Technical description and composition of the ERISSON 19LET35 TV, panel type and applicable modules. The composition of the modules.ERISSON LED
Model: 19LET35
Chassis / Version: TP.MS18VG.P77 MS82PT_B13273
Panel: M185XTN01.3
LED driver (backlight): integrated into MainBoard
PWM LED driver: OB3350CP
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6 LD7536R
MainBoard: TP.MS18VG.P77 MS82PT_B13273
IC MainBoard: CPU: MST3M182VGC-LF-TZ, SPI Flash: 25Q32;
Tuner: R620D
Specifications 19LET35
ERISSON 19LET35
General repair guidelines for TV LCD LED
The ERISSON 19LET35 TV, like many other electronic devices, it is advisable to start repairing by inspecting all external and internal elements. Visible damage to the elements can sometimes indicate the direction of the search for the defect even before the necessary measurements. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in solders will help the master to guess the causes and possible consequences of the malfunction.
In cases when the ERISSON 19LET35 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 at all, the power module is most likely faulty or there is no processor power on motherboard (a typical defect of some ERISSON TV models). First of all, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is cut off in the power supply, in most cases a breakdown of the power key (s) 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.
Power switches in switching power supplies (SMPS) 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 the ERISSON 19LET35 does not have an image, but there is sound and the TV is controlled by the remote control, a malfunction in the backlight circuits of the M185XTN01.3 panel is likely. The LEDs or the power converter - LED driver may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the LED driver, and check the LEDs, connecting obviously known good diagnostics.
To check the health of the LEDs, as well as contact connections in the ruler circuit, it is necessary to disassemble the panel.
A break in the line of LEDs connected in series cannot be detected with a multimeter or tester without disassembling the panel. To open all the transitions, several tens of volts are needed, and it is best to use a current source for such purposes.
Repair or diagnostics of the TP.MS18VG.P77 MS82PT_B13273 motherboard should begin by checking the stabilizers or power converters of its microcircuits. If necessary, you should update the software (software).
When repairing an MB board, you need to check its components SPI Flash: 25Q32; . Defective items should be replaced. If BGA chips are installed, their malfunction is usually localized by heating.
Remember! Attempts to self-repair by users of the ERISSON 19LET35 TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH -----------> ERISSON 19LET35 , Main: TP.MS18VG.P77 MS82PT_B13273, Panel: M185XTN01.3
The appearance of MainBoard TP.MS18VG.P77 is shown in the figure below:TP.MS18VG.P77
TP.MS18VG.P77 can be used in TVs:
ERISSON 24LET35 (Panel LVW240CMOT E1 V2), ERISSON 19LET35 (Panel M185XTN01.3), FUSION FLTV-24C10 (Panel LVW230SSOT E1 V2), FUSION FLTV-32C10 (Panel LVW320CSOT E81 V7), HYUNDAI H-LED32V19 (Panel LVW320CSOT E45 V10), HYUNDAI H-LED32V23 (Panel LVW320C80T E64 V5), TCL 19T2100 (Panel M185XTN01.2), TELEFUNKEN TF-LED32S23 (Panel LVW320CS0T E146 V1), THOMSON 32B2600 (Panel LVW320C8OT EB1), THOMSON 28B2500 (Panel LVW280CSOT E13V1).
Main features of the ERISSON 19LET35 device:
Installed matrix (LED-panel) M185XTN01.3.
To power the backlight LEDs, a converter is used, combined with the main board TP.MS18VG.P77, controlled by the OB3350CP PWM controller.
The power module is combined with the MainBoard and is designed according to a flyback AC / DC voltage converter using PWM SOT23-6 LD7536R microcircuits.
MainBoard - the main board (motherboard) is a module TP.MS18VG.P77, using CPU chips: MST3M182VGC-LF-TZ, SPI Flash: 25Q32; and others.
The R620D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: M185XTN01.3
Type: a-Si TFT-LCD, Panel
Diagonal size: 18.5 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 409.8x230.4 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 200 cd / m²
Contrast Ratio: 700: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 3.6 / 1.4 (Tr / Td)
Frequency: 60Hz
Lamp Type: 7S4P WLED Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
ERISSON 19LET35 TV with an M185XTN01.3 LCD display, 19 "(48 cm) diagonal size in 16: 9 format. The required screen brightness of 200 cd / m² is provided by LED backlighting. Contrast, as the ratio of maximum brightness to minimum, is 700: 1. Edge LED backlighting is implemented in the LED-panel of this TV - Edge LED. 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 occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i. Supported media file formats: MP3, WMA, MPEG4, Xvid, DivX, MKV, JPEG.
The power of the sound system 10 W (2x5 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 x2, component, VGA, HDMI, USB. 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, 1360x768.
Overall dimensions: 457x299x52 mm.
TV Weight: 3.1 kg.
Attention! The M185XTN01.3 panel of the ERISSON 19LET35 LED TV is an expensive and unreliable element.
Avoid any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also unsafe to get liquid on the screen. Sometimes one drop is enough if it flows down the glass onto the cables so that the TV becomes unrepairable.