Technical description and composition of the SITRONICS LCD-1501 TV, type of panel and applicable modules. The composition of the modules.Sitronics
Model: LCD-1501
Panel: HSD150MX15
Inverter (backlight): BLIS02020 ver3.0
PWM Inverter: BIT3102A (8)
MOSFET Inverter: AO4404 (8)
MainBoard: E3703-001013-1
IC MainBoard: SAA5264PS / M3 / 0104 MX88L284AEC AIC1084-33CM AC1501
Appearance
SITRONICS LCD-1501
General repair guidelines for TV LCD
It is advisable to start any repair and diagnostics of the Sitronics LCD-1501 TV with a careful external examination of the internal and external elements, including case details, display, buttons and cables. Sometimes, only by some signs can we determine the further direction of the localization of the malfunction. Swollen electrolytic or cermet capacitors, charred resistors, ring cracks in the soldered terminals of the elements - all this can significantly help the master to determine the causes and consequences of the malfunction of the TV.
If Sitronics LCD-1501 does not turn on, no control lights on the front panel light up or blink, therefore, there is a very high probability of a power module malfunction. 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.
In most cases, a breakdown of the N-Fet converter key does not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM chip from the manufacturer.
If an active Power Factor Corrector (CMC) is used in the power module circuitry, it is sometimes more difficult to troubleshoot. Knowledge, experience, intuition and skills in such cases have a great advantage for a successful repair.
In cases where the Sitronics LCD-1501 TV has lost an image, and the sound is there and all the other functions are operational, there is a possibility of a malfunction of the inverter (converter for powering the backlight). When you turn on the TV, the image may appear briefly and immediately disappear. It must be borne in mind that with such manifestations, the lamps themselves also fail, the malfunction of which can be detected by replacement, by connecting to the connectors for diagnostics that are known to be serviceable and suitable in power.
Repairing the BLIS02020 ver3.0 inverter is difficult because in case of any malfunction or abnormal situation, even if the lamps are unevenly worn, protection is triggered, which turns it off for fire safety purposes. Diagnostics become impossible and protection needs to be disabled.
In these cases, special care must be taken in view of the risk of failure of the power elements. After completing all repairs, it is imperative to restore the protection circuits for full and safe further operation of the TV by the user.
Diagnosis and repair of the E3703-001013-1 motherboard is carried out by checking the performance of power stabilizers or updating the software (software). Repair of the board and replacement of the SAA5264PS / M3 / 0104 MX88L284AEC AIC1084-33CM AC1501 microcircuit are carried out with the necessary equipment and the corresponding element base.
Attention to users! Self-repair of a Sitronics LCD-1501 TV without the appropriate qualifications and experience can lead to its complete non-repairability.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Sitronics LCD-1501
Main technical specifications:
TFT technology, Diagonal 15-inch, 1024 x 768, 4: 3, Grain size 0.297 mm, Horizontal viewing angle 170 °, Vertical viewing angle 170 °,
Main features of the SITRONICS LCD-1501 device:
Installed matrix (LCD panel) HSD150MX15.
The BLIS02020 inverter is used to power the backlight lamps; it is controlled by the BIT3102A PWM controller (8). As power elements of the inverter, keys of the AO4404 type (8) are used.
The required supply voltage for all nodes of the SITRONICS LCD-1501 TV is provided by a switching power supply.
MainBoard - the main board (motherboard) is an E3703-001013-1 module, using SAA5264PS / M3 / 0104 MX88L284AEC AIC1084-33CM AC1501 chips and others.