Technical description and composition of the TOSHIBA 15V300PR TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 15V300PR
Chassis / Version: 17MB21-1 Vestel
Panel: SVA150XG10TB // HT150X02-100
Inverter (backlight): 17IPS01-2
PWM Inverter: FAN7314 (20n) pl
MOSFET Inverter: FDS8962C
Power Supply (PSU): 17IPS01-2
PWM Power: STR-W6253
MOSFET Power: B H51 Y0504SA, ADJ-B 0746
MainBoard: 17MB21-1
IC MainBoard: VCT49X3G 24C64 TSU36AWL-M-LF
Tuner: UV1316 / A I H-4
Control: CT-865
Specifications 15V300PR
TOSHIBA 15V300PR
General recommendations for repairing TV LCD
TOSHIBA 15V300PR TV, like any other, it is advisable to start repairing it by inspecting the internal and external visible physical visual changes. Sometimes, only by some signs can we determine the further direction of the localization of the malfunction. 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 power supply module 17IPS01-2 is faulty, the external manifestations may be different, for example, the TOSHIBA 15V300PR does not turn on at all and there is no indication of the indicator lights on the front panel. 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 B H51 Y0504SA, ADJ-B 0746 converter, which can be installed separately on the radiator or integrated with a PWM controller.
Power switches in flyback converters fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The cause may be a malfunction of the STRW6253 PWM controller chip, which can only be checked by replacing it with a new or obviously working one.
It is somewhat more difficult to look for a malfunction in the converter of the power module with an active KKM (power factor corrector).
In cases where the TOSHIBA 15V300PR TV has lost an image, and the sound is there and all the other functions are functional, there is a possibility of a malfunction of the inverter (converter for powering the backlight). When you turn on the TV, the image may appear briefly and immediately disappear. It must be borne in mind that with such manifestations, the lamps themselves also fail, the malfunction of which can be detected by replacement, by connecting to the connectors for diagnostics that are known to be serviceable and suitable in power.
The operation of the power circuits of the inverter and the backlight in the normal mode are controlled by special protection, which is organized for fire safety, for example, to disconnect during short circuits or breaks in high-voltage connections or when the lamps are depressurized. This protection makes it difficult to diagnose and repair the inverter.
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 some cases, to repair the MB board (SSB), it may be necessary to replace the chips - VCT49X3G 24C64 TSU36AWL-M-LF with new or obviously good ones.
In cases where there is no tuning to the local television channels, you should make sure that the voltage of the varicaps (30-33V) and other supply voltages on the terminals of the tuner UV1316 / A I H-4 are present.
It should be remembered! Attempts to repair the TOSHIBA 15V300PR TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
SCHEMATIC MANUAL ----------------> Vestel MB21, Toshiba 15V300PR
Service Manuals with Schematic Diagrams 60 pages 2005 on Model 15V300PR.
The appearance of the MainBoard 17MB21-1 is shown in the figure below:17MB21-1
Main features of the TOSHIBA 15V300PR device:
Installed matrix (LCD panel) SVA150XG10TB or HT150X02-100.
To power the backlight, an inverter 17IPS01-2 is used, it is controlled by a PWM controller FAN7314 (20n) pl. As power elements of the inverter, keys of the FDS8962C type are used.
The necessary supply voltages for all nodes of the TOSHIBA 15V300PR TV are generated by the 17IPS01-2 power module or its analogs using STR-W6253 microcircuits and type B power switches H51 Y0504SA, ADJ-B 0746.
MainBoard - the main board (motherboard) is a 17MB21-1 module, using VCT49X3G 24C64 TSU36AWL-M-LF chips and others.
The UV1316 / A I H-4 tuner allows you to receive television programs and tune to channels.
Additional technical information about the panel:
Brand: SVA-NEC
Model: SVA150XG10TB
Type: a-Si TFT-LCD, Panel
Diagonal size: 15.0 inch
Resolution: 1024x768, XGA
Display Mode: TN, Normally White, Transmissive
Active Area: 304.128x228.096 mm
Brightness: 250 cd / m²
Contrast Ratio: 600: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 60%
Response Time: 2/6 (Tr / Td)
Frequency: 60Hz
Lamp Type: 2 pcs CCFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 20 pins
Voltage: 3.3V
TOSHIBA 15V300PR LCD TV with SVA150XG10TB LCD, 15 "diagonal size, 4: 3 format. 250 cd / m² screen brightness is provided by CCFL (EEFL) fluorescent lamps. The ratio of maximum brightness to minimum (contrast) is 450: 1. The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation takes place in the standards 480i, 480p, 576i, 576p.
The power of the sound system 4 W (2x2 W) provide two speakers. The audio processing system NICAM STEREO is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, S-Video, SCART, RGB, VGA. 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.
The power consumed by the TV in the operating mode from the network is 45 watts.
Overall dimensions: with stand 373x358x145 mm, without stand 373x329x75 mm.
TV Weight: with stand: 4.5 kg, without stand: 3.3 kg.
Attention! The SVA150XG10TB panel of the TOSHIBA 15V300PR 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!
