Technical description and composition of the TOSHIBA 26A3000P TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 26A3000P
Chassis / Version: A3000P
Panel: LC260WX2 (SL) (E2) 75007721
T-CON: LC260WX2-SLE1 6870C-0145B 75009274
Inverter (backlight): 75008448
Power Supply (PSU): PE0300
PWM Power: STR-W6756, STR-W6765
Mainboard: PE0288
IC MainBoard: CPU: TC90403FG; Scaler: FLI8541BE;
Tuner: ENG37E01GF
Specifications 26A3000
TOSHIBA 26A3000P
General recommendations for repairing TV LCD
Any repair of electronic equipment begins with an external inspection of the device and diagnostics of the malfunction. In this case, you should visually carefully examine all the elements of the TOSHIBA 26A3000P TV, both internal and external. Visible damage to elements can sometimes suggest further directions for finding a defect before starting the necessary measurements. Experienced repairmen are often aware of the causes of the defect and the possible consequences, for example, from ring cracks in the soldering of the leads of the elements, as well as from swollen capacitors or resistors burnt to coal dust and other external indirect signs.
In cases where the TOSHIBA 26A3000P TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink and there are no sounds and no signs of operability at all, the power module is most likely faulty or, which happens much less often, there is no processor power on the motherboard. In this case, first of all, it is necessary to check the fuse at the input of the network. If it is broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the N-FET converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Possible options.
The reasons for the breakdown of the power switch of the flyback converter of the power module can be different, for example, a malfunction of semiconductor elements or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the PWM controller chip or breakage of the resistors in its bundle.
In cases where the Power Factor Corrector (PFC) is used in the power supply, troubleshooting can be a bit more complicated.
In cases where the TOSHIBA 26A3000P TV has lost an image, and the sound is there and all other functions are operational, there is a possibility of a malfunction of the inverter (converter for powering the backlight). When you turn on the TV, the image may appear briefly and immediately disappear. It must be borne in mind that with such manifestations, the lamps themselves also fail, the malfunction of which can be detected by replacement, by connecting to the connectors for diagnostics that are known to be serviceable and suitable in power.
Repair of the inverter 75008448 can often be somewhat complicated by the use of special protection circuits, which are designed to disconnect it in emergency cases for fire safety during depressurization of lamps, or short circuits or breaks in high-voltage circuits and connections. Sometimes it becomes necessary for diagnostic purposes to block the protection circuits in order to be able to make the necessary measurements at the control points of the circuit.
When diagnosing with the protection off, special precautions must be taken, because there is a risk of failure of the power elements of the inverter. After the diagnosis, it is imperative to restore the protection circuits for the inverter to operate normally.
Attention to users! Self-repair of the TOSHIBA 26A3000P TV without the appropriate qualifications and experience can lead to its complete non-repairability!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 26/32/37/A3000P/A3030P - PE0300, PE0253, PE0287, PE0288
1. Service Manuals with Schematic Diagrams 2 of 2007 files on model
26A3030D, 26A3000P, 26A3032D, 26A3002P, 32A3030D, 32A3000P, 32A3032D, 32A3002P, 37A3030D, 37A3000P, 37A3032D, 37A3002P, 37A3003P, 42A3030D, 42A3000P, 26A3031D, 26A3001PR
2. Service Manuals with Schematic Diagrams 129 pages on models 26A3030D, 26A3000P, 32A3030D, 32A3000P, 37A3030D, 37A3000P, 42A3030D, 42A3000P.
The appearance of MainBoard PE0288 is shown in the figure below:PE0288
PE0288 can be used in TVs:
TOSHIBA 26A3000P (Panel LC260WX2 (SL)(E2) 75007721), TOSHIBA 26A3001PR (Panel V260B1-L01 75008418), TOSHIBA 32A3000P (Panel LC320WX1), TOSHIBA 32A3000PR (Panel LC320W01 (SL)(A1), TOSHIBA 37X3000PR (Panel LC370WU1 (SL)(03)), TOSHIBA 42A3000PR (Panel LC420WX7-SLC1 75008814).
Key Features of the TOSHIBA 26A3000P:
Installed matrix (LCD panel) LC260WX2 (SL) (E2) 75007721.
The matrix control uses the Timing Controller (T-CON) LC260WX2-SLE1.
An inverter 75008448 is used to power the backlight.
The necessary supply voltages for all nodes of the TOSHIBA 26A3000P TV are generated by the PE0300 power module, or its analogs using the STR-W6756, STR-W6765 microcircuits.
MainBoard - the main board (motherboard) is a PE0288 module, using CPU chips: TC90403FG; Scaler: FLI8541BE; and others.
The ENG37E01GF tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC260WX2-SLE2
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 575.769x323.712 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 9/9 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: 12 pcs EEFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
TOSHIBA 26A3000 LCD TV with LC260WX2 LCD, 26 "(66 cm) diagonal size 16: 9 format. 500 cd / m² screen brightness is provided by CCFL (EEFL) fluorescent lamps. The ratio of maximum brightness to minimum (contrast) is 800: 1. Dynamic contrast ratio of 2000: 1 is achieved by special control of the backlight. You can view images in high quality HD at a resolution of 1366x768 pixels in the standard for graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analog PA systems L, SECAM, NTSC. Graphic processing and digital signal generation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i.
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, audio x3, component, SCART x2, RGB, VGA, HDMI. 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.
The power consumed by the TV in the operating mode from the network is 118 watts.
Overall dimensions: with stand 666x514x275 mm, without stand 666x470x116 mm.
TV Weight: with stand: 13.3 kg, without stand: 10.8 kg.
Attention! The TOSHIBA 26A3000 LCD TV panel LC260WX2 (SL) (E2) is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!