46
SC-LX81
1
2
3
4
A
B
C
D
E
F
1
2
3
4
Step 4-4: I2C
IC401(Pin 121)
VCSDA
M1
No
Check the parts and patterns in
the path(IC501 - IC401 and
IC501-IC601).
No
Replace IC501 or IC401 or IC601.
IC401(Pin 122)
VCSCL
M1
No
Check the parts and patterns in
the path(IC501 - IC401 and
IC501-IC601).
No
Replace IC501 or IC401 or IC601.
Step 4-5: VIDEO CLK,DATA
IC401(Pin 17)
LLC
M1
Is there a
CLK?
No
Check the parts and patterns in
the path(IC401 - IC1301 and
IC401-IC1381).
No
Replace IC401.
IC401(Pins 161-164,
155-158)
P22-P29
N1
Is there a
DATA?
No
Check the parts and patterns in
the path(IC401 - IC1301 and
IC401-IC1384).
No
Replace IC401.
Yes
Yes
IC401(Pins 21-28)
P12-19
N1
Is there a
DATA?
No
Check the parts and patterns in
the path(IC401 - IC1301 and
IC401 and IC1383).
No
Replace IC401.
G
*Only
480p/576p/720p/1080i input
Yes
R436,R435
P10, P11
N2
Is there a
DATA?
No
Check the parts and patterns in
the path(IC601 - IC401).
No
Replace IC401.
R431,R430
P20, P21
N3
Is there a
DATA?
No
Check the parts and patterns in
the path(IC601 - IC401).
No
Replace IC401.
Yes
Does
a clock output in
constant period
(0 - 3.3 V)
?
Does
a signal output in
constant period
(0 - 3.3 V)
?
IC501(Pin 3)
XVCRST(ENC)
M2
Is the voltage
"H"(3.3V)?
No
Check the parts and patterns in
the path(IC501 - IC601).
No
Replace IC501.
Check the X401 or IC402.
No
Replace X401 or IC402.
IC401(Pin 80)
XTAL
M1
No
Is there a CLK
(28.63636 MHz)
?
Yes
*Only 480i/576i input
R401(IC601 Side)
R429,R428(IC601 Side)
LLC
N4
Is there a
CLK?
No
Check the parts and patterns in
the path(IC401 - IC601).
No
Replace IC401.
*Only 480i/576i input
P22-29
N5
Is there a
DATA?
No
Check the parts and patterns in
the path(IC401 - IC601).
No
Replace IC401.
Yes
Step 4-3: Reset
IC401(Pin 83)
XVCRST(DEC)
M1
Is the voltage
"H"(3.3V)?
No
Check the parts and patterns in
the path(IC501 - IC401).
No
Replace IC501.
Yes
Yes
Yes
Yes
Yes
Yes
H