Technical description and composition of the TOSHIBA 32RV733R TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 32RV733R
Panel: T315HW04 V4
T-CON: T315HW04 V0 CTRL
Inverter (backlight): VIT1884.00 REV2 LOGAN (75018019 !!)
PWM Inverter: OZ964SN (20) AS339M-G1 (14)
MOSFET Inverter: P4004ED (3) P2904BD (3)
Power Supply (PSU): DPS-145PP-131 A DELTA 75018013
PWM Power: A6069H (Standby 7pin), NCP1607 (PFC), SSC9502S (PWM 18pin)
MOSFET Power: K3569 K6A60D
MainBoard: PE0828 A 75017984
IC MainBoard: TMP91FW27UG, 24C08, TC90417XBG-R, K4T1G164QF, TC58D02A3TA00, BM5446, SiI9287, UPD720114
Tuner: ENG37F04KF
Control: CT-90344
Specifications 32RV733
TOSHIBA 32RV733R
General recommendations for repairing TV LCD
It is advisable to start the diagnosis of a malfunction of the TOSHIBA 32RV733R TV, like all others, with an external examination of possible changes, both external and internal elements. In some cases, visible external damage to the elements can suggest directions for troubleshooting and localizing the defect before starting the necessary measurements at the control points of the nodes of electronic circuits. Ring cracks in the soldering of the leads of the heating elements, swollen electrolytic capacitors, a charred paint layer on the resistors - all this for the repairman can be a hint in the assumptions about the causes and consequences of the malfunction.
If the TV does not turn on, no indicators on its front panel are lit or blinking. Also, if the TV does not respond to the remote control and buttons, it does not make any sounds or any signs of operability when it is turned on, there is a certain chance that the DPS-145PP-131 A DELTA 75018013 power supply module is defective and needs repair. Sometimes with similar manifestations a problem can only occur in the absence of processor power, but this happens much less often. It is advisable to start the troubleshooting of the power supply module by checking the mains fuse. If it is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and the power switch of the K3569 K6A60D converter, which are often found in breakdown conditions in such situations.
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 PWM controller microcircuit A6069H (7) 1607B (8) SSC9502S (18), which it is desirable to check by replacement, are subject to verification.
In cases using a power module with an active KKM, troubleshooting is sometimes somewhat more complicated.
If the TOSHIBA 32RV733R has no 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 VIT1884.00 REV2 LOGAN inverter (75018019 !!) 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 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.
It should be remembered that when the protection is turned off, there is always a risk of failure of the power elements of the inverter during diagnosis. After repair, it is necessary to restore all standard converter protection circuits.
In cases of attempts to repair the MAIN motherboard (PE0828A) 75017984, it is necessary to check the operability of the power supply circuits of the microcircuits and, if possible, update the software (software). When repairing an MB board, you need to check its components TMP91FW27UG, 24C08, TC90417XBG-R, K4T1G164QF, TC58D02A3TA00, BM5446, SiI9287, UPD720114. Defective items should be replaced.
If you suspect a malfunction of the ENG37F04KF 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.
Owners and users of the TOSHIBA 32RV733R TV must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 32RV733R - 37RV733R 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 is a Step-Up Converter based on the NCP1607 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 32RV733R device:
Installed matrix (LCD panel) T315HW04 V4.
The matrix control uses the Timing Controller (T-CON) T315HW04.
To power the backlight, an inverter VIT1884.00 is used, it is controlled by the PWM controller OZ964SN (20) AS339M-G1 (14). As power elements of the inverter, keys of the type P4004ED (3) P2904BD (3) are used.
The necessary supply voltages for all nodes of the TOSHIBA 32RV733R TV are generated by the DPS-145PP-131 power supply module or its analogs using A6069H (Standby 7pin), NCP1607 (PFC), SSC9502S (PWM 18pin) microcircuits and K3569 K6A60D type power switches.
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: 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: 32RV733.
Short from TV: LCD, 32 ", 1920x1080, 1080p Full HD, sound: 20W, HDMI: 4, Internet access.
The official Toshiba website has firmware (software update) for the models 32RV733G (10.1.59.6), 32RV733F (10.1.41.9), 32RV733B (10.1.59.5).
The composition uses MainBoard PE0828 A 75017984 and an LCD panel (matrix) T315HW04 V4.
Power Supply Unit (PSU) DPS-145PP-131 A 75018013 Power Supply.
TOSHIBA 32RV733 LCD TV with T315HW04 LCD, 32 "(81 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 viewing broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in the graphic resolution of the standard 1080p (Full HD). The source or video signal can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media 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.
Overall dimensions: with stand 786x584x292 mm, without stand 786x525x86 mm.
TV mass: 13.5 kg.
Attention! The T315HW04 V4 panel of the TOSHIBA 32RV733 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!