Technical description and composition of the SAMSUNG LE40A615A3F TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE40A615A3F
Chassis / Version: N46A
Panel: T400HW01 V.4
Lamp backlight: CCFL
T-CON: T400HW01 V.4 CTRL BD
Inverter (backlight): 4H.V2358.181 / D
Power Supply (PSU): BN44-00199A IP-211135A
PWM Power: FAN7530, QM853 STM4472, FSQ0765RG, LX1692BIDW
MOSFET Power: FCPF11N60
MainBoard: BN41-00974B MT8226_EMMA
IC MainBoard: MT8226, MT8291E, NTP-3100, WT61P8, HYB25DC256163CE-4, K4T56163QT
Tuner: BN40-00120A TDHG6-K10A
Technical Specifications LE40A615A3F
SAMSUNG LE40A615A3F
General repair guidelines for TV LCD
Possible manifestations of defects
- SAMSUNG LE40A615A3F does not turn on. There are no signs of operability. The indicators on the front panel do not light or flash, the TV does not respond to the remote control and control buttons.
In some of these cases, the main switching power supply, the BN44-00199A module, is faulty. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches (FCPF11N60) and rectifier diodes for a possible partial or complete breakdown.
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, QM853 STM4472, FSQ0765RG, LX1692BIDW 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.
A 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, the breakdown keys and the transformer secondary windings must be ringed in its converter.
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 BN41-00974B 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). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements MT8226, MT8291E, NTP-3100, WT61P8, HYB25DC256163CE-4, K4T56163QT. BGA chip malfunctions are usually easy to detect by warming up.
If a tuner BN40-00120A TDHG6-K10A is suspected of malfunction, first of all, it is necessary to verify the correctness of the software, as well as the presence of the necessary supply voltage levels and data exchange pulses with the processor via the I2C bus on the corresponding tuner pins.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair to professionals with sufficient experience in the repair of electronic equipment.
Service manual and schematic diagram ----- >SAMSUNG LE40A615A3F Chassis N46A.
The appearance of the MainBoard BN41-00974B is shown in the figure below:
BN41-00974B
BN41-00974B can be used in TVs:
SAMSUNG LE32A556P1 LE32A556P1F (Panel LTF320HA01 A04), SAMSUNG LE37A552 LE37A552P3R (Panel T370HW02 V.4), SAMSUNG LE37A656A1 LE37A656A1FXRU (Panel T370HW02 V6), SAMSUNG LE32A558P3F (Panel LTF320HA01), SAMSUNG LE40A656A1F (Panel LTF400HC01 A02), SAMSUNG LE37A615A3F LE37A615 (Panel T370HW02 V.4), SAMSUNG LE40A556P1F (Panel V400H1-L03 REV C1), SAMSUNG LE40A558P3F LE40A558 (Panel LTF400HA03), SAMSUNG LE32A656A1F (Panel LTF320HA04).
The appearance of the power supply
Main features of the SAMSUNG LE40A615A3F device:
Installed matrix (LCD panel) T400HW01 V.4.
The matrix control uses the Timing Controller (T-CON) T400HW01.
To power the backlight, an inverter 4H.V2358.181 is used.
The necessary supply voltages for all nodes of the SAMSUNG LE40A615A3F TV are generated by the BN44-00199A power supply module or its analogs using FAN7530, QM853 STM4472, FSQ0765RG, LX1692BIDW microchips and power switches of the FCPF11N60 type.
MainBoard - the main board (motherboard) is a BN41-00974B module, using chips MT8226, MT8291E, NTP-3100, WT61P8, HYB25DC256163CE-4, K4T56163QT and others.
The tuner BN40-00120A TDHG6-K10A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: AUO
Model: T400HW01 V4
Type: a-Si TFT-LCD, Panel
Diagonal size: 40 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 885.6x498.15 mm
Surface: Antiglare (Haze 11%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 15/5 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: CCFL Embedded (Balance board)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V