25
SX-319V-K
5
6
7
8
5
6
7
8
A
B
C
D
E
F
C
N
1002 (Pin 10)
Is the voltage
0 to 3.3
V
?
N
o
SUB_O
N
Diagnose the MAI
N
Assy.
Diagnose the MAI
N
Assy.
Diagnose the MAI
N
Assy.
Diagnose the MAI
N
Assy.
Yes
C
N
1002 (Pins 1, 2)
Is the voltage
3.3
V
?
Is the voltage
3.3
V
?
Is the voltage
3.3
V
?
Is the voltage
5
V
?
N
o
SUB MICOM 3.3
V
Q1204 (collector)
N
o
SUB MICOM 3.3
V
Yes
Yes
C
N
1001 (Pin 3)
N
o
HDMI_5
V
Yes
C
N
1001 (Pins 1, 2)
N
o
HDMI_3.3
V
Yes
Is Q1204
base voltage
2.6
V
?
N
o
Yes
To Step 3
Is the voltage
3.3
V
?
Is the voltage
1.
8
V
?
Is the voltage
3.3
V
?
Is the voltage
1.2
V
?
replace
IC1005
replace
IC1004
IC1005 (Pin 3)
N
o
HDMI 3.3
V
Yes
IC1005 (Pin 2)
N
o
HDMI 1.
8V
Yes
Check the parts and patterns in
the path.
Check the parts and patterns in
the path.
Is IC1005
abnormally
hot?
Is IC1004
abnormally
hot?
N
o
Yes
IC1004 (Pin 3)
N
o
HDMI 3.3
V
HDMI 1.2
V
Yes
The output and G
N
D may be short-circuited.
Check the path between them.
Check the parts and
patterns in the path.
Replace Q1204,
IC1003, etc.
Check the parts and
patterns in the path
Q1405, Q1204, etc.
The output and G
N
D may be short-circuited.
Check the path between them.
IC1004 (Pin 2)
N
o
Yes
N
o
Yes
Step 2: Power supply
replace Q1405
N
o
Yes
Is Q1405
collector voltage
0
V
? (base is 3.3
V
)
Summary of Contents for SX-319V-K
Page 49: ...49 SX 319V K 5 6 7 8 5 6 7 8 A B C D E F ...
Page 55: ...55 SX 319V K 5 6 7 8 5 6 7 8 A B C D E F J CN401 M CP107 A FL FL FL SL SL SL SW C C C ...
Page 67: ...67 SX 319V K 5 6 7 8 5 6 7 8 A B C D E F B A SIDE B B P C B SUB ASSY P T ...
Page 73: ...73 SX 319V K 5 6 7 8 5 6 7 8 A B C D E F J 01 SIDE A SIDE B ...
Page 77: ...77 SX 319V K 5 6 7 8 5 6 7 8 A B C D E F L SIDE A ...
Page 79: ...79 SX 319V K 5 6 7 8 5 6 7 8 A B C D E F L SIDE B ...
Page 85: ...85 SX 319V K 5 6 7 8 5 6 7 8 A B C D E F P N SIDE B ...