Technical description and composition of the TOSHIBA 32P2306EV TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 32P2306EV
Chassis / Version: PE1128
Panel: LC320DXE (SF) (R1)
LED backlight: 6870S-1578A
T-CON: 6870C-0442B 3203C3
LED driver (backlight): integrated into PSU
PWM LED driver: SEM5027
Power Supply (PSU): 32D59W2 V71A00027800 REV 1.0
MainBoard: PE1128 V28A001473B1
IC MainBoard: RTD2648SG, 25Q128, TPA3110D2
Tuner: TDSS-G232D
Specifications 32P2306
TOSHIBA 32P2306EV
General repair guidelines for TV LCD LED
Possible malfunctions
- The TOSHIBA 32P2306EV TV does not turn on and does not show any signs of operability. There is no reaction to either the remote control or the control buttons from the front panel.
Often in such cases, the 32D59W2 power module is faulty. 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.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, power supply, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback. PWM IC_Power may also cause a malfunction of the power switch of the converter and is checked by replacement.
- 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.
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.
To check the LED lines for breaks without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter, a voltage of the order of several tens of volts is required.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the PE1128 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). Sometimes they require checking or replacing (if necessary) the elements of the MainBoard board - RTD2648SG, 25Q128, TPA3110D2. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
Before changing the tuner TDSS-G232D, if there is no possibility of tuning to television channels, you should make sure that there are supply voltages that must be measured at the corresponding terminals of the tuner and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
For owners of the 32P2306EV TV, we recommend that you contact qualified personnel with the necessary work experience for repairs! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!
One of the typical TOSHIBA 32P2306EV malfunctions often occurs in the LG panel LC320DXE (SF) (R1).
External manifestations: there is no image, the backlight does not work. In most such cases, the LEDs turn out to be malfunctioning, which during testing turn out to be either in a cliff or with broken internal zener diodes.
LEDs must be replaced, and the maximum current from the driver should be limited to 10-20%.
The appearance of MainBoard PE1128 is shown in the figure below:PE1128
PE1128 can be used in TVs:
TOSHIBA 32P2306EV (Panel LC320DXE (SF) (R1)), TOSHIBA 39P2300D (Panel TL390FS31-0), TOSHIBA 39P2306EV (Panel TL390FS2B-0).
The appearance of the power supply
Main features of the TOSHIBA 32P2306EV device:
Installed matrix (LED-panel) LC320DXE (SF) (R1).
The matrix control uses the Timing Controller (T-CON) 6870C-0442B.
To power the backlight LEDs, a converter is used, combined with the power supply, controlled by the SEM5027 PWM controller.
The formation of the necessary supply voltages for all nodes of the TOSHIBA 32P2306EV TV is carried out by the 32D59W2 power module, or its analogs.
MainBoard - the main board (motherboard) is a PE1128 module, using RTD2648SG, 25Q128, TPA3110D2 and other chips.
The TDSS-G232D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC320DXE-SFR1
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: IPS, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 1%), Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 68%
Response Time: 6 (G to G)
Frequency: 60Hz
Lamp Type: WLED Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
Brand: TOSHIBA, Model: 32P2306.
Briefly from the TV: LCD, LED backlight, 32 ", 1366x768, 720p HD, sound: 20W, HDMI: 2.
The composition uses MainBoard PE1128 V28A001473B1 and LCD panel (matrix) LC320DXE (SF) (R1).
Power Supply Unit (PSU) 32D59W2 V71A00027800 REV 1.0 Power Supply.
TOSHIBA 32P2306 LED TV with LC320DXE LCD, 32 "(81 cm) diagonal in 16: 9 format. The required screen brightness of 300 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 12000: 1 is achieved by special control of the LEDs. V This model uses side illumination from Edge LEDs. You can view images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, JPEG.
The power of the acoustic system of sound 20 W (2x10 W) provide 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 x2, component, VGA, HDMI x2, 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, 1360x768.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C standards.
Overall dimensions: with stand 743x543x180 mm, without stand 743x479x65 mm.
TV mass: with stand: 5 kg, without stand: 4.4 kg.
Attention! TOSHIBA 32P2306 LED TV panel LC320DXE (SF) (R1) 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.
