32
SC-LX81
1
2
3
4
A
B
C
D
E
F
1
2
3
4
A
IC2701 (Pin 1, etc.)
1st DSP 1V
Is the voltage
1V?
No
L
Check the parts and patterns
in the path.
IC2801 (Pin 3, etc.) 2nd DSP 3.3V
Is the voltage
3.3V?
No
M
Check the parts and patterns
in the path.
Yes
IC2802 (Pins 7,8)
FLASH ROM
Is the voltage
3.3V?
No
N
Check the parts and patterns
in the path.
Yes
IC2711 (Pin 5)
2nd Block 1.25V
Is the voltage
1.25V?
No
No
Yes
Yes
Is IC2711
abnormally hot?
O
IC2801 (Pin 8, etc.) 2nd DSP 1.25V
Is the voltage
1.25V?
No
P
Q
Check the parts and patterns
in the path.
Yes
Yes
Yes
To Step 3
Replace IC2711.
1st Block 1V
1st Block 1V
Is the voltage
2.5V?
No
Yes
J
Check the parts and patterns
in the path.
IC2713 (Pin 2)
IC2713 (Pin 4)
Is the voltage
4.2-4.5V?
No
Yes
I
The output and GND may be short-
circuited. Check the path between
them.
No
Yes
Is IC2713
abnormally hot?
Replace IC2713.
The output and GND may be short-
circuited. Check the path between
them.
1st Block 1V
Is the voltage
1V?
No
Yes
K
IC2712 (Pin 5)
No
Yes
Is IC2712
abnormally hot?
Replace IC2712.
The output and GND may be short-
circuited. Check the path between
them.
X2701 (Pin 4)
24M OSC 3.3V
Is the voltage
3.3V?
No
R
Check the parts and patterns
in the path.
OSC Block 3.3V
Is the voltage
3.3V?
No
Yes
IC2706 (Pin 5)
No
Yes
Is IC2706
abnormally hot?
Replace IC2706.
The output and GND may be short-
circuited. Check the path between
them.
Check the parts and patterns
in the path.
IC2705 (Pin 20)
LATCH 2
Is the voltage
3.3V?
No
Yes
F
Check the parts and patterns
in the path.
IC2702 (Pins 12, 37) FLASH ROM
Is the voltage
3.3V?
No
Yes
G
H
Check the parts and patterns
in the path.
IC2703 (Pin 1, etc.) SDRAM
Is the voltage
3.3V?
No
Yes