SX-LX70SW
43
5
6
7
8
5
6
7
8
C
D
F
A
B
E
Replace IC501.
Replace IC501.
Yes
XMMK
IC501 (Pin 43)
N
o
Is there
a master clock
o
u
tp
u
t?
N
o
Is there
abnormality at the
parts and patterns
in the o
u
tp
u
t path?
Replace IC501.
Yes
XMLK
IC501 (Pin 41)
N
o
Is there
a LR clock
o
u
tp
u
t?
N
o
Is there
abnormality at the
parts and patterns
in the o
u
tp
u
t path?
Replace IC501.
Yes
XMFD
IC501 (Pin 37)
N
o
Is there
a a
u
dio data
o
u
tp
u
t?
N
o
Is there
abnormality at the
parts and patterns
in the o
u
tp
u
t path?
Replace IC501.
Yes
IC4001 (Pin 2)
N
o
Is there
a a
u
dio data
inp
u
t?
N
o
Is there
abnormality at the
parts and patterns
in the inp
u
t path?
Replace IC501.
Yes
IC4001 (Pin 3)
N
o
Is there
a LR clock
inp
u
t?
N
o
Is there
abnormality at the
parts and patterns
in the inp
u
t path?
Replace IC501.
XMBK
DAC L, R
IC501 (Pin 39)
N
o
Is there
a bit clock
o
u
tp
u
t?
N
o
Is there
abnormality at the
parts and patterns
in the o
u
tp
u
t path?
Yes
Replace IC501.
Replace IC4001.
IC4001 (Pin 1)
N
o
Is there
a bit clock
inp
u
t?
N
o
Is there
abnormality at the
parts and patterns
in the inp
u
t path?
Yes
IC4001 (Pins 7,
8
)
N
o
Is an A
N
ALOG
L/R o
u
t?
Yes
LPF OUT
IC4002 (Pins 1, 7)
N
o
Is an A
N
ALOG
L/R o
u
t?
Yes
Yes
IC4001 (Pin 16)
N
o
N
o
Is there
abnormality at the
parts and patterns
in the inp
u
t path?
Is there
a master clock inp
u
t
(24.576 MHz)?
Step 6:
Sound Confirmation
Check the parts and patterns
in the path.
Replace IC4002.
TU
N
ER/XM SELECTOR
IC4003 (Pins 3, 13)
to DSP TROUBLESHOOTI
N
G Step 4-2 :
W
hen a so
u
nd is not
o
u
t with the analog signal inp
u
t
N
o
Is an A
N
ALOG
L/R o
u
t?
Yes
Check the parts and patterns
in the path.
Replace IC4003.
Step 5:
Communication Confirmation
If there is not abnormality in the path
to the crystal, replace IC501 or X501.
IC501 (Pins 26,2
8
)
OSC
Insert the XM Antenna and check it.
N
o
Yes
Check the path to the microcomp
u
ter.
IC501 (Pin 11)
XMRST3
Is the
inp
u
t signal
3.3
V
?
N
o
Yes
Check the path to the microcomp
u
ter.
IC501 (Pins 3,5)
XMDI3, XMDO3
Does
I/O signal operate
with 0
V
to
3
V
?
N
o
Yes
IC501 (Pins 1
8
,19)
COMM_RX_P/M
to STEP6
Yes
(Abo
u
t 1.2
V
center)
Abnormality in XM
Antenna or replace
IC501.
N
o
N
o
Is a
signal of C
N
501-
pins 2 and 3
u
nstable
at 200m
V
p-p level?
Is a
signal
u
nstable at
200m
V
p-p level?
Does
crystal oscillate
abo
u
t 2 to 3
V
p-p?
Yes
Check the parts and
patterns in the inp
u
t path.
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 ...
