Technical description and composition of the BBK LED2473FW TV, type of panel and applicable modules. The composition of the modules.BBK LED
Model: LED2473FW
Chassis / Version: E182VG-Z1-B0
Panel: LM230WF5 (TL) (D1)
T-CON: LM230WF5-TLD1 P / N: 6870S-1120A
LED driver (backlight): OT2405-0
Power Supply (PSU): FSE060E0
PWM Power: LD7535 (PWM 6 pin)
MainBoard: E182VG-Z1-B0
IC MainBoard: MST6M182VGC-LF-Z1, 25Q32FVSIG, TPA1517
Tuner: R620D
Appearance
BBK LED2473FW
General repair guidelines for TV LCD LED
Possible malfunctions
- BBK LED2473FW TV does not turn on. There are no signs of operability. The indicators on the front panel do not shine and do not blink, and the remote control and control buttons do not respond.
In the vast majority of such cases, a malfunction is detected in the FSE060E0 power module. It is necessary to measure the secondary output voltage, 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 a 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 key may be PWM (PWM) LD7535 (PWM 6 pin). It is checked only by replacement with a known good one.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
Usually in such cases, a malfunction is detected in the backlight nodes of the LED panel. The reason can be both in the power of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
It should be remembered that it is not possible to determine the open circuit in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required. Then it is necessary to open the panel and check each LED separately with a multimeter. If the capabilities of your multimeter do not allow you to open the LED in the forward direction or dual LEd are used, then the PN junction of the emergency zener diode can indirectly serve as a health indicator. In case of LED-a failure, the zener diode PN junction will either be cut off or broken into short-circuit.
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the E182VG-Z1-B0 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). In some cases, to repair the MB board (SSB), it may be necessary to replace the chips - MST6M182VGC-LF-Z1, 25Q32FVSIG, TPA1517 with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
If there is no reception of television channels, but the TV is working properly from external devices, first of all it is necessary to check the voltage of the R620D tuner and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Attention! Users and owners of LED2473FW TVs who do not have the appropriate qualifications, knowledge and experience are strongly advised against self-repair attempts in order to avoid negative consequences that could lead to complete non-repairability of the device.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> LED1973W LED2273FW LED2473FW (MST182VG + 2IN1 POWER SUPPLY)
The appearance of the MainBoard E182VG-Z1-B0 is shown in the figure below:E182VG-Z1-B0
E182VG-Z1-B0 can be used in TVs:
BBK LED2273FDTW LED2273FW (Panel M215BD1WU3-2), BBK LED2473FW (Panel LM230WF5 (TL)(D1)).
The appearance of the power supply
Main features of the BBK LED2473FW device:
Installed matrix (LED-panel) LM230WF5 (TL) (D1).
The matrix control uses the Timing Controller (T-CON) LM230WF5-TLD1.
The LED driver OT2405-0 is used to power the backlight LEDs.
The necessary supply voltages are generated for all nodes of the BBK LED2473FW TV by the FSE060E0 power module or its analogs using LD7535 microcircuits (PWM 6 pin).
MainBoard - the main board (motherboard) is an E182VG-Z1-B0 module, using microcircuits MST6M182VGC-LF-Z1, 25Q32FVSIG, TPA1517 and others.
The R620D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LM230WF5-TLD1
Type: a-Si TFT-LCD, Panel
Diagonal size: 23.0 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 509.184x286.416 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 1.3 / 3.7 (Tr / Td)
Frequency: 60Hz
Lamp Type: 2 strings WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V