Pioneer VSX-1018AH-K Service Manual page 54

1
A
B
VCC IN
CN102 (Pin 18)
No
Is there a
C signal?
Yes
VCCY IN
CN102 (Pin 12)
B
No
Is there a
Y signal?
Yes
VCCb IN
CN102 (Pin 10)
No
Is there a
Pb signal?
C
Yes
VCCr IN
CN102 (Pin 8)
No
Is there a
Pr signal?
Yes
Step 4-3: Reset, X'tal
D
XVCRST
IC501 (Pin 3)
No
Is the voltage
"H"(3.3 V)?
Yes
XTAL
IC402 (Pin 7)
E
No
Is there a CLK
(28.63636 MHz)
?
Yes
F
54
1
2
Diagnose the MAIN Assy.
Diagnose the MAIN Assy.
Diagnose the MAIN Assy.
Diagnose the MAIN Assy.
C
Check the parts and patterns in
the path(IC501 - IC401).
No
Replace IC501.
J
Check the X401 or IC402.
No
Replace X401 or IC402.
2
3
Step 4-4: I2C
IC501 (Pin 30)
Does
a signal output in
constant period
(0 - 3.3 V)
?
Yes
IC501 (Pin 29)
Does
a clock output in
constant period
(0 - 3.3 V)
?
Yes
Step 4-5: VIDEO CLK, DATA
IC501 (Pin 4)
Is the voltage
"L"(0 V)?
Yes
IC1259 (Pin 2)
Is there a
CLK?
Yes
R429
Is there a
DATA?
Yes
R428
Is there a
DATA?
Yes
C
VSX-LX51
3
4
VCSDA
C
No
Check the parts and patterns in
the path(IC501 - IC401,601).
No
Replace IC501, IC401 or IC601.
VCSCL
C
No
Check the parts and patterns in
the path(IC501 - IC401,601).
No
Replace IC501, IC401 or IC601.
XVCOE
C
No
Check the parts and patterns in the
path(IC501 - (IC1256 - IC1259)).
No
Replace IC501.
LLC
K
No
Check the parts and patterns in
the path(IC401 - IC1259).
No
Replace IC401.
P22-P25
L1
No
Check the parts and patterns in
the path(IC401 - IC1257).
No
Replace IC401.
P26-P29
L2
No
Check the parts and patterns in
the path(IC401 - IC1257).
No
Replace IC401.
4