Technical description and composition of the BBK LEM3283F TV, panel type and applicable modules. The composition of the modules.BBK LED
Model: LEM3283F
Panel: V315H3-LE4 Rev. C1
LED driver (backlight): T87D106.00
Power Supply (PSU): AY068D-4SF04 Rev1.0
MainBoard: T.MS18VG.81B 11467
IC MainBoard: MST6M182VG-LF-Z1, SPI Flash: 25Q32BSIG, TPA3110D2, IT6633E-P, AIC2857F
Tuner: CDT-3SP5I2-36
Control: RC-LEM101
Technical Specifications LEM3283FDT
BBK LEM3283F
General repair guidelines for TV LCD LED
Possible malfunctions
- BBK LEM3283F does not turn on at all and does not show any signs of operability. Does not blink indicators and does not respond to control buttons.
With such manifestations, in most cases, the AY068D-4SF04 power module is 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 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, but there is sound, it reacts to the remote control. Or the image appears when you turn it on and immediately disappears
In such cases, the most likely malfunction of the LED backlight elements. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect the probes in the forward direction to it (red probe to the anode, 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.MS18VG.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).
Before replacing the tuner CDT-3SP5I2-36, if there is no tuning for the channels, you must 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 I2C
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Entrust repair to professionals with sufficient experience in the field of repair of electronic equipment.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> BBK LEM3283FD (MST182VG+2IN1 POWER SUPPLY)
Service Manual with Schematic Diagram 44 pages on the model LEM3283FD, LEM3283FDT
The appearance of MainBoard T.MS18VG.81B is shown in the figure below:T.MS18VG.81B
T.MS18VG.81B can be used in TVs:
AKAI LEA-32V07P (Panel T315XW06 V.0), BBK LEM3283 V1.0 (Panel LC320EXN SDA1), BBK LEM3283F (Panel V315H3-LE4 Rev.C1), ERISSON 42LEN60 (Panel LC420EUN), ERISSON 32LEN60 (Panel LTA320AN01 D02 ), FUSION FLTV-32H20B (Panel LM315TA-T01), SUPRA STV-LC3217W (Panel LC320WXE-SBV1), SUPRA STV-LC3217AWL STV-LC3217W (Panel HV320WX2-201), SUPRA STV-LC3277W (Panel HV320WX2-201), SUPRA STV-LC32170F (Panel HK315TVM-HHC9H).
Main features of the BBK LEM3283F device:
Installed matrix (LED-panel) V315H3-LE4 Rev. C1.
The LED driver T87D106.00 is used to power the backlight LEDs.
The formation of the necessary supply voltages for all nodes of the BBK LEM3283F TV is carried out by the power module AY068D-4SF04, or its analogs.
MainBoard - the main board (motherboard) is a module T.MS18VG.81B, using microcircuits MST6M182VG-LF-Z1, SPI Flash: 25Q32BSIG, TPA3110D2, IT6633E-P, AIC2857F and others.
The tuner CDT-3SP5I2-36 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: V315H3-LE4
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: MVA, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Antiglare (Haze 11%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 6000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8.5 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V