Technical description and composition of the SITRONICS LCD-2631W TV, type of panel and applicable modules. The composition of the modules.Sitronics
Model: LCD-2631W
Chassis / Version: E / RSAG.820.383A
Panel: 1280x768 15: 9
Lamp backlight: CCFL
MainBoard: RSAG.820.383A E / RSAG.820.383A
IC MainBoard: GM1501H, SST39VF040, K4D263238F, VPC3230D, 24LC32
Appearance
SITRONICS LCD-2631W
General repair guidelines for TV LCD
Any repair of electronic equipment begins with an external inspection of the device and diagnostics of the malfunction. In this case, you should visually carefully examine all the elements of the Sitronics LCD-2631W TV, both internal and external. Any external damage can sometimes prompt the repairman to take further steps to determine the malfunction of the TV and localize the defect. In some cases, faulty elements can be seen with the naked eye, for example, carbonized resistors or swollen metal-ceramic capacitors, or electrolytic in rectifier filters. Ring cracks formed in the soldered terminals of transformers or heating elements of the circuit are also frequent sources of many malfunctions with a variety of external manifestations.
If the TV does not turn on, no indicators on its front panel light or blink. Also, if the TV does not respond to the remote control and buttons, does not make any sounds or any signs of operability when turned on, there is a certain probability that the power module is defective and needs repair. Sometimes with similar manifestations a problem may occur only in the absence of processor power, but this happens much less often. It is advisable to start the troubleshooting of the power supply module by checking the mains fuse. If it is torn off, 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 breakdown conditions in such situations.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors of the N-FET type fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, or dried electrolytic capacitors or dangling resistors of the primary power supply circuit, involved in the stabilization process. In this case, all semiconductor elements of the binding of the PWM controller microcircuit are subject to verification, which it is desirable to verify by replacement.
In cases where the Power Factor Corrector (PFC) is used in the power supply, troubleshooting can be a bit more complicated.
If there is no image when you turn on the Sitronics LCD-2631W, or it appears for a second and disappears completely, but there is sound, most likely either the backlight or the power converter (inverter) are malfunctioning. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the general power supply unit.
Diagnostics of the inverter can be difficult due to the operation of the protection, which is organized by the designers to prevent negative consequences or fires in emergency cases, for example, during short circuits or breaks in the lamp power supply circuit, as well as their possible depressurization. To make the necessary measurements at control points or to take the necessary waveforms, repairmen have to block the protection circuits in order to be able to diagnose.
Turning off the protection for diagnostic purposes, it must be remembered that in this case there is a risk of failure of the power elements of the inverter. Upon completion of the diagnosis, all regular protection circuits should be restored.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software). Board repair and chip replacement GM1501H SST39VF040 K4D263238F VPC3230D 24LC32 are carried out with the necessary equipment, and the corresponding element base.
It should be remembered! Attempts to repair the Sitronics LCD-2631W TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
FIRMWARE FOR SPI FLASH -----------> Sitronics LCD-2631W E/RSAG.820.383A, Main: RSAG.820.383A E/RSAG.820.383A, Panel: 1280x768 15:9
TFT technology, Diagonal 26-inch, 1280 x 768, 15: 9 Brightness 450 cd / m2, Dynamic contrast 400: 1: 1, Response time 17 ms, Horizontal viewing angle 176 °Main features of the SITRONICS LCD-2631W device:
Installed matrix (LCD panel) 1280x768 15: 9.
The required supply voltage for all nodes of the SITRONICS LCD-2631W TV is provided by a switching power supply.
MainBoard - the main board (motherboard) is an RSAG.820.383A module, using microcircuits GM1501H, SST39VF040, K4D263238F, VPC3230D, 24LC32 and others.