Technical description and composition of the GOLDSTAR LT-32T450R TV, panel type and modules used. The composition of the modules.GOLDSTAR LED
Model: LT-32T450R
Chassis / Version: 5800-A6M31G-0P10
Panel: LC320DXJ-SFA2
LED backlight: 5800-W32001-3P00 J02K03947A
LED driver (backlight): integrated into MainBoard
PWM LED driver: MP3398A
MOSFET LED driver: AOD4286
Power Supply (PSU): integrated into MainBoard
PWM Power: LNK6778K
MainBoard: 5800-A6M31G-0P10 VER: 00.01
IC MainBoard: SPI Flash: 25Q64CSIG, SOUND: TPA3113D2
Tuner: DVB-T2 & SAT
LT-32T450R Specifications
GOLDSTAR LT-32T450R
General recommendations for TV LCD LED repair
Possible manifestations of malfunctions
- The GOLDSTAR LT-32T450R TV does not turn on at all. No response to the remote control and front panel control buttons. Indicator lamps do not light up or flash.
In such cases, the common power supply is often faulty - the AC / DC converter of the mains voltage, which is combined with the elements of the 5800-A6M31G-0P10 main board. 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, as a rule, can operate in an emergency in the short-circuit mode, and in case of a short circuit in the power 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 a PWM controller, damper or frequency setting circuits, or OOS (negative feedback) elements in the stabilization circuit. PWM controllers (PWM) LNK6778K, in the absence of external damage and short circuit between the terminals, are checked by replacing them with known good ones.
- No picture, sound, all other TV functions are working. When turned on, the image may sometimes appear for a second.
Usually, in such cases, a malfunction is detected in the LED panel backlight nodes. Usually the cause of the malfunction is in the breakage of the LEDs, or in the connectors of the LED strips, but sometimes the LED driver is also faulty.
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 turn on, the indicator signals the standby or operating mode, or blinks.
Repair or diagnostics of the 5800-A6M31G-0P10 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). Complex repair of MB (SSB) is possible only in a service center with the necessary equipment. Checking or replacing SPI Flash: 25Q64CSIG, SOUND: TPA3113D2 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 replacing the DVB-T2 & SAT tuner, if there is no tuning to the channels, you must first check the software and the supply voltage at its outputs. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Attention to users! Self-repair of the GOLDSTAR LT-32T450R TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> GOLDSTAR LT-32T450R, Main: 5800-A6M31G-0P10 VER:00.01, Panel: LC320DXJ-SFA2
MainBoard 5800-A6M31G-0P10 is shown in the figure below:5800-A6M31G-0P10
5800-A6M31G-0P10 can be used in TVs:
AIWA 32LE4020 (Panel LC320DXJ-SHA2 GDL320HY (LD0-008) Rev.00), AIWA 32LE7020 (Panel LC320DXJ (SH)(A2)), ERISSON 32LES71T2 (Panel LC320DXJ-SFA2), ERISSON 32LES70T2 (Panel LC320DXJ (SF)(A2)), SUPRA STV-LC32T650WL (Panel LC320DXJ-SFA2 RDL320HY(LD0-803)45).
Main features of the GOLDSTAR LT-32T450R device:
Installed matrix (LED panel) LC320DXJ-SFA2.
To power the backlight LEDs, a converter combined with the 5800-A6M31G-0P10 main board is used, controlled by the MP3398A PWM controller. The keys of the AOD4286 type are used as power elements of the LED driver.
The power module is combined with the MainBoard and is made according to the AC / DC flyback voltage converter using LNK6778K microcircuits.
MainBoard - the main board (motherboard) is a 5800-A6M31G-0P10 module, using SPI Flash chips: 25Q64CSIG, SOUND: TPA3113D2 and others.
The DVB-T2 & SAT tuner provides reception of television programs and tuning to channels.
GOLDSTAR LT-32T450R LCD TV LC320DXJ-SFA2, 32 "(81 cm) 16: 9. The required screen brightness of 300 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 120,000: 1 is achieved by special LED control The technology of production of the screen of this TV model is realized with LED backlighting.It is possible to view images in high quality HD at a resolution of 1366x768 pixels in the standard graphic resolution 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, WMA, MPEG4, MKV, JPEG.
Speaker power 12 W (2x6 W) is provided by two speakers. The NICAM STEREO audio processing system is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), SCART, HDMI, MHL, USB. A headphone output is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector on the TV case is used, this interface supports resolutions: 640x480, 800x600, 1024x768, 1360x768.
The digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2, DVB-S2 standards.
Overall dimensions: 814x491x142 mm.
Attention! Panel LC320DXJ-SFA2 LED TV GOLDSTAR LT-32T450R 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.