SX-LX70SW
28
1
2
3
4
1
2
3
4
C
D
F
A
B
E
N
o
Replace IC904.
The o
u
tp
u
t and G
N
D may be short-
circ
u
ited. Check the path between
them.
Yes
Is IC904
abnormally hot?
A
B
Is the voltage
1.2
V
?
N
o
Yes
C902 side 1st DSP 1.2
V
IC101 (B7 (L103), etc.)
Check the parts and patterns
in the path.
1.2
V
Reg
u
lator
Is the voltage
1.2
V
?
N
o
Yes
IC904 (Pins 3,4)
Check the parts and patterns
in the path.
Is the voltage
3.3
V
?
N
o
Yes
IC904 (Pin 5)
Check the parts and patterns
in the path.
IC103 (Pin 20)
LATCH1
1.2
V
REG
Is the voltage
3.3
V
?
N
o
Yes
Check the parts and patterns
in the path.
IC104 (Pin 20)
LATCH1
Is the voltage
3.3
V
?
N
o
Yes
Check the parts and patterns
in the path.
IC105 (Pin
8
)
4LI
N
E DECODER(CE)
Is the voltage
3.3
V
?
N
o
Yes
Check the parts and patterns
in the path.
IC106 (Pin 37)
FLASH ROM
Is the voltage
3.3
V
?
N
o
Yes
Check the parts and patterns
in the path.
IC107 (Pins 9,27)
SRAM
Is the voltage
3.3
V
?
N
o
Yes
Check the parts and patterns
in the path.
IC109 (Pin 5)
Logic IC
Is the voltage
3.3
V
?
N
o
Yes
Yes
Check the parts and patterns
in the path.
IC551 (Pin
8
)
OSC Inverter
Is the voltage
3.3
V
?
N
o
Check the parts and patterns
in the path.
IC701 (Pins 9, 17)
LIPSY
N
C IC
Is the voltage
3.3
V
?
N
o
Yes
Check the parts and patterns
in the path.
IC751 (Pins 9, 17)
LIPSY
N
C IC
Is the voltage
3.3
V
?
N
o
Yes
Check the parts and patterns
in the path.
IC291 (Pin 14)
A
u
dio MCK B
u
ffer
Is the voltage
3.3
V
?
N
o
Yes
Check the parts and patterns
in the path.
Is the each
voltage
1.25
V
, 3.3
V
?
N
o
Yes
IC201
Pin
8
,etc 1.25
V
inp
u
t 2nd DSP
Pin 41,etc 3.3
V
inp
u
t
Summary of Contents for AS-LX70
Page 3: ...SX LX70SW 3 5 6 7 8 5 6 7 8 C D F A B E ...
Page 15: ...SX LX70SW 15 5 6 7 8 5 6 7 8 C D F A B E ...
Page 68: ...SX LX70SW 68 1 2 3 4 1 2 3 4 C D F A B E 9 2 PACKING AS LX70 x 2 Refer to 9 6 REMOTE CONTROL ...
Page 74: ...SX LX70SW 74 1 2 3 4 1 2 3 4 C D F A B E 9 5 DISPLAY UNIT H G I NON CONTACT SIDE CONTACT SIDE ...
Page 76: ...SX LX70SW 76 1 2 3 4 1 2 3 4 C D F A B E 9 6 REMOTE CONTROL ...
Page 97: ...SX LX70SW 97 5 6 7 8 5 6 7 8 C D F A B E ...
Page 106: ...SX LX70SW 106 1 2 3 4 1 2 3 4 C D F A B E 10 15 POWER SUPPLY UNIT J ...
Page 108: ...SX LX70SW 108 1 2 3 4 1 2 3 4 C D F A B E ...
Page 130: ...SX LX70SW 130 1 2 3 4 1 2 3 4 C D F A B E CN3 CN2 J J POWER SUPPLY ASSY SIDE B SIDE B J ...