SX-LX70SW
27
5
6
7
8
5
6
7
8
C
D
F
A
B
E
5.2 DSP TROUBLESHOOTING
• It is ass
u
med that there is no loose connection or damage in the LCRs.
• Refer to the Block Diagram as well as the Schematic Diagram abo
u
t the signal flow.
• The following flow is the diagnosis method when the so
u
nd is not o
u
t from the SP o
u
tp
u
t.
Step 2: Power supply
MAIN ASSY
Q1302 Drain
V
S+5
FU
N
CTIO
N
Is the
each voltage
12
V
, 5
V
and
3.3
V
?
N
o
C
N
1001
Pin 2
V
S+12 inp
u
t
Pin 4
V
E+5 inp
u
t
Pin
8
V
S+3R3 inp
u
t
Yes
Replace C
N
1001 or
Connector Assy PF14-
PP-S27.
Replace IC3014.
Replace Q1302.
Check the power o
u
tp
u
t
of the S
W
Power S
u
pply.
Yes
N
o
Is there any
loose connection at C
N
1001
or Connector Assy PF14PP-
S27 at pins 2, 4,
8
?
Is the voltage
5
V
?
N
o
Yes
A
Step 1: Preliminary connecting confirmation
Confirm the following items before checking
Is there no
problem on the connection
at screw, connector,
or FFC cable
?
Tighten the coonection.
N
o
Yes
To Step 2
IC3011 (Pin 16)
Check the parts and patterns
in the path.
Is the voltage
12
V
?
N
o
Yes
I2S S
W
IC651 (Pin 16)
Check the parts and patterns
in the path.
Is the voltage
3.3
V
?
N
o
OP AMP
IC3012 (Pin
8
)
Check the parts and patterns
in the path.
Is the voltage
12
V
?
N
o
Yes
Check the parts and patterns
in the path.
Is the each
voltage
5
V
, 3.3
V
?
N
o
Yes
5
V
REG
IC3014 (Pin 3)
Is the voltage
5
V
?
N
o
A/D
DIR
Yes
Troubleshooting
IC3013
Pin 6 5
V
inp
u
t
Pin 7, 14 3.3
V
inp
u
t
Check the parts and patterns
in the path.
Is the each
voltage
5
V
, 3.3
V
?
N
o
Yes
Yes
IC301
Pin 13 5
V
inp
u
t
Pin 21, 3
8
3.3
V
inp
u
t
Check the parts and patterns
in the path.
IC901 (Pins 7,
8
)
DC-DC Converter
LC902 side
Is the voltage
5.0
V
?
N
o
Yes
L906
Replace IC901
Is the voltage
1.2
V
?
N
o
Yes
Содержание AS-LX70
Страница 3: ...SX LX70SW 3 5 6 7 8 5 6 7 8 C D F A B E ...
Страница 15: ...SX LX70SW 15 5 6 7 8 5 6 7 8 C D F A B E ...
Страница 26: ...SX LX70SW 26 1 2 3 4 1 2 3 4 C D F A B E HDMI Assy Check Points HDMI ASSY E Commonness HDMI SIDE B ...
Страница 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 ...
Страница 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 ...
Страница 76: ...SX LX70SW 76 1 2 3 4 1 2 3 4 C D F A B E 9 6 REMOTE CONTROL ...
Страница 97: ...SX LX70SW 97 5 6 7 8 5 6 7 8 C D F A B E ...
Страница 106: ...SX LX70SW 106 1 2 3 4 1 2 3 4 C D F A B E 10 15 POWER SUPPLY UNIT J ...
Страница 107: ...SX LX70SW 107 5 6 7 8 5 6 7 8 C D F A B E CN1001 CN3191 1 2 B 1 7 A J J POWER SUPPLY UNIT AWR7051 ...
Страница 108: ...SX LX70SW 108 1 2 3 4 1 2 3 4 C D F A B E ...
Страница 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 ...