Pioneer VSX-94TXH Service Manual page 46

1
HDMI Troubleshooting
QQ
3 7 63 1515 0
V+5
• The parts marked like
in "HDMI & DLNA Assy Check Points".
A
Common section
Step 1: Connections
CN1001, CN1002 CN1001, CN1002
Is soldering of
the connectors
OK?
Yes
B
Step 2-1: Power supply, CLK
UNReg INPUT
CN1001(Pin 4)
No
Is the voltage
11 V?
Yes
1.8 V
R1031
C
No
Is the voltage
1.8 V?
TE Yes
L 13942296513
R1008 3.3 V
No
Is the voltage
3.3 V?
D
Yes
R1009 3.3 V
No
Is the voltage
3.3 V?
Yes
R1073 5 V
E
No
Is the voltage
5 V?
Yes
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in the following chart are located
A1
A2
No
Solder the connectors
correctly.
V+5IN
Check the INTERFACE Assy.
V+1R8H
Check the soldering of IC1001 and
the peripheries of IC1001.
If soldering has not been done
correctly, replace IC1001.
V+3R3_1
Check the soldering of IC1001 and
the peripheries of IC1001.
If soldering has not been done
correctly, replace IC1001.
V+3R3_2
Check the soldering of IC1001 and
the peripheries of IC1001.
If soldering has not been done
correctly, replace IC1001.
V+5DH
Check the soldering of IC1071 and
the peripheries of IC1071.
If soldering has not been done
correctly, replace IC1071.
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8
R1072
Is the voltage
5 V?
Yes
CN1001(Pin 1)
Is the voltage
11 V?
Yes
IC1051(Pin 3)
Is the voltage
5 V?
Yes
X501
Is oscillation
of 15.7 MHz
Q Q
output?
3 6 7
Yes
Step 2-2: Reset
CN1001(Pin 23)
Is the voltage
"H" (3.3 V)?
Yes
HDMI (HDMI input)
diagnosis : To Step 3-1
Video converter (Analog input)
diagnosis : To Step 4-1
u163
VSX-94TXH
3
4
2 9 9 4
5 V
V+5AH
No
Check the soldering of IC1071 and
the peripheries of IC1071.
If soldering has not been done
correctly, replace IC1071.
UNReg INPUT
V+12UN
No
Check the INTERFACE Assy.
5 V
V+5HD
No
Check the soldering of IC1051 and
the peripheries of IC1051.
If soldering has not been done
correctly, replace IC1051.
X'TAL (microcomputer)
B1
No
Check the soldering of X501 or
IC501. If soldering has not been
1 3 1 5 0 5 8 2 9
done correctly, replace X501 or
IC501.
HDRST
B2
No
Check the parts and patterns in
the path.
No
Check the INTERFACE Assy
or DIGITAL MOTHER Assy.
Scaler diagnosis :
To Step 5-1
Scaler diagnosis :
To Step 5-1
m
co
.
4
2 8
9 9
9 4 2 8 9 9