Pioneer VSX-917V-K Service Manual page 115

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