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SX-LX70SW
42
1
2
3
4
1
2
3
4
C
D
F
A
B
E
5.3 XM TROUBLESHOOTING
• This flow is the diagnosis method when there is no reception or no so
u
nd o
u
tp
u
t.
• It is ass
u
med that there is no loose connection or damage in the LCRs.
• Refer to Block Diagram beside the Schematic Diagram abo
u
t the signal flow.
Troubleshooting
Step 1: Preliminary connecting confirmation
Step 3: Abnormal in external Power Supply
Step 4: Reception Confirmation
Step 2: Power
Confirm the following items before checking
“XM PO
W
ER ERR” is displayed on FL display or no display, etc.
Switch to Antenna Aiming mode at XM men
u
.
Is XM A
N
TE
NN
A
is s
u
rely connected
to XM JACK
?
Tighten the connection.
N
o
To Step 4
DC-DC CO
NV
ERTER
IC502 (Pin 1)
N
o
Is the voltage
aro
u
nd 12.0
V
?
Yes
Check the parts and patterns
in the path.
TU
N
ER/XM SELECTOR
IC4003 (Pin 16)
N
o
Is the voltage
aro
u
nd 12.0
V
?
Yes
Check the parts and patterns
in the path.
To Step 4
To Step 6
DIGITAL RADIO U-COM
IC5201 (Pin 54)
N
o
Is the voltage
aro
u
nd 3.3
V
?
Yes
Check the comm
u
nication and power
line of IC5201
Signal strength indicator
N
o
Is the indication
OK?
Yes
To Step 2
Yes
Yes
To Step 5
N
o
DIGITAL RADIO U-COM
DISPLAY
IC5201 (Pin 55)
N
o
Is the voltage
aro
u
nd 3.3
V
?
Yes
Check the parts and patterns
in the path.
Or the XM A
N
TE
NN
A may be
defective .
DAC
IC4001 (Pin 5) 3.3
V
I
N
PUT
(Pin 6) 5.0
V
I
N
PUT
N
o
Check the parts and patterns
in the path.
XM DT
IC501 (Pins 4,
8
, other)
N
o
Is the voltage
aro
u
nd 3.3
V
?
Yes
Yes
Check the parts and patterns
in the path.
L502 C507 side
N
o
Is the voltage
over 5.0
V
?
Yes
Replace IC502 or XM A
N
TE
NN
A.
Check C
N
501.
To STEP3
Does the reception becomes
OK by relocating the antenna
near a window?
Is the voltage
aro
u
nd each
3.3
V
or 5.0
V
?
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 ...