LG 22LS3500 / 22LS3700 (CHASSIS:LB21A) Service Manual ▷ View online
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(2) HD HDMI EDID data
(3) Detail EDID Options are below
a. Product ID
b. Serial No: Controlled on production line.
c. Month, Year: Controlled on production line:
ex) Week : '01' -> '01'
Year : '2012' -> '16' fix
d. Model Name(Hex):
cf) TV set’s model name in EDID data is below.
e. Checksum: Changeable by total EDID data.
f. Vendor Specific(HDMI)
4.3. Model name & Serial number D/L
▪ Press "Power on" key of service remote control.
(Baud rate : 115200 bps)
▪ Connect RS232 Signal Cable to RS-232 Jack.
▪ Write Serial number by use RS-232.
▪ Must check the serial number at the Product/Service info..
(menu key -> red key -> select product/Service info)
4.3.1. Signal Table
CMD : A0h
LENGTH : 85~94h (1~16 bytes)
ADH : EEPROM Sub Address high (00~1F)
ADL : EEPROM Sub Address low (00~FF)
Data : Write data
CS : CMD + LENGTH + ADH + ADL + Data_1 +...+ Data_n
Delay : 20ms
4.3.2. Comand Set
* Description
FOS Default write : <7mode data> write
Vtotal, V_Frequency, Sync_Polarity, Htotal, Hstart, Vstart, 0,
Phase
Data write : Model Name and Serial Number write in EEPROM,.
4.3.3. Method & notice
(1) Serial number D/L is using of scan equipment.
(2) Setting of scan equipment operated by Manufacturing
Technology Group.
(3) Serial number D/L must be conformed when it is produced in
production line, because serial number D/L is mandatory by
D-book 4.0.
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0
0
ff
ff
ff
ff
ff
ff
00 1E 6D
a
b
10
c
01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26
20 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 01 01
30 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 70
40 36 00 40 84 63 00 00 1E 64 19 00 40 40 00 26 30
50 18 88 03 06 40 84 63 00 00 18 00 00 00 FD 00 3A
60 3E 1E 53 10 00 0A 20 20 20 20 20 20
30 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 70
40 36 00 40 84 63 00 00 1E 64 19 00 40 40 00 26 30
50 18 88 03 06 40 84 63 00 00 18 00 00 00 FD 00 3A
60 3E 1E 53 10 00 0A 20 20 20 20 20 20
d
70
d
01
e
80 02 03 22 F1 4E 10 1F 84 13 05 14 03 02 12 20 21
90 22 15 01 26 15 07 50 09 57 07
90 22 15 01 26 15 07 50 09 57 07
f
A0 80 1E 01 1D 80 18 71 1C 16 20 58 2C 25 00 A0 5A
B0 00 00 00 9E 01 1d 00 80 51 D0 0c 20 40 80 35 00
C0 A0 5A 00 00 00 1E 8C 0A D0 8A 20 E0 2D 10 10 3E
D0 96 00 A0 5A 00 00 00 18 02 3A 80 18 71 38 2D 40
E0 58 2C 45 00 A0 5A 00 00 00 1E 00 00 00 00 00 00
F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
B0 00 00 00 9E 01 1d 00 80 51 D0 0c 20 40 80 35 00
C0 A0 5A 00 00 00 1E 8C 0A D0 8A 20 E0 2D 10 10 3E
D0 96 00 A0 5A 00 00 00 18 02 3A 80 18 71 38 2D 40
E0 58 2C 45 00 A0 5A 00 00 00 1E 00 00 00 00 00 00
F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
e
START 6E A 50 A LEN A 03 A CMD
A
00
A VAL A
CS STOP
MODEL NAME
HEX
EDID Table
DDC Function
HD/FHD Model
0001
01 00
Analog/Digital
MODEL NAME
MODEL NAME(HEX)
LG TV
00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 (LG TV)
EDID C/S data
HD
HDMI
RGB
Check sum
(Hex)
Block 0
A4
5C
Block 1
6E (HDMI1)
-
5E (HDMI2)
4E (HDMI3)
4E (HDMI3)
Input
Model name(HEX)
HDMI1
67030C001000
HDMI2
67030C002000
HDMI3
67030C003000
Adjust mode
CMD(hex)
LENGTH(hex)
Description
EEPROM WRITE
A0h
84h+n
n-bytes Write (n = 1~16)
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* Manual Download(Model Name and Serial Number)
If the TV set is downloaded by OTA or Service man, sometimes
model name or serial number is initialized.(Not always)
There is impossible to download by bar code scan, so It need
Manual download.
1) Press the "Instart" key of Adjustment remote control.
2) Go to the menu "6.Model Number D/L" like below photo.
3) Input the Factory model name or Serial number like photo.
4) Check the model name Instart menu. → Factory name displayed.
5) Check the Product/Service info..(Menu key → Red key →
Select product/Service info) → Buyer model displayed.
4.3.4. Outgoing condition Configuration
■ When pressing IN-STOP key by SVC remocon, Red LED
are blinked alternatively. And then automatically turn off.
(Must not AC power OFF during blinking)
4.4 Hi-Pot Test
Confirm whether is normal or not when between power
board's ac block and GND is impacted on 1.5 kV(dc) or 2.2
kV(dc) for one second.
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TROUBLE SHOOTING
1. Power-up boot check
Check stand-by Voltage.
IC3307
Pin 1, L3317 : +3.5V_ST
pin 5, R3387 : +3.5V_ST
Check Power connector
Main B/D 3.5V Line
Short Check
Check X201 clock
24 MHz
Replace X201
Check Q3302
RL_ON_BUFFER : 3.3V
Replace Mstar(IC101) or Main board
Check Multi Voltage
P3300 1~5 pin: +24V
JK3300, L3304 : +24V/+15V
Replace Adapter
Check Error Out & Inverter Control
P3300 pin 11 : Low
P3300 pin 12 : High
Check Power Board or Module
Check IC Output Voltage
IC3310 : 2.5V
IC3304 : 1.2V
IC3305 : 1.5V
Q3312 : 3.3V
Replace IC3304/3305/3310 or Q3312
Re-download software.
Check LVDS Power Voltage
Q3307 : 12V
Replace Q3307
Check Mstar LVDS Output
Replace Mstar (IC101) or Main Board
Change Module
ok
ok
ok
ok
ok
ok
ok
ok
No
No
No
No
No
No
No
No
No
ok
Replace Power board.
ok
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2. Digital TV Video
3. Analog TV Video
Check RF Cable & Signal
Check Tuner 3.3V Power
L3703
Replace L3703
Check Tuner 1.8V Power
IC3703 pin 2 : 1.8V
Check DIF[P]/[N] Signal
TU3704 Pin 10/11
Replace IC3703
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board
.
ok
ok
ok
ok
No
No
No
No
Bad Tuner. Replace Tuner
.
Check RF Cable & Signal
Check Tuner 3.3V Power
L3703
Replace L3703
Check Tuner 1.8V Power
IC3703 pin 2 : 1.8V
Replace IC3703 .
Check Mstar LVDS Output
Replace Mstar (IC101) or Main Board
.
ok
ok
ok
No
No
No
Check CVBS Signal
TU3704 8 Pin
ok
No
Bad Tuner. Replace Tuner
.
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