48
SC-LX81
1
2
3
4
A
B
C
D
E
F
1
2
3
4
Step 5-1: Power supply
O1
Is the voltage
3.3 V?
No
Check the L1302.
No
Replace L1302.
Check the L1303.
No
Replace L1303.
Is the voltage
3.3 V?
No
Check the L1301.
No
Replace L1301.
Is the voltage
1.8 V?
No
Check the L1304.
No
Replace L1304.
Is the voltage
1.8 V?
No
Check the L1305.
No
Replace L1305.
Is the voltage
1.8 V?
No
3.3 V (Scaler)
Check the L1351.
No
Replace L1351.
Check the X1301.
No
Replace X1301 or IC1301.
Is the voltage
3.3 V?
No
Step 5-2: X'tal, Reset
X1301
X'tal
P1
No
IC1301(Pin 47)
XVCRST
N1
Is the voltage
"H"(3.3 V)?
No
Check the parts and patterns in
the path(IC501 - IC1301).
No
Replace IC501.
IC1301(Pin 46)
VCSDA
N1
No
Check the parts and patterns in
the path(IC501 - IC1301).
No
Replace IC501 or IC1301.
IC1301(Pin 45)
VCSCL
N1
No
Check the parts and patterns in
the path(IC501 - IC1301).
No
Replace IC501 or IC1301.
I
Scaler section
Is oscillation
of 13.5 MHz
?
Does
a clock output in
constant period
(0 - 3.3 V)
?
Does
a signal output in
constant period
(0 - 3.3 V)
?
No
Replace IC401.
Check the parts and patterns in
the path (IC401 - IC1301).
Step 5-3: INPUT
IC1301(Pin 4)
LLC
N1
Is there a
CLK?
No
Replace IC401.
Check the parts and patterns in
the path (IC401 - IC1301).
No
Yes
IC1301(Pins 29,
32-35,38-40)
P22-29
N1
Is there a
DATA?
No
Yes
L1303
Yes
O2
3.3 V (Scaler)
L1301
Yes
O3
1.8 V (Scaler)
L1304
Yes
O4
1.8 V (Scaler)
L1305
Yes
O5
1.8 V (Scaler)
L1351
Yes
Yes
Yes
Yes
Yes
Yes
O6
3.3 V (SDRAM)
L1302