Technical description and composition of the LG 26LD320 TV, panel type and applicable modules. The composition of the modules.LG
Model: 26LD320
Chassis / Version: LD91A / G
Panel: T260XW04 V.3
Inverter (backlight): VIT71886.00 REV.2 LOGAH
PWM Inverter: OZ964SN, AS324M-G1
MOSFET Inverter: P2904BD, P4004ED
Power Supply (PSU): EAX62106801 / 1 LGP26-10PI
PWM Power: ICE3BR1765 (Standby), HS01G (PFC), L6599D
MOSFET Power: K5A60D, K13A60D
MainBoard: EAX60686904 EBR66234903
IC MainBoard: MP2212DN, 25X32VSIG, LCX244, MP2305DS, LVC541A, LGE3368A-LF-SF, MAX3232C, LM324DG, LGE2001S, 24C08WI, NTP-3100L
Tuner: TDFW-G235D
Specifications 26LD320
LG 26LD320
General recommendations for repairing TV LCD
Possible manifestations of defects
- LG 26LD320 TV does not turn on. There are no signs of operability. The indicators on the front panel do not light or flash, the TV does not respond to the remote control and control buttons.
In some of these cases, the main switching power supply, the EAX62106801 module, is faulty. It is necessary to verify the presence of its output voltages and, if they are completely absent, check the power switches (K5A60D, K13A60D) and rectifier diodes for possible short circuit.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short-circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the main fuse and, less often, the current sensor at the source of the key most often breaks.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback circuits (OOS) of stabilization. PWM controllers (PWM) ICE3BR1765 (Standby), HS01G (PFC), L6599D, if they do not have visible damage to the case and open fault between the terminals, are usually checked by replacement.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
These manifestations can be triggered by a power module, or by defects in the inverter, as well as a distortion of the currents in the lamps due to their uneven wear. If all the electrolytic capacitors of the filter according to the inverter power supply are serviceable, you should make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required when working, and after they are finished, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the EAX60686904 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 - MP2212DN, 25X32VSIG, LCX244, MP2305DS, LVC541A, LGE3368A-LF-SF, MAX3232C, LM324DG, LGE2001S, 24C08WI, NTP-3100L. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
Before replacing the TDFW-G235D tuner, if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Owners and users of the LG 26LD320 TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
Service manual and schematic diagram ----------------------> LG 26LD320 Chassis LG91A 26LD320, 26LD320C, 26LD320N, 26LD335 -ZA
The appearance of the MainBoard EAX60686904 is shown in the figure below:EAX60686904
EAX60686904 can be used in TVs:
LG 32LD320 (Panel T315XW03 V1), LG 32LD320-ZA (Panel T315XW03), LG 32LH4000-ZA (Panel LC320WUN), LG 32LH2000 (Panel LK315T3LA57), LG 32LH2010 (Panel LK315T3LA57), LG 32LF2510 ZB (Panel LC320WUN (SA)(B3)), LG 37LH2000 (Panel LC370WXE (SB)(A1)), LG 19LD320 ZA (Panel M185B1-L02 Rev.C3), LG 26LH2000 (Panel T260XW02 V.R), LG 32LG2100 (Panel LC320WXN), LG 22LH2000 ZA (Panel V216B1-L02), LG 42LH2000 ZA.ARUVLH (Panel LC420WXE (SB)(A1)), LG 32LD321 32LD321-ZB (Panel T315XW03 V1), LG 26LD320 (Panel T260XW04 V.3), LG 19LH2000 19LH2000-ZA (Panel M185B1-L03).
The appearance of the power supply
Main features of the device LG 26LD320:
Installed matrix (LCD panel) T260XW04 V.3.
To power the backlight, the inverter VIT71886.00 is used, it is controlled by the PWM controller OZ964SN, AS324M-G1. As power elements of the inverter, keys of the type P2904BD, P4004ED are used.
The necessary supply voltages for all nodes of the LG 26LD320 TV are generated by the EAX62106801 power supply module or its analogs using ICE3BR1765 (Standby), HS01G (PFC), L6599D microchips and power switches of the K5A60D, K13A60D type.
MainBoard - the main board (motherboard) is an EAX60686904 module using MP2212DN, 25X32VSIG, LCX244, MP2305DS, LVC541A, LGE3368A-LF-SF, MAX3232C, LM324DG, LGE2001S, 24C08WI, NTP-3100L and other chips.
The TDFW-G235D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T260XW04 V3
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1366x768, WXGA
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 575.769x323.712 mm
Surface: Antiglare (Haze 13%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V