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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Sunday, 22 December 2019

REPAIRING / SERVICING TV SAMSUNG LE32B652T4W

Technical description and composition of the SAMSUNG LE32B652T4W TV, panel type and applicable modules. The composition of the modules.
SAMSUNG
Model: LE32B652T4W
Chassis / Version: N68A
Panel: T315HW02 V.3
Inverter (backlight): integrated into PSU
PWM Inverter: SEM2006
MOSFET Inverter: 4N50
Power Supply (PSU): BN44-00261A
PWM Power: FAN7530 (PFC), STR-W6252
MOSFET Power: 6N60
MainBoard: BN41-01167C
IC MainBoard: WM8593SEF-T, STA339BW, TEA6425D, K4T1G164QE-HCE7
Tuner: BN40-00145A TDHG6-K12A
Technical Specifications LE32B652
SAMSUNG LE32B652T4W
General repair guidelines for TV LCD
Possible malfunctions
- SAMSUNG LE32B652T4W does not turn on. There is no reaction to the remote control and control buttons from the front panel. Indicator lights do not light or flash.
Often in such cases, the power source, the BN44-00261A module, is faulty. It is necessary to measure its output voltages and, if they are completely absent, check the power switches (6N60) and rectifier diodes for the probability of short circuit in the converters.
In case of breakdowns in the secondary circuits, the converter can emergencyly operate in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, power supply, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback.
Chips PWM FAN7530 (PFC), STR-W6252 are usually checked by replacing with working ones.
The serviceability of the PFC node is checked by the presence of an increased voltage (380V) on the filter of the network rectifier.
- There is no image, there is sound, it reacts to the remote control, channels are switched. In some cases, the image appears when you turn on and immediately disappears.
These manifestations can be triggered by a power supply module, or by inverter defects, as well as a distortion of the currents in the lamps due to their uneven wear. If all the electrolytic capacitors of the filter according to the inverter power supply 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 indicator blinks or glows constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the BN41-01167C 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 - WM8593SEF-T, STA339BW, TEA6425D, K4T1G164QE-HCE7. Defective components should be replaced.
Before changing the tuner BN40-00145A TDHG6-K12A, if it is not possible to tune to television channels, make sure that there are supply voltages that need to be measured at the corresponding terminals of the tuner and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
It should be remembered! Attempts to independently repair the SAMSUNG LE32B652T4W TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!


 SCHEMATICS: Samsung LE32B550 Chassis N68A.

FOR MODELS: LE32B55*, LE37B55*, LE40B55*, LE46B55*, LE32B65*, LE37B65*, LE40B65*, LE46B65*, LE55B65*, LE32B57*, LE37B57*, LE40B57*, LE46B57*, LE32B67*, LE37B67*, LE40B67*, LE46B67*, LE55B67*, LE40B62*, LE46B62*, LE52B62*, LE40B75*, LE46B75*, LE52B75*.

PSU SCHEMATICS: Samsung BN44-00261A Power supply.


The appearance of the MainBoard BN41-01167C is shown in the figure below:
BN41-01167C
BN41-01167C can be used in TVs:
SAMSUNG LE32B550A5 (Panel LTF320HA09), SAMSUNG LE32B653T5W (Panel T315HW02), SAMSUNG LE32B652T4W (Panel T315HW02 V.3), SAMSUNG LE37B653T5W LE37B653 (Panel T370HW02 V.E).
The appearance of the power supply
Main features of the SAMSUNG LE32B652T4W device:
Installed matrix (LCD panel) T315HW02 V.3.
To power the backlight, a converter is used, combined with a power supply, controlled by a PWM controller SEM2006. As power elements of the inverter, keys of type 4N50 are used.
The necessary supply voltages for all nodes of the SAMSUNG LE32B652T4W TV are generated by the BN44-00261A power module or its analogs using FAN7530 (PFC), STR-W6252 microcircuits and 6N60 type power switches.
MainBoard - the main board (motherboard) is a module BN41-01167C, using microcircuits WM8593SEF-T, STA339BW, TEA6425D, K4T1G164QE-HCE7 and others.
The tuner BN40-00145A TDHG6-K12A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: AUO
Model: T315HW02 V3
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Glare (Haze 0%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (2 ch, 10-bit), 51 pins
Voltage: 12.0V
Posted By: FRANK at 09:55
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