Pioneer VSX-LX53 Service Manual page 47

5
QQ
3 7 63 1515 0
F
R1564 (hot side)
Is there
a signal?
Yes
Q1504 (Emitter)
Is there
a signal?
Yes
CN1502 (Pin 16)
Is there
a signal?
To Step 4-8
Step 4-8: Component IN (at 480i) - Component OUT (DVC ON)
TE
L 13942296513
CN1502 (Pins 2,4,6)
Are there
signals?
Yes
IC1102 (Pins 47-50)
Are there
signals?
Yes
IC1102
(Pins 2,5-8,20,59-64)
Are there
signals?
Yes
R1101,R1107,R1109
www
Are there
signals?
.
Yes
5
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O
A_VSYOUT_EM
No
Check the patterns between
R1564 and IC101.
A_VSYOUT
No
Check the circuits between
Q1504 and R1564.
A_VSYOUT
No
Check the patterns between
CN1502 and Q1504.
A_VCYIN,A_VCRIN,A_VCBIN
No
Diagnose the COMPONENT Assy.
SG_A,SG_B,SG_C
No
Check the patterns and circuits
between CN1502 (Pins 2,4,6) and
IC1102 (Pins 47-50).
Q16 - Q23,RXOCLK,RXHSYNC,
RXVSYNC,RXDE
No
Check the IC1102 and its
peripheral circuits
(e.g. VSSDA/VSSCL).
(Pin 20: 27 MHz)
Q16 - Q23
No
x ao
y
Replace IC1102.
i
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6
8
IC1202,IC1203 (input Pin)
Are there
signals?
R1202,R1208,R1212
Are there
signals?
IC101 (Through hole)
Are there
signals?
R1568,R1570,R1572
(hot side)
Q Q
3 6 7 1 3
Are there
signals?
Q1506 - Q1508
(Emitter side)
Are there
signals?
To Step 4-9
u163
.
VSX-LX53
6
7
2 9 9 4 2 8
Q16 - Q23,RXOCLK
No
Check the patterns between
IC1202,IC1203 and IC1102.
(IC1203 input Pin = 27 MHz)
Yes
VID0 - VID7,VICLK
No
Check the IC1202,IC1203 and its
peripheral circuits.
(R1212: 27 MHz)
Yes
VID0 - VID7,VICLK
No
Check the patterns between
R1202,R1208,R1212 and IC101.
Yes
P
A_VCYOUT_EM,A_VCBOUT_EM,
A_VCROUT_EM
1 5 0 5 8 2 9 9 4
No
Check the patterns between
R1568,R1570,R1572 and IC101.
Yes
A_VCYOUT,A_VCBOUT,
A_VCROUT
No
Check the circuits between
Q1506 and R1568,Q1507 and
R1570, Q1508 and R1572 .
Yes
m
co
7
8
9 9
A
B
C
2 8 9 9
D
E
F
47
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