35
SC-27
5
6
7
8
5
6
7
8
A
B
C
D
E
F
IC2309 (Pin 2)
1st Block 1V
Replace IC2309.
Is the
v
oltage
4.2 V-4.5 V
?
No
No
The o
u
tp
u
t and GND may
b
e short-
circ
u
ited. Check the path
b
et
w
een
them.
Yes
Yes
Is IC2309
a
b
normally hot?
A
I
J
Check the parts and patterns
in the path.
IC2301 (Pin 1, etc.) 1st DSP 1V
Is the
v
oltage
1 V?
No
Yes
L
Check the parts and patterns
in the path.
IC2309 (Pin 4)
Is the
v
oltage
2.5 V?
No
Yes
Replace IC2310.
No
The o
u
tp
u
t and GND may
b
e short-
circ
u
ited. Check the path
b
et
w
een
them.
Yes
Is IC2310
a
b
normally hot?
K
IC2310 (Pin 5)
Is the
v
oltage
1 V?
No
Yes
Check the parts and patterns
in the path.
IC2305 (Pin 20)
LATCH 2
Is the
v
oltage
3.3 V?
No
Yes
F
Check the parts and patterns
in the path.
IC2302 (Pins 12, 37)
FLASH ROM
Is the
v
oltage
3.3 V?
No
Yes
G
Check the parts and patterns
in the path.
IC2303 (Pin 1, etc.) SDRAM
Is the
v
oltage
3.3 V?
No
Yes
H
IC2308 (Pin 5)
2nd Block 1.25V
Is the
v
oltage
1.25 V?
No
No
Yes
Yes
Is IC2308
a
b
normally hot?
O
IC2401 (Pin 8, etc.) 2nd DSP 1.25V
Is the
v
oltage
1.25 V?
No
P
Check the parts and patterns
in the path.
Check the parts and patterns
in the path.
IC2401 (Pin 3, etc.) 2nd DSP 3.3V
Is the
v
oltage
3.3 V?
No
Yes
IC2501 (Pin 5)
OSC Block 3.3V
Is the
v
oltage
3.3 V?
No
No
Yes
Yes
Is IC2501
a
b
normally hot?
Q
X2501 (Pin 4)
24M OSC 3.3V
Is the
v
oltage
3.3 V?
No
R
Check the parts and patterns
in the path.
Yes
Yes
M
To Step 3
Replace IC2308.
Replace IC2501.
The o
u
tp
u
t and GND may
b
e short-
circ
u
ited. Check the path
b
et
w
een
them.
The o
u
tp
u
t and GND may
b
e short-
circ
u
ited. Check the path
b
et
w
een
them.