PIONEER VSX-917V-S/KUXJ/CA
Instrukcja Serwisowa

5

6

7

8

C
R452 C414 SY IN VCSDA
A

b-2
Is there a Y signal? Yes C420 SC IN No Diagnose between the BOARD TO BOARD Assy and S. VIDEO Assy.

d-1
Is there a same signal as VCSDA (0 to 3.3 V)? Yes R454 VCSCL No Check the Q451. If Q451 is failure, replace Q451.

b-3
Is there a C signal? Yes No Diagnose between the BOARD TO BOARD Assy and S. VIDEO Assy. Is there a same signal as VCSCL (0 to 3.3 V)? Yes

d-2
No Check the Q451. If Q451 is failure, replace Q451.
B

Note: Check is unnecessary because component input does not convert it.

Step 3-5: VIDEO CLK, DATA
IC701 (Pin 48) LLC1

Step 3-3: Reset
CN318 (Pin 2) XVCRST

e A
Is the voltage "H" (5 V)? No Diagnose between the BOARD TO BOARD Assy and MAIN Assy. Is there a clock (27 MHz)? Yes IC701 (Pins 2 to 9) P8 to P15 No Check the parts and patterns in the path (IC401). If IC401 is failure, replace IC401.
C

X'tal

Yes

f
IC401 (Pin 22) Is there the CLK (28.63636MHz) ? Yes XTAL

c
No Check the X401 or IC402. If X401 or IC402 is failure, replace X401 or IC402.

Is there a data?

No Check the parts and patterns in the path. If IC401 is failure, replace IC401.

Yes

Step 3-6: Video Output
IC701 (Pin 35) DACA
D

Step 3-4: I2C
CN318 (Pin 4) VCSDA

g-1
Is there a composite signal? Yes CN316 (Pin 21) No Check the parts and patterns in the path. If IC701 or R731 or R732 or Q731 is failure, replace it. CVBS OUT

A
Does a signal output in constant period (0 to 5 V) ? Yes CN318 (Pin 3) No Diagnose between the BOARD TO BOARD Assy and MAIN Assy.

a
VCSCL Is there a composite signal? Yes IC701 (Pin 33) DACB No Check the parts and patterns in the path. If Q731 or R733 is failure, replace Q731 or R733. No Diagnose between the BOARD TO BOARD Assy and MAIN Assy.
E

A
Does a clock output in constant period (0 to 5 V) ? Yes

g-2
Is there a Y signal? Yes No Check the parts and patterns in the path. If IC701 or R741 or R742 or Q741 is failure, replace it.
F

D

VSX-917V-K
5 6 7 8

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