Pioneer VSX-817-K Service Manual page 115

5
QQ
3 7 63 1515 0
C
C414
Is there a
Y signal?
Yes
C420
Is there a
C signal?
Yes
Step 3-3: Reset
CN318 (Pin 2)
Is the voltage
"H" (5 V)?
Yes
X'tal
IC401 (Pin 22)
TE
L 13942296513
Is
there the CLK
(28.63636MHz)
?
Yes
Step 3-4: I2C
CN318 (Pin 4)
Does
a signal output in
constant period
(0 to 5 V)
?
Yes
CN318 (Pin 3)
Does
a clock output in
constant period
(0 to 5 V)
?
Yes
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SY IN
b-2
No
Diagnose between the BOARD
TO BOARD Assy and S. VIDEO
Assy.
SC IN
b-3
No
Diagnose between the BOARD
TO BOARD Assy and S. VIDEO
Assy.
Note:
Check is unnecessary because component
input does not convert it.
XVCRST
A
No
Diagnose between the BOARD
TO BOARD Assy and MAIN
Assy.
XTAL
c
No Check the X401 or IC402.
If X401 or IC402 is failure,
replace X401 or IC402.
VCSDA
A
Diagnose between the BOARD
No
TO BOARD Assy and MAIN
Assy.
VCSCL
A
Diagnose between the BOARD
No
TO BOARD Assy and MAIN
Assy.
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7
2 9
8
R452
Is there
a same signal as
VCSDA (0 to
3.3 V)?
Yes
R454
Is there
a same signal as
VCSCL (0 to
3.3 V)?
Yes
Step 3-5: VIDEO CLK, DATA
IC701 (Pin 48)
Is there a clock
(27 MHz)?
Yes
IC701 (Pins 2 to 9)
Q Q
3 6 7 1 3 1 5
Is there a data?
Yes
Step 3-6: Video Output
IC701 (Pin 35)
Is there a
composite
signal?
Yes
CN316 (Pin 21)
Is there a
composite
signal?
Yes
IC701 (Pin 33)
Is there a
Y signal?
co
Yes
.
D
VSX-917V-K
7
8
9 4 2 8
VCSDA
d-1
No
Check the Q451.
If Q451 is failure, replace Q451.
VCSCL
d-2
No
Check the Q451.
If Q451 is failure, replace Q451.
LLC1
e
Check the parts and patterns in
No
the path (IC401).
If IC401 is failure, replace IC401.
P8 to P15
f
0 5 8 2 9 9 4 2 8
Check the parts and patterns in
No
the path.
If IC401 is failure, replace IC401.
DACA
g-1
Check the parts and patterns in
No
the path.
If IC701 or R731 or R732 or Q731
is failure, replace it.
CVBS OUT
a
Check the parts and patterns in
No
the path.
If Q731 or R733 is failure,
replace Q731 or R733.
DACB
g-2
Check the parts and patterns in
No
m
the path.
If IC701 or R741 or R742 or Q741
is failure, replace it.
9 9
A
B
C
9 9
D
E
F
115
8