Technical description and composition of the TOSHIBA 32HV10G TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 32HV10G
Chassis / Version: PE1032
Panel: LTA320AP05
Inverter (backlight): integrated into PSU
PWM Inverter: BD9893F
Power Supply (PSU): PSIV161C01V V71A00023700 (T32LIPS_LC REV 1.0)
PWM Power: ICE2QR0665Z, SEM3040 (PFC)
MainBoard: PE1032 V28A001347B1
IC MainBoard: CPU RTD2668, Flash W25P80, IC 104
Tuner: DTOS40CVL051B
Specifications 32HV10
TOSHIBA 32HV10G
General recommendations for repairing TV LCD
Repair of the TOSHIBA TV with the PE1032 chassis should begin with a careful external inspection of all its components and modules. Often, based on certain external signs, it may be possible to draw certain conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are made, which will determine the further algorithm for troubleshooting and localizing 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.
In the absence of any signs of operability, when the TOSHIBA 32HV10G does not turn on and does not signal anything with the control lights on the panel, there is a possibility of a malfunction of the TV power module. With the same manifestations, the power regulator of the control processor on the motherboard may be faulty. First of all, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is cut off in the power supply, in most cases a breakdown of the power key (s) is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
It should be remembered that in the practice of repair, usually the power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the PWM controller chip itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
If there is no image when you turn on the TOSHIBA 32HV10G, or it appears for a second and disappears completely, but there is sound, most likely either the backlight lamps or their power converter (inverter) are faulty. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the general power supply unit. It is necessary to take into account that in cases of inverter protection shutdown (in order to be able to diagnose) there is a risk of failure of the inverter power elements and take special care. After carrying out repairs, the protection circuit must be restored for further safe operation of the TV.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software). When repairing an MB board, it is necessary to check its components CPU RTD2668, Flash W25P80, IC 104. Faulty elements should be replaced. If BGA chips are installed, their malfunction is usually localized by heating. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
Attention to the owners! Attempts to repair the TOSHIBA 32HV10G TV independently are not recommended by the manufacturer and may lead to serious negative consequences!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> PSIV161C01V power supply
FIRMWARE FOR SPI FLASH -----------> TOSHIBA 32HV10G, Main: PE1032, Panel: LTA320AP05
The appearance of MainBoard PE1032 is shown in the figure below:PE1032
PSU Advanced
According to the conditions of compliance with modern world standards for household switching power supplies, the PSIV161C01V module provides for the use of a Power Factor Correction unit. The PFC circuit is a flyback converter based on the SEM3040 PWM controller. The reactance of an electrolytic capacitor of a line filter at a frequency of 50-60 Hz is usually not more than 20-30 ohms and its charge directly from the network through open diodes could reach tens of amperes per pulse if no filtering were applied.
As a result of the PFC conversion, an increased voltage on the capacitor (about 380V) cannot directly open the rectifier diodes, on the anode of which the voltage will always be slightly less (about 300V) and then its charging current will always be limited by the elements of the PWM controller. As a result, the envelope of the high-frequency pulses of the consumed current will repeat the shape and phase of the input sinusoidal voltage. The presence of an increased voltage (+ 380V) on the network capacitor indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the TOSHIBA 32HV10G device:
Installed matrix (LCD-panel) LTA320AP05.
To power the backlight, a converter is used, combined with a power supply, controlled by the BD9893F PWM controller.
The necessary supply voltages for all nodes of the TOSHIBA 32HV10G TV are generated by the PSIV161C01V power module, or its analogs using ICE2QR0665Z, SEM3040 (PFC) microcircuits.
MainBoard - the main board (motherboard) is a PE1032 module, using CPU chips RTD2668, Flash W25P80, IC 104 and others.
The DTOS40CVL051B tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA320AP05-107
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: PVA, Normally Black, Transmissive
Active Area: 697.68x392.25 mm
Surface: Antiglare (Haze 7%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 4000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 20 (G to G)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
Brand: TOSHIBA, Model: 32HV10.
Short from TV: LCD, 32 ", 1366x768, 720p HD, sound: 10 watts.
The composition uses MainBoard PE1032 V28A001347B1 and an LCD panel (matrix) LTA320AP05.
Power Supply Unit (PSU) PSIV161C01V V71A00023700, T32LIPS_LC REV 1.0 Power Supply.
TOSHIBA 32HV10 LCD TV with LTA320AP05 32 ”(81 cm) LCD display in 16: 9 format. 420 cd / m² screen brightness is provided by CCFL (EEFL) fluorescent lights. Dynamic contrast ratio of 50,000: 1 is achieved by special operation control It is possible to 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 standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p.
The power of the sound system 10 W (2x5 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 x2, audio x2, component, HDMI. 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.
The power consumed by the TV in the operating mode from the network is 85 watts.
Overall dimensions: with stand 784x518x160 mm, without stand 784x510x76 mm.
TV Weight: with stand: 8 kg, without stand: 7.7 kg.
Attention! The TOSHIBA 32HV10 LCD TV panel LTA320AP05 is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!