1
2
3
4
C
D
F
A
B
E
48
1
2
3
4
VSX-84TXSi
Step 2-1: Power supply, CLK
Is soldering of
the connectors
OK?
Solder the connectors
correctly.
No
Yes
CN1001(Pin 4)
R1028
Is the voltage
5 V?
Step 2-2: Reset
No
5 V INPUT
1.8 V
Yes
Is the voltage
1.8 V?
No
Yes
V+5IN
A1
A2
IC1051(Pin 3)
Is the voltage
5 V?
No
5 V
Yes
V+5HD
X501
Is oscillation
of 15.7 MHz
output?
No
X'TAL (microcomputer)
Yes
B1
CN1001(Pin 23)
IIs the voltage
"H" (3.3 V)?
No
HDRST
Check the parts and patterns in
the path.
Yes
B2
IC1001(OUT)
2.5 V
Is the voltage
2.5 V?
No
Yes
V+2R5
3.3 V?
Yes
CN1001(Pin 1)
UNReg INPUT
Is the voltage
12 V?
No
Yes
V+5UN
V+1R8
HDMI (HDMI input)
diagnosis : To Step 3-1
Scaler diagnosis :
To Step 5-1
Video converter (Analog input)
diagnosis : To Step 4-1
Scaler diagnosis :
To Step 5-1
CN1001, CN1002
Check the INTERFACE Assy
or DC/DC Assy.
Check the INTERFACE Assy
or DC/DC Assy.
Check the INTERFACE Assy
or DIGITAL MOTHER Assy.
• The parts marked like in the following chart are located
in "HDMI & 1394 Assy Check Points".
Step 1: Connections
CN1001, CN1002
Common section
HDMI Troubleshooting
V+5
Check the soldering of IC1004 and
the peripheries of IC1004.
If soldering has not been done
correctly, replace IC1004.
Check the soldering of IC1001.
If soldering has not been done
correctly, replace IC1001.
Check the soldering of IC1051.
If soldering has not been done
correctly, replace IC1051.
Check the soldering of IC1002.
If soldering has not been done
correctly, replace IC1002.
Check the soldering of IC1003.
If soldering has not been done
correctly, replace IC1003.
Check the soldering of X501 or
IC501. If soldering has not been
done correctly, replace X501 or
IC501.
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