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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Monday, 30 March 2020

REPAIR / SERVICING TV TOSHIBA 32W2454

Technical description and composition of the TOSHIBA 32W2454 TV, panel type and applicable modules. The composition of the modules.
Toshiba
Model: 32W2454 32W2454RK
Chassis / Version: l2300
Panel: LC320DXJ-SFE1
T-CON: 32/37 ROW2.1 HD VER 0.1 6870C-0442B PEV3232-06Y
Inverter (backlight): integrated into PSU; 82.53V 350mA
PWM Inverter: OZ9908AGN // 7223PE
MOSFET Inverter: D8N25
Power Supply (PSU): UE-3840-1U
PWM Power: FAN6754MR, IN1M101
MOSFET Power: K6A65D
MainBoard: 60EB40M25A01P
IC MainBoard: MSD8841BX-VW, H5TQ2G63DFR-PBC, 25Q64, TAS5707L
Tuner: TDSY-G230D
Specifications 32W2454
TOSHIBA 32W2454
General recommendations for repairing TV LCD
Possible manifestations of defects
- The TOSHIBA 32W2454 TV does not turn on, does not respond to the remote control and the control panel buttons, the indicators do not light or flash.
In such cases, the UE-3840-1U power supply is usually faulty. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches (K6A65D) and rectifier diodes in the converters for a short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during a short circuit in the elements of the primary circuit, the mains fuse usually breaks.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback circuits (OOS) of stabilization. PWM controllers (PWM) FAN6754MR, IN1M101, if they do not have visible damage to the chassis and open fault between the terminals, are usually checked by replacement.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or the inverter.After checking all the electrolytic capacitors of the filters that are involved in the power supply to the inverter, you must ring in its converter power keys for breakdown and secondary windings of transformers for an open.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during work, and after they are finished, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the 60EB40M25A01P motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). Sometimes it is necessary to check or replace (if necessary) the elements of the MainBoard board - MSD8841BX-VW, H5TQ2G63DFR-PBC, 25Q64, TAS5707L. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
If the TV works normally from external devices, but does not tune into television channels, the TDSY-G230D tuner may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding conclusions. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
For 32W2454 TV owners, we recommend that you contact qualified personnel with the necessary work experience for repairs! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!
FIRMWARE FOR SPI FLASH  ----------->   TOSHIBA 32W2454 32W2454RK l2300, Main: 60EB40M25A01P, Panel: LC320DXJ-SFE1


 Service Manual 52 pages of 2014 on models 32W2453RK, 32W2454RK, 32L2453RB, 32L2454RB, 40L2453RK, 40L2454RK


 The appearance of the MainBoard 60EB40M25A01P is shown in the figure below:
60EB40M25A01P
60EB40M25A01P can be used in TVs:
TOSHIBA 40L2453RK (Panel UNV4031Y 1823-01XU0TB), TOSHIBA 32W2454 32W2454RK (Panel LC320DXJ-SFE1).
The appearance of the power supply
Main features of the TOSHIBA 32W2454 device:
Installed matrix (LCD panel) LC320DXJ-SFE1.
The matrix control uses the Timing Controller (T-CON) 32.
To power the backlight lamps, a converter is used, combined with a power supply unit, controlled by the OZ9908AGN // 7223PE PWM controller. As power elements of the inverter, keys of the D8N25 type are used.
The necessary supply voltages for all nodes of the TOSHIBA 32W2454 TV are generated by the power module UE-3840-1U, or its analogues using FAN6754MR, IN1M101 microcircuits and K6A65D type power switches.
MainBoard - the main board (motherboard) is a 60EB40M25A01P module, using microchips MSD8841BX-VW, H5TQ2G63DFR-PBC, 25Q64, TAS5707L and others.
The TDSY-G230D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC320DXJ-SFE1
Type: a-Si TFT-LCD, CELL
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: IPS, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 1%), Hard coating (3H)
Glass Depth: 0.50 + 0.50 mm
Contrast Ratio: 1200: 1
Display Colors: 16.7M (6-bit + Dithering)
Response Time: 8/10 (Tr / Td)
Frequency: 60Hz
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V


 Trademark: TOSHIBA, Model: 32W2454.
Briefly from the TV: LCD, LED backlight, 32 ", 1366x768, 720p HD, sound: 14W, HDMI connectors: 2.
On the official website of Toshiba there are firmware (software updates) for the models 32W2454RK (05/01/15), 32W2454DG (05/01/15).
The composition uses MainBoard 60EB40M25A01P and LCD panel (matrix) LC320DXJ-SFE1.
Power Supply Unit (PSU) UE-3840-1U Power Supply.
Display technology: Screen format: 16: 9. 1366x768. Backlight: LED EDGE. Brightness: 300 cd / m². Contrast: 1200: 1. Dynamic contrast: 25,000: 1. Response time: 20 ms. Viewing angle: 178 °.
Image Technology: Frame Update: Resolution plus AMR 100. 24p True Cinema. Digital noise reduction.
Wireless interface: Digital tuner. Analog tuner.
Input and output connectors (wired interface): RF antenna input. SCART: there is. HDMI: 2. USB: 1. Digital audio output (optical) SD: yes. Headphone jack: yes.

Technical description
TOSHIBA 32W2454 LED TV with LC320DXJ-SFE1 LCD display, 32 "(81 cm) diagonal size in 16: 9 format. The required screen brightness of 250 cd / m² is provided by LED backlighting. The ratio of maximum brightness to minimum (contrast) is 1200 : 1. Dynamic contrast ratio of 25000: 1 is achieved by special control of the LEDs. The LCD panel uses backlighting from Direct LEDs. You can view images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). Input high frequency The actual or video signal can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, WMA, MPEG4, DivX , MKV, JPEG.
The power of the speaker system of sound 14 W (2x7 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, component, SCART, VGA, HDMI x2, MHL, USB. 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, 1360x768.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Overall dimensions: with stand 735x478x183 mm, without stand 735x442x70 mm.
TV mass: 6 kg.
Attention! The TOSHIBA 32W2454 LED TV panel LC320DXJ-SFE1 is an expensive and unreliable element.
Avoid any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also unsafe to get liquid on the screen. Sometimes one drop is enough if it flows down the glass onto the cables so that the TV becomes unrepairable.
Posted By: FRANK at 05:08
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