Technical description and composition of the SAMSUNG LE32R41B TV, type of panel and applicable modules. The composition of the modules.SAMSUNG
Model: LE32R41B LE32R41BD
Chassis / Version: RE32EO
Panel: LTA320W2-L03
Lamp backlight: 16 Lamp CCFL
T-CON: LJ94-00453H 320W2C4LV1.4
Inverter (backlight): KLS-S320BCI-V - Rev 01
PWM Inverter: BD9886FV
MOSFET Inverter: AO4614
Trans Inverter: 4004L
Power Supply (PSU): BN41-00522B
PWM Power: VIPER12A, ICE1PCS02, STR-W6755
MOSFET Power: 18N50
MainBoard: BN41-00595A + BN41-00568C
IC MainBoard: IBM39STB04501, K4S281632F, K4S641632H
Tuner: BN40-00042A
Specifications LE32R41B
SAMSUNG LE32R41B
General repair guidelines for TV LCD
Possible malfunctions
- The SAMSUNG LE32R41B TV does not turn on and does not show any signs of turning on, it does not respond to the control buttons or the remote control.
In some of these cases, the main switching power supply, the BN41-00522B module, is faulty. It is necessary to measure its output voltages, and in case of their absence, check the serviceability of the power switches (18N50) of the converters and rectifier diodes for a short circuit probability.
In case of breakdowns of semiconductors in secondary circuits, the converter can usually work abnormally in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse often breaks.
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 microcircuits VIPER12A, ICE1PCS02, STR-W6755 are usually checked by replacing with new ones, or obviously working.
- 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 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.
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 on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the BN41-00595A 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). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Verification or replacement of elements IBM39STB04501, K4S281632F, K4S641632H requires the necessary training and professional skills in repairing modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
If the TV works normally from external devices, but does not tune into television channels, the tuner BN40-00042A may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
Once again, remind users! Attempts to self-repair a SAMSUNG LE32R41B TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
Service manual and schematic diagram SAMSUNG LE26R41B Chassis RE26EO
FOR MODELS: LE23R51B, LE26R51B, LE32R51B, LE32R52B, LE32R53B, LE40R51B, LE23R41B, LE26R41B, LE32R41B, LE37R41B.
The appearance of the MainBoard BN41-00595A is shown in the figure below:BN41-00595A
BN41-00595A can be used in TVs:
SAMSUNG LE26R41B LE26R41BD (Panel LTA260W2-L01 or LTA260W2-L11), SAMSUNG LE32R41B LE32R41BD (Panel LTA320W2-L03).
The appearance of the power supply
Main features of the SAMSUNG LE32R41B device:
Installed matrix (LCD-panel) LTA320W2-L03.
The matrix control uses the Timing Controller (T-CON) LJ94-00453H.
To power the backlight, an inverter KLS-S320BCI-V is used, it is controlled by the BD9886FV PWM controller. A 4004L transformer is installed in the inverter converter. As power elements of the inverter, keys of the type AO4614 are used.
The necessary supply voltages for all nodes of the SAMSUNG LE32R41B 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 module BN41-00595A, using chips IBM39STB04501, K4S281632F, K4S641632H and others.
The tuner BN40-00042A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA320W2-L03
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: APVA, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare (Haze 40%), 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
