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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Saturday, 11 April 2020

REPAIR / SERVICING TV DAEWOO DSL-20M1TC

Technical description and composition of the DAEWOO DSL-20M1TC TV, panel type and applicable modules. The composition of the modules.
DAEWOO
Model: DSL-20M1TC
Panel: A201SN02 V.4 // A201SN02 V.5
Inverter (backlight): 2899C V4.2 MINV20-08AU1B01
Trans Inverter: UI12001
Power Supply (PSU): Adapter CH-1205P 12v 5a
PWM Power: BA10358 (8pin), 1203D (8pin)
MOSFET Power: K2996
MainBoard: 3262C V1.1, 3784C V2.1 DVD
IC MainBoard: TDA1517P, MSP3415G 88
Tuner: MPE06-1-E
Technical Specifications DSL-20M1TC
DAEWOO DSL-20M1TC
General recommendations for repairing TV LCD
Possible manifestations of defects
- The DAEWOO DSL-20M1TC TV does not turn on and does not show any signs of turning on at all. There are no reactions to the control buttons or the remote control.
Failure in such cases should be sought in the adapter power supply circuits.
This TV model is equipped with an external power adapter type Adapter CH-1205P 12v 5a, which the owner can purchase independently, and repairing it may not always be advisable, however, sometimes it makes some sense to open it and eliminate simple typical defects typical of IPS . It is necessary to measure its secondary output voltages, and if they are absent, check the operability of the power switches (K2996) of the converters and rectifier diodes 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.
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) BA10358 (8pin), 1203D (8pin). It is checked only by replacement with a known good one.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
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 inverter. If all the electrolytic capacitors of the filter according to the power supply of the inverter are working, make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
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 their completion it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- 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 3262C 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 some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - TDA1517P, MSP3415G 88 with new or obviously good ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
If the TV works normally from external devices, but does not tune into television channels, the MPE06-1-E 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.
Attention! For users and owners of DSL-20M1TC TVs who do not have the appropriate qualifications, knowledge and experience, we strongly recommend against attempting self-repair in order to avoid negative consequences that could lead to complete non-serviceability of the device.



Main features of the DAEWOO DSL-20M1TC device:
The matrix (LCD panel) A201SN02 V.4 or A201SN02 V.5 is installed.
A 2899C inverter is used to power the backlight. The transformer UI12001 is installed in the inverter converter.
To power all the internal components of the DAEWOO DSL-20M1TC TV, an external adapter type CH-1205P 12v 5a is used using BA10358 (8pin), 1203D (8pin) microcircuits and K2996 type power switches.
MainBoard - the main board (motherboard) is a 3262C module, using TDA1517P, MSP3415G 88 chips, and others.
The MPE06-1-E tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: A201SN02 V4
Type: a-Si TFT-LCD, Panel
Diagonal size: 20.1 inch
Resolution: 800x600, SVGA
Display Mode: TN, Normally White, Transmissive
Active Area: 408x306 mm
Surface: Antiglare
Brightness: 450 cd / m²
Contrast Ratio: 500: 1
Display Colors: 16.7M (8-bit), CIE1931 75%
Response Time: 11/5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 6 pcs CCFL Without Driver
Signal Interface: TTL (1 ch, 8-bit), 50 pins
Voltage: 5.0V


Brand: DAEWOO, Model: DSL-20M1TC.
Short from TV: LCD, built-in DVD player, 20 ", 1024x768.
The composition includes MainBoard 3262C V1.1, 3784C V2.1 DVD and LCD-panel (matrix) A201SN02 V.4, or A201SN02 V.5.
Power supply unit external Adapter CH-1205P 12v 5a.
LCD TV DAEWOO DSL-20M1TC with LCD A201SN02, diagonal size 20 "in 4: 3 format. The brightness of the screen is 250 cd / m² with CCFL (EEFL) lamps. The ratio of maximum brightness to minimum (contrast) is 450: 1 The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in the standards 480i, 480p, 576i, 576p. Supported media file formats: MP3, MPEG4, VideoCD, SVCD, JPEG. Stereo audio implemented by two built-in speakers. Stem NICAM STEREO audio processing.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x3, S-Video, component, SCART, RGB, VGA, USB. An output for connecting headphones is provided. A VGA (D-Sub 15) connector is used to connect a computer or laptop. This interface supports resolutions: 640x480, 800x600, 1024x768.
Overall dimensions: With stand 490x478x184 mm, Without stand 514x460x85 mm.
The mass of the TV: 9.52 kg.
Attention! The A201SN02 V.4 panel of the DAEWOO DSL-20M1TC LCD TV 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 05:17
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