Technical description and composition of the TOSHIBA 32AV500PR TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 32AV500PR
Panel: LC320WXN (SB) (B1) // AX080A034B
T-CON: MDK336V-0 19100110.
Inverter (backlight): MPF3933L N8601 // 75012524 MPF3002 // 75012525
PWM Inverter: BD9766FV 2A077 5501
MOSFET Inverter: 2SK3569
Power Supply (PSU): PE0513A TPS65516
MOSFET Power: K3654 2SK4107
Mainboard: PE0484
IC MainBoard: TDA8891 TDA15451 LPC924F TL2417
Tuner: TAEA-G081D
Control: Remote: CT-90298, IR: PE0486A V28A000642C1
Specifications 32AV500PR
TOSHIBA 32AV500PR
General recommendations for repairing TV LCD
It is advisable to start the diagnosis of a malfunction of the TOSHIBA 32AV500PR TV, like all others, with an external examination of possible changes, both external and internal elements. It often happens that some damage to elements or connections will help determine the correct direction in troubleshooting and localizing a 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.
Sometimes the TOSHIBA 32AV500PR TV simply does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is the failure of the common PE0513A TPS65516 power supply module. When diagnosing and repairing the power supply, first of all, it is necessary to check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module - rectifier diodes or power switch K3654 2SK4107.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors of the N-FET type fail for no reason that should be sought 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 chip are subject to verification, which it is desirable to verify by replacement.
Diagnostics of power modules with a Power Factor Corrector (CMC) is somewhat more complicated and requires a more detailed approach.
If there is no image when you turn on the TOSHIBA 32AV500PR, 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.
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.
All necessary precautions must be observed when disabling the inverter protection during diagnostics and not leaving it disconnected after the repair is completed.
On the PE0484 motherboard, in the event of a malfunction, you should first check the performance of all the power stabilizers of the microcircuits and, if necessary, update the software (software). In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - TDA8891 TDA15451 LPC924F TL2417 which may require replacement with new ones.
The malfunction of the V86A00004900 TEA-G081D tuner is established after checking the software and all the supply voltages at its terminals, including the varicap supply voltage (30-33V).
Attention to the owners! Attempts to repair the TOSHIBA 32AV500PR TV independently are not recommended by the manufacturer and can lead to serious negative consequences!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 32AV500PR. PE0484 PE0486 PE0531 PE0640
The appearance of MainBoard PE0484 is shown in the figure below:PE0484
PE0484 can be used in TVs:
TOSHIBA 32AV500PR (Panel LC320WXN (SB)(B1)), TOSHIBA 32AV500PSR (Panel LC320WXN (SB)(B1)), TOSHIBA 32AV501PR (Panel LK315T3LA31), TOSHIBA 32AV502PR (Panel LK315T3LA31 (75012574)), TOSHIBA 37AV502PR (Panel LC370WXN(SA)(C2) 75012583), TOSHIBA 42AV500PSR (Panel LC420WXN (SA)(B1)), TOSHIBA 42AV501PR (Panel LC420WX7-SLC1), TOSHIBA 42AV502PR (Panel LC420WXN-SAB1), TOSHIBA 37AV500PR (Panel AX094B002B).
The appearance of the power supply
Main features of the TOSHIBA 32AV500PR device:
Installed matrix (LCD panel) LC320WXN (SB) (B1) or AX080A034B.
The matrix control uses the Timing Controller (T-CON) MDK336V-0.
An MPF3933L inverter is used to power the backlight, it is controlled by a BD9766FV 2A077 5501 PWM controller. Keys of the 2SK3569 type are used as power elements of the inverter.
The necessary supply voltages for all nodes of the TOSHIBA 32AV500PR TV are generated by the PE0513A power module, or its analogs using power switches of the K3654 2SK4107 type.
MainBoard - the main board (motherboard) is a PE0484 module, using TDA8891 TDA15451 LPC924F TL2417 chips and others.
The TAEA-G081D tuner provides TV reception and channel tuning.
Information from an alternative source:
TOSHIBA 32AV500PR
Panel Type (Matrix): LC320WXN, MAIN (SSB): PE0484, Tuner: TAEA-G081D
T-con: LC320WXN-SBA1 6870C-0238A,
Inverter: KLS-EE32PIH12, Netzteil Board: PE0640A-1, SMPS: PE0531 Circuit,
TOSHIBA 32AV500PR LCD TV with LC320WXN LCD, 32 "(81 cm) diagonal size in 16: 9 format. The ratio of maximum brightness to minimum (contrast) is 800: 1. Dynamic contrast ratio of 20,000: 1 is achieved by special control of the backlight. Possible viewing 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 takes place in standard The channels are 480i, 480p, 576i, 576p, 720p, 1080i.
The power of the acoustic system of sound 20 W (2x10 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 x3, S-Video, component, SCART x2, HDMI x2. 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.
The power consumed by the TV in the operating mode from the network is 137 watts.
Overall dimensions: with stand 796x552x240 mm, without stand 796x512x99 mm.
TV Weight: with stand: 12.9 kg, without stand: 12.1 kg.
Attention! The TOSHIBA 32AV500PR LCD TV panel LC320WXN (SB) (B1) is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!