Technical description and composition of the TV SHARP LC-32HG3142E, type of panel and applicable modules. The composition of the modules.SHARP LED
Model: LC-32HG3142E
Chassis / Version: TP.MS3463S.PB711
Panel: LSC320AN10
LED backlight: L.D32061235-083IS-F
T-CON: 16Y_GH11MB7S4LV0.2
LED driver (backlight): integrated into PSU
PWM LED driver: SO-8 Package
MOSFET LED driver: TO-252
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MainBoard: TP.MS3463S.PB711
IC MainBoard: CPU: MSD3463, SPI FLASH: 25Q64
Tuner: CDT-9NT372-RF01 + SAT
Technical Specifications LC-32HG3142E
SHARP LC-32HG3142E
General repair guidelines for TV LCD LED
Possible malfunctions
- The SHARP LC-32HG3142E TV 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.
First of all, in such cases, you should verify the operability of the common switching power supply (IIP) - AC / DC voltage converter of the mains voltage. All source elements in this TV model are located on the MainBoard TP.MS3463S.PB711 main board. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches and rectifier diodes in the converters for a short circuit.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
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. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) PWM SOT23-6, in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
The most likely in these cases is a malfunction of the LED backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
When diagnosing, it is necessary to take into account that it is impossible to check the open in the chain of LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally, a current source. By opening the panel, each LED can be checked separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect probes in the forward direction to it. 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, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the TP.MS3463S.PB711 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuits and matrix. If necessary, update or replace the software (software). In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - CPU: MSD3463, SPI FLASH: 25Q64 which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
If you suspect a malfunction of the CDT-9NT372-RF01 + SAT 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.
We recommend the owners of the LC-32HG3142E TV for repair only to qualified specialists with the necessary work experience! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!
FIRMWARE SPI FLASH SHARP LC-32HG3142E, Main: TP.MS3463S.PB711, Panel: LSC320AN10
The appearance of MainBoard TP.MS3463S.PB711 is shown in the figure below:TP.MS3463S.PB711
Main features of the SHARP LC-32HG3142E device:
Installed matrix (LED-panel) LSC320AN10.
The matrix control uses the Timing Controller (T-CON) 16Y_GH11MB7S4LV0.2.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the SO-8 Package PWM controller. As power elements of the LED driver, keys of the TO-252 type are used.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter circuit using PWM SOT23-6 microcircuits.
MainBoard - the main board (motherboard) is a module TP.MS3463S.PB711, using CPU chips: MSD3463, SPI FLASH: 25Q64 and others.
The tuner CDT-9NT372-RF01 + SAT provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LSC320AN10
Type: a-Si TFT-LCD, CELL
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: PVA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare
Glass Depth: 0.50 + 0.50 mm
Contrast Ratio: 4000: 1
Display Colors: 16.7M (8-bit), CIE1931 68%
Response Time: 20 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
