Technical description and composition of the TOSHIBA 22L1354R TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 22L1354R
Chassis / Version: 17MB95-2.1
Panel: LM215WF4 TL G1
LED driver (backlight): 17IPS61-3
PWM LED driver: MPS1306 / MP3394S,
Power Supply (PSU): 17IPS61-2
PWM Power: ICE3BR0665J (Standby)
MainBoard: 17MB95-2.1
IC MainBoard: RT7240 (8), LR1812DHG (8), TPS65251 (10x10)
Control: RC-1910
Specifications 22L1354
TOSHIBA 22L1354R
General repair guidelines for TV LCD LED
Repair and diagnostics of any electronic device, in particular TOSHIBA 22L1354R, it is advisable to start with a careful external examination of internal and external elements. Visible damage to elements can sometimes indicate the direction of the search for a defect even before the necessary measurements are taken. In most cases, the repairman can guess the causes of the defect and possible consequences by the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of element leads, swollen rectifier filter capacitors, charred resistors and other circuit elements.
Faults in the 17IPS61-2 power module can be expressed in different ways, for example, the TOSHIBA 22L1354R does not turn on at all and the control lamps on its front panel do not light up and do not blink, and there are no signs of operability. It should be noted that with the same external manifestations, the processor power regulator (converter) 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.
In most cases, key breakdowns in switching power supplies (SMPS) do not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM ICE3BR0665J chip from the manufacturer.
If the TOSHIBA 22L1354R lacks an image but has sound, the backlight LEDs of the LM215WF4 TL G1 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.
When diagnosing, it is necessary to take into account that it is impossible to check the open in the chain of LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally, a current source.
Repair of the 17MB95-2.1 motherboard must begin with the diagnosis and verification of all linear stabilizers or power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM.
If it is not possible to replace the MB (SSB) card, you need to check the health of its elements - RT7240 (8), LR1812DHG (8), TPS65251 (10x10). Defective components should be replaced.
Owners and users of the TOSHIBA 22L1354R TV must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba - Vestel Main 17MB95-2
To reduce the backlight current in LED drivers with the MP3394S (MP3394) controller, increase the resistance of the resistor from pin 6 (ISET) to the chassis. The maximum current in each channel (in milliamperes) for the Rset resistor (in kilo-ohms) is determined from the ratio 790 * 1.23V / (Rset + 0.4).
The appearance of the MainBoard 17MB95-2.1 is shown in the figure below:
17MB95-2.1
17MB95-2.1 can be used in TVs:
PHILIPS 40PFL3018T/12 (Panel VES400UNDS-01), TELEFUNKEN L32H125A3 (Panel VES315WNEA-01-B), TOSHIBA 22L1353R (Panel LM215WF4), TOSHIBA 22L1354R (Panel LM215WF4 TL G1), TOSHIBA 40L1353N (Panel LTA400HM23).
The appearance of the power supply
Main features of the TOSHIBA 22L1354R device:
Installed matrix (LED panel) LM215WF4 TL G1.
The LED driver 17IPS61-3 is used to power the backlight LEDs, it is controlled by the MPS1306 / MP3394S PWM controller,.
The necessary supply voltages for all nodes of the TOSHIBA 22L1354R TV are generated by the 17IPS61-2 power module or its analogs using ICE3BR0665J (Standby) microcircuits.
MainBoard - the main board (motherboard) is a 17MB95-2.1 module, using RT7240 (8), LR1812DHG (8), TPS65251 (10x10) and others.
Additional technical information about the panel:
Brand: LG Display
Model: LM215WF4-TLG1
Type: a-Si TFT-LCD, Panel
Diagonal size: 21.5 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 476.064x267.786 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 1.3 / 3.7 (Tr / Td)
Frequency: 60Hz
Lamp Type: 14S2P WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
TOSHIBA 22L1354 LED TV with LM215WF4 LCD display, diagonal size 22 "(56 cm) in 16: 9 format. The required screen brightness of 300 cd / m² is provided by LED backlight LED. The ratio of maximum brightness to minimum (contrast) is 1000: 1 Dynamic contrast ratio of 20,000: 1 is achieved by special control of the LEDs operation.This model uses side illumination from Edge LEDs.The design and technical capabilities of the TV include viewing programs and movies in high quality HD at a resolution of 1920x1080 pixels in graphic decomposition according to the standard 1080p (Full HD). 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, 1080p. Supported media file formats: MP3, MKV, JPEG.
The power of the speaker system of sound 5 W (2x2.5 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, component, SCART, VGA, HDMI, USB x2. 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, 1280x1024, 1360x768.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
The power consumed by the TV in the operating mode from the network is 30 watts.
Overall dimensions: with stand 518x358x163 mm, without stand 518x321x46 mm.
TV Weight: 4.7 kg.
Attention! The LM215WF4 TL G1 panel of the TOSHIBA 22L1354 LED TV is an expensive and unreliable element.
Avoid any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also unsafe to get liquid on the screen. Sometimes one drop is enough if it flows down the glass onto the cables so that the TV becomes unrepairable.