Technical description and composition of the TOSHIBA 22SLDT3W TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 22SLDT3W
Panel: M185XW01 V0
Power Supply (PSU): PCB240 AE017390 A52U05C240 POWER PCB ASS'Y CEH434A
MainBoard: CMH143 PCBF40
IC MainBoard: CPU: ZR36966ELCG-D-G (DVD); Scaler: VCT6973G-FA-B3-000; EEPROM: AT24C256BN; SOUND: LA42052;
Tuner: TDTG-S486D
Control: SE-R0337 AE016599 076D0PT020 TRANSMITTER
Technical Specifications 22SLDT3W
TOSHIBA 22SLDT3W
General recommendations for repairing TV LCD
Fault diagnosis and repair of the TOSHIBA 22SLDT3W, as well as other electronic devices, is recommended to start with an external inspection of the external and internal elements. A visible physical change in some components can sometimes suggest a further troubleshooting direction. 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.
In the absence of any signs of operability, when the TOSHIBA 22SLDT3W does not turn on and does not signal anything with the control lights on the panel, there is a possibility of a malfunction of the PCB240 AE017390 A52U05C240 POWER PCB ASS'Y CEH434A TV power module. In the absence of swollen filter capacitors of the secondary rectifiers, the diagnostics of the power supply should be started by checking the fuse and, if it is broken, it is first necessary to check all the power semiconductor elements of the primary circuit - diodes and transistors for the possibility of an avalanche or thermal breakdown.
If the power keys of the pulse converter are not equal, you should pay attention to other elements in their bundling, which may be the result or cause of their breakdown.
If the TOSHIBA 22SLDT3W does not have an image, there is sound and the channels are switched, there is a possibility of a malfunction of the display backlight, or their power converter - inverter. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the inverter itself, including in the secondary rectifier of the main PSU. Turning off the protection for diagnostic purposes, it must be remembered that in this case there is a risk of failure of the power elements of the inverter. Upon completion of the diagnosis, all regular protection circuits should be restored.
On the CMH143 PCBF40 motherboard, in case of a malfunction, you should first check the operation of all the stabilizers and power converters of the microcircuits, and also, if necessary, update the software (software). In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - CPU: ZR36966ELCG-D-G (DVD); Scaler: VCT6973G-FA-B3-000; EEPROM: AT24C256BN; SOUND: LA42052; to new or obviously serviceable. In cases where BGA technologies are used, defects are usually localized by the heating method.
Before changing the tuner TDTG-S486D, if it is not possible to tune to television channels, make sure that there are supply voltages that must be measured at the corresponding terminals of the tuner and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
Attention to users! Independent repair of the TOSHIBA 22SLDT3W TV without the appropriate qualifications and experience can lead to its complete non-repairability!
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 22SLDT3W device:
Installed matrix (LCD panel) M185XW01 V0.
The formation of the necessary supply voltages for all nodes of the TOSHIBA 22SLDT3W TV is carried out by the PCB240 power module, or its analogues.
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.
Additional technical information about the panel:
Brand: AUO
Model: M185XW01 V0
Type: a-Si TFT-LCD, Panel
Diagonal size: 18.5 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 409.8x230.4 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 3.6 / 1.4 (Tr / Td)
Frequency: 60Hz
Lamp Type: 2 pcs CCFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V