Technical description and composition of the BBK LEM2683F TV, type of panel and applicable modules. The composition of the modules.BBK LED
Model: LEM2683F
Panel: V260H1-LE1 REV.C6
Power Supply (PSU): AY068D-4SF15 3BS0032514
MainBoard: T.MS.18VG.81B 11467
Tuner: CDT-3SP5I2-36
Control: RC-LEM101
Technical Specifications LEM2683F
BBK LEM2683F
General repair guidelines for TV LCD LED
Possible malfunctions
- The BBK LEM2683F TV does not turn on and does not show any signs of turning on. There are no reactions to the control buttons or the remote control.
Most often, with such manifestations, the main power module AY068D-4SF15 is found to be faulty. It is necessary to measure its secondary output voltages, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for a short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually 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. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power switch may be PWM (PWM). It is checked only by replacement with a known good one.
- 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.
As a rule, in such cases there is no display backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
It is impossible to check the line of series-connected LEDs without a special current source, and for this purpose it is not safe to use any voltage sources above 12V. Then it remains only to open the panel and check each LED separately. Usually, Chinese 9V-powered multimeters light up a single 3-volt LED, if you connect the probes in the forward direction, the red probe to the anode, and the black to the cathode. In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- 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 T.MS.18VG.81B motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software).
If you suspect a malfunction of the CDT-3SP5I2-36 tuner, first of all, you need to verify the correctness of the software, as well as the presence of the necessary voltage levels and pulses of data exchange with the processor via the I2C bus at the corresponding terminals of the tuner.
Attention! For users and owners of LEM2683F TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
Repair MainBoard
The appearance of MainBoard T.MS.18VG.81B is shown in the figure below:
T.MS.18VG.81B
T.MS.18VG.81B can be used in TVs:
AKAI LEA-26V07P (Panel LC260EXN (SD)(A2)), BBK LEM2683F (Panel V260H1-LE1 REV.C6).
Main features of the BBK LEM2683F device:
Installed matrix (LED panel) V260H1-LE1 REV.C6.
The formation of the necessary supply voltages for all nodes of the BBK LEM2683F TV is carried out by the power module AY068D-4SF15, or its analogs.
MainBoard - the main board (motherboard) is a module T.MS.18VG.81B.
The tuner CDT-3SP5I2-36 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CMO
Model: V260H1-LE1
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 576x324 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 400 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.7M, CIE1931 72%
Response Time: 1.5 / 3.5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 13S6P WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
Brand: BBK, Model: LEM2683F.
Short from TV: LCD, 1080p Full HD, 26 "(66 cm) diagonal, HDMI: 3, USB, backlight type: Edge LED.
The composition includes MainBoard T.MS.18VG.81B 11467 and an LCD panel (matrix) V260H1-LE1 REV.C6.
Power Supply Unit (PSU) AY068D-4SF15 3BS0032514 Power Supply.
BBK LEM2683F LED TV with V260H1-LE1 LCD, 26 "(66 cm) diagonal size of 16: 9 format. The required screen brightness of 400 cd / m² is provided by LED backlighting. The ratio of maximum brightness to minimum (contrast) is 1000 : 1. This model uses Edge LED backlighting. The design and technical capabilities of the TV include watching programs and movies in high quality HD at a resolution of 1920x1080 pixels in graphic resolution according to the standard 1080p (Full HD). Input high-frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, WMA, MPEG4, DivX, MKV, Jpeg.
The power of the sound system 12 W (2x6 W) provides two speakers. The audio processing system NICAM STEREO is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, component, SCART, RGB, VGA, HDMI x3, USB. An output for connecting headphones is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is used on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768, 1920x1080.
The power consumed by the TV in the operating mode from the network is 60 watts.
Overall dimensions: With stand 644x461x165 mm, Without stand 644x414x45 mm.
TV mass: 6 kg.
Attention! The BB2 LEM2683F LED TV panel V260H1-LE1 REV.C6 is an expensive and unreliable element.
Avoid any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also unsafe to get liquid on the screen. Sometimes one drop is enough if it flows down the glass onto the cables so that the TV becomes unrepairable.