LG 26LT360C-TA (CHASSIS:LB2AB) Service Manual ▷ View online
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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)
4.5. 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)
4.5.1. 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
4.5.2. 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,.
4.5.3. 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.
* 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.
4.5.4. Outgoing condition Configuration
■ When pressing IN-STOP key by SVC remote control, Red
LED are blinked alternatively. And then automatically turn
off. (Must not AC power OFF during blinking)
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
CD
Block 1
5B (HDMI1)
-
4B (HDMI2)
3B (HDMI3)
3B (HDMI3)
Input
Model name(HEX)
HDMI1
65030C001000
HDMI2
65030C002000
HDMI3
65030C003000
CMD LENGTH
ADH
ADL DATA_1 . . . Data_n
CS
DELAY
Adjust mode
CMD(hex)
LENGTH(hex)
Description
EEPROM WRITE
A0h
84h+n
n-bytes Write (n = 1~16)
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TROUBLE SHOOTING
1. Check the booting Voltage
Make sure the Stand - by Voltage
P403 9~12pin : +3.5V_ST
Make sure the Micom voltage
L404 : +3.5V_ST
Make sure the CLK of X201
Is 24MHz
Make sure the PWR_ON of P403
1pin : 3.3V
Make sure the Multi Voltage
P403 2pin : 24V, 17pin : 12V
Make sure the Output Voltage of IC 402/3/7
IC402 : 2.5V, IC403: 1.1V, IC407 : 1.5V, Q403 : 3.3V
Make sure the Power
Connector
Make sure the disconnection
of Main board 3.5V circuit
Exchange the
Circuit board
Make sure the voltage of LVDS Power
Q409 : 12V
Make sure the output of MSTAR LVDS
Make sure the Inverter control and error
P403 18pin : High, 24pin : Low
Exchange the LCD Module
Exchange the L404
Exchange the X201
Re- download of Firmware
Exchange the circuit board
Exchange the IC402/3/7,
Q403
Exchange the Q409
Exchange the Mstar(IC101)
or Main board
Exchange the circuit or
check the LCD module
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Exchange the Mstar(IC101)
Or Main board
Check the Stand - by Voltage
P403 9~12pin : +3.5V_ST
Check the Tuner 3.3V
; L3703
Check the Tuner 1.8V
IC3703 2pin : 1.8V
Check the IF_P/N signal
TU3704 10/11pin
Check the LVDS output signal of Mstar IC
Exchange the L3703
Exchange the IC3703
Exchange the Tuner
Exchange the Mstar(IC101)
Or Main board
No
No
No
No
Yes
Yes
Yes
Yes
2. Digital TV Video
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3. Analog TV Video
Check the RF cable and RF signal
Check the Tuner 3.3V
; L3703
Check the Tuner 1.8V
IC3703 2pin : 1.8V
Check the CVBS signal
TU3704 8pin
Check the LVDS output signal of Mstar IC
Exchange the L3703
Exchange the IC3703
Exchange the Tuner
Exchange the Mstar(IC101)
Or Main board
No
No
No
No
Yes
Yes
Yes
Yes
4. AV Video
Make sure the input signal type and
Our TV can support the signal
Check the AV cable defect or
status of conductor
Make sure the JK1604, CVBS signal
Make sure the CVBS_DET signal
Make sure the LVDS output signal of Mstar IC
Exchange the AV Jack
Exchange the R1660
Exchange the Mstar(IC101)
Or Main board
No
No
No
Yes
Yes
Yes
Yes
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6. HDMI Video
Make sure the input signal type and
Our TV can support the signal
Check the HDMI cable defect or
status of conductor
Check the EDID, I2C signal
R884 ~ R891
Check the HDMI Jack
JK801, JK802, JK803
Check the HDMI_DET(HPD) signal
Exchange the IC or download
The EDID data
Exchange the HDMI Jack
Exchange the Resistor
R830, R828, R862
No
No
No
Yes
Yes
Yes
Yes
Check the voltage of HDCP EEPROM /I2C
Signal : IC103
Exchange the defective IC
No
Yes
Check the HDMI signal
No
Yes
Exchange the Mstar(IC101)
Or Main board
Check the LVDS signal output
Yes
Exchange the Mstar(IC101)
Or Main board
No
5. RGB Video
Make sure the input signal type and
Our TV can support the signal
Check the RGB cable defect or
status of conductor
Check the EDID, I2C signal
R1141, R1143(SDA, SCL)
Check the JK1104 H / V_Sync / R / G / B
signal
Check the DSUB_DET signal
Download the EDID data,
Exchange the Mstar(IC101)
Or Main board
Exchange the D - SUB Jack
Exchange the resistor
R1146 / R1147
No
No
No
Yes
Yes
Yes
Yes
Check the LVDS output signal of Mstar IC
Exchange the Mstar(IC101)
Or Main board
No
Yes
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