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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Tuesday, 24 December 2019

REPAIRING / SERVICING TV SAMSUNG LE32M51BS


Technical description and composition of the SAMSUNG LE32M51BS TV, panel type and applicable modules. The composition of the modules.
SAMSUNG
Model: LE32M51BS
Chassis / Version: GML32KE
Panel: LTA320W2-L14
Lamp backlight: 16 Lamp CCFL
T-CON: 320W2S4LV6.4
Inverter (backlight): KLS-S320BCI-V
Trans Inverter: 320BCI
Power Supply (PSU): BN41-00522B
PWM Power: VIPER12A, ICE1PCS02, STR-W6755
MOSFET Power: 18N50
MainBoard: BN41-00630B (2005.06.14)
IC MainBoard: MSP4410K B3, M30620SP, MST9883CR-LF, SIL9993CTG100
Tuner: BN40-00051A TMQZ6-404C
Technical Specifications LE32M51BS
SAMSUNG LE32M51BS
General repair guidelines for TV LCD
Possible malfunctions
- The SAMSUNG LE32M51BS 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.
In some of these cases, a fault is detected in the BN41-00522B power module. 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 any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And during short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM circuits are usually checked by replacement with new ones, or known to be working.
- There is no image, there is sound, there is a reaction to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
These manifestations can be triggered by a power supply module, or by inverter defects, as well as 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 working, then you need to check the converter keys and the secondary windings of the transformers.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during operations, and after their completion, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The indicator blinks or glows constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the BN41-00630B 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 - MSP4410K B3, M30620SP, MST9883CR-LF, SIL9993CTG100. Defective components should be replaced.
If there is no reception of television channels, but the TV is working properly from external devices, first of all, check the voltage of the tuner BN40-00051A TMQZ6-404C and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
We recommend LE32M51BS TV owners for repair only to qualified specialists with the necessary work experience! Attempts to repair it yourself without the appropriate knowledge and skills can lead to irreversible negative consequences!


Service manual and schematic diagram SAMSUNG LE32M51BS Chassis GML32KE



 The appearance of the MainBoard BN41-00630B is shown in the figure below:
BN41-00630B
BN41-00630B can be used in TVs:
SAMSUNG LE40M51BS LE40M51B (Panel LTA400W2-L01), SAMSUNG LE32M51BS (Panel LTA320W2-L14).
The appearance of the power supply
Main features of the SAMSUNG LE32M51BS device:
Installed matrix (LCD panel) LTA320W2-L14.
The matrix control uses the Timing Controller (T-CON) 320W2S4LV6.4.
To power the backlight used inverter KLS-S320BCI-V. A 320BCI transformer is installed in the inverter converter.
The necessary supply voltages for all nodes of the SAMSUNG LE32M51BS TV are generated by the BN41-00522B power module or its analogs using VIPER12A, ICE1PCS02, STR-W6755 microcircuits and 18N50 type power switches.
MainBoard - the main board (motherboard) is a BN41-00630B module, using microchips MSP4410K B3, M30620SP, MST9883CR-LF, SIL9993CTG100 and others.
The tuner BN40-00051A TMQZ6-404C provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA320W2-L14
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: 450 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8/6 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: 16 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
Posted By: FRANK at 08:32
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