Technical description and composition of the TOSHIBA 26WL65R TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 26WL65R
Panel: T260XW02 V5
T-CON: T315WX01_05 Ctrl / T260WX02, AUO-016K1, 7642ILTZ
LED driver (backlight): VIT71014.50 LOGAH Rev: 2 (8lamp) 75008435
PWM LED driver: OZ964SN (pl20n) LM393 (8) 388622 (14) LM358 (8)
MOSFET LED driver: D454, D413
Trans LED driver: T51.0084.211 L26H306H
Power Supply (PSU): PE0028 M-2 V28A00000402, PE0028M-1 V28A00000401
PWM Power: STR-W6765, STK8050E
MainBoard: PE0078 B1 V28A00004501, A5A001750010, SIGNAL (PE0081)
IC MainBoard: TA2024, MSP3410A, T5CB5-6G52,
Tuner: ENG39A07GF
Specifications 26WL65R
TOSHIBA 26WL65R
General repair guidelines for TV LCD LED
Repair of the TOSHIBA 26WL65R TV should begin with a fault diagnosis, which involves a careful examination of the external and internal elements of the device. Often, by the external signs and nature of the damage to the elements, it becomes possible to draw some conclusions and determine a further algorithm for finding a defect before making the necessary measurements at control points. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in solders will help the master to guess the causes and possible consequences of the malfunction.
In cases when the TOSHIBA 26WL65R TV does not turn on, does not respond to the remote control and buttons, any indicators on the front panel do not light up and do not blink, and there are no sounds and no signs of operability at all, the PE0028M-2 V28A00000402 power supply module is most likely to be faulty, PE0028M-1 V28A00000401 or there is no processor power on the motherboard (a typical defect of some TOSHIBA TVs). When diagnosing and repairing the power supply, after replacing the swollen capacitors of the secondary rectifier filters (if any), you must first check the mains fuse. When it is broken, the power elements of transistors and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
It should be remembered that in the practice of repair, usually the power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the STRW6765, STK8050E PWM controller chip itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
If the TOSHIBA 26WL65R does not have an image, but there is sound and the TV is controlled by the remote control, a malfunction in the backlight circuits of the T260XW02 V5 panel is likely. The LEDs or the power converter - LED driver may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the LED driver, and check the LEDs, connecting obviously known good diagnostics.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of the contact connections in the rulers and connectors.
It should be remembered that it is not possible to determine the open circuit in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required.
On the motherboard PE0078 B1 V28A00004501, A5A001750010, SIGNAL (PE0081), in the event of a malfunction, you should first check the operation of all the stabilizers or power converters of the microcircuits and, if necessary, update the software (software).
Board repair and replacement of TA2024, MSP3410A, T5CB5-6G52 microcircuits are carried out with the necessary equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
The malfunction of the ENG39A07GF tuner is established after checking the software and all the supply voltages at its terminals, including the varicap supply voltage (30-33V).
Attention to the owners! Attempts to self-repair the TOSHIBA 26WL65R TV are not recommended by the manufacturer and can lead to serious negative consequences!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> PE0028 Power supply
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 26WL65R. Main PE0081
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 26WL65, 26WL66. Main PE0119
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 26WL66E
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> PE0117, PE0216, PE019 Toshiba 26WL66E, 26WL66T, 26WL66R, 26WL66A, 32WL66E, 32WL66T, 32WL66R, 32WL66A, 37WL66E, 37WL676T, 37WL66R. PE0117 - PE0216 - PE019
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 26WL65R device:
Installed matrix (LED-panel) T260XW02 V5.
The matrix control uses the Timing Controller (T-CON) T315WX01_05.
The LED driver VIT71014.50 is used to power the backlight LEDs, it is controlled by the OZ964SN (pl20n) LM393 (8) 388622 (14) LM358 (8) PWM controller. The transformer T51.0084.211 L26H306H is installed in the converter of the LED driver. 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 26WL65R TV are generated by the power supply module PE0028, or its analogs using microcircuits STR-W6765, STK8050E.
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
Brand: TOSHIBA, Model: 26WL65R.
Short from TV: LCD, 26 ", 1366x768, 720p HD, sound: 20 watts.
The composition includes MainBoard PE0119 V28A000163A1, PE0265 V28A00028201 and LCD panel (matrix) T260XW02 V.5.
Power Supply Unit (PSU) PE0117 V28A00016401 Power Supply.
TOSHIBA 26WL65R LCD TV with T260XW02 LCD, 26 "(66 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 800: 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 the standard max 480i, 480p, 576i, 576p, 720p, 1080i, 1080p.
The power of the sound speaker system 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 V.5 panel of the TOSHIBA 26WL65R 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!