Technical description and composition of the TOSHIBA 26HL86 TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 26HL86
Chassis / Version: 2585
Panel: T260XW02 V.5
T-CON: T260XW02 V2 ou V315XW01 V5
LED driver (backlight): VIT71014.50
PWM LED driver: OZ964SN (20pin)
Trans LED driver: T51-0084-211
Power Supply (PSU): PE0028 V28A00000401, V28A00000402
PWM Power: STR-W6765, STK8050E
MainBoard: PE0102 V28A00009601 A5A001750010A (PE0081)
Tuner: ENG36A37GF
Specifications 26HL84
TOSHIBA 26HL86
General repair guidelines for TV LCD LED
TOSHIBA 26HL86, like other televisions, it is advisable to start repairing with a careful examination of the external and internal elements and modules. In some cases, visible external damage to the elements can suggest the direction of troubleshooting and localization of the defect even before the start of the necessary measurements at the control points of the nodes of electronic circuits. 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.
If the TOSHIBA 26HL86 does not turn on, no control lights on the front panel light up or blink, therefore, there is a very high probability of a malfunction of the power module V28A00000401 e V28A00000402 (PE0028). In some cases, only the processor power regulator may be faulty. In the general case, first of all, it is necessary to check the electrolytic capacitors of the secondary rectifier filters and 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 converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Possible options.
Mos-Fet keys used in switching power supplies (SMPS) rarely fail for no reason to look for when checking other circuit elements. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip can also cause a breakdown of the power switch of the converter.
If the TOSHIBA 26HL86 does not have an image but there is sound, the backlight LEDs on the T260XW02 V.5 panel or their power converter may malfunction. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
Often there is a need for disassembling the panel to check the health of the LEDs, as well as contact connections in the connectors and soldering.
A break in the line of LEDs connected in series cannot be detected with a multimeter or tester without disassembling the panel. To open all the transitions, several tens of volts are needed, and it is best to use a current source for such purposes.
Diagnosis and repair of the motherboard V28A00009601 (PE0102) e A5A001750010A (PE0081) is carried out by checking the performance of the stabilizers or power converters of the module chips. In some cases, a software update is required.
It should be remembered! Attempts to repair the TOSHIBA 26HL86 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> PE0028 Power supply.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 26HL86
The appearance of MainBoard PE0102 is shown in the figure below:
PE0102
The appearance of the power supply
Key Features of the TOSHIBA 26HL86:
Installed matrix (LED-panel) T260XW02 V.5.
The matrix control uses the Timing Controller (T-CON) T260XW02.
The VIT71014.50 LED driver is used to power the backlight LEDs, it is controlled by the OZ964SN PWM controller (20pin). The transformer T51-0084-211 is installed in the converter of the LED driver.
The necessary supply voltages for all nodes of the TOSHIBA 26HL86 TV are generated by the PE0028 power module, or its analogs using the STR-W6765, STK8050E microcircuits.
MainBoard - the main board (motherboard) is a PE0102 module.
The ENG36A37GF tuner provides television 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 26HL84 LCD TV with 26 "(66 cm) diagonal LCD 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 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 standards 48 0i, 480p, 576i, 576p, 720p, 1080i.
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, S-Video x2, component x2, DVI HDCP. 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.
Overall dimensions: with stand 691x579x308 mm, without stand 691x513x125 mm.
TV Weight: with stand: 31.5 kg, without stand: 26.5 kg.
Attention! The TOSHIBA 26HL84 LCD TV panel is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!