Panasonic PT-LX270U / PT-LX270E / PT-LX270EA / PT-LX300U / PT-LX300E / PT-LX300EA Service Manual ▷ View online
PT-LX270 / PT-LX300 series
3-9
3-6 Remote control troubleshooting
PT-LX270 / PT-LX300 series
3-10
3-7 Electronic Function Block Diagram
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
D
o
c
u
m
e
n
t:
S
iz
e
S
c
h
e
m
a
ti
c
:
R
e
v
:
S
h
e
e
t:
o
f
C
o
re
tr
o
n
ic
T
e
c
h
n
o
lo
g
y
I
n
c
.
N
o
.1
1
,
L
i-
H
s
in
g
R
o
a
d
,
S
c
ie
n
c
e
P
a
rk
,
H
s
in
c
h
u
,
T
a
iw
a
n
3
0
0
,
R
.O
.C
.
G
1
.0
D
D
P
4
4
2
X
M
a
in
B
o
a
rd
A
3
2
4
2
4
A
B
lo
c
k
D
ia
g
ra
m
D
o
c
u
m
e
n
t:
S
iz
e
S
c
h
e
m
a
ti
c
:
R
e
v
:
S
h
e
e
t:
o
f
C
o
re
tr
o
n
ic
T
e
c
h
n
o
lo
g
y
I
n
c
.
N
o
.1
1
,
L
i-
H
s
in
g
R
o
a
d
,
S
c
ie
n
c
e
P
a
rk
,
H
s
in
c
h
u
,
T
a
iw
a
n
3
0
0
,
R
.O
.C
.
G
1
.0
D
D
P
4
4
2
X
M
a
in
B
o
a
rd
A
3
2
4
2
4
A
B
lo
c
k
D
ia
g
ra
m
D
o
c
u
m
e
n
t:
S
iz
e
S
c
h
e
m
a
ti
c
:
R
e
v
:
S
h
e
e
t:
o
f
C
o
re
tr
o
n
ic
T
e
c
h
n
o
lo
g
y
I
n
c
.
N
o
.1
1
,
L
i-
H
s
in
g
R
o
a
d
,
S
c
ie
n
c
e
P
a
rk
,
H
s
in
c
h
u
,
T
a
iw
a
n
3
0
0
,
R
.O
.C
.
G
1
.0
D
D
P
4
4
2
X
M
a
in
B
o
a
rd
A
3
2
4
2
4
A
B
lo
c
k
D
ia
g
ra
m
R
S2
3
2
-C
o
m
p
o
n
e
n
t
A
U
D
IO
I
N
FAN x2
A
LAMP
-V
id
e
o
L
P
C
1
1
1
3
F
B
D
4
8
/3
0
3
-A
n
a
lo
g
P
M
D
1
0
0
0
M
S
T
3
3
6
3
C
M
K
A
F
E
1
0
0
0
1
2
V
F
L
A
S
H
D
A
D
2
0
0
0
RGB 30 Bit
-C
o
m
p
o
s
it
e
A
U
D
IO
O
U
T
K
e
y
p
a
d
C
W
M
o
to
r
P
T
2
3
3
4
2
W
M
o
n
o
A
m
p
.
LVPS
IR
R
e
m
o
te
U
SB
T
R
A
N
S
IS
T
O
R
C
W
i
n
d
e
x
SPEA
K
ER
20 MHz
D
M
D
Audio I2S
V
G
A
O
U
T
R
J
4
5
L
A
N
L
A
N
C
o
n
tr
o
l
F
u
s
io
n
D
M
D
P
o
w
e
r
PWM
A
D
A
4
8
6
2
-3
H
D
M
I
-D
ig
it
a
l
P
C
P2
P1
D
D
P4
4
2
X
A
SI
C
D
M
D
C
H
IP
C
O
N
T
R
O
L
P
M
D
1
0
0
0
C
1
.1
V
1
.8
V
3
.3
V
5
V
A
P
A
2
1
7
2
PT-LX270 / PT-LX300 series
3-11
3-8 Pin Assignment
Note: The Pin Voltage is only for your reference, as some of PIN needed to measure of
current or sync pulse to determine.
J1: 8Pin POWER From LVPS
J2:Front IR
PIN
Description
Voltage(V)
pin5
J1
pin4
PIN
Description
Voltage(V)
1
12
12V +/- 5%
1
IR_F_VCC
5V +/- 5%
2
12
12V +/- 5%
2
GND
0
3
GND
0
3
IR_F
Signal Low=0V,
High=5V
4
PFC_ON
Singal
5
5
5V +/- 5%
J15: Speaker
6
GND
0
PIN
Description
Voltage(V)
7
GND
0
pin8
pin1
1
SP_L+
Signal (Range
0V~5V)
8
12
12V +/- 5%
J2
2
SP_L-
Signal (Range
0V~5V)
9
J13: Photo sensor
10
11
pin3
pin1
PIN
Description
Voltage(V)
12
1
PHOTO 1
1.18V
13
J15
2
PHOTO 2
Signal Low=0V,
High=1.8V
14
3
GND
0
15
J13
16
pin2
pin1
J11: CW to MB
J9: System fan
pin3 pin1
PIN
Description
Voltage(V)
J11
PIN
Description
Description
1
CWY1
Signal Low=0V,
High=12V
1
FAN1_P1
Fan Voltage
(4V~12V)
2
CWY2
Signal Low=0V,
High=12V
2
FAN1_P2
Signal Low=0V,
High=3.3V
3
CWY3
Signal Low=0V,
High=12V
3
GND
Signal
Low=0V,High=5V
4
CWCTR1
Signal
Low=3.6V,
High=12V
J9
PT-LX270 / PT-LX300 series
3-12
J12:Lamp driver
PIN
Description
Voltage(V)
J10:Blower fan
1
LAMPLIT_IN
Signal Low=3.3V,
High=5V
PIN
Description
Voltage(V)
2
GND
0
1
FAN1_P1
Fan Voltage
(4V~12V)
3
P5V
5V +/- 5%
2
FAN1_P2
Signal Low=0V,
High=3.3V
4
LAMPEN_
OUT
Signal Low=0V,
High=5V
3
GND
Signal Low=0V,
High=5V
5
LAMP_TXD4
Signal Low=0V,
High=5V
J12 J8
pin5 pin1 pin3 pin1
Note:The Pin Voltage is only for your reference, as some of PIN needed to
measure of current or sync pulse to determine.
Click on the first or last page to see other PT-LX270U / PT-LX270E / PT-LX270EA / PT-LX300U / PT-LX300E / PT-LX300EA service manuals if exist.