Technical description and composition of the TOSHIBA 22SLDT3WR TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 22SLDT3WR
Chassis / Version: CMH143
Panel: V216B1-L01
PWM Inverter: MP1008-ES-LF-Z
Power Supply (PSU): CEH433B
PWM Power: FA5571N-D1
MOSFET Power: 2SK3532-01MR
MainBoard: CMH143 PCBF40
IC MainBoard: LA42052-E, BD9323EFJ DC-DC, BD7820FP-E2, NJM4565M, MM1501XNRE, DVD A52C01T650 DAV-RR933WR
Tuner: TDTG-S486D
Control: CEH437B
Technical Specifications 22SLDT3W
TOSHIBA 22SLDT3WR
General recommendations for repairing TV LCD
An external examination of the external and internal elements should be carried out in a timely manner before the start of operations for their dismantling. Often, by the visible signs of a change in the state of some elements, one can judge the causes of the defect. If ring cracks are detected in the soldered terminals of the elements or dangling connecting tracks, swollen capacitors or charred resistors - all this can be characteristic signs of the causes or consequences of an already known typical malfunction.
In the case when the 22SLDT3WR does not turn on, does not respond to the remote control and the front panel buttons, does not blink bulbs and does not show any signs of operability, the CEH433B power supply module is probably defective in this case. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power key (s) of the 2SK3532-01MR converter. The complete inoperability of the power supply unit can be caused by a short circuit in the power elements in the primary circuit, followed by an open fuse, or a short circuit in the loads.
As a rule, the keys in switching power supplies (SMPS) are reliable enough and rarely fail for no reason to be looked for by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is verified by replacing it with a known good one.
If the TOSHIBA 22SLDT3WR does not have an image, but there is sound, there is a possibility of a malfunction of the backlight or power converter. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working. When disabling protection in order to enable the diagnosis of a malfunction, special care should be taken, and after completion of all repair work, it is necessary to restore the circuit and the inverter protection for further safe operation of the TV.
If the motherboard CMH143 PCBF40 is faulty, first of all it is necessary to check all the linear stabilizers and power converters of its chips, as well as, if necessary, update the software (software). Sometimes you can check the health of MB only by replacement. In some cases, it is necessary to check or replace (if necessary) the elements of the MainBoard board - LA42052-E, BD9323EFJ DC-DC, BD7820FP-E2, NJM4565M, MM1501XNRE, DVD A52C01T650 DAV-RR933WR. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
The TDTG-S486D tuner malfunction is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Attention! For users and owners of 22SLDT3WR TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
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 22SLDT3WR device:
Installed matrix (LCD panel) V216B1-L01.
A converter controlled by the MP1008-ES-LF-Z PWM controller is used to power the backlight lamps.
The necessary supply voltages for all nodes of the TOSHIBA 22SLDT3WR TV are generated by the CEH433B power supply module or its analogs using FA5571N-D1 microchips and power switches of the 2SK3532-01MR type.
MainBoard - the main board (motherboard) is a CMH143 module, using microcircuits LA42052-E, BD9323EFJ DC-DC, BD7820FP-E2, NJM4565M, MM1501XNRE, DVD A52C01T650 DAV-RR933WR and others.
The TDTG-S486D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: CMO
Model: V216B1-L01
Type: a-Si TFT-LCD, Panel
Diagonal size: 21.6 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 477.417x268.416 mm
Brightness: 400 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 1.3 / 3.7 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V