Technical description and composition of the TOSHIBA 32CV700 TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 32CV700
Panel: LTA320AP15
Inverter (backlight): integrated into PSU
Power Supply (PSU): PSIV161C01T
PWM Power: STR-W6052S
MainBoard: V28A00112301
IC MainBoard: MST6B884JL-LF-3, MX25L1605, 24C64. CXB1446AR, HJ50U281622FTP-4
Tuner: TDTC-G432D
Control: CT-90336
Specifications 32CV700
TOSHIBA 32CV700
General recommendations for repairing TV LCD
Possible manifestations of defects
- The TOSHIBA 32CV700 TV does not turn on, does not respond to the remote control and buttons on the control panel, and does not blink with any indicators.
With such manifestations, a malfunction is most likely to be detected in the PSIV161C01T power supply module. It is necessary to measure the output voltages in the secondary circuits, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for a short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during a short circuit in the elements of the primary circuit, the mains fuse usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, power supply, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback. PWM chip STR-W6052S can also cause a malfunction of the power switch of the converter and is checked by replacement.
- There is no image, there is sound, it responds to the remote. Or the image may appear for a second when turned on and immediately disappears.
These manifestations can be triggered by a power module, or by defects in the inverter, as well as a distortion of the currents in the lamps due to their uneven wear. If all the electrolytic capacitors of the filter according to the inverter power supply are serviceable, you should make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during work, and after they are finished, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The indicator on the front panel blinks, the TV does not turn on in operating mode, it does not respond to the remote control.
Repair or diagnostics of the V28A00112301 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuits and matrix. If necessary, update or replace the software (software). Sometimes they require checking or replacing (if necessary) the elements of the MainBoard board - MST6B884JL-LF-3, MX25L1605, 24C64. CXB1446AR, HJ50U281622FTP-4. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
If a TDTC-G432D tuner is suspected of malfunction, first of all, it is necessary to verify the correctness of the software, as well as the presence of the necessary supply voltage levels and data exchange pulses with the processor via the I2C bus at the corresponding tuner pins.
TV users and owners need to remember that attempts to repair a TOSHIBA 32CV700 TV independently without the appropriate qualifications and necessary experience can lead to serious negative consequences!
The appearance of the MainBoard V28A00112301 is shown in the figure below:
V28A00112301
V28A00112301 can be used in TVs:
TOSHIBA 32CV700 (Panel LTA320AP15), TOSHIBA 40AV700V (Panel LTA400HM04).
Key Features of the TOSHIBA 32CV700:
Installed matrix (LCD-panel) LTA320AP15.
To power the backlight, a converter is used, combined with a power supply.
The necessary supply voltages for all nodes of the TOSHIBA 32CV700 TV are generated by the PSIV161C01T power module or its analogs using STR-W6052S microcircuits.
MainBoard - the main board (motherboard) is a module V28A00112301, using microchips MST6B884JL-LF-3, MX25L1605, 24C64. CXB1446AR, HJ50U281622FTP-4 and others.
The TDTC-G432D tuner provides television reception and channel tuning.
Information from an alternative source:
TOSHIBA 32CV700
Panel Type (Matrix): LTA320AP15,
Motherboard: V28A00112301, MST6B884JL-LF-3, MX25L1605, 24c64, CXB1446AR, HJ50U281622FTP-4, Tuner: TDTC-G432D
PSU & Invertor: PSIV161C01T, STR-W6052S
Remote control: CT-90336
Trademark: TOSHIBA, Model: 32CV700.
Shortly from the TV: LCD, 32 ", 1366x768, 720p HD, sound: 20W, HDMI connectors: 4.
The composition uses MainBoard V28A00112301 and an LCD panel (matrix) LTA320AP15.
Power Supply Unit (PSU) PSIV161C01T Power Supply.
TOSHIBA 32CV700 LCD TV with LTA320AP15 32 ”(81 cm) LCD display in 16: 9 format. The brightness of the screen is 450 cd / m² by CCFL (EEFL) fluorescent lamps. The ratio of maximum brightness to minimum (contrast) is 4500: 1. Dynamic contrast ratio of 50,000: 1 is achieved by special control of the backlight. 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 an analog system . PAL, SECAM, NTSC Image processing and the formation of the digital signal is in 480i standards, 480p, 576i, 576p, 720p, 1080i, 1080p Supported multimedia file formats:. JPEG.
The power of the sound system 20 W (2x10 W) provides 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, component, VGA, HDMI x4, USB. 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.
The power consumed by the TV in the operating mode from the network is 92 watts.
Overall dimensions: with stand 786x579x258 mm, without stand 786x525x78 mm.
TV Weight: with stand: 12.5 kg, without stand: 9.2 kg.
Attention! The TOSHIBA 32CV700 LCD TV panel LTA320AP15 is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!