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 DLP-32C3

Technical description and composition of the DAEWOO DLP-32C3 TV, panel type and applicable modules. The composition of the modules.
DAEWOO
Model: DLP-32C3
Chassis / Version: SL223P
Panel: LTA320WT-LF2
T-CON: 320WSC4LV.5.9 (8)
Inverter (backlight): INVFT320A REV1.0
PWM Inverter: BD9882F (16pin)
MOSFET Inverter: AP4525GEH
Trans Inverter: IT-133-06AA
Power Supply (PSU): A.PWGT6YE561
PWM Power: STR-A6151, FAN5501A, STR-T2268, LA5752
MOSFET Power: W20NM60
MainBoard: 4859813793_03 SL223P (MP) A.DGGT72E490
IC MainBoard: CPU: SVP-PX66, K4D263238I-50; EEPROM; 24C32L1; Sound: MSP 4610K D6
Tuner: FQ1216ME / IH-5
Technical Specifications DLP-32C3
DAEWOO DLP-32C3
General recommendations for repairing TV LCD
Possible malfunctions
- DAEWOO DLP-32C3 TV does not turn on and does not show any signs of operability at all. There is no reaction to either the remote control or the front panel control buttons.
In the vast majority of such cases, a malfunction is detected in the W20NM60 power module. It is necessary to verify the presence of secondary voltages and, if they are absent, check the power switches 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). 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.
These manifestations can be triggered by the power module, or by inverter defects, as well as by the distortion of the currents in the lamps due to their uneven wear. If all the electrolytic capacitors of the filter according to the power supply of the inverter are serviceable, you should make sure that the lamps are in good working condition, then you need to check the converter keys and the secondary windings of the transformers.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the 4859813793_03 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuit 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 - CPU: SVP-PX66, K4D263238I-50; EEPROM; 24C32L1; Sound: MSP 4610K D6 for new or obviously working. In cases where BGA technologies are used, defects are usually localized by the heating method.
Before replacing the FQ1216ME / IH-5 tuner, if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
For owners of the DLP-32C3 TV, 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!
SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>   DAEWOO DLP-26C2, DLP-26C3, DLP-32C1, DLP-32C2, DLP-32C3, DLP-37C3, DLP-42C1 chassis SL-223P

SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    INVFT320A INVFT320A


 The appearance of MainBoard 4859813793_03 is shown in the figure below:
4859813793_03
4859813793_03 can be used in TVs:
DAEWOO DLP-32C1 (Panel LTA320WT-LF2), DAEWOO DLP-32C2 (Panel LTA320WT-LF2), DAEWOO DLP-32C3 (Panel LTA320WT-LF2).
Main features of the DAEWOO DLP-32C3 device:
Installed matrix (LCD panel) LTA320WT-LF2.
The matrix control uses the Timing Controller (T-CON) 320WSC4LV.5.9.
To power the backlight, an INVFT320A inverter is used, it is controlled by the BD9882F PWM controller (16pin). The transformer IT-133-06AA is installed in the inverter converter. As power elements of the inverter, keys of the AP4525GEH type are used.
The necessary supply voltages for all nodes of the DAEWOO DLP-32C3 TV are generated by the A.PWGT6YE561 power supply module or its analogs using the STR-A6151, FAN5501A, STR-T2268, LA5752 microchips and W20NM60 type power switches.
MainBoard - the main board (motherboard) is a module 4859813793_03, using CPU chips: SVP-PX66, K4D263238I-50; EEPROM; 24C32L1; Sound: MSP 4610K D6 and others.
The FQ1216ME / IH-5 tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA320WT-LF2
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-PVA, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare (Haze 44%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: FFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
 Brand: DAEWOO, Model: DLP-32C3.
Short from TV: LCD, 32 ", 1366x768, 720p HD, sound: 20 watts.
The composition uses MainBoard 4859814993 -03 and the LCD panel (matrix) LTA320WT-L06.
Power Supply Unit (PSU) FEL-3226H Power Supply.
DAEWOO DLP-32C3 LCD TV with LTA320WT-L06 LCD display, 32 "(81 cm) diagonal size in 16: 9 format. 500 cd / m² screen brightness is provided by CCFL (EEFL) lamps. The ratio of maximum brightness to minimum ( contrast ratio) is 3000: 1. It is possible to view images in high quality HD at a resolution of 1366x768 pixels in the standard of 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.
The power of the sound speaker system 20 W (2x10 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, SCART x2, RGB, VGA, HDMI. A VGA (D-Sub 15) connector is used to connect a computer or laptop. This interface supports resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768.
The power consumed by the TV in the operating mode from the network is 160 watts.
Overall dimensions: With a support 608x456x215 mm, Without a support 806x575x114 mm.
Attention! The panel of the LTA320WT-L06 LCD-TV DAEWOO DLP-32C3 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 04:48
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