Technical description and composition of the TOSHIBA 26SLDT3 TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 26SLDT3
Panel: V260B1-L11 Rev. C1
Inverter (backlight): VIT70063.50 REV: 3
PWM Inverter: OZ964GN (20) LM339A (14)
MOSFET Inverter: P2504BDG, P4404EDG
Power Supply (PSU): CEG376C
PWM Power: SSC9500, MIP2K4
Mainboard: CMH144A
IC MainBoard: R8J66955BG, 24LC256, ATMLH920, AT25DF321, AN17808B
Tuner: ENG36E18KRF
Control: SE-R0319
Specifications 26SLDT3
TOSHIBA 26SLDT3
General recommendations for repairing TV LCD
Repair of the TOSHIBA 26SLDT3 must begin with the diagnosis of the malfunction and a thorough inspection of its external and internal components, including the case ones. Often, for certain external signs, the repairman can draw some conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are made, which will determine the further algorithm for troubleshooting and localizing the defect. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
Malfunctions of the CEG376C power module can be expressed in different ways, for example, the TOSHIBA 26SLDT3 does not turn on at all and the control lamps on its front panel do not light up and do not blink, there are no signs of operability. If the mains fuse is broken in the power supply, in most cases a breakdown of the power switch is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
Power switches in flyback converters fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The reason may be a malfunction of the PWM controller SSC9501, MIP2K4, which can only be checked by replacing it with a new or obviously working one.
Diagnostics of power modules with a Power Factor Corrector (CMC) is somewhat more complicated and requires a more detailed approach.
If there is no image when you turn on the TOSHIBA 26SLDT3, or it appears for a second and disappears completely, but there is sound, most likely either the backlight or their power converter (inverter) are faulty. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the general power supply unit.
Diagnostics and repair of the inverter are often complicated by the organization of special protection circuits, which is necessary for fire safety and turns off the inverter in any emergency situation, for example, when the lamps are worn or depressurized. Often, to localize a defect, its blocking is required.
In such cases, the risk of failure of the power elements of the inverter is most likely, and special care is required during work, and after their completion, it is necessary to restore the protection circuit for further safe operation of the TV by the owner in normal mode.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements R8J66955BG, 24LC256, ATMLH920, AT25DF321, AN17808B.
If you suspect a malfunction of the ENG36E18KRF tuner, first of all, you need to make sure that the voltage of the varicaps (30-33V) is present on the corresponding output of the tuner, as well as other voltage supplying it.
Remember! Attempts by users to repair the TOSHIBA 26SLDT3 TV without proper qualifications and necessary experience can lead to serious negative consequences!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 15SLDT3R, 19SLDT3R, 22SLDT3R, 26SLDT3R
The appearance of the MainBoard CMH144A is shown in the figure below:CMH144A
CMH144A can be used in TVs:
TOSHIBA 26SLDT3 (Panel V260B1-L11 Rev.C1), TOSHIBA 26SLDT3R (Panel T260XW02 V.P).
Main features of the TOSHIBA 26SLDT3 device:
Installed matrix (LCD panel) V260B1-L11 Rev. C1.
To power the backlight, an inverter VIT70063.50 is used, it is controlled by the PWM controller OZ964GN (20) LM339A (14). As power elements of the inverter, keys of the type P2504BDG, P4404EDG are used.
The necessary supply voltages for all nodes of the TOSHIBA 26SLDT3 TV are generated by the CEG376C power module or its analogs using SSC9500, MIP2K4 microcircuits.
MainBoard - the main board (motherboard) is a CMH144A module, using R8J66955BG, 24LC256, ATMLH920, AT25DF321, AN17808B, and others.
The ENG36E18KRF tuner provides TV reception and channel tuning.
Information from an alternative source:
TOSHIBA 26SLDT3
Panel Type (Matrix): V260B1-L11 Rev. C1
Motherboard: CMH144A, Scaler R8J66955BG, EEPROM 24LC256, ATMLH920, AT25DF321, AN17808B, Tuner: ENG36E18KRF
Invertor: VIT7006350 REV: 3, OZ964GN,
PSU: CEG376C ETL-XPC-204T, SSC9501, MIP2K4
Remote control: SE-R0319, TOSHIBA 19-22SLDT3
Additional technical information about the panel:
Brand: CMO
Model: V260B1-L11
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 575.769x323.712 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.2M (6-bit + FRC), CIE1931 72%
Response Time: 3/5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 5 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
TOSHIBA 26SLDT3 LCD TV with T260XW02 LCD display, 26 "(66 cm) diagonal size 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 800: 1. Dynamic contrast ratio of 1600: 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 of 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. Supported media file formats: MP3, WMA, MPEG4, VideoCD, SVCD, JPEG.
The power of the sound system 20 W (2x10 W) provides 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, component, RGB, VGA. 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.
The power consumed by the TV in the operating mode from the network is 92 watts.
Overall dimensions: with a support 681x514x214 mm, without a support 681x470x99 mm.
TV mass: with stand: 8.8 kg, without stand: 8.2 kg.
Attention! The T260XW02 V.P panel of the TOSHIBA 26SLDT3 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!