Diagnosis; Hdmi Troubleshooting - Pioneer SX-LX70SW Service Manual

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5. DIAGNOSIS

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5.1 HDMI TROUBLESHOOTING

3 7 63 1515 0
A
HDMI Troubleshooting
V+5
• The parts marked like
in "HDMI Assy Check Points".
Common section
Step 1: Connections
CN1001, CN1002 CN1001, CN1002
Is soldering of
B
the connectors
OK?
Yes
Step 2-1: Power supply, CLK
5V
CN1001(Pin 15)
No
Is the voltage
5 V?
C
Yes
1.8 V
No
Is the voltage
1.8 V?
TE
L 13942296513
Yes
3.3 V
No
Is the voltage
3.3 V?
D
Yes
3.3 V
No
Is the voltage
3.3 V?
Yes
5 V
E
No
Is the voltage
5 V?
Yes
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20
1
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in the following chart are located
A1
A2
No
Solder the connectors
correctly.
V+5IN
Check the BTOB, MAIN Assy and
POWER SUPPLY UNIT.
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 IC1002 and
the peripheries of IC1002.
If soldering has not been done
correctly, replace IC1002.
V+3R3_2
Check the soldering of IC1003 and
the peripheries of IC1003.
If soldering has not been done
correctly, replace IC1003.
V+5DH
Check the soldering of Q1006 or
Q1007 and the peripheries of
Q1006 or Q1007.
If soldering has not been done
correctly, replace Q1006 or Q1007.
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8
CN1001 (Pin 19)
Is the voltage
12 V?
Yes
IC1051 (Pin 3)
Is the voltage
5 V?
Yes
X501
Is oscillation
of 15.7 MHz
output?
Yes
Step 2-2: Reset
Q Q
3 6 7
CN1002 (Pin 14)
Is the voltage
"H" (3.3 V)?
Yes
HDMI (HDMI input)
diagnosis : To Step 3-1
u163
SX-LX70SW
3
4
2 9 9 4
UNReg INPUT
V+12UN
No
Check the BTOB, MAIN Assy and
POWER SUPPLY UNIT.
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
done correctly, replace X501 or
IC501.
1 3 1 5 0 5 8 2 9
HDRST
B2
No
Check the parts and patterns in
the path.
No
Check the BTOB, MAIN Assy and
POWER SUPPLY UNIT.
m
co
.
4
2 8
9 9
9 4 2 8 9 9