Technical description and composition of the TOSHIBA 32LV833RB TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 32LV833RB
Chassis / Version: 32AV833 rev1.03
Panel: T315HW04 V4
T-CON: T315HW04 V0 CTRL BD AUO-12401 N02M 1975
Inverter (backlight): VIT71884.00 Rev: 2 LOGAN
PWM Inverter: OZ964SN (20), AS324W-G1 (14), AS339W-G1 (14) 78M05
MOSFET Inverter: P4004ED (3) P-can, P2904BD (3) N-can
Trans Inverter: T51-8223-210, T51-8224-210
Power Supply (PSU): DPS-135JP A bowl DDA010 // 1402CP2W, PE-3131-02UN-LF Rev: B
PWM Power: FSFR1800 (9), A6069H (Standby), DDA010, DDA014 (SSC9502 18pin), NCP1608 (PFC)
MOSFET Power: K6A60DR
MainBoard: 32AV833 Rev: 1.03
IC MainBoard: MSD3704PX-LF-UM, TAS5707L
Tuner: TDTK-G641D
Control: Remote: CT-90326, IR: 32AV833-IRLED
Specifications 32LV833
TOSHIBA 32LV833RB
General recommendations for repairing TV LCD
Repair of the TOSHIBA 32LV833RB TV is better to begin with a thorough external inspection and diagnosis of the malfunction. It is advisable to carefully examine the internal and external components. Often, according to certain external signs, the repairman can draw some conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are made, which will determine the further algorithm for troubleshooting and localizing the defect. Swollen electrolytic or cermet capacitors, charred resistors, ring cracks in the soldered terminals of the elements - all this can significantly help the master to determine the causes and consequences of the malfunction of the TV.
In the case when the 32LV833RB 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, most likely in this case the power supply module DPS-135JP-A dezh DDA010 // 1402CP2W, PE-3131- is faulty 02UN-LF Rev: B. The diagnostics of the power supply should always be started by checking the fuse and, if it is broken, the first thing to do is to check the rectifier bridge diodes and the K6A60DR power switch for the possibility of an avalanche or thermal breakdown.
As a rule, flyback converter keys, which use an N-Fet field effect transistor on a separate radiator, or integrated with a FSFR1800 (9) PWM controller, A6069H (7) DDA010 (8), DDA014 (SSC9502?) (18), NCP1608 (8) into a single chip, reliable enough and rarely fail for no reason. The reasons for the breakdown of the key should be sought 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.
Diagnostics of power modules with a Power Factor Corrector (CMC) is somewhat more complicated and requires a more detailed approach.
If the TOSHIBA 32LV833RB 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.
In most cases, the diagnosis and repair of the VIT71884.00 Rev: 2 LOGAN inverter is difficult due to the organization of protection, which turns it off in emergency cases to avoid fires during short circuits or open circuits in high voltage circuits and during lamp depressurization. Often, repairmen block the protection circuits in order to make the necessary measurements at the control points of the inverter to identify the causes of the defect.
When diagnosing with the protection off, special precautions must be taken, because there is a risk of failure of the power elements of the inverter. After the diagnosis, it is imperative to restore the protection circuits for the inverter to operate normally.
Repair of the 32AV833 Rev: 1.03 motherboard should begin with the diagnosis and verification of all linear stabilizers or power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM. In some cases, it is necessary to check or replace (if necessary) the elements of the MB board (SSB) - MSD3704PX-LF-UM, TAS5707L.
If the TV works normally from external devices, but does not tune into television channels, the TDTK-G641D tuner may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals, as well as the power supply of varicaps (30-33V).
Attention to the owners! Attempts to independently repair the TOSHIBA 32LV833RB TV are not recommended by the manufacturer and can lead to serious negative consequences!
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)).
PSU Advanced
The DPS-135JP power module is designed using a Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced into the power supply by the device. The PFC is a Step-Up Converter based on the NCP1608 PWM controller, which evenly distributes high-frequency pulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage over a period of 50 Hz. The current of its charge in this case will already be determined not by its reactance (usually 10-30 ohms for the network frequency), but by the elements of the converter. As a result, a change in the amplitude of the pulses (envelope) of the consumed current of the converter will repeat the shape and phase of the input sinusoidal voltage. The availability of an increased voltage (about + 380V) in the operating mode on the capacitor of the line filter indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the TOSHIBA 32LV833RB device:
Installed matrix (LCD panel) T315HW04 V4.
The matrix control uses the Timing Controller (T-CON) T315HW04.
To power the backlight, an inverter VIT71884.00 is used, it is controlled by the PWM controller OZ964SN (20), AS324W-G1 (14), AS339W-G1 (14) 78M05. The transformer T51-8223-210, T51-8224-210 is installed in the inverter converter. As power elements of the inverter, keys of the type P4004ED (3) P-can, P2904BD (3) N-can are used.
The necessary supply voltages for all nodes of the TOSHIBA 32LV833RB TV are generated by the DPS-135JP power supply module or its analogs using the FSFR1800 (9), A6069H (Standby), DDA010, DDA014 (SSC9502 18pin), NCP1608 (PFC) microchips and power switches of the K6ADR type .
MainBoard - the main board (motherboard) is a 32AV833 module, using microchips MSD3704PX-LF-UM, TAS5707L and others.
The TDTK-G641D tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T315HW04 V4
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA3, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Antiglare (Haze 11%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
Brand: TOSHIBA, Model: 32LV833.
Short from TV: LCD, 32 ", 1920x1080, 1080p Full HD, sound: 10W, HDMI connectors: 2.
The Toshiba official website has firmware (software update) for the models 32LV833N (1.57), 32LV833G (1.05), 32LV833F (1.57).
The composition uses MainBoard 32AV833 Rev: 1.03 and an LCD panel (matrix) T315HW04 V4.
Power supply unit (PSU) DPS-135JP A, or PE-3131-02UN-LF Rev: B Power Supply.
TOSHIBA 32LV833 LCD TV with T315HW04 LCD, 32 "(81 cm) diagonal size 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 5000: 1. Dynamic contrast ratio of 50,000: 1 is achieved by special control of the backlight operation.The design and technical capabilities of the TV provide for viewing broadcasts and films in high quality HD at a resolution of 1920x1080 pixels in a graphic decomposition according to the standard 1080p (Full HD). The video or 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 sound system 10 W (2x5 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 69 watts.
Overall dimensions: with stand 786x558x233 mm, without stand 786x510x86 mm.
TV Weight: with stand: 10 kg, without stand: 8.9 kg.
Attention! The T315HW04 V4 panel of the TOSHIBA 32LV833 LCD TV is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!