Technical description and composition of the SHARP LC-42XD1E TV, type of panel and applicable modules. The composition of the modules.SHARP
Model: LC-42XD1E
Chassis / Version: KD915
Panel: 42 inch
T-CON: V420H1-C04
Inverter (backlight): VIT70023.70 rev2, VIT70023.71 rev2
PWM Inverter: OZ9928SN, LM339A
MOSFET Inverter: BE6G2X, BE6H5Z x4
Power Supply (PSU): RDENCA194WJQZ DPS-268AP
PWM Power: DLA001D, DAS001, L6562D (PFC), DAP011 (DAP11)
MOSFET Power: 15N60C3, FQA9N90C
MainBoard: KD915 KD915WE06
IC MainBoard: FRC9429A, MSP4410K, K4H561638H-UCB3, M29DW128F, VGC5969B, M29W160ET, 24LC64
Tuner: KD833
Control: GA538WJSA
SHARP
Model: LC-42XD1E
Panel: V420H1-L04
T-CON: V420H1-C04; EM638325TS-6G, AS19-HG, MAX1858
Inverter (backlight): Master VIT70023.70 rev2, Slave VIT70023.71 rev2
PWM Inverter: OZ9928SN
MOSFET Inverter: BE6G2X, BE6H5Z
Power Supply (PSU): RDENCA194WJQZ
PWM Power: DLA001D, DAS001, DAP011 (DAP11), L6562D (PFC)
MOSFET Power: 15N60C3, FQA9N90C, 2SK3568
MainBoard: KD915 KD915WE06 & AV: KD604WE
IC MainBoard: FRC9429A, MSP4410K, K4H561638H-UCB3, M29DW128F, VGC5969B, EPM240T100C5N, SIL9023CTU, 24LC256BWP, AK4363VF, KD628WE12, STI5516AUC, K4S641632, K4S641632
Tuner: KD833 Tuner 89222 064 (STV0360C)
Technical Specifications LC-42XD1RU
SHARP LC-42XD1E
General recommendations for repairing TV LCD
It is advisable to start repairing SHARP LC-42XD1E, like other TVs, by inspecting external and internal elements and modules. In some cases, visible external damage to the elements can suggest the direction of troubleshooting and localization of the defect even before the start of the necessary measurements at the control points of the nodes of electronic circuits. If charred resistors, swollen electrolytic or cermet capacitors, ring cracks in the soldered terminals of transformers or heating elements are detected, it is advisable to establish the causes and consequences of the malfunction that has arisen, as well as to check the connected elements and assemblies.
If the LC-42XD1E TV does not turn on, does not make any sounds when it is turned on, and also no indicators light up or blink on the front panel, there is a high probability of a malfunction in the power module. In some cases, there may be a malfunction only in standby power. It is advisable to start the troubleshooting of the power supply module by checking the state of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and transistors 15N60C3, FQA9N90C, 2SK3568, which are often found in such a state of breakdown.
In most cases, key breakdowns in switching power supplies (SMPS) do 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 DLA001D, DAS001, DAP11, L6562D from the manufacturer.
If there is no image when you turn on the SHARP LC-42XD1E, or it appears for a second and disappears completely, but there is sound, most likely either the backlight lamps or their power converter (inverter) are faulty. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the general power supply unit. It is necessary to take into account that in cases of inverter protection shutdown (in order to be able to diagnose) there is a risk of failure of the inverter power elements and take special care. After carrying out repairs, the protection circuit must be restored for further safe operation of the TV.
If the motherboard KD915WE06 & AV: KD604WE is faulty, first of all it is necessary to check all the linear stabilizers and power converters of its chips, and also, if necessary, update the software (software). Sometimes you can check the health of MB only by replacement. If it is not possible to replace the MB (SSB) card, it is necessary to check the health of its elements - FRC9429A, MSP4410K, K4H561638H-UCB3, M29DW128F, VGC5969B, EPM240T100C5N, SIL9023CTU, 24LC256BWP, AK4363VF, KD628W161212, KD628W1612, K436W46416UC12, K436W4326412UC, K436W4166412UC12, K436W4161641, 321.
Defective components should be replaced.
Before replacing the tuner KD833 Tuner 89222 064 (STV0360C), if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
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 with Schematic Diagram 98 pages 2006 on model LC-37XD1E, LC-37XD1RU, LC-42XD1E, LC-42XD1RU.
One of the typical defects of the SHARP LC-42XD1E TV can occur in the V420H1-L04 panel.
color distortion in the image as a negative, light tones predominate. Often in such cases, the AS19-HG gamma corrector is faulty. Another indicator of this malfunction is the excessively strong heating of the AS19-HG or the deformation of its body, which in practice makes it possible to do without measuring the gradation voltage of gray.
If replacing the AS19-HG does not solve the problem, similar symptoms can cause short circuits in the column drivers of the panel, which is usually indicated by noise in the form of even vertical stripes on the screen. The drivers are in loops and cannot be replaced, then it is necessary to replace the glass, or the entire panel assembly.
The appearance of the MainBoard KD915 is shown in the figure below:KD915
PSU Advanced
The power supply module RDENCA194WJQZ is installed in the LC-42XD1E TV using the PFC (Power Factor Correction) scheme acting as an active filter to eliminate the higher harmonic components of the current consumption. The step-up converter based on the L6562D PWM controller does not allow the input rectifier filter's electrolytic capacitor to be connected to the network directly through open diodes, when the value of the charge current determines its reactance (about 15-30 ohms at a frequency of 50 Hz). As a result of the conversion, the charging current of the capacitor will be determined in such a way that the envelope of the high-frequency pulses of the input current will repeat the phase and shape of the sine wave of the input voltage. The health check of the PFC unit is carried out by measuring the DC voltage on the capacitor of the rectifier network. In operating mode, it should be around 380V, in standby approximately 300V.
The appearance of the power supply
Main features of the SHARP LC-42XD1E device:
Installed matrix (LCD panel) V420H1-L04.
The matrix control uses the Timing Controller (T-CON) V420H1-C04 ;.
The Master inverter is used to power the backlight, controlled by the OZ9928SN PWM controller. As power elements of the inverter, keys of the type BE6G2X, BE6H5Z are used.
The necessary supply voltages for all nodes of the SHARP LC-42XD1E TV are generated by the RDENCA194WJQZ power supply module or its analogs using DLA001D, DAS001, DAP011 (DAP11), L6562D (PFC) microcircuits and power switches of the type 15N60C3, FQA9N90C, 2SK3568.
MainBoard - the main board (motherboard) is a KD915, FRC9429A, MSP4410K, K4H561638H-UCB3, M29DW128F, VGC5969B, EPM240T100C5N, SIL9023CTU, 24LC256BWP, AK4363VF, KD628WE12, STI5516AUC, K4S641632K-UC75, M29W160ET, 24LC64 .
KD833 Tuner 89222 064 (STV0360C), and KL models.
Tuner KD833 Tuner 89222 064 (STV0360C) provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CMO
Model: V420H1-L04
Type: a-Si TFT-LCD, Panel
Diagonal size: 42 inch
Resolution: 1920x1080, FHD
Display Mode: Super MVA, Normally Black, Transmissive
Active Area: 930.24x523.26 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit), CIE1931 75%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: 20 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 8-bit), 61 pins
Voltage: 12.0V
