Q?
L8804 L8805
P8800 P8200
Q8200
Q8201
D8306
Q8300 Q8303
Q8301
Q8304
D8307
IC8400
Q8302
Q8305
D8309
Q8700
IC8700
Q8701
Q8205
Q8203

47LE8500 INTERCONNECT DIAGRAM

Intelligent Sensor
Intelligent Sensor
Stand-by
P8200 "MAIN Board" To CON1 "IR Board"
Indicates Hot
Ground
SMPS TEST 1
P201
A
PWR ON
3 17 511 915 1319 1721
4 28 612 1016 1420 1822
23
24
STBY 3.5V
12V12V
STBY 3.5V
24V24V
24V
12V
INV-ON
B
SMPS TEST 2
P201
A
PWR ON
3 17 511 915 1319 1721
4 28 612 1016 1420 1822
23
24
STBY 3.5V
12V12V
STBY 3.5V
24V24V
24V
12V
Front pins on connector
are odd numbers.
Front pins on connector
are odd numbers.
INVERTER (SECONDARY)
Both Inverters p/n: AFB72950101
CN1
LED Extension Board
CN2
LED Extension Board
CN12
CN13
LED Extension Board
V73~V80
V81~V88
V1~V8
V9~V16
V17~V24
V25~V32
V33~V40
V41~V48
V49~V56
CN23
CN24
To the Panel
P204 "SMPS" To CN1 "INVERTER Main"
Diode Check
9IR1.57V Open
10 Gnd Gnd Gnd
11 3.3V_Normal 0V 0.59V
12 LED_BUZZ 0V Open
Pin Label STBY Run
1.54V
Gnd
3.3V
0V
7 Gnd Gnd Gnd Gnd
8LED_LOGO0V 0V Open
Pin Label STBY Run
1 SCL 3.45V 3.45V Open
2 SDA 3.45V 3.45V Open
3GndGndGndGnd
4 Key1 3.29V 3.29V 1.9V
5 Key2 3.29V 3.29V 1.9V
6 3.5V_ST 3.45V 3.45V 1.24V
Diode Check
P7901 "MAIN Board" To CN103 "Inverter Main"
Pin Label STBY Run Diode
1 R_VS 0V 0.04V Open
2
3M2_MOSI0V
*0.04V~3.2V 1.1V
4
Gnd Gnd Gnd Gnd
5
6
7
8
M2_SCLK 0.23V 1.1V
0V
Gnd Gnd Gnd Gnd
M3_MOSI 0V 1.1V
M3_SCLK 1.1V
0V
Gnd Gnd Gnd Gnd
0V
0V
*Black to White
*Black to White
P7900 "MAIN Board" To CN1 "Inverter Main"
Pin Label STBY Run Diode
1 L_VS 0V 0.05V 1.08V
2 M0_MOSI 0V *0.04V~3.2V 1.08V
3 M0_SCLK 0V 0.23V 1.08V
4 Gnd Gnd Gnd Gnd
5 M1_MOSI 0V *0.04V~3.2V 1.08V
6 M1_SCLK 0V 0.23V 1.08V
7 Gnd Gnd Gnd Gnd
8 S_CS_N 0V 2.6V 1.08V
9 S_MOSI 0V *0.18V~0.28V 1.08V
10 S_SCLK 0V 1.08V
2.99V
P8800 "Main" To "Speakers"
Pin SBY Run Diode
1 SPK-R(-) 0V 12.3V Open
2 SPK-R(+) 0V 12.3V Open
3 SPK-L(-) 0V 12.3V Open
4 SPK-L(+) 0V 12.3V Open
Label
(1)PDIM Pin 20 can vary according to incoming video IRE level,
OSD Backlight setting and then Intelligent Sensor (room light
condition) Output from the Video Processor IC900.
Range 0.37V to 3.3V.

Front IR

IR Receiver
Intelligent
Sensor CON1
Front “Soft Switch” Keys
CON3
CON2
LG Logo
CN25
CN26
CN27
CN28
CN29
CN30
CN31
CN32
CN33
V25~V32
V33~V40
V41~V48
V49~V56
V57~V64
V65~V72
V73~V80
V81~V88
V89~V96
CN10
100 IRE
3.68V p/p 120Hz
Note: If a particular block is exhibiting a dimmer level
that the other or the overall brightness seems dim, be
sure to first check the customer’s Menu setting for
Backlights. Raise the percentage and see if the overall
brightness returns to normal. If not,
1st: Check the P-DIM level, it should rise with the
percentage shown on screen. 100%, 3.3V. Follow the P-
DIM signal all the way to each Inverter.
