Technical description and composition of the TV SHIVAKI STV-22L6, type of panel and applicable modules. The composition of the modules.SHIVAKI
Model: STV-22L6
Chassis / Version: L2M18 (03) 20-ASCH903-14-0X
Panel: L216B1-L02 Rev. C1 // V216B1-L01
T-CON: V216B1-XC01 CM1671B
Inverter (backlight): LK-IN220417A
PWM Inverter: OB3302CP
MOSFET Inverter: AO4828
Power Supply (PSU): HGPKS03 REV.5-2
PWM Power: LD7575PS, STK0765
MainBoard: L2M18 (03) - 20-ASCH903-14-0X - BLRT903N-01-H // L2M23 (01)
IC MainBoard: EN25F40, 24C32, SA7454, MX25L3205, FT24C32A
Tuner: UVL7705VEAW1
Technical Specifications STV-22L6
SHIVAKI STV-22L6
General recommendations for repairing TV LCD
Like any other TV, it is advisable to start the SHIVAKI STV-22L6 repair with an external examination of the visible changes in the external and internal elements. Often, for certain external signs, the repairman can draw some 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. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
In cases where the SHIVAKI STV-22L6 TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink, and there are no sounds and no signs of operability when turning on, the power module is most likely faulty or, what it happens much less often - there is no processor power on the motherboard. If the mains fuse is broken in the power supply, in most cases a breakdown of the power switch 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.
The reasons for the breakdown of the power switch of the flyback converter of the power module can be different, for example, a malfunction of semiconductor cells or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the PWM controller chip or breakage of the resistors in its bundle.
When using the Active Power Factor Correction (CMC) circuitry in the power module, the search for faulty elements is somewhat more complicated.
If there is no image when you turn on the SHIVAKI STV-22L6, 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.
When repairing the inverter, it is often necessary for diagnostics to turn off the protection, which, for the purpose of fire safety, turns it off in any emergency situation, for example, during a malfunction or uneven wear of the lamps, which makes it difficult to find a defect.
Turning off the protection for diagnostic purposes, it must be remembered that in this case there is a risk of failure of the power elements of the inverter. Upon completion of the diagnosis, all regular protection circuits should be restored.
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). In some cases, to repair the MB board (SSB), it may be necessary to replace the chips - EN25F40, 24C32, SA7454, MX25L3205, FT24C32A with new or obviously working ones.
It should be remembered! Attempts to repair the SHIVAKI STV-22L6 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 DIAGRAM / SERVICE MANUAL ------------------> SHIVAKI STV19L6, STV22L6, CHASSIS L2M18, CPU: MST9E19.zip
FIRMWARE FOR SPI FLASH -----------> SHIVAKI STV22L6, Main: L2M23(01),Panel: V216B1-L01, T-CON: V216B1-XC01
The appearance of the MainBoard L2M18 (03) is shown in the figure below:L2M18 (03)
L2M18 (03) can be used in TVs:
BBK LD1913SU (Panel HT185WX1-100), BBK LD2213SU Ver1 (Panel M216H1-L01 RevC1 LTA216AT01), BBK LD2213SU Ver2 (Panel LCD LC220WXE-TBA1), SHIVAKI STV-22L6 (Panel L216B1-L02 Rev.C1).
Main features of the SHIVAKI STV-22L6 device:
Installed matrix (LCD panel) L216B1-L02 Rev. C1 or V216B1-L01.
The matrix control uses the Timing Controller (T-CON) V216B1-XC01.
To power the backlight, an inverter LK-IN220417A is used, it is controlled by the PWM controller OB3302CP. As power elements of the inverter, keys of the type AO4828 are used.
The necessary supply voltages for all nodes of the TV SHIVAKI STV-22L6 are formed by the power module HGPKS03, or its analogs using microcircuits LD7575PS, STK0765.
MainBoard - the main board (motherboard) is an L2M18 (03) module, using chips EN25F40, 24C32, SA7454, MX25L3205, FT24C32A and others.
The tuner UVL7705VEAW1 provides reception of television programs and tuning to channels.
Information from an alternative source:
SHIVAKI STV-22L6
Panel Type (Matrix): V216B1-L01,
Motherboard: L2M23 (01), MST9E19B-LF, EN25F40-100GCP, 24C32WP, TDA9886TS, MP1484EN, SGM330A x2, 24C02WP x2, SA7454, UTC4558E, Tuner: UVL7705VEAW1
T-con: V216B1-XC01, CM1671B
Invertor: LK-IN220417A, OB3302CP, AO4828,
PSU: HGPKS03 / REV5-2, LD7575PS, STK0765, MBFR20100CT
Remote control: BT0534, Circuit L2M23 (01),
TV SHIVAKI STV-22L6 with LCD L216B1-L02, diagonal size 22 "(55 cm) 16:10 format. The brightness of the screen is 300 cd / m² with fluorescent lights CCFL (EEFL). Contrast, as the ratio of maximum brightness to the minimum is 1000: 1. You can view images in high quality HD at a resolution of 1680x1050 pixels in the standard for 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 going on in st andarts 480i, 480p, 576i, 576p, 720p, 1080i.
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, 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.
Overall dimensions: With a support of 581x406x180 mm, Without a support of 581x371x43 mm.
Attention! The SHIVAKI STV-22L6 LCD TV panel L216B1-L02 Rev. C1 is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!