Technical description and composition of the GOLDSTAR LT-32A340R TV, panel type and modules used. The composition of the modules.GOLDSTAR LED
Model: LT-32A340R
Chassis / Version: V1L11
Panel: LVW320CSTM E3 V1
LED backlight: Edge LED 67-H93402-0A0
LED driver (backlight): 40-RT3210-DRF2XG
PWM LED driver: MAP3204
MOSFET LED driver: TK8P25DA
Power Supply (PSU): 40-P081C0-PWD1XG
PWM Power: VIPER17L, FAN6754
MainBoard: 40-MS82S0-MAD2XG MS82S
IC MainBoard: CPU: MST6E182VS-LF, SPI FLASH: 25Q32, EEPROM: 24C64
Tuner: F35WT-3-E
Control: IR: RC3000M13
LT-32A340R Specifications
GOLDSTAR LT-32A340R
General recommendations for TV LCD LED repair
Possible malfunctions
- GOLDSTAR LT-32A340R does not turn on, indicators on the front panel are not lit or blinking. The TV does not respond to the control buttons and the remote control.
In some of these cases, the fault is detected in the 40-P081C0-PWD1XG power module. Its output voltages should be measured and, in their absence, the power switches and rectifier diodes should be checked for the probability of a short circuit in the converters.
In case of breakdowns in the secondary circuits, the converter can operate in a short-circuit mode, and in case of a short circuit in the elements of the primary circuit, the mains fuse is usually cut off.
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 the PWM controller, damper or frequency setting circuits, or OOS (negative feedback) elements in the stabilization circuit. PWM controllers (PWM) VIPER17L, FAN6754, in the absence of external damage and a short circuit between the terminals, are checked by replacing them with known good ones.
- There is no picture, but there is sound and all other functions work. Sometimes when you turn it on, the image appears and disappears for a second.
The malfunction in most of such cases is found in the nodes and elements of the LED panel backlight. The reason for this may be an open circuit in the LED circuit, or a problem in stabilizing their power supply.
To check the health of the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can check each LED separately with a simple Chinese multimeter (powered by 9 volts) in the P-N transition test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black one to its cathode, then the 3-volt LED will light up slightly, and in the opposite direction you can detect the transition of the emergency zener diode. The serviceability of the PN junction of the Zener diode indirectly indicates the serviceability of the LED-a
- The TV does not go into operation, does not respond to the remote control. The indicator on the front panel is on or blinking.
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 MB (SSB) repair is possible only in the conditions of a service center with the necessary equipment. Checking or replacing CPU elements: MST6E182VS-LF, SPI FLASH: 25Q32, EEPROM: 24C64 requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by the warm-up method.
Before changing the F35WT-3-E tuner, if it is not possible to tune to TV channels, you should make sure that there are supply voltages, which must be measured at the corresponding tuner terminals and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be monitored with an oscilloscope
Attention to users! Self-repair of the GOLDSTAR LT-32A340R TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> EEPROM GOLDSTAR LT-32A340R V1L11, Main: 40-MS82S0-MAD2XG MS82S, Panel: LVW320CSTM E3 V1
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).
External view of the power supply
Main features of the GOLDSTAR LT-32A340R device:
Installed matrix (LED-panel) LVW320CSTM E3 V1.
The LED driver 40-RT3210-DRF2XG is used to power the backlight LEDs and is controlled by the MAP3204 PWM controller. TK8P25DA keys are used as power elements of the LED driver.
The formation of the required supply voltages for all nodes of the GOLDSTAR LT-32A340R TV is carried out by the 40-P081C0-PWD1XG power module, or its analogs using VIPER17L, FAN6754 microcircuits.
MainBoard - the main board (motherboard) is a 40-MS82S0-MAD2XG module, using CPU chips: MST6E182VS-LF, SPI FLASH: 25Q32, EEPROM: 24C64 and others.
The F35WT-3-E tuner provides reception of television programs and tuning to channels.
TV GOLDSTAR LT-32A340R with LCD LVW320CSTM, 32 "(81 cm) 16: 9. The LED panels of this TV are equipped with edge LED backlighting.It is possible to view images in high quality HD at a resolution of 1366x768 pixels in a graphic resolution of 720p (HD Ready) .Input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC Graphic processing and digital signal shaping takes place in 480i, 480p, 576i, 576p, 720p, 1080i, 1080p standards Supported multimedia file formats: MP3, MPEG4, DivX, JPEG.
Speaker power 16 W (2x8 W) is provided by two 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, audio x2, component, VGA, HDMI x3, USB. 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 70 W.
Overall dimensions: 731x491x183 mm.
TV weight: 8.3 kg.
Attention! Panel LVW320CSTM E3 V1 LED TV GOLDSTAR LT-32A340R 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.