Technical description and composition of the TOSHIBA 40LV833RB TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 40LV833RB
Chassis / Version: 32AV833
Panel: V400H1-L10
T-CON: MV-0E88441
Inverter (backlight): ETL-XPC-204T
PWM Inverter: AP11421SN (28)
MOSFET Inverter: AO D4184
Power Supply (PSU): PE-3201-01UN-LF
PWM Power: A6069H, FSFR1800
MainBoard: 32AV833 Rev 1.03 WIF778 V1.02 P5
IC MainBoard: MSD3704PX-LF-SA
Tuner: TDTK-G641D
Control: Remote: CT-90326, IR: 32AV833-IRLED HXF-S
Specifications 40LV833
TOSHIBA 40LV833RB
General recommendations for repairing TV LCD
It is advisable to start any repair and diagnostics of the TOSHIBA 40LV833RB TV with a careful external examination of the internal and external elements, including case parts, display, buttons and cables. It often happens that some damage to elements or connections will help determine the correct direction of troubleshooting and localization of the defect. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in solders will help the master to guess the causes and possible consequences of the malfunction.
If the PE-3201-01UN-LF power supply module fails, the external manifestations may be different, for example, the TOSHIBA 40LV833RB does not turn on at all and there is no indication of the indicator lights on the front panel. The diagnostics of the power supply should always be started by checking the fuse and, if it is broken, it is first necessary to check the rectifier bridge diodes and the power switch for the likelihood of an avalanche or thermal breakdown.
It should be borne in mind that in the repair practice it is extremely rare that key transistors of the N-FET type fail for no reason that should be looked for by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, either dried electrolytic capacitors or dangling resistors of the primary circuit of the PSU, involved in the stabilization process. In this case, all semiconductor elements of the strapping of the A6069H FSFR1800 PWM controller microcircuit are subject to verification, which it is desirable to verify by replacement.
It is somewhat more difficult to look for a malfunction in the converter of the power module with an active KKM (power factor corrector).
If the TOSHIBA 40LV833RB 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.
In most cases, the diagnosis and repair of the ETL-XPC-204T inverter is difficult due to the organization of protection, which turns it off in emergency cases to avoid fires during short circuits or breaks in high-voltage circuits and during depressurization of lamps. Often, repairmen block the protection circuits in order to make the necessary measurements at the inverter control points to identify the causes of the defect.
When disabling 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.
Diagnosis and repair of the motherboard WIF778 V1.02 P5 32AV833 Rev 1.03 is carried out by checking the performance of power stabilizers or updating the software (software). In some cases, to repair the MB board (SSB), it may be necessary to replace the chips - MSD3704PX-LF-SA with new or obviously good ones.
If you suspect a malfunction of the TDTK-G641D tuner, first of all, you need to make sure that the voltage of the varicaps (30-33V) is present on the corresponding output of the tuner, as well as other voltage supplying it.
Once again, remind users! Attempts to independently repair the TOSHIBA 40LV833RB TV without the appropriate qualifications and experience can lead to its complete non-repairability!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba Chassis 32AV833. Service manual and schematic diagram
The appearance of the MainBoard 32AV833 is shown in the figure below:32AV833
32AV833 can be used in TVs:
TOSHIBA 26EL833RB (Panel LC260EXN (SD)(A3) 75023140), TOSHIBA 26EL834RB (Panel LC260EXN SD A3), TOSHIBA 32AV833RB (Panel LC320WXN SCC1), TOSHIBA 32EL833G (Panel LC320EXN (SD)(A2)), TOSHIBA 32EL833R 32EL834R (Panel LC320EXN-SDA2 75023687 LCD PANEL), TOSHIBA 32HL833R (Panel LC320EUN SD V1 75022862 LED), TOSHIBA 32HL834R (Panel LC320EUN (SD)(V1)), TOSHIBA 32LV833RB (Panel T315HW04 V4), TOSHIBA 40LV833RB (Panel V400H1-L10), TOSHIBA 42DB833R (Panel LC420EUN (SD)(V1) 75023049), TOSHIBA 42HL833R (Panel LC420EUN (SD)(V1) LED 75023049), TOSHIBA 42HL834R (Panel LC420EUN (SD)(V1)).
Main features of the TOSHIBA 40LV833RB device:
Installed matrix (LCD panel) V400H1-L10.
The matrix control uses the Timing Controller (T-CON) MV-0E88441.
An ETL-XPC-204T inverter is used to power the backlight lamps; it is controlled by the AP11421SN PWM controller (28). As power elements of the inverter, keys of the AO D4184 type are used.
The necessary supply voltages for all nodes of the TOSHIBA 40LV833RB TV are generated by the PE-3201-01UN-LF power module or its analogs using A6069H, FSFR1800 microcircuits.
MainBoard - the main board (motherboard) is a 32AV833 module, using microchips MSD3704PX-LF-SA and others.
The TDTK-G641D tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: V400H1-L10
Type: a-Si TFT-LCD, Panel
Diagonal size: 40 inch
Resolution: 1920x1080, FHD
Display Mode: Super MVA, Normally Black, Transmissive
Active Area: 885.6x498.15 mm
Surface: Antiglare (Haze 11%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 6000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 7.5 (G to G)
Frequency: 60Hz
Lamp Type: 12 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
Brand: TOSHIBA, Model: 40LV833.
Short from TV: LCD, 40 ", 1920x1080, 1080p Full HD, sound: 14W, HDMI: 2.
The Toshiba official website has firmware (software update) for the 40LV833N (1.57), 40LV833G (1.05), 40LV833F (1.57) models.
The composition uses MainBoard 32AV833 Rev 1.03 WIF778 V1,02 P5 and LCD panel (matrix) V400H1-L10.
Power Supply Unit (PSU) PE-3201-01UN-LF Power Supply.
TOSHIBA 40LV833 LCD TV with V400H1-L10 LCD, 40 "(102 cm) diagonal, 16: 9 format. 450 cd / m² screen brightness is provided by CCFL (EEFL) fluorescent lamps. Maximum brightness to minimum ratio (contrast) ) is 6000: 1. Dynamic contrast ratio of 50,000: 1 is achieved by special control of the backlight. The design and technical capabilities of the TV provide for watching broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in the graphic resolution of the standard 1080p (Full HD). the video signal can be processed in analogue 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, MPEG4, Xvid, MKV , JPEG.
The power of the speaker system of sound 14 W (2x7 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, audio x2, component, SCART, RGB, VGA, HDMI x2, USB. 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 standards.
The power consumed by the TV in the operating mode from the network is 102 watts.
Overall dimensions: with stand 977x679x274 mm, without stand 977x630x82 mm.
TV Weight: with stand: 16.5 kg, without stand: 15.1 kg.
Attention! The TOSHIBA 40LV833 LCD TV panel V400H1-L10 is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!