LG 42LM6400 CA TV Service menu

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LG LED LCD TV 42LM6400 & 42LM6400-CA

CHASSIS MODEL: LC22E

CAUTION!
BEFORE SERVICING THE CHASSIS or ACCESS THE FACTORY MODE,
READ THE SAFETY PRECAUTIONS IN YOUR SERVICE MANUALS.

1. Application Range LG LED LCD TV 42LM6400 & 42LM6400-CA
This specification sheet is applied to all of the LED LCD TV with LC22E chassis.
2. Designation
(1) ecause this is not a hot chassis, it is not necessary to use an isolation transformer. However, the use of isolation transformer will help protect test instrument.
(2) Adjustment must be done in the correct order.
(4) The input voltage of the receiver must keep 100~240V, 50/60Hz.
(5) The receiver must be operated for about 5 minutes prior to
the adjustment when module is in the circumstance of over 15.
In case of keeping module is in the circumstance of 0 °C, it should be placed in the circumstance of above 15 °C for 2 hours In case of keeping module is in the circumstance of below -20°C, it should be placed in the circumstance of above 15 °C for 3 hours.
(3) The adjustment must be performed in the circumstance of 25 ±5 C of temperature and 65±10% of relative humidity if there is no specific designation.
Cauti on) When still image is displayed for a period of 20 minutes or longer (especially where W/B scale is strong.
Digital pattern 13ch and/or Cross hatch pattern 09ch), there can some afterimage in the black level area.

3. Adjustment items LG LED LCD TV 42LM6400 & 42LM6400-CA
3.1 Main PCB check process
MAC Address Download
Wide-Vine Key Download
Adjust 1920*1080 Compl
Adjust 1920*1080 RGB
EDID/DDC download
Above adjustment items can    also performed in Final Assembly if needed. Both Board-level and
Final assembly adjustment items can be check using in-Start Menu.
1.ADJUST CHECK.

3.2. Final assembly adjustment
White Balance adjustment
RS-232C functionality check
PING Test
Factory Option setting per destination
Ship-out mode setting (In-Stop)

3.3. Etc
▪Ship-out mode
▪Service Option Default
▪USB Download(S/W Update, Option, Service only)
▪ISP Download(Option)

4.Automatic Adjustment LG LED LCD TV 42LM6400 & 42LM6400-CA
 Enter Service Mode by pushing “ADJ” key,
 Enter ADC mode by pushing “► key at “8. ADC Calibration”
 There are 2 ways for ADC Calibration. ( OTP, External )
*. OTP mode
: Automatic ADC Calibration. (Internal ADC Calibration) On the
manufacture line, OTP is used for ADC Calibration automatically.
*. External mode
: Manual ADC Calibration. When OTP mode is failed, ADC
calibration should be “OK” by using External mode.

4.1. Final assembly adjustment
1. Change the ADC type “OTP” by using “►”key.
2. Enter “Start” key.
3. Check the sign “OK” below ADC type.
4.1.2 External ADC Adjustment

Overview
ADC adjustment is needed to find the optimum black level and gain
in Analog-to-Digital device and to compensate RGB deviation.
Equipment & Condition
1) USB to RS-232C Jig
2) MSPG-925 Series Pattern Generator(MSPG-925FA, pattern -65)
- Resolution: 1080P Comp1
1920*1080P RGB
- Pattern : Horizontal 100% Color Bar Pattern
- Pattern level : 0.7±0.1 Vp-p
- Image
Adjustment method
▪ Using USB, adjust items listed in 3.1 in the other shown in “4.1.3.3”

4.3 Model name & Serial number
Download
4.3.1 Model name & Serial number D/L
b. check the menu on in-start
5. Manual Adjustment
5.1. ADC adjustment is not needed because\
of OTP(Auto ADC adjustment)
5.2. EDID (The Extended Display Identification
Data) / DDC (Display Data Channel)
download
5.2.1 Overview LG LED LCD TV 42LM6400 & 42LM6400-CA
It is a VESA regulation. A PC or a MNT will display an optimal resolution through information sharing without any necessity of user input. It is a realization of “Plug and Play”.
5.2.2 Equipment
▪ Since embedded EDID data is used, EDID download JIG,
HDMI cable and D-sub cable are not need.
▪ Adjust remocon
5.2.3 Download method
1) Press Adj. key on the Adj. R/C, then select “12.EDID D/L”.
By pressing Enter key, enter EDID D/L menu.
2) Select [Start] button by pressing Enter key, HDMI1 / HDMI2 / HDMI3
/ HDMI4 / RGB are Writing and display OK or NG.
 Press “Power on” key of service remocon.(Baud rate :
115200 bps)
 Connect RS-232C Signal to USB Cable to USB.
 Write Serial number by use USB port.
 Must check the serial number at Instart menu.
4.3.2 Method & notice
A. Serial number D/L is using of scan equipment.
B. Setting of scan equipment operated by Manufacturing Technology Group.
C. 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.
a. Press the ‘instart’ key of ADJ remote controller.
b. Go to the menu ‘5.Model Number D/L’ like below photo.
c. Input the Factory model name(ex 47LM6200-CC) or Serial
number like photo.

LG LED LCD TV 42LM6400 CA TV Service menu

Photo credit : meddiodesign.com

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Universal Remote - Service Mode - TV Factory menu codes

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LG 42LM6400 CA TV Service menu (All TV Service Menu Code)

5 stars - "LG 42LM6400 CA TV Service menu" by Admin 2 LG LED LCD TV 42LM6400 & 42LM6400-CA, Above adjustment items can also performed in Final Assembly if needed. Both Board-level and Final assembly adjustment items can be check using in-Start Menu. 1.ADJUST CHECK. Written on April 12, 2020