Technical description and composition of the TV SHARP LC-15S1E, type of panel and applicable modules. The composition of the modules.SHARP
Model: LC-15S1E
Panel: LQ150V3FZ50
Inverter (backlight): SB984WJ
PWM Inverter: 2SC5886 K2503
MOSFET Inverter: 2SC5886 K2503
Trans Inverter: A033WJ D393
Power Supply (PSU): Adapter UADP-A043WJPZ, output + 12V 5.0A
MainBoard: SB984WJ KB988DE
IC MainBoard: MSP34106 B8 V3, LA4635A, DPS9450A A1, BD8120FP, SDA5550 M, RH-IXA661WJZZ, 4560, 2147
Control: GAO74WJSA
Technical Specifications LC-15S1E
SHARP LC-15S1E
General recommendations for repairing TV LCD
Repair SHARP LC-15S1E must begin with the diagnosis of the malfunction and a thorough inspection of its external and internal components, including the case. 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, charred 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 adapter UADP-A043WJPZ power supply module is malfunctioning, output + 12V 5.0A, the external manifestations may be different, for example, the SHARP LC-15S1E does not turn on at all and there is no indication of the indicator lights on the front panel. When diagnosing and repairing the power supply, first of all, it is necessary to check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module - rectifier diodes or power switch.
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.
When using the Active Power Factor Correction (CMC) circuitry in the power module, the search for faulty elements is somewhat more complicated.
If, when you turn on the TV, the image appears and immediately disappears, or is initially absent when you turn on, but there is sound and other functions work, there is a high probability of a malfunction of the inverter (power converter for the backlight). In such cases, the lamps, the inverter and the common power module are subject to verification, in which the electrolytic capacitors of the rectifier filter feeding the inverter should be checked.
Diagnostics of the SB984WJ 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.
On the SB984WJ, KB988DE motherboard, in case of a malfunction, you should first check the operation of all power supply stabilizers of the microcircuits and, if necessary, update the software (software). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - MSP34106 B8 V3, LA4635A, DPS9450A A1, BD8120FP, SDA5550 M, RH-IXA661WJZZ, 4560, 2147 and replace failed chips with new ones.
Attention to users! Self-repair of a TV SHARP LC-15S1E without the appropriate qualifications and experience can lead to its complete non-repairability!
Service Manual with Schematic Diagram 68 pages 2003 model LC-13S1E, LC-15S1E.
Service manual / schematic diagram --------------------> SHARP LC-13S1E, LC-15S1E
Main features of the SHARP LC-15S1E device:Installed matrix (LCD panel) LQ150V3FZ50.
To power the backlight, an SB984WJ inverter is used, it is controlled by a 2SC5886 K2503 PWM controller. A transformer A033WJ D393 is installed in the inverter converter. As power elements of the inverter, keys of the type 2SC5886 K2503 are used.
To power all the internal nodes of the SHARP LC-15S1E TV, an external adapter type UADP-A043WJPZ, output + 12V 5.0A is used.
MainBoard - the main board (motherboard) is an SB984WJ module, using microchips MSP34106 B8 V3, LA4635A, DPS9450A A1, BD8120FP, SDA5550 M, RH-IXA661WJZZ, 4560, 2147 and others.
Information from an alternative source:
Sharp LC-15S1E Board SB984WJ :, MSP34106 B8 V3, LA4635A, LC15S1EE - Tuner, A033WJ D393 - inverter transformers, 2SC5886, K2503, 2377, 2147, 4560 external UADP-A043WJPZ, output + 12V \ 5.0A Remote GAO74WJSA
Additional technical information about the panel:
Brand: SHARP
Model: LQ150V3FZ50
Type: a-Si TFT-LCD, Panel
Diagonal size: 15.0 inch
Resolution: 640x480, VGA
Display Mode: Transmissive
Lamp Type: CCFL
Signal Interface: Analog