Technical description and composition of the ERISSON 15LA20 TV, panel type and applicable modules. The composition of the modules.ERISSON
Model: 15LA20
Chassis / Version: B.MSTB2C
Panel: SVA150XG10TB
T-CON: 150PW323S
Inverter (backlight): INV060521S 150PW323S (INVERTER BOARD)
PWM Inverter: KA7500C, LA0823
MOSFET Inverter: 4506
Power Supply (PSU): Adapter 12V
MainBoard: B.MSTB2C 7363
IC MainBoard: TDA1517P, TDA9886TS,
Tuner: TDQ-6F6 / T126CW
Specifications 15LA20
ERISSON 15LA20
General recommendations for repairing TV LCD
ERISSON 15LA20 TV, like any other, it is advisable to start repairing with an inspection of the internal and external visible physical visual changes. Many visible signs make it possible to determine the future direction of troubleshooting and localization of the defect. Experienced repairmen are often aware of the causes of the defect and 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.
In case of a power supply module malfunction, external manifestations may be different, for example, ERISSON 15LA20 does not turn on at all and there is no indication of control lights on the front panel. It is advisable to start the troubleshooting of the power supply module by checking the mains fuse. If it is torn, it is necessary to check first of all the power semiconductor elements - rectifier diodes and the power switch of the converter, which are often found in a breakdown state in such situations.
If a breakdown of the power switch of the flyback converter of the power supply unit is detected, it should be remembered that it does not fail without any reasons that should be sought by checking other elements of the primary circuit - electrolytic capacitors, a PWM controller that can only be checked by replacement, as well as others semiconductor elements (diodes, transistors, zener diodes).
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.
If the ERISSON 15LA20 does not have an image, but there is sound, there is a possibility of a malfunction of the backlight or power converter. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
In most cases, the diagnosis and repair of the INV060521S 150PW323S inverter (INVERTER BOARD) is difficult due to the organization of protection, which turns it off in emergency cases to avoid fires during short circuits or open circuits in high voltage circuits and during depressurization of lamps. Often, repairmen block the protection circuits in order to make the necessary measurements at the control points of the inverter to identify the causes of the defect.
It should be remembered that in such cases there is a risk of failure of the power elements of the inverter and to take special care. After carrying out repairs, the protection circuit must be restored for further safe operation of the TV.
The motherboard must be checked if there is no reaction to the remote control and function buttons, the standby indicator blinks or lights up constantly. In such cases, if the power supply circuits of the microcircuits are working, a software update may be necessary. Board repair and replacement of TDA1517P, TDA9886TS microcircuits are carried out with the necessary equipment, and the corresponding element base.
Attention to the owners! Attempts at self-repair of the ERISSON 15LA20 TV are not recommended by the manufacturer and can lead to serious negative consequences!
Repair MainBoardThe appearance of MainBoard B.MSTB2C is shown in the figure below:
B.MSTB2C
Main features of the ERISSON 15LA20 device:
Installed matrix (LCD panel) SVA150XG10TB.
The matrix control uses the Timing Controller (T-CON) 150PW323S.
The INV060521S inverter is used to power the backlight, it is controlled by the KA7500C, LA0823 PWM controller. As power elements of the inverter, keys of type 4506 are used.
To power all internal components of the ERISSON 15LA20 TV, an external adapter 12V type is used.
MainBoard - the main board (motherboard) is a B.MSTB2C module, using TDA1517P, TDA9886TS, and others.
The TDQ-6F6 / T126CW tuner provides TV reception and channel tuning.
Information from an alternative source:
Erisson 15LA20
Motherboard :, Sound - TDA1517P, TDA9886TS, TDQ-6F6 / T126CW
Invertor: INV060521S, KA7500C, LA0823, 4506
T-con: 150PW323S, 4om / 5wt - Speaker
Additional technical information about the panel:
Brand: SVA-NEC
Model: SVA150XG10TB
Type: a-Si TFT-LCD, Panel
Diagonal size: 15.0 inch
Resolution: 1024x768, XGA
Display Mode: TN, Normally White, Transmissive
Active Area: 304.128x228.096 mm
Brightness: 250 cd / m²
Contrast Ratio: 600 :one
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 60%
Response Time: 2/6 (Tr / Td)
Frequency: 60Hz
Lamp Type: 2 pcs CCFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 20 pins
Voltage: 3.3V
Brand: ERISSON, Model: 15LA20.
Shortly from the TV: LCD, 720p HD, diagonal 15 ", there is HDMI.
The composition uses MainBoard B.MSTB2C 7363 and an LCD panel (matrix) SVA150XG10TB.
Power supply unit external Adapter 12V.
Technical description
TV ERISSON 15LA20 with LCD SVA150XG10TB, diagonal size 15 "format 4: 3. The brightness of the screen is 500 cd / m² backlight fluorescent lamps CCFL (EEFL). Contrast, as the ratio of maximum brightness to minimum, is 500: 1. Possible viewing images in high quality HD at a resolution of 1024x768 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 occurs in the standard x 480i, 480p, 576i, 576p, 720p, 1080i.
The power of the acoustic system of sound 6 W (2x3 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 x2, S-Video, component, 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.
The power consumed by the TV in the operating mode from the network is 42 watts.
Dimensions: With stand 550x443x175 mm, Without stand 550x411x82 mm.
Attention! The SVA150XG10TB panel of an ERISSON 15LA20 LCD TV is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!