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-20D1T

Technical description and composition of the DAEWOO DSL-20D1T TV, panel type and applicable modules. The composition of the modules.
DAEWOO
Model: DSL-20D1T
Chassis / Version: SL-110P
Panel: LC201V02 (A3) (K1)
T-CON: LC201V02-A3KA 6870S-0060J BUF11702 HC353125B 1451A
Inverter (backlight): P2066E45 Ver. 2.0 // DS-1009WB
PWM Inverter: BIT3105
Power Supply (PSU): SW-6500
PWM Power: 1M0680R (KA1M0680), ICE2A165 (Standby)
MainBoard: 97T65M2001-13
IC MainBoard: PW164B-10T, VPC3230D, SST39VF800A, 24C16A, LA4635A, MSP 3410G V3, SAA5664PS / M3 / 1437, LVC541A
Tuner: TCPQ9091PD27E (S)
Control: R46L36
Technical Specifications DSL-20D1T
DAEWOO DSL-20D1T
General recommendations for repairing TV LCD
Possible manifestations of defects
- The DAEWOO DSL-20D1T TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
Often in such cases, the SW-6500 power module is faulty. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches and rectifier diodes in the converters for a short circuit.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short-circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the main fuse and, less often, the current sensor at the source of the key are most often cut off.
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. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) 1M0680R (KA1M0680), ICE2A165 (Standby), in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- 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.
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, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the 97T65M2001-13 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). If it is not possible to replace the MB board (SSB), you need to check the health of its elements - PW164B-10T, VPC3230D, SST39VF800A, 24C16A, LA4635A, MSP 3410G V3, SAA5664PS / M3 / 1437, LVC541A. Defective components should be replaced.
Before replacing the tuner TCPQ9091PD27E (S), 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
TV users and owners need to remember that attempts to self-repair a DAEWOO DSL-20D1T TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!


SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>   DAEWOO DSL-20D1T chassis SL-110P

 The appearance of the MainBoard 97T65M2001-13 is shown in the figure below:
97T65M2001-13
The appearance of the power supply
Main features of the DAEWOO DSL-20D1T device:
Installed matrix (LCD panel) LC201V02 (A3) (K1).
The matrix control uses the Timing Controller (T-CON) LC201V02-A3KA.
To power the backlight, an inverter P2066E45 is used, it is controlled by the BIT3105 PWM controller.
The necessary supply voltages for all nodes of the DAEWOO DSL-20D1T TV are generated by the SW-6500 power supply module or its analogs using 1M0680R (KA1M0680), ICE2A165 (Standby) microcircuits.
MainBoard - the main board (motherboard) is a module 97T65M2001-13, using chips PW164B-10T, VPC3230D, SST39VF800A, 24C16A, LA4635A, MSP 3410G V3, SAA5664PS / M3 / 1437, LVC541A and others.
The TCPQ9091PD27E (S) tuner provides television reception and channel tuning.
Information from an alternative source:
DAEWOO DSL-20D1T chassis: SL-110P
Motherboard: WTP-20C2, PW164B-10T, VPC3230D, SST39VF800A, 24C16A, LA4635A, MSP 3410G V3, SAA5664PS / M3 / 1437, LVC541A, Tuner: TCPQ9091PD27E
Invertor: P2066E45 Ver. 2.0, BIT3105
T-con: LC201V02-A3KA 6870S-0060J, BUF11702, HC353125B, 1451A
PSU: SW-6500, 1M0680R, ICE 2A165 0205L
Remote control: R46L36 Service Manual,
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC201V02-A3K1
Type: a-Si TFT-LCD, Panel
Diagonal size: 20.1 inch
Resolution: 640x480, VGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 408x306 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 350: 1
Display Colors: 16.7M (8-bit)
Response Time: 12/13 (Tr / Td)
Frequency: 60Hz
Lamp Type: 6 pcs CCFL Without Driver
Signal Interface: CMOS (1 ch, 8-bit), 41 pins
Voltage: 12.0V
 Brand: DAEWOO, Model: DSL-20D1T.
Briefly from the TV: LCD, 20 ", 640x480, sound: 5 watts.
The composition uses MainBoard 97T65M2001-13 and LCD-panel LC201V02 (A3) (K1).
Power Supply Unit (PSU) SW-6500 power Supply.
LCD TV DAEWOO DSL-20D1T with LCD display LC201V02, diagonal size 20 "4: 3 format. The brightness of the screen is 450 cd / m² backlight lamps CCFL (EEFL). The ratio of maximum brightness to minimum (contrast) is 400: 1 The input high-frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC.
The power of the speaker system 5 W (2x2.5 W) provides 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. An output for connecting headphones is provided.
Dimensions: With stand 608x456x215 mm, Without stand 944x529x115 mm.
Attention! The DAEWOO DSL-20D1T LCD panel LC201V02 (A3) (K1) is the most expensive component of it.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!
Posted By: FRANK at 05:12
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