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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Thursday, 16 April 2020

REPAIR / SERVICING TV ERISSON 23LEA01

Technical description and composition of the ERISSON 23LEA01 TV, panel type and applicable modules. The composition of the modules.
ERISSON LED
Model: 23LEA01
Chassis / Version: AS-MST6M181VS LL1
Panel: LTA230AP01
LED driver (backlight): integrated into PSU
PWM LED driver: BIT3251
Power Supply (PSU): MP113-W LED DR-35v
PWM Power: SG6848 (PWM SOT23-6)
MainBoard: AS-MST6M181VS LL1
IC MainBoard: SPI Flash: 25Q32; ;
Tuner: ET-6N1E-CF101R
Specifications 23LEA01
ERISSON 23LEA01
General repair guidelines for TV LCD LED
Possible malfunctions
- ERISSON 23LEA01 TV does not turn on, does not respond to the remote control and control panel buttons, indicators do not light up and do not blink.
In most of these cases, the MP113-W main switching power supply fails. It is necessary to measure the secondary output voltages, and if they are absent, check the operability of the power switches of the converters and rectifier diodes for a short circuit probability.
In case of breakdowns in the secondary circuits, the converter can emergencyly operate in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power switch may be PWM (PWM) SG6848 (PWM SOT23-6). It is checked only by replacement with a known good one.
- 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 most likely in these cases is a malfunction of the LED backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To check the LED strips, to open all the transitions of the LEDs, several tens of volts or more are needed, it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED transitions in forward bias, you can sometimes detect the presence of a PN junction of the protective zener diode by connecting the probes in the opposite direction. If the zener diode is broken or broken in short-circuit, then the LED is faulty and needs to be replaced.
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the AS-MST6M181VS 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). In cases of attempts to repair the MB board (SSB), it is necessary to check the health of its elements - SPI Flash: 25Q32; ; which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
The malfunction of the tuner ET-6N1E-CF101R 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.
Attention! For users and owners of 23LEA01 TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
FIRMWARE FOR SPI FLASH  ----------->   ERISSON 23LEA01 , Main: AS-MST6M181VS LL1, Panel: LTA230AP01



 The appearance of the MainBoard AS-MST6M181VS is shown in the figure below:
AS-MST6M181VS
AS-MST6M181VS can be used in TVs:
AKAI LTA-15A15M (Panel LTA150XH-L06), AKAI LEA-22A08G (Panel LM215WF4 (TL)(E7)), AKAI LEA-19A08G (Panel LM185WH2-TLA1), ERISSON 32LEA01 (Panel LC320EXN (SD) (A1)), ERISSON 23LEA01 (Panel LTA230AP01).
Main features of the ERISSON 23LEA01 device:
The matrix (LED panel) LTA230AP01 is installed.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by a BIT3251 PWM controller.
The required supply voltages for all nodes of the TV ERISSON 23LEA01 are generated by the MP113-W power module or its analogs using SG6848 microcircuits (PWM SOT23-6).
MainBoard - the main board (motherboard) is an AS-MST6M181VS module, using SPI Flash chips: 25Q32; ; and others.
The ET-6N1E-CF101R tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA230AP01
Type: a-Si TFT-LCD, Panel
Diagonal size: 23.0 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 508.152x285.696 mm
Surface: Antiglare
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 68%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 11S3P WLED Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
Trademark: ERISSON, Model: 23LEA01.
Shortly from the TV: LCD, 720p HD, diagonal 23 "(58 cm), has HDMI, has USB, backlight type: Edge LED.
The composition uses MainBoard AS-MST6M181VS LL1 and an LCD panel (matrix) LTA230AP01.
Power Supply Unit (PSU) MP113-W LED DR-35v Power Supply.
ERISSON 23LEA01 TV with an LTA230AP01 LCD display, diagonal size 23 "(58 cm) in 16: 9 format. The LED panel of this TV has LED backlighting - Edge LED. You can view images in high quality HD at a resolution of 1366x768 pixels in standard graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Stereo audio is implemented two built-in speakers and .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), AV x2, audio x3, component, VGA, HDMI, 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.
Overall dimensions: With stand 463x360x45 mm, Without stand 463x310x134 mm.
Attention! The LTA230AP01 panel of the ERISSON 23LEA01 LED TV 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 05:57
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