Pioneer VSX-LX53 Service Manual page 44

1
QQ
3 7 63 1515 0
Step 4-4: Composite IN-HDMI OUT (DVC:ON)
A
CN1502 (Pin 18)
Is there No
a signal?
Yes
IC1102 (Pin 36)
B
No Check the patterns and circuits
Is there
a signal?
Yes
IC1102
(Pins 2,5-8,20,59-64)
Are there No
signals?
(Pin 20:
C
27 MHz)
Yes
R1101,R1107,R1109
TE
L 13942296513
No
Are there
signals?
Yes
IC1202,IC1203 (input Pin)
D
Are there No
signals?
(IC1203 input Pin: 27 MHz)
Yes
R1202,R1208,R1212
Are there No
signals?
(R1212: 27 MHz)
Yes
E
IC101 (Through hole)
No
Are there
signals?
Yes
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F
44
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2
A_VVYIN
Diagnose the COMPONENT Assy
A_VVYIN
between
IC1502 (Pin 18) and IC1102 (Pin 36).
Q16 - Q23,RXOCLK,RXHSYNC,
RXVSYNC,RXDE
Check the IC1102 and its
peripheral circuits
(e.g. VSSDA/VSSCL).
Q16 - Q23
Replace IC1102.
Q16 - Q23,RXOCLK
Check the patterns between
IC1202,IC1203 and IC1102.
VID0 - VID7,VICLK
Check the IC1202,IC1203 and its
peripheral circuits.
VID0 - VID7,VICLK
Check the patterns between
R1202,R1208,R1212 and IC101.
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y
. i
2
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3
8
R106 - R110,R113
Are there
signals?
Yes
IC1204 (Through hole)
Are there
signals?
Yes
R1242 - R1245,R1248,
R1249,R1304
Are there
signals?
Yes
IC1208 - IC1210,IC1218
(input Pin)
Q Q
3 6 7 1 3
Are there
signals?
Yes
IC1208 - IC1210,IC1218
(output Pin)
Are there
signals?
Yes
L
u163
.
VSX-LX53
3
4
2 9 9 4 2 8
N
VOD0 - VOD7,VOCLK
No
Check the IC101 and its
peripheral circuits.
VOD0 - VOD7,VOCLK
No
Check the patterns between
R106,R107,R108,R109,R110,
R113 and IC1204.
No
Check the patterns between
R1242,R1243,R1244,R1245,
R1248,R1249,R1304 and IC1204.
1 5 0 5 8 2 9 9 4
No
Check the R1242 - R1245,R1248,
R1249,R1304 and its peripheral
patterns.
D**,TXICLK
No
Check the IC1208 - IC1210,
IC1218 and its peripheral circuits.
m
co
4
9 9
2 8 9 9