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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Friday 10 April 2020

REPAIR / SERVICING TV AKIRA LCT-47CH19ST

Technical description and composition of the TV AKIRA LCT-47CH19ST, type of panel and applicable modules. The composition of the modules.
Akira
Model: LCT-47CH19ST
Chassis / Version: JUG.7.820.265_Ver1.00
Panel: LC470WU4
T-CON: LC470WU4-SLA1 R8A00014BFP, M12L64322A, TPS65161
Inverter (backlight): C MASTER 6632L-0392D, D SLAVE 6632L-0393D
PWM Inverter: BD9897FS
Trans Inverter: FDD8447L X8
Power Supply (PSU): PSU: FSP368-4N02
PWM Power: TEA1532A, NCP1653A (PFC), L6598D (PWM Push-Pul 16pin), LM358
MOSFET Power: 04N70BF, 2SK3568
MainBoard: JUG.7.820.265 Ver1.00
IC MainBoard: CPU: SVP-AX68-7668LF; SPI: 25X80VS; EEPROM: IS24C64; PS201 HY5DU281622FTP-4; TDA9886TS; TDA7266ZA
Tuner: AFT7 / W103 (RoHS)
Control: GK23J6-C9
Technical Specifications LCT-47CH19ST
AKIRA LCT-47CH19ST
General recommendations for repairing TV LCD
If the Akira LCT-47CH19ST TV does not turn on, you must first check the operation of the power module.
If it is working, you should check both inverters - C MASTER 6632L-0392D and D SLAVE 6632L-0393D. Power switches are checked for thermal breakdown, and a PWM malfunction is sometimes visible visually by damage to the chassis. If the keys are broken, then the BD9897FS PWM controller, in most cases, also requires a preventive replacement.
If there is no image on the screen, but there is sound, first of all, check the MASTER and SLAVE display backlight inverters.
The refinement of inverters based on the BD9897FS PWM controller is described in a separate article here.
The figure below shows the voltage values at the control points of the main board (Main Board).
We categorically do not recommend the owners of TVs self-repair attempts without appropriate qualifications and experience!
FIRMWARE FOR SPI FLASH  ----------->  EEPROM Akira LCT-47CH19ST, Main: JUG.7.820.265 Ver1.00, Panel: LC470WU4






 The appearance of MainBoard JUG.7.820.265_Ver1.00 is shown in the figure below:
JUG.7.820.265_Ver1.00
Key Features of the AKIRA LCT-47CH19ST:
Installed matrix (LCD panel) LC470WU4.
The matrix control uses the Timing Controller (T-CON) LC470WU4-SLA1.
Inverter C is used to power the backlight, controlled by the BD9897FS PWM controller. The transformer FDD8447L X8 is installed in the inverter converter.
The necessary supply voltages for all nodes of the TV AKIRA LCT-47CH19ST are generated by the PSU power module: FSP368-4N02, or its analogs using TEA1532A, NCP1653A (PFC), L6598D (PWM Push-Pul 16pin), LM358 chips and 04N70BF type power switches, 2SK3568.
MainBoard - the main board (motherboard) is a JUG.7.820.265 module, using CPU chips: SVP-AX68-7668LF; SPI: 25X80VS; EEPROM: IS24C64; PS201 HY5DU281622FTP-4; TDA9886TS; TDA7266ZA and others.
The AFT7 / W103 (RoHS) tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC470WU4-SLA2
Type: a-Si TFT-LCD, Panel
Diagonal size: 47 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 1039.68x584.82 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit)
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 23 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V

 Trademark: AKIRA, Model: LCT-47CH19ST.
Briefly from the TV: LCD, 47 ", 1920x1080, 1080p Full HD, there is PIP, sound: 10W, HDMI connectors: 2.
The composition uses MainBoard JUG.7.820.265 Ver1.00 and LCD panel (matrix) LC470WU4.
Power Supply Unit (PSU) PSU: FSP368-4N02 Power Supply.
TV AKIRA LCT-47CH19ST with LCD display LC470WU4, diagonal size 47 "(119 cm) in 16: 9 format. Screen brightness of 500 cd / m² is ensured by backlight CCFL (EEFL) lamps. Contrast - the ratio of maximum brightness to minimum is at least 2000 : 1. The design and technical capabilities of the TV provide for viewing in high quality HD at a resolution of 1920x1080 pixels in graphic decomposition according to the standard 1080p (Full HD). The input high-frequency or video signal is decoded in analog PAL, SECAM, NTSC systems. Digital signal generation (graphic form am) produced in standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p.
The power of the sound system 10 W (2x5 W) provide 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, audio x3, S-Video, component, VGA, HDMI x2. A standard VGA (D-Sub 15) connector is used to connect a laptop or computer. This interface supports resolutions: 640x480, 800x600, 1024x768.
The power consumed by the TV working in the network mode is 300 watts.
Overall dimensions: With stand 731x468x166 mm, Without stand 731x437x87 mm.
Attention! The AKIRA LCT-47CH19ST LCD TV panel LC470WU4 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 05:30
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