2nd: Turn off the set and unplug the connector to the
Inverters coming from the Main board. If the brightness
returns to normal, the Main board is defective.
Drive Signals
to LED Blocks
5 IRE
3.88V p/p 120Hz
Each connector (27 total) to the LED Blocks (216)
have two pins delivering B+ 13V and 8 Drive Signals
To force a Block to turn
on, simple ground the
pin providing the 13V
source is present.
CN11
CN4
CN5
CN6
CN7
CN8
CN9
CN3
CN22
CN14
CN15
CN16
CN17
CN18
CN19
CN20
CN21
SMPS TEST 1: To Force Power
Supply On.
Disconnect P8000 on Main board.
(A) Jump pins 9, 10, 11 or 12 (3.5V)
to pin 1. (Test Voltage Outputs 12V,
24V to Main and 24V to both
Inverters). Remove AC power.
Leave the jumper in place.
SMPS TEST 2: (B) Jump pins 9, 10,
11 or 12 (3.5V) to pin 18 (INV-ON).
Apply AC power, the Backlights
should turn on.
Note; If Inverter Main or Secondary
is loading down 24V, each Inverter
can be run separately:
Remove AC and Disconnect P204.
When AC is reapplied, the Backlight
LEDs on the Right (Back View)
should turn on.
Remove AC and Disconnect P205
and reinstall P204. When AC is
reapplied, the Backlight LEDs on the
Left (Back View) should turn on.
For Waveforms on P7900 and P7901
See 2nd page of Interconnect.
SK101
AC In
D221
T102 IC502
IC103
IC501
T501
F101
3.15A/250V
Q111 Q110
Q231
F100
6.3A/250V
CX103
RL101
G
D
SG
S
C
BE
BD101
+
-
Q605
D602
G
D
S
C
AQ606
D603
G
D
S
C
A
L600
L601
F501
3.15A/250V
47uF/450V
47uF/450V
47uF/450V
47uF/450V
47uF/450V
47uF/450V
T101 A1
A2
A1 C
D222
Q251
Q252
P201
P205
P204
C
A1
A2
D201
IC102
RL102
CX102
CX101
D601
D100
DF501 Hot Gnd
STBY 159.6V
Run 392.6V
F101 Hot Gnd
STBY 2.9V
Run 393.3V D607
D102
D101
C = 3.45V
A1/A2 = 0V
SMPS BOARD
p/n: EAY60908801
A2
C
A
C
AC
IC603
IC605
P7500P7501
IC8005
IC8900
X1001
Grayed out components
are on the back
54Mhz
P7901
L8015
Rubber
3
2
1
3
2
1
IC8007
IC8008
L8905 IC8903
IC8003
L8010
IC301
L8009
IC8001
IC302
L8004
IC901
IC8000
IC300
Q300
Q8004
Q8003
Q8001
Q8005
IC9102
L9100
L9102
L9101
IC9103
D9102
D9101
IC9302
L9301 IC8902
L8904 IC8002
L8012
IC700
SW9300
X9300
25Mhz
IC9300
P7900
X9000
12Mhz
P9000 Update
X8100
IC8101
SW8100
IC1000
SW1000
IC8004
IC8800
Q8800
IC8801
IC9100
IC8901
IC9301
LG5111 RX/TX
IC9001
T-CON
LG7378A
IC8300
MICRO
Q8306
Q8307
TU700
TDVJ-H031F
2. NC
1. NC
Analog Video
Digital Video
P9000
USB1
USB2
HDMI
HDMI
Select
IC606 IC602
IC604
Q8000Q8002
IC9303
IC9101
IC8100
D8312
Q8308
Q200
