Technical description and composition of the SHARP LC-32P50E TV, type of panel and applicable modules. The composition of the modules.SHARP
Model: LC-32P50E
Chassis / Version: KD186
Panel: LC320W01 (SL) (A1) // 17MB22
T-CON: QKITPD186WJN3 - KD186 - XD186WJ
Inverter (backlight): RUNTKA152WJZZ - PSC10124H M - PKG2 - RUNTKAW153WJZZ - PSC20222E M - PKG5
Power Supply (PSU): RDENCA122WJZZ - PSC10125F M PKG1
PWM Power: STR-A6159M (Standby), MC33262D (PFC), SPF9001
MainBoard: XD187WJ - KD187
IC MainBoard: MM1630EQ, MSP3413G1E, IXB427WJ, 24C64, IXB405WJ, SIL9021
Tuner: QA021WJ, RTUNQA021WJZZ
Technical Specifications LC-32P50E
SHARP LC-32P50E
General recommendations for repairing 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 SHARP LC-32P50E TV, both internal and external. Sometimes, only by some signs can we determine the further direction of the localization of the malfunction. Ring cracks in the soldering of the leads of the heating elements, swollen electrolytic capacitors, a charred paint layer on the resistors - all this for the repairman can be a hint in the assumptions about the causes and consequences of the malfunction.
If the TV does not turn on, no indicators on its front panel are lit or blinking. 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 can only occur in the absence of processor power, but this happens much less often. In this case, first of all, it is necessary to check the fuse at the input of the network. If it is broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the N-FET converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Possible options.
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 quite reliable 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.
In cases where the Power Factor Corrector (PFC) is used in the power supply, troubleshooting can be a bit more complicated.
If the SHARP LC-32P50E 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.
Diagnosis and repair of the inverter is often complicated by the organization of special protection circuits, which is necessary for fire safety and turns off the inverter in any emergency situation, for example, when the lamps are worn or depressurized. Often, to localize a defect, its blocking is required.
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 some cases, it is necessary to check or replace (if necessary) the elements of the MB board (SSB) - VCT 6953G 24C64.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of electronic equipment repair.
Service manual / schematic diagram --------------> Sharp LC-26P50E, LC-32P50E, LC-37P50E
Service manual / schematic diagram --------------> Sharp LC-32P50E Shassis VESTEL 17MB22-2
The appearance of the MainBoard XD187WJ is shown in the figure below:Xd187wj
XD187WJ can be used in TVs:
SHARP LC-32P50E (Panel LC320W01 (SL) (A1)), SHARP LC-26P50E (Panel LK255P3FZA1).
PSU Advanced
According to the conditions of compliance with modern world standards for household switching power supplies, the RDENCA122WJZZ module provides for the use of a Power Factor Correction unit. The PFC circuit is a flyback converter based on the MC33262D PWM controller. The reactance of an electrolytic capacitor of a line filter at a frequency of 50-60 Hz is usually not more than 20-30 ohms and its charge directly from the network through open diodes could reach tens of amperes per pulse if no filtering were applied.
As a result of the PFC conversion, an increased voltage on the capacitor (about 380V) cannot directly open the rectifier diodes, on the anode of which the voltage will always be slightly less (about 300V) and then its charging current will always be limited by the elements of the PWM controller. As a result, the envelope of the high-frequency pulses of the consumed current will repeat the shape and phase of the input sinusoidal voltage. The presence of an increased voltage (+ 380V) on the network capacitor indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the SHARP LC-32P50E device:
Installed matrix (LCD panel) LC320W01 (SL) (A1) or 17MB22.
The matrix control uses the Timing Controller (T-CON) QKITPD186WJN3.
To power the backlight used inverter RUNTKA152WJZZ.
The necessary supply voltages for all nodes of the SHARP LC-32P50E TV are generated by the RDENCA122WJZZ power supply module or its analogs using the STR-A6159M (Standby), MC33262D (PFC), SPF9001 microcircuits.
MainBoard - the main board (motherboard) is an XD187WJ module, using microchips MM1630EQ, MSP3413G1E, IXB427WJ, 24C64, IXB405WJ, SIL9021 and others.
Tuner QA021WJ, RTUNQA021WJZZ provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC320W01-SLA1
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8/10 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: 14 pcs EEFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
LCD TV SHARP LC-32P50E with LCD display LC320W01, diagonal size 32 "(81 cm) 16: 9 format. Brightness of the glow of the screen 450 cd / m² organized by backlighting with CCFL fluorescent lamps (EEFL). Contrast, as the ratio of maximum brightness to minimum, not less than 800: 1. The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation takes place in the standards 480i, 480p, 576i, 576p.
The power of the sound speaker system 20 W (2x10 W) provide two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, S-Video, component, SCART x2, RGB, HDMI. An output for connecting headphones is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is used on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768.
Overall dimensions: with stand 804x641x290 mm, without stand 804x579x116 mm.
TV mass: with stand: 20 kg, without stand: 16 kg.
Attention! The LC320W01 (SL) (A1) panel of the SHARP LC-32P50E LCD TV is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!