Technical description and composition of the TV SHIVAKI STV-20L3, type of panel and applicable modules. The composition of the modules.SHIVAKI
Model: STV-20L3
Panel: SHFA070089763
Inverter (backlight): Haider IVA20601D REV03 PC40003J --- 1CG CCE-VOE166702
PWM Inverter: OZ9938GN (16) PH5ADFAN7311
MOSFET Inverter: FDS 8958A (SO8)
Trans Inverter: TM-1013 ---- 1F FURI-070917
Power Supply (PSU): Haider HDAD60W102-OF REV2.1 CCE-VOE166702
PWM Power: LD7552BP (SO8) STK0766
MOSFET Power: 6N52JP02 (SO8)
MainBoard: FA20176-2--31G PA-20176-2—2TG
IC MainBoard: TDA15021H / N1C00, 24C16AN, MST9010SA-LF, AN17825A, 74HC153D, KF9650
Tuner: TDQ-6F6 / W126D
Control: BT-0451C ... CBG
Technical Specifications STV-20L3
SHIVAKI STV-20L3
General recommendations for repairing TV LCD
It is advisable to start diagnosing the malfunction of the SHIVAKI STV-20L3 TV, like all others, with an external examination of possible changes, both external and internal elements. Visible damage to elements can sometimes suggest further directions for finding a defect before starting the necessary measurements. 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.
Sometimes the SHIVAKI STV-20L3 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 Haider HDAD60W102-OF REV2.1 CCE-VOE166702 common power supply module. If the mains fuse is broken in the power supply, in most cases a breakdown of the power switch 6N52JP02 (SO8) 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 the N-FET keys used in flyback converters rarely fail for no reason that must be sought by checking other elements of the circuit. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip LD7552BP (SO8) STK0766 can also cause a breakdown of the power switch of the converter.
In cases where the Power Factor Corrector (PFC) is used in the power supply, troubleshooting can be a bit more complicated.
Sometimes the SHIVAKI STV-20L3 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).
Diagnostics of the Haider IVA20601D REV03 PC40003J inverter --- 1CG CCE-VOE166702 can be difficult due to the protection being triggered by the designers to prevent negative consequences or fires in emergency cases, for example, during short circuits or open circuits in the lamp power supply circuit, as well as their possible depressurization. To make the necessary measurements at control points or to take the necessary waveforms, repairmen have to block the protection circuits in order to be able to diagnose.
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.
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). If it is not possible to replace the MB (SSB) card, you need to check the health of its elements - TDA15021H / N1C00, 24C16AN, MST9010SA-LF, AN17825A, 74HC153D, KF9650. Defective components should be replaced.
Attention to users! Self-repair of a SHIVAKI STV-20L3 TV without the appropriate qualifications and experience can lead to its complete non-repairability!
Main features of the SHIVAKI STV-20L3 device:Installed matrix (LCD panel) SHFA070089763.
A Haider inverter is used to power the backlight, controlled by the OZ9938GN (16) PH5ADFAN7311 PWM controller. The transformer TM-1013 ---- 1F FURI-070917 is installed in the inverter converter. As power elements of the inverter, keys of the FDS 8958A (SO8) type are used.
The necessary supply voltages for all nodes of the SHIVAKI STV-20L3 TV are generated by the Haider power supply module or its analogs using LD7552BP (SO8) STK0766 microcircuits and 6N52JP02 (SO8) type power switches.
MainBoard - the main board (motherboard) is an FA20176-2-31G module, using TDA15021H / N1C00, 24C16AN, MST9010SA-LF, AN17825A, 74HC153D, KF9650, and others microcircuits.
The TDQ-6F6 / W126D tuner provides TV reception and channel tuning.
Information from an alternative source:
SHIVAKI STV-20L3 KALININGRAD
Panel Type (Matrix) :, SHFA070089763 Central Board PA-20176-2—2TG:, TDA15021H / N1C00, 24C16AN, MST9010SA-LF, AN17825A, 74HC153D, KF9650 Tuner :, TDQ-6F6 / W126D Power Supply CCE-VE16, Saniton CCE-VO1616 -32-004 - imp. Trans, Cosmo1010 / 817 - optocoupler, A3762C Inverter PC40003J --- 1CG \ CCE-VOE166702 :, PH5AD \ FAN7311, 8958A- 4pcs, Trans - TM-1013 ---- 1F \ FURI-070917 - 6pcs..
SHIVAKI STV-20L3 TV with SHFA070089763 LCD, 20 "diagonal size, 4: 3 format. Screen brightness of 450 cd / m² is provided by CCFL (EEFL) fluorescent lamps. Contrast ratio, as the ratio of maximum brightness to minimum, is 700: 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 acoustic system of sound 6 W (2x3W) 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, 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.
Overall dimensions: With a support of 540x440x200 mm, Without a support of 540x410x80 mm.
Attention! The panel SHFA070089763 LCD-TV SHIVAKI STV-20L3 is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!