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 28 December 2019

REPAIRING / SERVICING TV SAMSUNG LE40S62B

Technical description and composition of the SAMSUNG LE40S62B TV, type of panel and applicable modules. The composition of the modules.
SAMSUNG
Model: LE40S62B
Panel: T400XW01 V.1
T-CON: T400XW01 V0 CTRL BD, 06A60-1
Inverter (backlight): 4H.V2358.011, 4H.V2358.001 V235-001
Power Supply (PSU): BN44-00165B AUO40-VE IP-231135A
PWM Power: DM0365R (Standby), FAN7382, ICE2BS01, ICE1PCS02 (PFC)
MOSFET Power: 13N50CF, FQPF9N50C
MainBoard: BN41-00811B BN94-01304C
IC MainBoard: MT8202EG, 24C32P, S29AL016D70TFI01
Tuner: N40-00079A
Control: IR: BN41-00712A
Specifications LE40S62B
SAMSUNG LE40S62B
General repair guidelines for TV LCD
Possible malfunctions
- SAMSUNG LE40S62B does not turn on at all. There is no reaction to the remote control and control buttons from the front panel. Indicator lights do not light or flash.
In some of these cases, the main switching power supply, the BN44-00165B 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 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 power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM controllers DM0365R (Standby), FAN7382, ICE2BS01, ICE1PCS02 (PFC), in the absence of visible damage or explicit short-circuit between the terminals, are checked by replacing with new ones, or obviously working.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn on and immediately 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 for 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.
Sometimes, for diagnostic purposes, inverter protection must be disabled. 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 BN41-00811B motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, you should 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 - MT8202EG, 24C32P, S29AL016D70TFI01. Defective components should be replaced.
Before replacing the N40-00079A tuner, if there is no tuning to 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
Attention to users! Self-repair of a SAMSUNG LE40S62B TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!


The appearance of the MainBoard BN41-00811B is shown in the figure below:
BN41-00811B
BN41-00811B can be used in TVs:
SAMSUNG LE37S62B (Panel CLAA370WA03 SC), SAMSUNG LE40S62B (Panel T400XW01 V.1).
The appearance of the power supply
Main features of the SAMSUNG LE40S62B device:
Installed matrix (LCD panel) T400XW01 V.1.
The matrix control uses the Timing Controller (T-CON) T400XW01.
To power the backlight, an inverter 4H.V2358.011 is used.
The necessary supply voltages for all nodes of the SAMSUNG LE40S62B TV are generated by the power module BN44-00165B, or its analogs using microchips DM0365R (Standby), FAN7382, ICE2BS01, ICE1PCS02 (PFC) and power switches of the type 13N50CF, FQPF9N50C.
MainBoard - the main board (motherboard) is a BN41-00811B module, using chips MT8202EG, 24C32P, S29AL016D70TFI01 and others.
The N40-00079A tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T400XW01 V1
Type: a-Si TFT-LCD, Panel
Diagonal size: 40 inch
Resolution: 1366x768, WXGA
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 885.168x497.664 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 430 cd / m²
Contrast Ratio: 1500: 1
Display Colors: 16.7M (8-bit)
Response Time: 15/8 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: CCFL Embedded (Balance board)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
Posted By: FRANK at 07:55
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