Technical description and composition of the SAMSUNG LE37B653T5W TV, panel type and applicable modules. The composition of the modules.SAMSUNG CCFL
Model: LE37B653T5W LE37B653
Chassis / Version: N68A
Panel: T370HW02 V.E
Lamp backlight: 10 Lamp CCFL
T-CON: T370HW02.VE CTRL BD
Inverter (backlight): integrated into PSU
PWM Inverter: SEM2005 / BD9893
MOSFET Inverter: 5N50
Trans Inverter: LT-HU37
Power Supply (PSU): BN44-00262A PSIV181E01A
PWM Power: STR-W6252, FAN7530
MOSFET Power: 6N60
MainBoard: BN41-01167C BN94-03167N
IC MainBoard: WM8593SEF-T, STA339BW, TEA6425D, K4T1G164QE-HCE7
Tuner: BN40-00145A
Technical Specifications LE37B653
SAMSUNG LE37B653T5W
General repair guidelines for TV LCD CCFL
Possible malfunctions
- The SAMSUNG LE37B653T5W TV does not turn on, does not respond to the remote control and the control panel buttons, does not light up or blink indicators.
In such cases, the malfunction should be sought first in the BN44-00262A power supply module. It is necessary to verify the presence of its output voltages and, if they are completely absent, check the power switches (6N60) and rectifier diodes for a probable short circuit.
In the event of breakdowns in the secondary circuits of the converter, it can usually fail in short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse or current sensor at the source of the key most often breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) STR-W6252, FAN7530, in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- 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.
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 turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
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). In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its chips WM8593SEF-T, STA339BW, TEA6425D, K4T1G164QE-HCE7 and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Before replacing the BN40-00145A tuner, if there is no tuning for the channels, first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Attention to users! Self-repair of a SAMSUNG LE37B653T5W TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
SCHEMATICS ------> Samsung LE37B653 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 BN41-01167C 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 LE37B653T5W device:
Installed matrix (CCFL panel) T370HW02 V.E.
The matrix control uses the Timing Controller (T-CON) T370HW02.VE.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by the SEM2005 / BD9893 PWM controller. 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 LE37B653T5W TV are generated by the BN44-00262A power module or its analogs using STR-W6252, FAN7530 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 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
