Pioneer VSX-84TXSi Service Manual page 55

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Video converter section
Step 4-1: Power supply
Is the voltage
5V?
Yes
Is the voltage
3.3V?
Yes
Is the voltage
3.3V?
Yes
Is the voltage
3.3V?
TE
L 13942296513
Yes
Is the voltage
2.5V?
Yes
Is the voltage
2.5V?
Yes
Is the voltage
1.8V?
Yes
www
Is the voltage
1.8V?
.
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5V(VIDEO FILTER)
V+5A
No
Check the patterns inthe path
(R1017).
No
Replace R1017.
3.3V(VIDEO DEC)
V+3DE
No
Check the patterns inthe path
(L601).
No
Replace L601.
3.3V(VIDEO DEC)
K1
No
Check the patterns inthe path
(L604).
No
Replace L604.
3.3V(VIDEO ENC)
K2
No
Check the patterns inthe path
(L703).
No
Replace L703.
2.5V(VIDEO ENC)
K3
No
Check the patterns inthe path
(L701).
No
Replace L701.
2.5V(VIDEO ENC)
K4
No
Check the patterns inthe path
(L702).
No
Replace L702.
1.8V(VIDEO DEC)
K5
No
Check the patterns inthe path
(L602).
No
Replace L602.
1.8V(VIDEO DEC)
K6
No
Check the patterns inthe path
x ao u163
(L603).
y
No
i
Replace L603.
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Yes
Step 4-2: VIDEO INPUT
CN1002(Pin 24)
Is there a
composite
signal?
Yes
CN1002(Pin 20)
Is there a
Y signal?
Yes
CN1002(Pin 18)
Is there a
C signal?
Yes
CN1002(Pin 12)
Q Q
3 6 7 1 3 1 5
Is there a
Y signal?
Yes
CN1002(Pin 10)
Is there a
Pb signal?
Yes
CN1002(Pin 8)
Is there a
Pr signal?
Yes
Step 4-3: Reset
IC601(Pin 78)
s the voltage
co
"H"(3.3V)?
.
Yes
F
VSX-84TXSi
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CVBS IN
A2
No
Diagnose the INTERFACE or
COMPOSITE_V ASSY
SY IN
A2
No
Diagnose the INTERFACE or
S-VIDEO ASSY
SC IN
A2
No
Diagnose the INTERFACE or
S-VIDEO ASSY
Y IN
A2
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No
Diagnose the INTERFACE or
COMPONENT&VOL ASSY
Pb IN
A2
No
Diagnose the INTERFACE or
COMPONENT&VOL ASSY
Pr IN
A2
No
Diagnose the INTERFACE or
COMPONENT&VOL ASSY
XVCRST(DEC)
L1
m
No
Check the parts and patterns in
the path(IC501 to IC601).
No
Replace IC501.
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A
B
C
9 9
D
E
F
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