Technical description and composition of the LG 24MT45V TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 24MT45V LG 24MT45V-PZ
Chassis / Version: LD41A
Panel: V236BJ1-LE2 Rev. C1
LED backlight: LG Innotek 23.6 inch Rev0.1
LED driver (backlight): integrated into MainBoard
PWM LED driver: DT1641AS
MOSFET LED driver: SMK630D
Power Supply (PSU): Adapter 19V
MainBoard: EAX65377507 (1.0)
IC MainBoard: LGE2134, AT24C256C, MX25L8006E, H27U1G8F2CTR-BC, BA7657F, TAS5733, AOD478
Tuner: EBL61400501 TDJM-G101D
Technical Specifications 24MT45V
LG 24MT45V
General repair guidelines for TV LCD LED
Possible malfunctions
- LG 24MT45V does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
In such cases, the adapter power supply is usually faulty.
The external adapter 19V power supply is not always subject to repair, especially since the owner can purchase it independently. But, in some cases, it makes sense to open it and eliminate the simple typical defects inherent in converters in pulsed sources. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches and rectifier diodes of the converters for a probable short circuit.
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key more often breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM microcircuits are usually checked by replacement with new ones, or obviously working.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
As a rule, in such cases there is no display backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the EAX65377507 motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). Sometimes it is necessary to check or replace (if necessary) the elements of the MainBoard board - LGE2134, AT24C256C, MX25L8006E, H27U1G8F2CTR-BC, BA7657F, TAS5733, AOD478. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
If there is no reception of television channels, but the TV is working properly from external devices, first of all you need to check the voltage of the tuner EBL61400501 TDJM-G101D and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Attention to users! Self-repair of the LG 24MT45V TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
Service manual and schematic diagram LG 24MT45V Chassis LD41A.
FIRMWARE SPI FLASH, EEPROM LG 24MT45V LD41A, Main: EAX65377507 (1.0), Panel: V236BJ1-LE2 Rev.C1
The appearance of the MainBoard EAX65377507 is shown in the figure below:EAX65377507
EAX65377507 can be used in TVs:
LG 28LB450U ZB (Panel 328041563 Kenmos), LG 24LB450U ZB (Panel V236BJ1-LE2 REV.C1), LG 24MT45V LG 24MT45V-PZ (Panel V236BJ1-LE2 Rev.C1), LG 24LB457U (Panel V236BJ1-LE2 Rev.C1), LG 22MT55V 22MT55V-PZ (Panel LM215WF3 (SL)(K1)), LG 22LB450U (Panel 1366x768 HD).
Main features of the device LG 24MT45V:
Installed matrix (LED-panel) V236BJ1-LE2 Rev. C1.
To power the backlight LEDs, a converter is used, combined with the main board EAX65377507, controlled by the DT1641AS PWM controller. As power elements of the LED driver, keys of the SMK630D type are used.
To power all the internal components of the LG 24MT45V TV, an external adapter 19V type source is used.
MainBoard - the main board (motherboard) is an EAX65377507 module, using chips LGE2134, AT24C256C, MX25L8006E, H27U1G8F2CTR-BC, BA7657F, TAS5733, AOD478 and others.
The tuner EBL61400501 TDJM-G101D provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: V236BJ1-LE2
Type: a-Si TFT-LCD, Panel
Diagonal size: 23.6 inch
Resolution: 1366x768, WXGA
Display Mode: Super MVA, Normally Black, Transmissive
Active Area: 521.471x293.184 mm
Surface: Antiglare (Haze 1%), Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8.5 (G to G)
Frequency: 60Hz
Lamp Type: WLED Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V