Technical description and composition of the TOSHIBA 22DV703R TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 22DV703R
Chassis / Version: GRU2 WISTRON
Panel: V216B1-L04 Rev C1 (L02 Rev C1)
Inverter (backlight): integrated into PSU
PWM Inverter: OZ9938GN (16)
MOSFET Inverter: 4511GN (5)
Trans Inverter: TMS94481CT, TMS92903CT, TMS94819CT
Power Supply (PSU): DPS-65TP-3 E116921 // E131175 75018788 POWER MODULE
PWM Power: 6742MR (8)
MOSFET Power: K4101
MainBoard: GRU2 15 19 22, 75019667, GRU2 15 ~ 32 MB 09182-2 48.71Y01.021
IC MainBoard: TDA7491P, Z1046AI, APW7120
Tuner: TDTC-G429D
Control: SE-R0319
Technical Specifications 22DV703
TOSHIBA 22DV703R
General recommendations for repairing TV LCD
It is advisable to start any repair and diagnostics of the TOSHIBA 22DV703R TV with a careful external examination of the internal and external elements, including case parts, display, buttons and cables. 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.
In the absence of any signs of operability, when the TOSHIBA 22DV703R does not turn on and does not signal anything with the control lights on the panel, the power supply module DPS-65TP-3 E116921 // E131175 75018788 POWER MODULE is most likely to be faulty. When diagnosing and repairing the DPS-65TP-3 power supply unit E116921 // E131175 75018788 POWER MODULE, the fuse must first be checked, and if it is broken, the power switch K4101 and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
The reasons for the breakdown of the power switch of the flyback converter of the power module can be different, for example, a malfunction of semiconductor cells or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the PWM controller chip 6742MR (8) or breakage of the resistors in its bundle.
When using a power factor correction unit (PFC) in the power modules, troubleshooting becomes somewhat more complicated and requires additional experience and knowledge of their operation.
If the TOSHIBA 22DV703R 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.
Repair of the inverter DPS-65TP-3 75019625 // 75018788 POWER MODULE, OPEN FRAME 60W / + 5 12V, 0433-002E000 can often be somewhat complicated by the use of special protection circuits that are designed to disconnect it in emergency cases for fire safety during depressurization of lamps, short circuits or open circuits in high voltage circuits and connections. Sometimes it becomes necessary for diagnostic purposes to block the protection circuits in order to be able to make the necessary measurements at the control points of the circuit.
All necessary precautions must be observed when disabling the inverter protection during diagnostics and not leaving it disconnected after the repair is completed.
Diagnostics and repair of the motherboard GRU2 15 19 22, 75019667, GRU2 15 ~ 32 MB 09182-2 48.71Y01.021 is carried out by checking the performance of power stabilizers or updating the software (software). When repairing an MB board, you need to check its components TDA7491P, Z1046AI, APW7120. Defective items should be replaced.
Remember! Attempts by the users of the TOSHIBA 22DV703R TV to be independently repaired without the appropriate qualifications and necessary experience can lead to serious negative consequences!
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 ).
The appearance of the power supply
Main features of the TOSHIBA 22DV703R device:
Installed matrix (LCD panel) V216B1-L04 Rev C1 (L02 Rev C1).
To power the backlight, a converter is used, combined with a power supply unit, controlled by the OZ9938GN PWM controller (16). The transformer TMS94481CT, TMS92903CT, TMS94819CT is installed in the inverter converter. As power elements of the inverter, keys of the type 4511GN (5) are used.
The necessary supply voltages for all nodes of the TOSHIBA 22DV703R TV are generated by the DPS-65TP-3 power supply module or its analogs using 6742MR microcircuits (8) and K4101 type power switches.
MainBoard - the main board (motherboard) is a GRU2 module, using TDA7491P, Z1046AI, APW7120 and others.
The TDTC-G429D tuner provides TV reception and channel tuning.
Information from an alternative source:
TOSHIBA 22DV703R
Panel Type (Matrix): V216B1-L04 Rev. C1
Motherboard: 09182-2 GRU2 48.71Y01.021, RTD2674U, EM6AA160TSA-4G, 25L3205D, TDA7491P, AOZ1046AI x2, APW7120, Tuner: TDTC-G429D
T-con: V216B1-XC03 (not removable), CM1721C, HX8904TB
PSU & Invertor: DPS-65TP-3, SG6742MR, 2SK4101, OZ9938GN, AP4511GH x2, DVD: DAV-RR953WR
Remote control: SE-R0319
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: V216B1-L04
Type: a-Si TFT-LCD, Panel
Diagonal size: 21.6 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 477.417x268.416 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 400 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 1.3 / 3.7 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
TOSHIBA 22DV703 LCD TV with V216B1-L04 LCD, 22 "(55 cm) diagonal size in 16: 9 format. 400 cd / m² screen brightness is provided by CCFL (EEFL) fluorescent lamps. Maximum brightness to minimum ratio (contrast) ) is 1000: 1. Dynamic contrast ratio of 5000: 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 for 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 acoustic system of sound 6 W (2x3 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, 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 55 watts.
Overall dimensions: 554x405x215 mm.
TV Weight: 5.8 kg.
Attention! The V216B1-L04 Rev C1 panel of the TOSHIBA 22DV703 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!