Technical description and composition of the SAMSUNG LE37S62B TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE37S62B
Panel: CLAA370WA03 SC
T-CON: CPT 370WA03C
Inverter (backlight): 4H.V1838.491-B1 BAT30370T40A CPT 370WA03S
Power Supply (PSU): BN44-00157A
PWM Power: TDA4863-2 (PFC), VIPer22A (Standby), F9222L
MainBoard: BN41-00811B BN94-01304B
IC MainBoard: MT8202EG, 24C32P, S29AL016D70TFI01
Tuner: BN40-00079A
Control: Remote: BN59-00507A
Technical Specifications LE37S62B
SAMSUNG LE37S62B
General repair guidelines for TV LCD
Possible manifestations of defects
- SAMSUNG LE37S62B TV 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.
Usually with such manifestations, the defect is caused by faulty elements in the main power module BN44-00157A. It is necessary to measure its output voltages and, if they are absent, to check the serviceability of power switches and rectifier diodes in the converters for possible breakdown.
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key more often breaks.
The breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency-setting or damper ones, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM) TDA4863-2 (PFC), VIPer22A (Standby), F9222L, if they do not have visible damage to the case and open fault between the terminals, are usually checked by replacement.
- There is no image, but there is sound, it reacts to the remote control. Or 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 the inverter.After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, you must ring in its converter power keys for breakdown and secondary windings of transformers for an open.
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 enter the operating mode, does not respond to the remote control. The indicator on the front panel lights up constantly or blinks.
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). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - MT8202EG, 24C32P, S29AL016D70TFI01 and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board. Typically, such defects are detected by local heating of the chip.
The malfunction of the tuner BN40-00079A is established after checking the software and all the supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
It should be remembered! Attempts to self-repair a SAMSUNG LE37S62B 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!
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 LE37S62B device:
Installed matrix (LCD panel) CLAA370WA03 SC.
The matrix control uses the Timing Controller (T-CON) CPT.
To power the backlight, an inverter 4H.V1838.491-B1 is used.
The necessary supply voltages for all nodes of the SAMSUNG LE37S62B TV are generated by the BN44-00157A power module or its analogs using TDA4863-2 (PFC), VIPer22A (Standby), F9222L microcircuits.
MainBoard - the main board (motherboard) is a BN41-00811B module, using chips MT8202EG, 24C32P, S29AL016D70TFI01 and others.
The tuner BN40-00079A provides the reception of television programs and tuning to channels.
