Technical description and composition of the SAMSUNG LE40B653 TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE40B653 LE40B653T5W
Panel: T400HW02 V.5
Lamp backlight: 14 LAMP CCFL
T-CON: T370HW02 VE CTRL BD 37T04-C0J (AS15-U)
Inverter (backlight): integrated into PSU
PWM Inverter: SEM2006
MOSFET Inverter: 7N50
Power Supply (PSU): BN44-00264A H40F1_9SS
PWM Power: FAN7530, STR-W6252
MOSFET Power: FCPF11N60
MainBoard: BN41-01167B (MP1.1)
IC MainBoard: MX25L6405D, K4T511630G-HCE7, WM8593SEFT, WM8521H9GEO, STA339BW, ATMLH9362EB-1
Tuner: BN40-00145A
Technical Specifications LE40B653
SAMSUNG LE40B653
General repair guidelines for TV LCD
Possible malfunctions
- The SAMSUNG LE40B653 TV does not turn on, does not respond to the remote control and the control panel buttons, the indicators do not light or flash.
In some of these cases, a fault is detected in the BN44-00264A power module. It is then necessary to measure its output voltages and, if they are absent, check the power switches (FCPF11N60) and the rectifier diodes of the converters for a short circuit probability.
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 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. Chips PWM (PWM) FAN7530, STR-W6252 are usually checked by replacing with new, 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.
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. After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, it is necessary to ring in its converter the power switches for breakdown and the secondary windings of transformers for an open.
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). When repairing an MB board, you need to check its components MX25L6405D, K4T511630G-HCE7, WM8593SEFT, WM8521H9GEO, STA339BW, ATMLH9362EB-1. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
In the absence of tuning to the channels of terrestrial or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the tuner BN40-00145A. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
Owners of LE40B653 TVs are recommended 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!
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.
Main features of the SAMSUNG LE40B653 device:
Installed matrix (LCD panel) T400HW02 V.5.
The matrix control uses the Timing Controller (T-CON) T370HW02.
To power the backlight, a converter is used, combined with a power supply, controlled by a PWM controller SEM2006. As power elements of the inverter, keys of the 7N50 type are used.
The necessary supply voltages for all nodes of the SAMSUNG LE40B653 TV are generated by the BN44-00264A power module or its analogs using FAN7530, STR-W6252 microchips and FCPF11N60 type power switches.
MainBoard - the main board (motherboard) is a module BN41-01167B, using microchips MX25L6405D, K4T511630G-HCE7, WM8593SEFT, WM8521H9GEO, STA339BW, ATMLH9362EB-1 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: T400HW02 V5
Type: a-Si TFT-LCD, Panel
Diagonal size: 40 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA3, Normally Black, Transmissive
Active Area: 885.6x498.15 mm
Surface: Clear, Antireflection
Brightness: 500 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 1.07B (10-bit), CIE1931 72%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: CCFL
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V