31
VSX-819H-K
5
6
7
8
5
6
7
8
A
B
C
D
E
F
iPod Troubleshooting
Step 0: Preliminary confirmation
Step 1: Power supply
Confirm the following items before checking.
To STEP 1
To STEP 2
Do screws of
COAX jack securely
tighten ?
Tighten screws securely.
Check the patterns in
the path.
N
o
Yes
To STEP 1
Yes
Yes
Is there any
loose connection
CP105 of MAI
N
Assy?
Check the MAI
N
Assy.
N
o
C
N8
07 (pins 1, 3)
REG2 (pin 3)
Is
the voltage
5
V
?
N
o
Yes
Is REG1
abnormally
hot?
N
o
N
o
Yes
Is REG2
abnormally
hot?
N
o
N
o
5
V
input
(to chassis)
3.3
V
output (to chassis)
5
V
input
Replace REG2.
The output and G
N
D may be
short-circuited. Check the path
between them.
Yes
Yes
Is
the voltage of
5
V
input?
N
o
REG2 (pin 2)
Yes
Is
the voltage
3.3
V
output?
Check the patterns in
the path.
REG1 (pin 3)
Is
the voltage
5
V
?
N
o
Yes
1.
8
V
output
REG1 (pin 2)
Is
the voltage
1.
8
V
output?
Replace REG1.
The output and G
N
D may be
short-circuited. Check the path
between them.
Replace IC
8
05.
Yes
Yes
Yes
Is pin 4
(E
N
) of IC
8
05
Low?
Is
the voltage
5
V
input?
N
o
Yes
Is pin 3
(OC) of IC
8
05
high?
N
o
N
o
Check the parts and
patterns in the path
(C
N8
01).
IC
8
05 (pin 1)
USB Bus power
Is
the voltage
5
V
output?
Check the parts and patterns
in the path of C
N8
01.
N
o
IC
8
05 (pin 5)
5
V
input
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 ...