Technical description and composition of the TOSHIBA 37A3000 TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 37A3000 37A3000PR
Chassis / Version: A3000P
Panel: AX094B002A REV A
T-CON: TCON102A-F
Inverter (backlight): HIU-811-M HPC-1651E-M, HIU-811-S
Power Supply (PSU): PE0252A V28A00032701
PWM Power: STR-Z4567, STR-W6765
MainBoard: PE0288 A V28A000447A1
IC MainBoard: CPU: TC90403FG; Scaler: FLI8541BE
Tuner: ENG37E01GF
Control: IR: V28A00044803 PE0287
Specifications 37A3000
TOSHIBA 37A3000
General recommendations for repairing TV LCD
Possible malfunctions
- The TOSHIBA 37A3000 TV does not turn on, does not respond to the remote control and the control panel buttons, the indicators do not light or flash.
In such cases, the PE0252A power supply is usually faulty. It is necessary to verify the presence of its output voltages and, if they are completely absent, check the power switches and rectifier diodes for a probable short circuit.
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power 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, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM microcircuits STR-Z4567, STR-W6765 are usually checked by replacing with new, or obviously working.
- There is no image, there is sound, it responds to the remote. Or the image may appear for a second when turned on and immediately disappears.
These manifestations can be triggered by a power module, or by defects in the inverter, as well as a distortion of the currents in the lamps due to their uneven wear. After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, it is necessary to ring in its converter the power switches for breakdown and the secondary windings of the transformers for an open.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- 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 PE0288 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). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - CPU: TC90403FG; Scaler: FLI8541BE and failed chips replace with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
Before changing the tuner ENG37E01GF, if there is no possibility of tuning to television channels, you should make sure that there are supply voltages, which 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
TV users and owners need to remember that attempts to self-repair a TOSHIBA 37A3000 TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> TOSHIBA 37A3000 Chassis A3000P
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).
The appearance of the power supply
Key Features of the TOSHIBA 37A3000:
Installed matrix (LCD-panel) AX094B002A REV A.
The matrix control uses the TCON102A-F Timing Controller (T-CON).
To power the backlight used inverter HIU-811-M.
The necessary supply voltages for all nodes of the TOSHIBA 37A3000 TV are generated by the PE0252A power module or its analogs using the STR-Z4567, 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.
Briefly from the TV: LCD, 37 ", 1366x768, 720p HD, sound: 20 watts.
The composition uses MainBoard PE0288 A V28A000447A1 and LCD-panel AX094B002A REV A.
Power Supply Unit (PSU) PE0252 V28A00032701 Power Supply.
TOSHIBA 37A3000 LCD TV with AX094B002A LCD, 37 "(94 cm) diagonal display in 16: 9 format. 500 cd / m² screen brightness is provided by CCFL (EEFL) fluorescent lamps. The ratio of maximum brightness to minimum (contrast) is 1000: 1. It is possible to 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 takes place in stand artworks 480i, 480p, 576i, 576p, 720p, 1080i.
The power of the sound speaker system 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 177 watts.
Overall dimensions: with stand 920x661x300 mm, without stand 920x614x122 mm.
TV Weight: with stand: 21.8 kg, without stand: 18.4 kg.
Attention! The AX094B002A REV A panel of the TOSHIBA 37A3000 LCD TV is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!