Technical description and composition of the GOLDSTAR LT-42A320F TV, panel type and modules used. The composition of the modules.GoldStar LED
Model: LT-42A320F
Chassis / Version: MS82S V3L10 V3L11
Panel: LVF420AUBK
LED driver (backlight): 40RT4611-DRB2XG
PWM LED driver: MAP3204T
MOSFET LED driver: AOD4454
Power Supply (PSU): 40E421C5-PWB1XG
MainBoard: 40-MS82S0-MAD2XG (H)
IC MainBoard: MST6E182VS-LF, 25Q32A-100HIP, 24C64, K4T51163QT-BCF7, IT6633E-P, TPA3110D2
Tuner: F35WT-3-E
LT-42A320F Specifications
GOLDSTAR LT-42A320F
General recommendations for TV LCD LED repair
Possible manifestations of malfunctions
- TV GoldStar LT-42A320F does not turn on and does not show any signs of turning on, does not respond to control buttons and to the remote control.
Most often, with similar manifestations, the main power module 40E421C5-PWB1XG turns out to be faulty. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches and rectifier diodes for possible partial or complete breakdown.
In case of breakdowns of semiconductors in the secondary circuits, the converter can usually work in an emergency in the short-circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse often breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements, which can disable it in key mode, or provoke an excess of the maximum current or voltage values. These can be circuits supplying a PWM controller, damper or frequency setting circuits, or OOS (negative feedback) elements in the stabilization circuit. PWM controllers (PWM), in the absence of external damage and a short circuit between the terminals, are checked by replacing them with a known good one.
- There is no image, there is sound, it reacts to the remote control, the channels are switched. In some cases, the image appears when turned on and disappears immediately.
A malfunction is usually in these cases most likely in the backlight units of the display matrix. The reason may be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
It is impossible to check the LED bars for a break without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts is required, and ideally a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters tend to light one 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as an indicator of serviceability. In faulty LEDs, the zener diode will either be cut off, or pierced in the K / Z.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals the standby mode.
If the TV operates normally from external devices, but does not tune to TV channels, the F35WT-3-E tuner may be faulty. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the reason for the inoperability of the tuner may be a software failure.Repair or diagnostics of the 40-MS82S0-MAD2XG motherboard should begin with checking the stabilizers and power converters required to power the microcircuits and matrix. If necessary, you should update or replace the software (software). Complicated repair of MB (SSB) board is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements MST6E182VS-LF, 25Q32A-100HIP, 24C64, K4T51163QT-BCF7, IT6633E-P, TPA3110D2. BGA chip faults are usually easy to detect by warm-up.
Attention! Users and owners of LT-42A320F TVs who do not have the appropriate qualifications, knowledge and experience are strongly discouraged from attempting to repair themselves in order to avoid negative consequences that can lead to complete non-repairability of the device.
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> GoldStar LT-42A320F MS82S V3L10 V3L11, Main: 40-MS82S0-MAD2XG (H), Panel: LVF420AUBK
The appearance of the MainBoard 40-MS82S0-MAD2XG is shown in the figure below:40-MS82S0-MAD2XG
40-MS82S0-MAD2XG can be used in TVs:
ERISSON 23LET70 (Panel LTA230AP01), GOLDSTAR 32A340R (Panel LVW320SSTM E1), GoldStar LT-42A320F (Panel LVF420AUBK), MYSTERY MTV-3225LW (Panel LVM320CSTME13V4), MYSTERY MTV-4019LW (Panel LVF390CMTM E13 V5), MYSTERY MTV-3219LW (Panel LVW320CSTME18 V2), TCL 40D3200 (Panel LTA400HM13 ), TCL 39D3320 39D3320F (Panel LVF390CMTM E13 V2), TCL 39E5000F3D (Panel V390HK1-LS5), THOMSON T39ED33HU (Panel LVF390CMTME15V2), THOMSON T32ED33U (Panel LSC320AN01-C06), THOMSON T32E32U (Panel LVW320SSTT E1).
Main features of the GOLDSTAR LT-42A320F device:
Installed matrix (LED panel) LVF420AUBK.
To power the backlight LEDs, the 40RT4611-DRB2XG LED driver is used, controlled by the MAP3204T PWM controller. AOD4454 type keys are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the GOLDSTAR LT-42A320F TV is carried out by the 40E421C5-PWB1XG power module, or its analogs.
MainBoard - the main board (motherboard) is a 40-MS82S0-MAD2XG module, using the MST6E182VS-LF, 25Q32A-100HIP, 24C64, K4T51163QT-BCF7, IT6633E-P, TPA3110D2 and others.
The F35WT-3-E tuner provides reception of television programs and tuning to channels.
TV GOLDSTAR LT-42A320F with LCD LVF420AUBK, 42 "(107 cm) diagonal 16: 9. The required screen brightness of 400 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 80000: 1 is achieved by special control of the LEDs. The LED panels of this TV are equipped with edge LED backlighting.The design and technical capabilities of the TV provide viewing of broadcasts and films in high quality HD at a resolution of 1920x1080 pixels in graphic resolution according to the standard 1080p (Full HD) .Input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC Graphic processing and digital signal formation is performed in 480i, 480p, 576i, 576p, 720p, 1080i, 1080p standards Supported multimedia file formats: MP3, MPEG4, JPEG.
The power of the acoustic sound system is 16 W (2x4 + 8 W) provided by 3 speakers. The NICAM STEREO audio processing system is used.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, component, VGA, HDMI x2, USB x2. A headphone output is provided. To connect a computer or laptop to this TV model, use the VGA (D-Sub 15) connector on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768.
The power consumed by the TV operating in mains mode is 140 W.
Dimensions: without stand 1013x639x47 mm.
TV weight: without stand: 15 kg.
Attention! Panel LVF420AUBK LED TV GOLDSTAR LT-42A320F is an expensive and unreliable element.
Do not allow any impact on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV unrepairable.