3 4 1 2 3 4 C D F A B E 9 5 DISPLAY UNIT H G I NON CONTACT SIDE CONTACT SIDE ...
Page 76: ...SX LX70SW 76 1 2 3 4 1 2 3 4 C D F A B E 9 6 REMOTE CONTROL ...
Page 97: ...SX LX70SW 97 5 6 7 8 5 6 7 8 C D F A B E ...
Page 106: ...SX LX70SW 106 1 2 3 4 1 2 3 4 C D F A B E 10 15 POWER SUPPLY UNIT J ...
Page 108: ...SX LX70SW 108 1 2 3 4 1 2 3 4 C D F A B E ...
Page 130: ...SX LX70SW 130 1 2 3 4 1 2 3 4 C D F A B E CN3 CN2 J J POWER SUPPLY ASSY SIDE B SIDE B J ...