Technical description and composition of the ERISSON 20LM01 TV, panel type and applicable modules. The composition of the modules.ERISSON
Model: 20LM01
Chassis / Version: PA20155-2-3TG
Panel: LC201V02
Lamp backlight: 6 Lamp CCFL
Power Supply (PSU): Adapter 12V
MainBoard: PA20155-2 --3TG MEK SHFA06
IC MainBoard: CPU: MST9010SA-LF, VIDEO: TDA15063H / N1C00 37, Eeprom: 24C16, Audio: AN17825A
Tuner: TDQ-6F6 / W128D
Specifications 20LM01
ERISSON 20LM01
General recommendations for repairing TV LCD
Repair of the ERISSON 20LM01 TV is better to start with a thorough external inspection and troubleshooting. It is advisable to carefully examine the internal and external components. Any external damage can sometimes prompt the repairman to take further steps to determine the malfunction of the TV and localize the defect. In most cases, the repairman can guess the causes of the defect and possible consequences by the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of element leads, swollen rectifier filter capacitors, charred resistors and other circuit elements.
In cases when the ERISSON 20LM01 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, which happens much less often, there is no processor power on the motherboard. In this case, the diagnosis and repair of the common power supply should always be started by checking the mains fuse. When it breaks, it is advisable to check for a breakdown, first of all, all power semiconductor elements of the converter and the rectifier diode bridge of the network, as well as the large electrolytic capacitor of the filter of the network rectifier and the key transistor.
As a rule, the keys of flyback converters, which use an N-Fet field effect transistor on a separate radiator, or integrated with a PWM controller in a single chip, are reliable enough and rarely fail for no reason. The reasons for the breakdown of the key should be sought by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is verified by replacing it with a known good one.
When using the Active Power Factor Correction (CMC) circuitry in the power module, the search for faulty elements is somewhat more complicated.
If the ERISSON 20LM01 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.
Often attempts to repair the inverter are hampered by the fact that the fault diagnosis is complicated by the operation of its protection, which is designed to turn off the inverter in emergency conditions - when the lamps are depressurized, breaks or short circuits in high-voltage connections and other emergency situations. Lock protection to localize the defect is popular among repairmen.
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.
In cases of attempts to repair the MEK SHFA06 motherboard, it is necessary to check the operability of the power supply stabilizers of the microcircuits and, if possible, update the software (software). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements TDA15063H (Ver: LM14E04S20), 24C16, MST9010SA-LF.
Attention to users! Self-repair of the ERISSON 20LM01 TV without the appropriate qualifications and experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH -----------> ERISSON 20LM01, Main: PA20155-2 --3TG MEK SHFA06, Panel: LC201V02
The appearance of MainBoard PA20155-2 is shown in the figure below:PA20155-2
PA20155-2 can be used in TVs:
ERISSON 20LM01 (Panel LC201V02), ERISSON 32LET20 (Panel LC201V02).
Main features of the ERISSON 20LM01 device:
Installed matrix (LCD panel) LC201V02.
To power all internal nodes of the ERISSON 20LM01 TV, an external adapter 12V type is used.
MainBoard - the main board (motherboard) is a PA20155-2 module using CPU chips: MST9010SA-LF, VIDEO: TDA15063H / N1C00 37, Eeprom: 24C16, Audio: AN17825A and others.
The TDQ-6F6 / W128D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC201V02-SDA3
Type: a-Si TFT-LCD, Panel
Diagonal size: 20.1 inch
Resolution: 640x480, VGA
Display Mode: IPS, Normally Black, Transmissive
Active Area: 408x306 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.7M (8-bit)
Response Time: 12/13 (Tr / Td)
Frequency: 60Hz
Lamp Type: 6 pcs CCFL Without Driver
Signal Interface: CMOS (1 ch, 8-bit), 41 pins
Voltage: 12.0V