Technical description and composition of the TOSHIBA 32DV703R TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 32DV703R 32DV704R
Chassis / Version: GRU2 WISTRON
Panel: T315XW04 V.1 79105169 // 75016146 LCD PANEL, LTA320AP08
Inverter (backlight): 4H.V2258.211 // LJ97-02149A 75017600 LCD REPAIR PART, INVERTER,
Power Supply (PSU): FSP128-3F01A 75019694 // 75018688 POWER MODULE, OPENFRAME 132W / + 5, 12, 24V, 0433-002F000 // 75019694 PC BOARD ASSY, POWER, FSP128-3F01A PP G
PWM Power: SSC9502S (16), NCP1607 (PFC), STR-A6069H
MOSFET Power: FQPF5N50C, FQPF13N50C
MainBoard: GRU2 26 32 75019700 PC BOARD ASSY
IC MainBoard: 75019668 DVD-RW DRIVE UNIT, HH SLOT, DAV-RR953WR, RUSS, SOH-DL6 (SAMSUNG IM)
Tuner: TDTC-G429D
Control: Remote: SE-R0319, IR 09417-1 48.71x04.011
Specifications 32DV703
TOSHIBA 32DV703R
General recommendations for repairing TV LCD
It is advisable to start the diagnosis of a malfunction of the TOSHIBA 32DV703R, 32DV704R TV, like all others, with an external examination of possible changes, both external and internal elements. Any external damage can sometimes prompt the repairman to take further steps to determine the malfunction of the TV and localize the defect. In most cases, the repairman can guess the causes of the defect and possible consequences by the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of element leads, swollen rectifier filter capacitors, charred resistors and other circuit elements.
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, does not make any sounds or any signs of operability when turned on, there is a certain chance that the FSP128-3F01A 75019694 // 75018688 POWER MODULE, OPENFRAME 132W / + 5, 12, 24V power supply module is faulty , 0433-002F000 // 75019694 PC BOARD ASSY, POWER, FSP128-3F01A PP G and needs repair. Sometimes with similar manifestations a problem can only occur in the absence of processor power, but this happens much less often. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and, in the event of a break, the cause should be sought in the power semiconductor elements of the pulsed flyback converter of the main PSU. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch of the converter, which can be installed separately on the radiator, or integrated with a PWM controller.
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 SSC9502S (16) 16070PASC (8), which it is desirable to check by replacement, are subject to verification.
Diagnostics of power modules with a Power Factor Corrector (CMC) is somewhat more complicated and requires a more detailed approach.
If the TOSHIBA 32DV703R, 32DV704R does not have an image, there is sound and the channels are switched, there is a possibility of a malfunction of the display backlight, or their power converter - inverter. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the inverter itself, including in the secondary rectifier of the main PSU.
When repairing the inverter 4H.V2258.211 // LJ97-02149A 75017600 LCD REPAIR PART, INVERTER, it is often necessary to disable the protection for diagnostics, which, for the purpose of fire safety, turns it off in any emergency situation, for example, in case of malfunction or uneven wear of the lamps, which is essential makes it difficult to find a defect.
It should be remembered that in such cases there is a risk of failure of the power elements of the inverter and to take special care. After carrying out repairs, the protection circuit must be restored for further safe operation of the TV.
If the motherboard 75019700 PC BOARD ASSY, MAIN, GRU2 26 32 is faulty, first of all it is necessary to check all the linear power regulators of its chips and, if necessary, update the software. Sometimes you can check the health of MB only by replacement. If it is not possible to replace the MB board (SSB), you need to check the health of its elements - 75019668 DVD-RW DRIVE UNIT, HH SLOT, DAV-RR953WR, RUSS, SOH-DL6 (SAMSUNG IM). Defective components should be replaced.
Attention to users! Independent repair of the TOSHIBA 32DV703R, 32DV704R TV without the appropriate qualifications and experience can lead to its complete non-repairability!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 15DV703R, Toshiba 19DV703R, Toshiba 19DV704R, Toshiba 22DV703R, Toshiba 22DV704R, Toshiba 26DV703R, Toshiba 32DV703R
Service Manuals with Schematic Diagrams 93 pages of 2010 on models 15DV703R, 19DV703R, 19DV704R, 22DV703R, 22DV704R, 26DV703R, 32DV703R
The appearance of MainBoard GRU2 is shown in the figure below:GRU2
GRU2 can be used in TVs:
TOSHIBA 15DV703R 15DV704R (Panel M156B1-L02 RevC1 79104859), TOSHIBA 15SLDT3R (Panel M156B1-L02 Rev.C1), TOSHIBA 19DV703R (Panel M185XW01 V2), TOSHIBA 22DV703R (Panel V216B1-L04 Rev C1 (L02 Rev C1)), TOSHIBA 22DV704R (Panel V216B1-L04 79105088), TOSHIBA 32DV703R 32DV704R (Panel T315XW04 V.1 79105169 ).
PSU Advanced
The FSP128-3F01A 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 1607 PWM controller that evenly distributes high-frequency impulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage evenly 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.
Key Features of the TOSHIBA 32DV703R:
Installed matrix (LCD panel) T315XW04 V.1 79105169 or 75016146 LCD PANEL, LTA320AP08.
To power the backlight, an inverter 4H.V2258.211 is used.
The necessary supply voltages for all nodes of the TOSHIBA 32DV703R TV are generated by the FSP128-3F01A power supply module or its analogs using SSC9502S (16), NCP1607 (PFC), STR-A6069H microchips and power switches of the type FQPF5N50C, FQPF13N50C.
MainBoard - the main board (motherboard) is a GRU2 module, using chips 75019668 DVD-RW DRIVE UNIT, HH SLOT, DAV-RR953WR, RUSS, SOH-DL6 (SAMSUNG IM) and others.
The TDTC-G429D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T315XW04 V1
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: MVA, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare (Haze 11%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
Trademark: TOSHIBA, Model: 32DV703.
Briefly from the TV: LCD, built-in DVD player, 32 ", 1366x768, 720p HD, sound: 20W, HDMI: 2.
The composition uses MainBoard GRU2 26/32 75019700 and an LCD panel (matrix) T315XW04 V.1, or LTA320AP08.
Power Supply Unit (PSU) FSP128-3F01A (75019694) 132W, 12, 24V Power Supply.
TOSHIBA 32DV703 LCD TV with T315XW04 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 3000: 1 Dynamic contrast ratio of 30000: 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 analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i. Supported media file formats: MP3, WMA, MPEG4, VideoCD, SVCD, 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 x2, component, 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, 1360x768.
The power consumed by the TV in the operating mode from the network is 109 watts.
Overall dimensions: 805x590x255 mm.
The mass of the TV: 11.8 kg.
Attention! The T315XW04 V.1 panel of the TOSHIBA 32DV703 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!