Pioneer VSX-84TXSi Service Manual page 58

1
QQ
3 7 63 1515 0
IC701(Pin 38)
A
No
Is there a
Pb signal?
Yes
CN1002(Pin 4)
No
Is there a
Pb signal?
B
Yes
Diagnose the INTERFACE or
COMPONENT&VOL ASSY
IC701(Pin 37)
No
Is there a
Pr signal?
C
Yes
CN1002(Pin 2)
TE
L 13942296513
No
Is there a
Pr signal?
Yes
Diagnose the INTERFACE or
COMPONENT&VOL ASSY
D
Scaler section
Step 5-1: Power supply
Is the voltage
E 3.3V?
Yes
No
Is the voltage
3.3V?
www
F
58
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2
DAC E *Only 480i,576i,480p input
L2
Check the IC701.
No
Replace IC701.
*Only 480i/576i,480p input
Pb OUT
A2
Check the parts and patterns in
the path(Q701 to CN1002).
Check the peripheries of IC751.
No
Replace IC 751.
DAC F *Only 480i,576i,480p input
L2
Check the IC701.
No
Replace IC701.
Pr OUT
*Only 480i,576i,480p input
A2
Check the parts and patterns in
the path(Q701 to CN1002).
Check the peripheries of IC751.
No
Replace IC 751.
3.3V (Scaler)
O1
No
Check the L1302.
No
Replace L1302.
3.3V (Scaler)
O2
Check the L1303.
No
x ao
Replace L1303.
y
. i
VSX-84TXSi
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3
8
Yes
Is the voltage
1.8V?
Yes
Is the voltage
1.8V?
Yes
Is the voltage
1.8V?
Yes
Is the voltage
3.3V?
Yes
Step 5-2: X'tal, Reset
Q Q
3 6 7 1 3
X1301
Is oscillation
of 13.5 MHz
output?
Yes
IC1301(Pin 47)
Is the voltage
"H"(3.3V)?
Yes
IC1301(Pin 46)
Does
a signal output in
constant period
(0 to 3.3 V)
?
Yes
IC1301(Pin 45)
Does
a clock output in
constant period
(0 to 3.3 V)
?
u163
Yes
.
H
3
4
2 9 9 4 2 8
1.8V (Scaler)
O3
No
Check the L1301.
No
Replace L1301.
1.8V (Scaler)
O4
No
Check the L1304.
No
Replace L1304.
1.8V (Scaler)
O5
No
Check the L1305.
No
Replace L1305.
3.3V (SDRAM)
O6
No
Check the L1351.
No
Replace L1351.
1 5 0 5 8 2 9 9 4
X'tal
P1
No
Check the X1301.
No
Replace X1301 or IC1301.
XVCRST
P2
No
Check the parts and patterns in
the path(IC501 to IC1301).
No
Replace IC501.
VCSDA
P2
No
Check the parts and patterns in
the path(IC501 to IC1301).
No
Replace IC501 or IC1301.
VCSCL
P2
No
Check the parts and patterns in
m
the path(IC501 to IC1301).
co No
Replace IC501 or IC1301.
4
9 9
2 8 9 9