Technical description and composition of the DEXP H32D7100C TV, type of panel and applicable modules. The composition of the modules.DEXP LED
Model: H32D7100C
Chassis / Version: TP.MS3463S.PB801
Panel: ST3151A05-8 Ver2.5
LED backlight: RA7XE8 4C-LB320T-YHM
T-CON: TA570758BQ18091HY1MA
LED driver (backlight): integrated into MainBoard
PWM LED driver: SN51DP
MOSFET LED driver: AOD458
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MainBoard: TP.MS3463S.PB801
IC MainBoard: MSD3463GU, GD25Q64, OB6220VP
Tuner: XF-3SDT-H T3 / 1 R 1/648
Technical Specifications H32D7100C
DEXP H32D7100C
General repair guidelines for TV LCD LED
Possible malfunctions
- DEXP H32D7100C does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
In such cases, the AC / DC voltage converter, which is combined with the main board TP.MS3463S.PB801, is often faulty. Then it is necessary to measure its output voltages and, in case of their complete or partial absence, it is necessary to check the serviceability of power switches and rectifier diodes of the converters for a possible 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. 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, but there is sound, it reacts to the remote control. Or the image appears when you turn it 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.
To detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
- 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 TP.MS3463S.PB801 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 cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its chips MSD3463GU, GD25Q64, OB6220VP and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
The malfunction of the XF-3SDT-H T3 / 1 R 1/648 tuner is established after checking the software and all the supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Owners and users of the DEXP H32D7100C TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Chassis TP.MS3463S.PB801
FIRMWARE FOR SPI FLASH -----------> DEXP H32D7100C, Main: TP.MS3463S.PB801, Panel: ST3151A05-8 Ver2.5
There is a version of H32D7100C (TI PI VI) - Panel: C320X17-E63-L (G32), T-Con: 6870C-0442B, MainBoard JUC7.820.00188290 HLS80JS 2017-7-4.Repair MainBoard
The appearance of MainBoard TP.MS3463S.PB801 is shown in the figure below:
TP.MS3463S.PB801
TP.MS3463S.PB801 can be used in TVs:
AKAI LEA-40V35M (Panel LSC400HM06), AKIRA 32LED38T2P (Panel ST3151A05-8), AKIRA 32LED02T2M (Panel ST3151A04-9 Ver.2.1), BBK 32LEM-1029/TS2C (Panel C320X16-E18-H), BBK 39LEM-1033/TS2C (Panel C390X15-E8-A G01), BBK 32LEM-1026/TS2C (Panel CX315DLEDM ST3151A05-8), BBK 32LEM-1027/TS2C (Panel ST3151A05-8 / CX315DLEDM), DEXP F43C7100K (Panel LC430DUY (SH)(A1)), DEXP F42B7000M (Panel V420HJ2-P01), DEXP F43C7000C (Panel C430F14-E1-L / LC430DUY), DEXP F40B7100K (Panel LSC400HN02-G02 40N06-L-HPX1F1), DEXP H28C7100C (Panel C275X15-E1-H (G31)), DEXP H32C7300K (Panel LSC320AN02), DEXP H32D7100C (Panel ST3151A05-8 Ver2.5), DEXP H28D7300K (Panel HV280WX2-260), ERISSON 32LES78T2W (Panel KM0320LDRH0037), ERISSON 32LEE30T2 (Panel LK315T3HB87-12V), SUPRA STV-LC32T560WL (Panel LSC320AN10), SUPRA STV-LC32T550WL (Panel LSC320AN02), SUPRA STV-LC40T500WL (Panel C39X15-E7-A), TELEFUNKEN TF-LED32S45T2 (Panel LK315T3HB87-12V), THOMSON T39D20DH-01B (Panel T390XVN01.0).
Main features of the DEXP H32D7100C device:
Installed matrix (LED panel) ST3151A05-8 Ver2.5.
The matrix control uses the Timing Controller (T-CON) TA570758BQ18091HY1MA.
To power the backlight LEDs, a converter is used, combined with the TP.MS3463S.PB801 main board, controlled by the SN51DP PWM controller. As power elements of the LED driver, keys of the AOD458 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.PB801, using microchips MSD3463GU, GD25Q64, OB6220VP and others.
Tuner XF-3SDT-H T3 / 1 R 1/648 provides the reception of television programs and tuning to channels.
A DEXP H32D7100C TV with an ST3151A05-8 LCD display, 32 "(81 cm) diagonal size in 16: 9 format. The required screen brightness of 200 cd / m² is provided by LED backlighting. Contrast - the ratio of maximum brightness to minimum is 3000: 1. The LCD panel uses direct pixel illumination with rear LEDs - Direct LED. You can watch broadcasts and movies and images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). Supported media file formats: MP3, WMA, MPEG4, HEVC (H.265), Xvid, DivX, MKV, JPEG.
The power of the sound speaker system 16 W (2x8 W) is provided by two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV x2, audio x2, component, VGA, HDMI x3, USB. An output for connecting headphones is provided. The digital tuner is capable of receiving television channels in DVB-T MPEG4, DVB-C, DVB-T2 standards.
Overall dimensions: with stand 731x491x204 mm, without stand 731x439x98 mm.
TV Weight: with stand: 4.72 kg, without stand: 4.3 kg.
Attention! The ST3151A05-8 Ver2.5 panel of a DEXP H32D7100C LED TV 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.
