Technical description and composition of the TOSHIBA 40RV733R TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 40RV733R
Panel: LTA400HM02
Power Supply (PSU): DPS-145PP-131
PWM Power: A6069H (Standby), 1607B (PFC), SSC9502S (PWM 18pin)
MOSFET Power: K3569, K6A60D
MainBoard: PE0828 A
IC MainBoard: TMP91FW27UG, 24C08, TC90417XBG-R, K4T1G164QF, TC58D02A3TA00, BM5446, SiI9287, UPD720114
Tuner: ENG37F04KF
Specifications 40RV733
TOSHIBA 40RV733R
General recommendations for repairing TV LCD
Like any other TV, TOSHIBA 40RV733R repair it is advisable to start with an external inspection of the visible changes in the external and internal elements. Often, by the external signs and nature of some damage, it is possible to draw preliminary conclusions and determine a further algorithm for troubleshooting. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
If the TOSHIBA 40RV733R does not turn on, no control lights on the front panel light up and do not blink, therefore, there is a very high probability of a malfunction of the DPS-145PP-131 power module. When diagnosing and repairing the DPS-145PP-131 power supply unit, it is first necessary to check the fuse, and if it breaks, the power switch and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
As a rule, the keys of flyback converters, which use the N-Fet field effect transistor on a separate radiator, or integrated with the A6069 PWM controller in a single chip, are 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.
If the power module uses an active KKM circuit (power factor control), troubleshooting is somewhat more complicated.
If, when you turn on the TV, the image appears and immediately disappears, or is initially absent when you turn on, but there is sound and other functions work, there is a high probability of a malfunction of the inverter (power converter for the backlight). In such cases, the lamps, the inverter and the common power module are subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the inverter should be checked.
In most cases, the diagnosis and repair of the inverter is difficult due to the organization of protection, which turns it off in emergency cases in order 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.
In such cases, special care should be taken during diagnostics, 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.
Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - PE0828A and replace failed chips with new ones.
Before changing the ENG37F04KF tuner, if there is no possibility of tuning to television channels, make sure that there are supply voltages, including varicap power (30-33V), which must be measured on the corresponding tuner pins.
We recommend the owners of the 40RV733R TV for repair only to qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 40RV733R Service manual and schematic diagram
Service Manuals with Schematic Diagrams 172 pages 2009 on models 32RV733, 37RV733, 40RV733.
The appearance of MainBoard PE0828 is shown in the figure below:PE0828
PE0828 can be used in TVs:
TOSHIBA 32RV733R (Panel T315HW04 V4), TOSHIBA 37RV733R (Panel 37 inch), TOSHIBA 40RV733R (Panel LTA400HM02).
PSU Advanced
The DPS-145PP-131 power supply module is made using the Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced into the power supply by the device. The PFC assembly is a Step-Up Converter based on a 1607B PWM controller that 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
Key Features of the TOSHIBA 40RV733R:
Installed matrix (LCD panel) LTA400HM02.
The necessary supply voltages for all nodes of the TOSHIBA 40RV733R TV are generated by the DPS-145PP-131 power supply module or its analogs using A6069H (Standby), 1607B (PFC), SSC9502S (PWM 18pin) microcircuits and power switches of the K3569, K6A60D type.
MainBoard - the main board (motherboard) is a PE0828 module, using TMP91FW27UG, 24C08, TC90417XBG-R, K4T1G164QF, TC58D02A3TA00, BM5446, SiI9287, UPD720114 and others.
The ENG37F04KF tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA400HM02
Type: a-Si TFT-LCD, Panel
Diagonal size: 40 inch
Resolution: 1920x1080, FHD
Display Mode: S-PVA, Normally Black, Transmissive
Active Area: 885.6x498.15 mm
Surface: Antiglare (Haze 4.5%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 4500: 1
Display Colors: 1.07B (8-bit + Hi-FRC), CIE1931 72%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 12 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 10-bit), 51 pins
Voltage: 12.0V
TOSHIBA 40RV733 LCD TV with LTA400HM02 LCD display, 40 "(102 cm) diagonal size in 16: 9 format. 450 cd / m² screen brightness is provided 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. 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). -frequency or video signal can be processed by analog systems, PAL, SECAM, NTSC Image processing and generation of the digital signal occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p Supported multimedia file formats:.. JPEG.
The power of the sound system 20 W (2x10 W) provides 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 x3, component, SCART x2, RGB, VGA, HDMI x4, USB x2, Ethernet (RJ-45). 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 114 watts.
Overall dimensions: with stand 976x682x329 mm, without stand 976x623x93 mm.
TV Weight: with stand: 18.5 kg, without stand: 15.3 kg.
Attention! The TOSHIBA 40RV733 LCD TV panel LTA400HM02 is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!