Technical description and composition of the TOSHIBA 22AV605PR TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 22AV605PR
Chassis / Version: 715G3386-2
Panel: LC220WXE-TBA1 75014387
Power Supply (PSU): 715G3377-2
MainBoard: 715G3386-2
IC MainBoard: CPU: MST9A885GL-LF; EEPROM: 24C32;
Tuner: TAFT-S710D
Technical Specifications 22AV605P
TOSHIBA 22AV605PR
General recommendations for repairing TV LCD
Any repair of electronic equipment begins with an external inspection of the device and diagnosis of the malfunction. In this case, you should visually carefully examine all the elements of the TOSHIBA 22AV605PR TV, both internal and external. It often happens that some damage to elements or connections will help determine the correct direction of troubleshooting and localization of the defect. Experienced repairmen are often aware of the causes of the defect and the possible consequences, for example, from ring cracks in the soldering of the leads of the elements, as well as from swollen capacitors or resistors burnt to coal dust and other external indirect signs.
If the TOSHIBA 22AV605PR does not turn on, no control lights on the front panel light up or blink, therefore, there is a very high probability of a power module malfunction. 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.
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 PWM controller chip, which can only be checked by replacing it with a new or obviously working one.
If an active Power Factor Corrector (PFC) is used in the power module circuitry, it is sometimes more difficult to troubleshoot. Knowledge, experience, intuition and skills in such cases have a great advantage for a successful repair.
Sometimes the TOSHIBA 22AV605PR TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a high probability of a malfunction of the backlight converter, or of the lamps themselves, which can be checked by replacement. In such cases, it is necessary to verify the serviceability of all electrolytic capacitors of the filter according to the power supply of the inverter itself, including in the power supply unit (power supply unit).
Repairing the inverter is difficult because in case of any malfunction or emergency, even with uneven wear of the lamps, a protection is triggered, which turns it off for fire safety. Diagnostics become impossible and protection needs to be disabled.
When diagnosing with the protection off, special precautions must be taken, because there is a risk of failure of the power elements of the inverter. After the diagnosis, it is imperative to restore the protection circuits for the inverter to operate normally.
It should be remembered! Attempts to repair the TOSHIBA 22AV605PR 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!
Service Manuals with Schematic Diagrams 37 pages on model 22AV605PR
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 19AV605PR, 22AV605PR
The appearance of the MainBoard 715G3386-2 is shown in the figure below:715G3386-2
Main features of the TOSHIBA 22AV605PR device:
Installed matrix (LCD panel) LC220WXE-TBA1 75014387.
The formation of the necessary supply voltages for all nodes of the TOSHIBA 22AV605PR TV is carried out by the 715G3377-2 power module, or its analogues.
MainBoard - the main board (motherboard) is a 715G3386-2 module, using CPU chips: MST9A885GL-LF; EEPROM: 24C32; and others.
The TAFT-S710D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC220WXE-TBA1
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, Hard coating (3H)
Brightness: 350 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.7M (6-bit + Hi-FRC)
Response Time: 1.1 / 3.9 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
TOSHIBA 22AV605P LCD TV with LC220WXE-TBA1 LCD, 22 "(55 cm) diagonal display in 16: 9 format. The brightness of the screen is 350 cd / m² by CCFL (EEFL) fluorescent lamps. The ratio of maximum brightness to minimum (contrast) ) is 5000: 1. Dynamic contrast ratio of 50,000: 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 an analog system ah PAL, SECAM, NTSC. Graphic processing and formation takes place in the digital signal standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p.
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 x3, component, SCART, RGB, VGA, HDMI. 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, 1280x1024, 1360x768.
The power consumed by the TV in the operating mode from the network is 65 watts.
Overall dimensions: with stand 543x399x219 mm, without stand 543x362x68 mm.
TV Weight: with stand: 6.5 kg, without stand: 5.9 kg.
Attention! The TOSHIBA 22AV605P LCD TV panel LC220WXE-TBA1 is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!