Technical description and composition of the TOSHIBA 26WL66R TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 26WL66R
Panel: T260XW02 V5
T-CON: 75009034 T315XW01 V5; 7642ILTZ
LED driver (backlight): VIT71014.50 75008435
PWM LED driver: OZ964SN
MOSFET LED driver: D454, D413
Power Supply (PSU): PE0028 M2 V28A00000402, PE0028 M-1 V28A00000401
PWM Power: STR-W6765, STK8050E
MainBoard: PE0078 B-1 V28A00004501
IC MainBoard: TA2024, MSP3410A, T5CB5-6G52
Tuner: ENG39A07GF
Specifications 26WL66R
TOSHIBA 26WL66R
General repair guidelines for TV LCD LED
Repair of the TOSHIBA 26WL66R TV should begin with a fault diagnosis, which involves a careful examination of the external and internal elements of the device. Specific external damage to some elements can sometimes indicate further actions to determine the malfunction of the TV and localize the defect before the necessary measurements are taken. 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.
If the power supply module PE0028 M2 V28A00000402, PE0028 M-1 V28A00000401 fails, the external manifestations may be different, for example, the TOSHIBA 26WL66R does not turn on at all and there is no indication of the indicator lights on the front panel. With the same symptoms, the stabilizer (converter) of the power supply to the control processor may be faulty. Diagnostics and repair of the common power supply should always begin with a check of the mains fuse and the condition of the electrolytic capacitors of the secondary rectifier filters. Defective and swollen capacitors should be replaced with new ones. If the fuse breaks, it is advisable to check for a breakdown, first of all, all the power semiconductor elements of the converter and the diode bridge of the rectifier network, as well as the large electrolytic capacitor of the filter of the rectifier network.
As a rule, the keys in switching power supplies (SMPS) are reliable enough and rarely fail for no reason to be looked for by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is verified by replacing it with a known good one.
If, when you turn on the TV, the image appears and immediately disappears, or is absent initially when you turn on, but the sound is there and other functions work, there is a high probability of a malfunction of the LED driver (T260XW02 V5 panel backlight LED power converter). In such cases, the general power module is also subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the LED driver should be checked.
To check the health of the LEDs and contact connections in their power circuit, the panel must be disassembled.
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.
Diagnosis and repair of the motherboard PE0078B-1 V28A00004501 is carried out by checking the operability of the stabilizers or power converters of the module chips. In some cases, a software update is required.
In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - TA2024C (36) which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
If you suspect a malfunction of the ENG39A07GF 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.
Attention! For users and owners of 26WL66R TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> PE0028 Power supply
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 26WL66E, 26WL66T, 26WL66R, 26WL66A, 32WL66E, 32WL66T, 32WL66R, 32WL66A, 37WL66E, 37WL676T, 37WL66R. PE0117 - PE0216 - PE0119
Service Manuals with Schematic Diagrams 60 pages 2006 on model 26WL66R, 32WL66R, 37WL66R
The appearance of MainBoard PE0078 is shown in the figure below:PE0078
PE0078 can be used in TVs:
TOSHIBA 26WL65R (Panel T260XW02 V5), TOSHIBA 26WL66R (Panel T260XW02 V5).
The appearance of the power supply
Main features of the TOSHIBA 26WL66R device:
Installed matrix (LED-panel) T260XW02 V5.
The matrix control uses the Timing Controller (T-CON) 75009034.
The LED driver VIT71014.50 is used to power the backlight LEDs, it is controlled by the OZ964SN PWM controller. As power elements of the LED driver, keys of the type D454, D413 are used.
The necessary supply voltages for all nodes of the TOSHIBA 26WL66R TV are generated by the PE0028 power supply module or its analogs using STR-W6765, STK8050E microcircuits.
MainBoard - the main board (motherboard) is a PE0078 module, using chips TA2024, MSP3410A, T5CB5-6G52 and others.
The ENG39A07GF tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T260XW02 V5
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1366x768, WXGA
Display Mode: VA, Normally Black, Transmissive
Active Area: 575.769x323.712 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 15/5 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: 8 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
TOSHIBA 26WL66R LCD TV with T260XW02 LCD, 26 "(66 cm) diagonal, 16: 9 format. The ratio of maximum brightness to minimum (contrast) is 800: 1. You can view images in high quality HD at a resolution of 1366x768 pixels in standard for 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.
The power of the acoustic system of sound 20 W (2x10 W) provide 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 x4, S-Video, component x2, 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 operating mode from the network is 121 watts.
Overall dimensions: with stand 660x535x275 mm, without stand 660x484x117 mm.
TV Weight: with stand: 19.5 kg, without stand: 14.5 kg.
Attention! The T260XW02 V5 panel of the TOSHIBA 26WL66R 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!