Technical description and composition of the TOSHIBA 22SLDT3R TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 22SLDT3R
Panel: 22 inch
Inverter (backlight): UA-2600-1-LF REV: X5 LITEON
PWM Inverter: OZ9933GN
MOSFET Inverter: 4525GEN
Power Supply (PSU): LITEON UA-2600-1-LF REV: X5
PWM Power: LD7576PS (SOIC8).
MOSFET Power: K3265
MainBoard: CMH143 PCBF40
IC MainBoard: CPU: ZR36966ELCG-D-G (DVD); Scaler: VCT6973G-FA-B3-000; EEPROM: AT24C256BN; SOUND: LA42052
Tuner: TDTG-S486D
Technical Specifications 22SLDT3W
TOSHIBA 22SLDT3R
General recommendations for repairing TV LCD
Like any other TV, TOSHIBA 22SLDT3R repair is advisable to start with an external examination of the visible changes in the external and internal elements. It often happens that some damage to elements or connections will help determine the correct direction of troubleshooting and localization of the defect. Electrolytic capacitors of filters with a swollen casing, as well as ring cracks formed in the soldered leads of heating elements, or a layer of coal on burnt resistors sometimes tell the repairman the causes of the malfunction and possible consequences.
Sometimes the TOSHIBA 22SLDT3R TV simply does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is the failure of the LITEON UA-2600-1-LF REV: X5 common power module. If the mains fuse is cut off in the power supply, in most cases a breakdown of the K3265 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.
In most cases, a breakdown of the N-Fet converter key does 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 D7576PS (SOIC8). from the manufacturer.
Diagnostics of power modules with a Power Factor Corrector (CMC) is somewhat more complicated and requires a more detailed approach.
If the TOSHIBA 22SLDT3R TV does not have an image, but there is sound, the malfunction should be sought in the backlight lamp power converter (inverter). It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the PSU (power supply) for an overstated ESR.
Diagnostics of the UA-2600-1-LF REV: X5 LITEON inverter can be difficult due to the protection being triggered, which is organized by the designers to prevent negative consequences or fires in emergency cases, for example, during short circuits or open circuits in the lamp power supply circuit, as well as their possible depressurization. To make the necessary measurements at control points or to take the necessary waveforms, repairmen have to block the protection circuits in order to be able to diagnose.
All necessary precautions must be observed when disabling the inverter protection during diagnostics and not leaving it disconnected after the repair is completed.
It should be remembered! Attempts to repair the TOSHIBA 22SLDT3R 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 ------------------> Toshiba 15SLDT3R, 19SLDT3R, 22SLDT3R, 26SLDT3R
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> 19SLDT3, 22SLDT3. DMH104A, CMH143A, CEH447A, CEH434A, CEH433B
The appearance of the MainBoard CMH143 is shown in the figure below:CMH143
CMH143 can be used in TVs:
TOSHIBA 19SLDT3RW (Panel M185XW01 V0), TOSHIBA 22SLDT3R (Panel 22 inch), TOSHIBA 22SLDT3W (Panel M185XW01 V0), TOSHIBA 22SLDT3WR (Panel V216B1-L01).
Main features of the TOSHIBA 22SLDT3R device:
Installed matrix (LCD panel) 22 inch.
The UA-2600-1-LF inverter is used to power the backlight, controlled by the OZ9933GN PWM controller. As power elements of the inverter, keys of type 4525GEN are used.
The necessary supply voltages for all nodes of the TOSHIBA 22SLDT3R TV are generated by the LITEON power module or its analogs using LD7576PS (SOIC8) microcircuits. and power keys type K3265.
MainBoard - the main board (motherboard) is a CMH143 module using CPU chips: ZR36966ELCG-D-G (DVD); Scaler: VCT6973G-FA-B3-000; EEPROM: AT24C256BN; SOUND: LA42052 and others.
The TDTG-S486D tuner provides TV reception and channel tuning.
TOSHIBA 22SLDT3W LCD TV with V216B1-L01 LCD, 22 "(55 cm) diagonal display size 16: 9. 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 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 occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i. Supported formats multimedia files: MP3, WMA, MPEG4, VideoCD, SVCD , JPEG.
The power of the sound system 3 W (2x1.5 W) provide two speakers. The audio processing system NICAM STEREO is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x3, S-Video, component, 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 50 watts.
Overall dimensions: with a support 550x407x207 mm,.
TV Weight: 5.4 kg.
Attention! The TOSHIBA 22SLDT3W LCD TV panel V216B1-L01 is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!