Technical description and composition of the SHIVAKI LCD-2630 TV, type of panel and applicable modules. The composition of the modules.SHIVAKI
Model: LCD-2630
Chassis / Version: MST9E19A
Panel: V260B1-LN1
Inverter (backlight): integrated into PSU
Power Supply (PSU): UA-6121-1-LF
MainBoard: MST9E19A 35013160 / KL26ES60Q-Q
IC MainBoard: MST9E19A-LF
Tuner: AFT1 / 3100G
Specifications LCD-2630
SHIVAKI LCD-2630
General recommendations for repairing TV LCD
Possible malfunctions
- SHIVAKI LCD-2630 does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
With such manifestations, the UA-6121-1-LF power module usually fails. It is necessary to measure its output supply voltages, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for the probability of breakdown in PN semiconductor junctions.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short-circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the main fuse and, less often, the current sensor at the source of the key are most often cut off.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM), in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or the inverter.After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, you must ring in its converter power keys for breakdown and secondary windings of transformers for an open.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the MST9E19A motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). Sometimes they require checking or replacing (if necessary) the elements of the MainBoard board - MST9E19A-LF. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
Before replacing the AFT1 / 3100G tuner, if there is no tuning to the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
It should be remembered! Attempts to independently repair the SHIVAKI LCD-2630 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!
Repair MainBoardThe appearance of the MainBoard MST9E19A is shown in the figure below:
MST9E19A
MST9E19A can be used in TVs:
AKIRA LCT-D19MT02ST (Panel SVA190WX02TB), SHIVAKI LCD-2630 (Panel V260B1-LN1).
Main features of the device SHIVAKI LCD-2630:
Installed matrix (LCD panel) V260B1-LN1.
To power the backlight, a converter is used, combined with a power supply.
The formation of the necessary supply voltages for all nodes of the SHIVAKI LCD-2630 TV is carried out by the UA-6121-1-LF power module, or its analogues.
MainBoard - the main board (motherboard) is an MST9E19A module, using MST9E19A-LF chips and others.
The AFT1 / 3100G tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: CMO
Model: V260B1-LN1
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 575.769x323.712 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.2M (6-bit + FRC), CIE1931 72%
Response Time: 3/5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: RSDS (1 Channel), 45 pins
Voltage: 5.0 / 3.3V (VIN5 / VDD)
TV SHIVAKI LCD-2630 with LCD V260B1-LN1, diagonal size 26 "(66 cm) 16: 9 format. The brightness of the screen is 450 cd / m² backlight fluorescent lamps CCFL (EEFL). Contrast, as the ratio of maximum brightness to the minimum is 800: 1. 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 analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation going on in a hundred Dart 480i, 480p, 576i, 576p, 720p, 1080i. Stereo sound is realized by two built-in speakers. Use audio NICAM STEREO processing system.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF),. 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.
Overall dimensions: With stand 798x626x226 mm, Without stand 581x371x43 mm.
Attention! The SHIVAKI LCD-2630 LCD TV panel V260B1-LN1 is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!