IC8401
Q702
Q701
Q901
18. IF p
17. IF n
16. IF AGC
15. Reset
14. 3.3V
13. 1.26V
12. GND
11. CVBS
10. NC
9. SIF
8. NC
7. SDA
6. SCL
5. NC
4. NC
3. 5V
IC8200
IC9000
10
Mhz
X8101
32.768Khz
MAIN BOARD
p/n: EBU60842601
IC900
Video Processor
LGE3549XQ
S
D
G
A
C
AC
S
D
G
1
23
D
G
S
P8000
E
C
B
E
CB
E
C
B
E
CB
F101
12A/65V
C101
A0950
1050C+
-
A0948
1050C+
-
CN103
U103
L207
CN104
U3
E
C
B
EC
B
24.6V
3.3V
3.4V
CN105
U4
U5
U13
U2
U501
CN101
U101 Q106
Q105
N/C
E
CBQ3
Q12
Q108
Q109
Q103
Q101
Q102
L206 Q501
12.8V
13V
24.6V
13V
DO NOT
MEASURE
C151
Y501
8Mhz
F1
12A/65V
U4
U5U6
Q4
Q5
C75
A0950
1050C+
-
A0950
1050C+
-
C98
Q7
Q8
L101
L102
A0948
1050C+
-
C89 CN11
U103 L103
CN3 CN2
CN4
CN5
U10
U1
U501
U7
U3 U11
U8
U13
E
C
B
Q10
U101
E
C
B
Q2
E
C
B
Q16
E
C
B
Q11
E
C
B
Q1
Q15
EC
B
E
CB
Q3
Q12
24.6V
Gnd
3.3V
3.46V
13V12.96V
13V
12.77V
24.6V
13V
13V
DO NOT
MEASURE
CN1
U102
U9
Y501 Y1
8Mhz 8Mhz
INVERTER (MAIN)
Both Inverters
p/n: AFB72950101
V105~V112
V113~V120
V121~V128
V29~V136
V137~V144
V145~V152
V153~V160
V161~V168
V169~V176
1
2
3
18.15V
24.6V
12.8V
Q105
1
2
3
5V
12.8V
Gnd
Q106
1
2
3
18.3V
24.6V
12.9V
Q4 / Q7
1
2
3
5V
12.9V
Gnd
Q5 / Q8
Pin Label STBY Run
1-5 24V 0V 24.6V 0.424V
6-10 GND GND GND GND
11 (1)P-DIM 0V 0.37V~3.3V Open
12 (2)I-C 0V 2.92V Open
13 n/c n/c n/c Open
14 ERROR 0V 0V Open
Diode
(2)I-C is Inverter On (INV_ON)
P205 "SMPS" To CN201 "INVERTER Secondary"
Pin Label STBY Run Diode
1-5 24V 0V 24.6V 0.424V
6-10 GND GND GND GND
11 0V 0.37V~3.3V Open
12 0V 2.92V Open
(1)P-DIM
(2)I-C
P8000
Pin Label STBY Run Diode1 PWR-ON 0V 3.3V 1.68V2-4 24V 0V 24.6V 0.424V5-8 Gnd Gnd Gnd Gnd9-12 3.5V 3.45V 3.44V Open13-15 Gnd Gnd Gnd Gnd16 n/c n/c n/c Open17 12V 0V 11.9V 1.39V18 INV-ON 0V 2.92V Open19 12V 11.9V 1.39V
20 (1)P-DIM 0V 0.37V~3.3V Open
21 12V 11.9V 1.39V22 n/c n/c 0V Open23 n/c n/c 0V Open24 ERROR 0V 0V Open
P201 "SMPS" To P8000 "MAIN Board"
Diode
Gnd
Open
Open
Gnd
1.24V
Gnd
Open
Open
1.63V
Open
Open
Open
Open
Open
0V0V
CON2 "IR Board" To "Soft Touch Key Board"
Pin STBY Run Diode
13.45V 3.36V Open
20V 1.63V Open
3Gnd Gnd Gnd
43.3V 3.3V Open
53.28V 3.28V Open
6Gnd Gnd Gnd
73.45V 3.36V Open
83.45V 3.36V Open
Pin STBY Run Diode
13.45V 3.0V 1.5V
2Gnd Gnd Gnd
31.36V 0.64V Open
4
Pin STBY Run Diode
CON3 "IR Board" To
"Center Logo Board"
Gnd Gnd Gnd
SW8100Micro
Reset
SW1000Video
Reset
SW9300Tru-Motion
Reset
P8100
Leandro Palmeira
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