Technical description and composition of the ERISSON 20LS01 TV, panel type and applicable modules. The composition of the modules.ERISSON
Model: 20LS01
Chassis / Version: 8T84
Panel: 20 inch 640 x 480
Inverter (backlight): Inverter_CCFL_4lamp
Power Supply (PSU): Adapter 12V
MainBoard: 8T84 MAIN
IC MainBoard: TDA15521E / N1C80, 24C32, TDA1517AW, 39VF020
Tuner: TDQ-6F6 / W126CWA
Specifications 20LS01
ERISSON 20LS01
General recommendations for repairing TV LCD
Like any other TV, ERISSON 20LS01 option 2 repair is advisable to start with an external inspection of the visible changes in the external and internal elements. Visible damage to elements can sometimes suggest further directions for finding a defect before starting the necessary measurements. Experienced repairmen are often aware of the causes of the defect and the 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 cases where the ERISSON 20LS01 option 2 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, what it happens much less often - there is no processor power on the motherboard. When diagnosing and repairing the power supply, it is necessary first of all to check the fuse, and if it breaks, you should check the power switch and rectifier bridge diodes for avalanche (thermal) breakdown.
It should be remembered that in the practice of repair, usually the power keys of N-Fet converters do not fail due to their poor quality and, in such cases, it is necessary to look for the reason that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the PWM controller chip itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
When using the Active Power Factor Correction (CMC) circuitry in the power module, the search for faulty elements is somewhat more complicated.
If ERISSON 20LS01 option 2 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 an inverter 6lamp XN-101 are complicated by the fact that the diagnosis of a malfunction 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.
In such cases, special care should be taken during diagnostics, and after completion of all repair work, it is necessary to restore the circuit and the inverter protection for further safe operation of the TV.
In cases of attempts to repair the motherboard, it is necessary to check the operability of the power stabilizers of the microcircuits and, if possible, update the software (software). Board repair and chip replacement are carried out with the necessary equipment, and the corresponding element base.
Owners and users of the ERISSON 20LS01 TV option 2 must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
Main features of the ERISSON 20LS01 device:
Installed matrix (LCD-panel) 20 inches 640 x 480.
Inverter_CCFL_4lamp is used to power the backlight.
To power all internal nodes of the ERISSON 20LS01 TV, an external adapter 12V type is used.
MainBoard - the main board (motherboard) is an 8T84 module, using TDA15521E / N1C80, 24C32, TDA1517AW, 39VF020 and others.
The TDQ-6F6 / W126CWA tuner provides TV reception and channel tuning.