Pioneer VSX-LX53 Service Manual page 40

1
QQ
VIDEO Troubleshooting
3 7 63 1515 0
If HDMI video signal does not output from HDMI OUT 1 or 2, but HOME MENU OSD can be displayed, go to Step 4-1 or 4-2.
If an analog video signal does not output from analog video output even though Video Convertor function is turnning off,
A
do not follow this trobleshooting, check analog input and output lines on COMPONENT ASSY or COMPOSITE ASSY.
(In this case, type of input video signal and output video signal should be same. eg: IN:Composite OUT: Composite)
The confirmation of peripheral circuits in the flowchart means the checking of the power supply directly at the pin of the IC,
the conduction and resistance value check, and the checking of the solder.
The confirmation of the pattern in the flowchart means the diagnosis including the one for the resistors on the pattern.
Step 1: POWER SUPPLY
Step 1-1: Power Supply Video
IC9812 (Pin 4)
B
Is the
No
voltage of around
5.6 V?
Yes
IC9812 (Pin 5)
Is the
No
voltage of around
5 V?
C
Yes
IC9813 (Pins 1,4)
TE Is the
L 13942296513 No
voltage of around
1.8 V?
Yes
IC9813 (Pin 5)
D
Is the
No
voltage of around
1.2 V?
Yes
IC9815 (Pins 1,4)
Is the
No
voltage of around
1.8 V?
Yes
E
IC9815 (Pin 5)
Is the
No
voltage of around
1 V?
Yes
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2
V+5R6_EV
Check the patterns between
IC9812 and CN9801.
V+5_HD
Check the IC9812 and its
peripheral circuits.
V+1R8_HHH
Check the patterns between
IC9813 and R9832,R9833.
V+1R2_RX
Check the IC9813 and its
peripheral circuits.
V+1R8_HHH
Check the patterns between
IC9815 and R9832,R9833.
V+1_SC
Check the IC9815 and its
peripheral circuits.
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3
8
IC9804 (Pin 2)
Is the
voltage of around
3.3 V?
Yes
IC9804 (Pin 4)
Is the
voltage of around
1.8 V?
Yes
To Step 2-1
Q Q
3 6 7 1 3
Step 1-2: Power Supply XM
IC1816 (Pin 1)
Is the
voltage of around
5.6 V?
Yes
IC1816 (Pin 3)
Is the
voltage of around
4.5 V?
Yes
IC1816 (Pin 5),L1802
Is the
voltage of around
3.3 V?
Yes
To step 2-1
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.
VSX-LX53
3
4
2 9 9 4 2 8
V+3R3_HHH
No
Check the patterns between
IC9804 and R9828,R9829.
V+1R8_SC
No
Check the IC9804 and its
peripheral circuits.
1 5 0 5 8 2 9 9 4
V+5R6_DDD
No
Diagnose the PRIMARY Assy.
RYAC
No
Diagnose the PRIMARY Assy.
No
Replace IC1816.
VSX-33 only
m
co
4
9 9
2 8 9 9