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 28 April 2020

REPAIR / SERVICING TV HYUNDAI H-LCD3212

Technical description and composition of the HYUNDAI H-LCD3212 TV, panel type and applicable modules. The composition of the modules.
Hyundai
Model: H-LCD3212
Chassis / Version: T.MT8223.3B
Panel: LTA320AP02
Inverter (backlight): SSI320_4UA01
PWM Inverter: OZ9966SN
MOSFET Inverter: STU432S, KMB054N40DB
Trans Inverter: LT-U3208
Power Supply (PSU): LK-OP416001A
PWM Power: FAN7530 (PFC), L6599AD (PWM Resonant), OB2273 (PWM SOT23-6)
MainBoard: T.MT8223.3B
IC MainBoard: SPI FLASH: W25Q16, EEPROM: 24C32
Tuner: F20WT-3DDR-E
Technical Specifications H-LCD3212
HYUNDAI H-LCD3212
General recommendations for repairing TV LCD
If the HYUNDAI H-LCD3212 does not turn on, no control lights on the front panel are on or blinking, only the standby power regulator or processor may be faulty. Diagnostics and repair of the common power supply should always begin with a check of the mains fuse and the condition of the electrolytic capacitors of the secondary rectifier filters. Defective and swollen capacitors should be replaced with new ones. If the fuse breaks, it is advisable to check for a breakdown, first of all, all the power semiconductor elements of the converter and the diode bridge of the rectifier network, as well as the large electrolytic capacitor of the filter of the rectifier network.
If there is no image when you turn on the HYUNDAI H-LCD3212, or it appears for a second and disappears completely, but there is sound, most likely either the backlight or their power converter (inverter) are faulty. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the general power supply unit. Turning off the protection for diagnostic purposes, it must be remembered that in this case there is a risk of failure of the power elements of the inverter. Upon completion of the diagnosis, all regular protection circuits should be restored.
Repair or diagnostics of the T.MT8223.3B motherboard should begin by checking the stabilizers and converters needed to power the chips and matrix. If necessary, you should update the software (software).
The malfunction of the F20WT-3DDR-E tuner is established after checking the software and all the supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
It should be remembered! Attempts to repair the HYUNDAI H-LCD3212 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
Repair MainBoard
The appearance of MainBoard T.MT8223.3B is shown in the figure below:
T.MT8223.3B
T.MT8223.3B can be used in TVs:
HYUNDAI H-LCD3210 (Panel LTA320AP02), HYUNDAI H-LCD3212 (Panel LTA320AP02), SUPRA STV-LC2622W (Panel M260TWR1).
The appearance of the power supply
Main features of the device HYUNDAI H-LCD3212:
Installed matrix (LCD-panel) LTA320AP02.
To power the backlight, an SSI320_4UA01 inverter is used, controlled by the OZ9966SN PWM controller. A transformer LT-U3208 is installed in the inverter converter. As power elements of the inverter, keys of the STU432S, KMB054N40DB type are used.
The necessary supply voltages for all nodes of the HYUNDAI H-LCD3212 TV are generated by the LK-OP416001A power module or its analogs using FAN7530 (PFC), L6599AD (PWM Resonant), OB2273 (PWM SOT23-6) microcircuits.
MainBoard - the main board (motherboard) is a T.MT8223.3B module, using SPI FLASH: W25Q16, EEPROM: 24C32, and others.
The F20WT-3DDR-E tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA320AP02
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: PVA, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare (Haze 7%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V


HYUNDAI H-LCD3212 TV with 32 "(81 cm) diagonal LCD display, 32: 9 format. LCD screen brightness of 500 cd / m² is provided by CCFL (EEFL) fluorescent lamps. Dynamic contrast ratio of 3000: 1 is ensured by special operation control illumination depending on the illuminated areas in the plot. You can view images in high quality HD at a resolution of 1366x768 pixels in the standard for graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic image Digital signal processing and generation takes place in the standards 480i, 480p, 576i, 576p, 720p, 1080i.
The power of the sound speaker system 16 W (2x8 W) is provided by two speakers. The audio processing system NICAM STEREO is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, S-Video, component, SCART x2, RGB, VGA, HDMI x2. An output for connecting headphones is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is used on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768.
Overall dimensions: 795x558x234 mm.
TV mass: 12 kg.
Attention! The HYUNDAI H-LCD3212 LCD TV panel LTA320AP02 is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!
Posted By: FRANK at 02:35
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