REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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Tuesday 1 September 2020

REPAIRING / SERVICING TV GOLDSTAR 32A340R

Technical description and composition of the GOLDSTAR 32A340R TV, panel type and modules used. The composition of the modules.
GOLDSTAR LED
Model: 32A340R
Chassis / Version: V1L05
Panel: LVW320SSTM E1
LED driver (backlight): 40-RT3210-DRF2XG
PWM LED driver: MAP3204
MOSFET LED driver: TK8P25DA
Power Supply (PSU): 40-P081C0-PWD1XG (08-PE081C0-PW200AA)
PWM Power: VIPER17L, FAN6754
MainBoard: 40-MS82S0-MAD2XG
IC MainBoard: MST6E182VS-LF, 25Q32A-100HIP, 24C64, K4T51163QT-BCF7, IT6633E-P, TPA3110D2
Tuner: F35WT-3-E
LT-32A340R Specifications
GOLDSTAR 32A340R
General recommendations for TV LCD LED repair
Possible malfunctions
- The GOLDSTAR 32A340R TV does not turn on at all. Control lamps do not light up or blink. The TV on the remote control and control panel buttons does not respond.
In some of these cases, the fault is detected in the 40-P081C0-PWD1XG power module. It is necessary to measure the output voltages in its secondary circuits, and if they are completely absent, the serviceability of the power switches and rectifier diodes should be checked for a possible breakdown (short circuit).
In case of breakdowns in the secondary circuits of the converter, it can usually work in an emergency mode in a short circuit mode, and with a short circuit in the power elements of the primary circuit, the mains fuse or current sensor in the source of the key is most often cut off.
Breakdown of Mos-Fet switches used in switching power supplies is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency setting or damper circuits, as well as in negative feedback stabilization. PWM microcircuits (PWM) VIPER17L, FAN6754 are usually checked by replacing them with new ones, or knowingly working.
- There is no picture, but there is sound and reaction to commands from the remote control. Or the image appears immediately after switching on and disappears.
In some of these cases, the malfunction is caused by the lack of display backlighting. 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.
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). In cases of complex MB (SSB) repairs and with the necessary skills and equipment, it may sometimes be necessary to replace its chips MST6E182VS-LF, 25Q32A-100HIP, 24C64, K4T51163QT-BCF7, IT6633E-P, TPA3110D2 and other possible faulty components. Failures associated with BGA soldering technologies are usually easily diagnosed by the warm-up method.
In cases where there is no tuning for terrestrial or cable TV channels, you should make sure that the software is correct, as well as that the supply voltages on the terminals of the F35WT-3-E tuner match. It is also necessary to check with an oscilloscope the presence of pulses of data exchange between the tuner and the processor via the I2C bus.
Attention to users! Self-repair of the GOLDSTAR 32A340R TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
DOWNLOAD FIRMWARE FOR SPI FLASH  ----------->   GOLDSTAR 32A340R V1L05, Main: 40-MS82S0-MAD2XG, Panel: LVW320SSTM E1

Possible other versions of  GOLDSTAR 32A340R:

DOWNLOAD FIRMWARE FOR SPI FLASH  ----------->   GOLDSTAR 32A340R V1L11, MainBoard: 40-MS82S0-MAD2XG, Panel: LVW320CSTME3V1

DOWNLOAD FIRMWARE FOR SPI FLASH  ----------->   GOLDSTAR 32A340R V1N02, MainBoard: 40-MS82S0--MAD2XG. Panel: LVW320NEAL CJHW00 V6, T-CON: MT3151A04-1-XC-9, LED-Driver Backlight: 40-RT3210-DRF2XG



https://4.bp.blogspot.com/-36N-PdjBCjg/X0zu2q1XdwI/AAAAAAABFE0/LFbN6x7-_Kw_7aUSNr8UYWvEU8RXP-BggCK4BGAYYCw/s1600/40-MS82S0-MAD2XG_DCE.jpg
 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 32A340R device:
Installed matrix (LED-panel) LVW320SSTM E1.
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 necessary supply voltages for all nodes of the GOLDSTAR 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 microcircuits 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-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.
Posted By: FRANK at 06:14
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