Technical description and composition of the DIGITAL DL-15J82 TV, type of panel and applicable modules. The composition of the modules.Digital
Model: DL-15J82
Chassis / Version: JPE-MST718
Panel: M150XN07
Lamp backlight: 2 Lamp CCFL
Inverter (backlight): 12V 2 Lamp CCFL
MainBoard: JPE-MST718
IC MainBoard: MST718BU-LF, PS25LV020, 24C32, TDA7496, TDA9886TS
Tuner: ET-5C511-BS1A
Technical Specifications DL-15J82
DIGITAL DL-15J82
General recommendations for repairing TV LCD
Possible malfunctions
- The DIGITAL DL-15J82 TV does not turn on at all. There is no reaction to the remote control or to the control buttons from the front panel. Indicator lights do not light or flash.
In such cases, the power supply is usually faulty. It is necessary to measure the output voltages in the secondary circuits, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for a short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during a short circuit in the elements of the primary circuit, the mains fuse usually breaks.
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. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power switch may be PWM (PWM). It is checked only by replacement with a known good one.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
These manifestations can be triggered by a power module, or by defects in the inverter, as well as a distortion of the currents in the lamps due to their uneven wear. After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, it is necessary to ring in its converter the power switches for breakdown and the secondary windings of the 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 TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the JPE-MST718 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). When repairing an MB board, you need to check its components MST718BU-LF, PS25LV020, 24C32, TDA7496, TDA9886TS. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
If there is no reception of television channels, but the TV is working properly from external devices, first of all you need to check the voltage of the tuner ET-5C511-BS1A and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
For owners of the DL-15J82 TV, we recommend that you contact qualified personnel with the necessary work experience for repairs! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!
Image format 4: 3, Diagonal of 15 inches, 1024x768, Viewing angle 178, Brightness 500 cd / m2, Contrast ratio 1200: 1
Repair MainBoard
The appearance of the MainBoard JPE-MST718 is shown in the figure below:
JPE-MST718
JPE-MST718 can be used in TVs:
DIGITAL DL-15J82 (Panel M150XN07), DIGITAL DL-20J80 (Panel SVA201VG01TB), DIGITAL DL-20J85 (Panel M201EW02), DIGITAL DL-26J82 (Panel T260XW02), DIGITAL DL-32J82 (Panel T315XW02).
Main features of the DIGITAL DL-15J82 device:
Installed matrix (LCD panel) M150XN07.
A 12V inverter is used to power the backlight.
The required supply voltage for all nodes of the TV DIGITAL DL-15J82 provides a switching power supply.
MainBoard - the main board (motherboard) is a JPE-MST718 module, using microchips MST718BU-LF, PS25LV020, 24C32, TDA7496, TDA9886TS and others.
The ET-5C511-BS1A tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: M150XN07 V5
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
Surface: Antiglare, Hard coating (3H)
Brightness: 270 cd / m²
Contrast Ratio: 600: 1
Display Colors: 16.2M (6-bit + FRC)
Response Time: 3/13 (Tr / Td)
Frequency: 60Hz
Lamp Type: 2 pcs CCFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 20 pins
Voltage: 3.3V
