Pioneer VSX-94TXH Service Manual page 50

1
QQ
C
3 7 63 1515 0
A
IC1252 (Pin 7)
Is there
a same signal as G7
(0 - 4.4 V)?
Yes
IC1252 (Pin 4)
Is there
B
a same signal as G8
(0 - 4.4 V)?
Yes
DSDA1
R108
Is there
a same signal as G7
(0 - 3.3 V)?
Yes
C
DSCL1
R108
Is there
a same signal as G8
TE
L 13942296513
(0 - 3.3 V)?
Yes
* When connected the source
equipment to IN4/3.
SDA(HDMI IN4/HDMI IN3) *
JA1152 (Pin 16)
G10
D
Does
a signal output in
constant period
(0 - 5 V)
?
Yes
SCL(HDMI IN4/HDMI IN3) *
JA1152 (Pin 15)
G11
Does
a clock output in
constant period
(0 - 5 V)
?
E
Yes
IC1254 (Pin 7)
G12
Is there
a same signal as G10
(0 - 4.4 V)?
www
Yes
F
50
1
http://www.xiaoyu163.com
2
*(94TXH/92TXH)
G9
No
Check the patterns in the path.
Check IC1251,IC1252.
No
Replace IC1251,IC1252.
G9
No
Check the patterns in the path.
Check IC1251,IC1252.
No
Replace IC1251,IC1252.
R13
No
Check the patterns in the path.
Check IC1255.
No
Replace IC1255.
R13
No
Check the patterns in the path.
Check IC1257.
No
Replace IC1257.
No
Check the patterns in the path.
Check JA1152.
No
Replace JA1152.
No
Check the patterns in the path.
Check JA1152.
No
Replace JA1152.
No
Check the patterns in the path.
Check IC1253,IC1254.
No
Replace IC1253, IC1254.
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y
. i
2
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3
8
IC1254 (Pin 4)
Is there
a same signal as G11
(0 - 4.4 V)?
Yes
R108
Is there
a same signal as G10
(0 - 3.3 V)?
Yes
R108
Is there
a same signal as G11
(0 - 3.3 V)?
Yes
JA301 (Pin 16)
Does
a signal output in
Q Q
constant period
3 6 7
(0 - 5 V)
?
Yes
JA301 (Pin 15)
Does
a clock output in
constant period
(0 - 5 V)
?
Yes
R308
Is there
a same signal as G13
(0 - 3.3 V)?
Yes
R307
Is there
a same signal as G14
(0 - 3.3 V)?
Yes
u163
D
VSX-94TXH
3
4
2 9 9 4
G12
No
Check the patterns in the path.
Check IC1253,IC1254.
Replace IC1253, IC1254.
DSDA1
R13
No
Check the patterns in the path.
Check IC1255.
Replace IC1255.
DSCL1
R13
No
Check the patterns in the path.
Check IC1257.
Replace IC1257.
SDA(HDMI OUT)
G13
No
Check the patterns in the path.
1 3 1 5 0 5 8 2 9
Check JA301.
Replace JA301.
SCL(HDMI OUT)
G14
No
Check the patterns in the path.
Check JA301.
Replace JA301.
DSDA
G15
No
Check the patterns in the path.
Check R358.
Replace Q953.
DSCL
G16
No
Check the patterns in the path.
Check R357.
m
co
Replace Q953.
.
4
2 8
9 9
No
No
No
9 4 2 8 9 9
No
No
No
No