Technical description and composition of the SAMSUNG LE37B652T4W TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE37B652T4W LE37B652
Chassis / Version: N68A
Panel: T370HW02 V.E
Lamp backlight: 10 Lamp CCFL
T-CON: T315HW02 V3 CTRL BD 31T06-C03; AUO-12401
Inverter (backlight): integrated into PSU
PWM Inverter: SEM2005 / BD9893
MOSFET Inverter: 5N50
Trans Inverter: LT-HU37
Power Supply (PSU): BN44-00262A H37F1-9SS
PWM Power: FAN7530, STR-W6252
MOSFET Power: 6N60
MainBoard: BN41-01167B (MP1.1) BN94-02583J
IC MainBoard: SDP83, ATMLH906 2EB, KFH8GH6U4M, STA339BWS, SII9287ACNU, WM8593SFFT
Tuner: BN40-00145A
Technical Specifications LE37B652
SAMSUNG LE37B652T4W
General repair guidelines for TV LCD
Possible malfunctions
- SAMSUNG LE37B652T4W does not turn on and does not show any signs of performance at all. Does not blink indicators and does not respond to control buttons.
In such cases, the malfunction should be sought first in the BN44-00262A power supply module. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches (6N60) and rectifier diodes in the converters for a short circuit.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the mains fuse and, less often, the current sensor at the source of the key are most often cut off.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. FAN7530, STR-W6252 PWM controllers, in the absence of visible damage or frank short-circuit between the terminals, are checked by replacing with new ones, or obviously working.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, 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 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 TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the BN41-01167B 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). Board repair and chip replacement SDP83, ATMLH906 2EB, KFH8GH6U4M, STA339BWS, SII9287ACNU, WM8593SFFT are carried out with the necessary equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
The malfunction of the tuner BN40-00145A is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Attention to users! Self-repair of a SAMSUNG LE37B652T4W TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
SCHEMATICS ----> Samsung LE37B652 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 BN44-00262A Power supply.
The appearance of the MainBoard BN41-01167B is shown in the figure below:BN41-01167B
BN41-01167B can be used in TVs:
SAMSUNG LE40B550A5W (Panel LTF400HA08 A03), SAMSUNG LE32B551A6W LE32B551 (Panel LTF320HA09), SAMSUNG LE40B653 LE40B653T5W (Panel T400HW02 V.5), SAMSUNG LE37B652T4W LE37B65H02 panel Panel T37H4040402G V.
The appearance of the power supply
Main features of the SAMSUNG LE37B652T4W device:
Installed matrix (LCD panel) T370HW02 V.E.
The matrix control uses the Timing Controller (T-CON) T315HW02.
To power the backlight, a converter is used, combined with a power supply, controlled by a PWM controller SEM2005 / BD9893. A transformer LT-HU37 is installed in the inverter converter. As power elements of the inverter, keys of the 5N50 type are used.
The necessary supply voltages for all nodes of the SAMSUNG LE37B652T4W TV are generated by the BN44-00262A power supply module or its analogs using FAN7530, STR-W6252 microcircuits and 6N60 type power switches.
MainBoard - the main board (motherboard) is a BN41-01167B module, using microchips SDP83, ATMLH906 2EB, KFH8GH6U4M, STA339BWS, SII9287ACNU, WM8593SFFT and others.
The tuner BN40-00145A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: AUO
Model: T370HW02 VE
Type: a-Si TFT-LCD, Panel
Diagonal size: 37 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA3, Normally Black, Transmissive
Active Area: 819.36x460.89 mm
Surface: Clear
Brightness: 500 cd / m²
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 5.5 (G to G)
Frequency: 60Hz
Lamp Type: 10 pcs CCFL Without Driver
Signal Interface: LVDS (2 ch, 10-bit), 51 pins
Voltage: 12.0V