26
VSX-819H-K
1
2
3
4
A
B
C
D
E
F
1
2
3
4
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 VSX-819H-K - AV Receiver - Gloss
Page 19: ...19 VSX 819H K 5 6 7 8 5 6 7 8 A B C D E F 4 4 U COM BLOCK DIAGRAM P C B SUB ASSY FRONT C ...
Page 49: ...49 VSX 819H K 5 6 7 8 5 6 7 8 A B C D E F ...
Page 55: ...55 VSX 819H K 5 6 7 8 5 6 7 8 A B C D E F ...
Page 61: ...61 VSX 819H 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 C C C ...
Page 71: ...71 VSX 819H K 5 6 7 8 5 6 7 8 A B C D E F P 2 2 CN805 R 116 ...
Page 73: ...73 VSX 819H K 5 6 7 8 5 6 7 8 A B C D E F R CP105 A CP705 C ...
Page 77: ...77 VSX 819H 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 83: ...83 VSX 819H K 5 6 7 8 5 6 7 8 A B C D E F J 01 SIDE A SIDE B ...
Page 87: ...87 VSX 819H K 5 6 7 8 5 6 7 8 A B C D E F L SIDE A ...
Page 89: ...89 VSX 819H K 5 6 7 8 5 6 7 8 A B C D E F L SIDE B ...
Page 95: ...95 VSX 819H K 5 6 7 8 5 6 7 8 A B C D E F P N SIDE B ...