VSX-74TXVi
211
5
6
7
8
5
6
7
8
C
D
F
A
B
E
IC152 (pins 3, 6)
Are
signals the same
as those at Pins 2
and 5 detected
?
No
Yes
Are
signals the same
as those at Pins 2
and 5 detected
?
A
M
Q153 (pins 1, 4)
No
N
IC152 (pins 2, 5)
DDC_RX1
Are signals
detected?
No
Yes
M
IC172 (pins 2, 5)
DDC_RX2
Are signals
detected?
No
R
Yes
IC161 (pins 2, 15)
No
O
IC151 (pin 8)
Is the voltage
about 5V?
No
Yes
P
Yes
Yes
IC172 (pins 3, 6)
No
Yes
R
Q173 (pins 1, 4)
No
S
Yes
Yes
IC161 (pins 4, 11)
O
IC171 (pin 8)
Is the voltage
about 5V?
No
Yes
T
Yes
Replace IC171
IC101 (pins 58, 59,
62, 63, 66, 67, 70, 71)
Do signals
(approx. 0.5 Vp-p)
run in all the
lines?
No
TMDS_RX2
Q
Are
signals the
same as those at Pins
6 and 3 but whose voltage
has been converted
from 5V to 3V
detected?
Are
signals the
same as those at Pins
6 and 3 but whose voltage
has been converted
from 5V to 3V
detected?
Are
signals the
same as those at Pins
3 and 13 detected
immediately after
the power is
turned on?
Check the soldering of CN101.
If soldering has not been done
correctly, replace CN101.
Check the soldering of IC152.
If soldering has not been done
correctly, replace IC152.
Check the soldering of Q153.
If soldering has not been done
correctly, replace Q153.
Check the soldering of IC161.
If soldering has not been done
correctly, replace IC161.
No
Are
signals the
same as those at Pins
3 and 13 detected
immediately after
the power is
turned on?
Check the soldering of IC161.
If soldering has not been done
correctly, replace IC161.
Check the soldering of Q173.
If soldering has not been done
correctly, replace Q173.
Check the soldering of IC172.
If soldering has not been done
correctly, replace IC172.
Check the soldering of CN102.
If soldering has not been done
correctly, replace CN102.
Check the soldering of CN102.
If soldering has not been done
correctly, replace CN102.
Check the soldering of D171.
If soldering has not been done
correctly, replace D171.
Check the soldering of D151.
If soldering has not been done
correctly, replace D151.
Check the soldering of IC151.
If soldering has not been done
correctly, replace IC151.