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 LE52M87BD

Technical description and composition of the SAMSUNG LE52M87BD TV, panel type and applicable modules. The composition of the modules.
SAMSUNG
Model: LE52M87BD
Chassis / Version: GTU52SEN
Panel: LTA520HA03
T-CON: 520HTC4L V1.0 // V520H1-C06
Inverter (backlight): INV52B24A (RU) SSB520WA24 + BN44-00150A
PWM Inverter: FAN7382 (8pin)
Power Supply (PSU): BN44-00150A - SIP52 // BN44-00150B
MainBoard: BN41-00813E MP1.0 EasySearch ID: ES2008
IC MainBoard: MST3560M-LF-170, SiI9125CTU, SVP-WX68, HYB25D256163CE, 24C256WP, NTP-3000
Tuner: BN40-00096A
Technical specifications LE52M87BD
SAMSUNG LE52M87BD
General repair guidelines for TV LCD
SAMSUNG LE52M87BD TV, like any other, it is advisable to start repairing with an inspection of internal and external elements. Visible damage to elements can sometimes suggest directions for finding a defect even before the necessary measurements are taken. Ring cracks in the soldering of the leads of the elements, deformed electrolytic capacitors, charred resistors - all this for the repairman can be a hint in assumptions about the causes and consequences of the malfunction.
In the absence of any signs of operability, when the SAMSUNG LE52M87BD does not turn on and does not signal anything with the control lights on the panel, most likely the BN44-00150A power supply module is faulty. When diagnosing and repairing the BN44-00150A power supply, first of all, it is necessary to check the fuse, and if it breaks, you should check the power switch and rectifier bridge diodes for avalanche (thermal) breakdown.
If a breakdown of the power switch of the flyback converter of the power supply unit is detected, it should be remembered that it does not fail for no reason, which should be sought by checking other elements of the primary circuit - electrolytic capacitors, a PWM controller that can only be checked by replacement, as well as others semiconductor elements (diodes, transistors, zener diodes).
Diagnostics of power modules with a Power Factor Corrector (CMC) is somewhat more complicated and requires a more detailed approach.
If the SAMSUNG LE52M87BD does not have an image, there is sound and the channels are switched, there is a possibility of a malfunction of the display backlight, or their power converter - inverter. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the inverter itself, including in the secondary rectifier of the main power supply.
In most cases, the diagnosis and repair of the INV52B24A (RU) SSB520WA24 inverter is difficult due to the organization of protection, which turns it off in emergency cases to avoid fires during short circuits or open circuits in high voltage circuits and when the lamps are depressurized. Often, repairmen block the protection circuits in order to make the necessary measurements at the control points of the inverter to identify the causes of the defect.
All necessary precautions must be observed when disabling the inverter protection during diagnostics and not leaving it disconnected after the repair is completed.
Diagnostics and repair of the BN41-00813E-MP1.0 EasySearch ID: ES2008 motherboard is carried out by checking the performance of power stabilizers or updating the software (software).
Attention to users! Self-repair of a SAMSUNG LE52M87BD TV without the appropriate qualifications and experience can lead to its complete non-repairability!


SCHEMATIC ------------->  Samsung LLE37M87BDX, LE40M87BDX, LE46M87BDX, LE52M87BDX Chassis GTU37SEN, GTU40SEN, GTU46SEN, GTU52SEN.


The appearance of the MainBoard BN41-00813E is shown in the figure below:
BN41-00813E
BN41-00813E can be used in TVs:
SAMSUNG LE23R86 LE23R86BCX / FID (Panel T230XW01 v1), SAMSUNG LE37M87BD LE37M87BDX (Panel T370HW02 v.2), SAMSUNG LE52M87BD (Panel LTA520HA03), SAMSUNG LE40N87BDX LE40N87H1 (Panel).
The appearance of the power supply
Main features of the SAMSUNG LE52M87BD device:
Installed matrix (LCD-panel) LTA520HA03.
The matrix control uses the Timing Controller (T-CON) 520HTC4L.
The INV52B24A inverter is used to power the backlight lamps, it is controlled by the FAN7382 (8pin) PWM controller.
The formation of the necessary supply voltages for all nodes of the SAMSUNG LE52M87BD TV is carried out by the BN44-00150A power module, or its analogues.
MainBoard - the main board (motherboard) is a BN41-00813E module, using microcircuits MST3560M-LF-170, SiI9125CTU, SVP-WX68, HYB25D256163CE, 24C256WP, NTP-3000 and others.
The tuner BN40-00096A provides the reception of television programs and tuning to channels.
Information from an alternative source:
SAMSUNG LE52M87BD Chassis GTU52SEN
Panel type (matrix): LTA520HA03, MAIN AV :, - BORDEAUX PLUS - BN41-00813E-MP1.0 EasySearch ID: ES2008, - Bordeaux-Plus - BN41-008136 EasySearch ID: ES664, - BN94-01206D - BN41-00813B - MP1.0 - BORDEAUX PLUS EasySearch ID: ES6553
T-con: 520HTC4L V1.0,
Inverter :, INV52B24A (LL) SSB520WA24, INV52B24A (LU) SSB520WA24, INV52B24A (RU) SSB520WA24, INV52B24A (RL) SSB520WA24, Side AV: BN96-05039R
PSU: BN44-00150A, Schematic
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA520HA03
Type: a-Si TFT-LCD, Panel
Diagonal size: 52 inch
Resolution: 1920x1080, FHD
Display Mode: S-PVA, Normally Black, Transmissive
Active Area: 1152x648 mm
Lamp Type: CCFL














Posted By: FRANK at 09:05
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