emachines e17t4w tft lcd problems factory

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19” LCD Color Monitor Emachine E19T5W 2. DVI-D connector Pin No. Description Pin No. Description TMDS data 2－ TMDS data 2＋ Hot Plug Detect TMDS data 0－ TMDS data 2/4 Shield TMDS data 0＋ TMDS data 0/5 Shield DDC Clock DDC Data Analog Vertical Sync TMDS Clock Shield...

19” LCD Color Monitor Emachine E19T5W 1) MCU initialize. 2) Is the EPROM blank? 3) Program the EPROM by default values. 4) Get the PWM value of brightness from EPROM. 5) Is the power key pressed? 6) Clear all global flags. 7) Are the AUTO and SELECT keys pressed? 8) Enter factory mode.

19" LCD Color Monitor Emachine E19T5W SOT-223 U701 VCTRL +3V3 NC/LT1117-18 R702 　 1/10W C701 C703 C704 VCC1.8 NC/0.1uF NC/100uF/16V NC/0.1uF C702 VCC1.8 4.7uF/16V D701 BL_ADJ(DC) FTD7 FTD8 FTD9 0V ~ 3.3V 4.7K FD Mark FD Mark FD Mark LL4148 0V ~ 5V 4.7K 4.7K...

19" LCD Color Monitor Emachine E19T5W CN405 　 1/10W FB410 RED+ R434 　 1/10W C432 0.047uF RED- 　 1/10W FB411 GREEN+ R435 1/10W C433 0.047uF 　 GREEN- 1/10W 　 FB412 BLUE+ R436 1/10W C434 0.047uF 　 BLUE- PC5V R437 　 1/10W C435 0.047uF PC5V...

19" LCD Color Monitor Emachine E19T5W VDVI VMPLL VPLL AVDD VDDP VDDC VCC1.8 VDDC FB401 VCC3.3 AVDD FB402 VCC1.8 600 OHM VCC3.3 600 OHM C403 C407 4.7uF/16V 0.1uF VCC3.3 C404 C405 C406 C402 VCTRL VCTRL 0.1uF 0.1uF 0.1uF 0.1uF NC/LVACKP/NC RIN0P NC/LVACKM/NC GNDR...

19" LCD Color Monitor Emachine E19T5W PA[0..9] PA[0..9] CN101 LVACKP LVACKM LVB0M RXO0- RXO0+ LVB0P LVA2P LVB1M RXO1- RXO1+ LVB1P LVA2M LVB2M RXO2- RXO2+ LVB2P LVA1P LVBCKM RXOC- RXOC+ LVBCKP LVA1M LVB3M RXO3- RXO3+ LVB3P LVA0P LVA0M RXE0- RXE0+ LVA0P LVA0M LVA3P LVA1M...

19" LCD Color Monitor Emachine E19T5W CN801 PT801 POWER X"FMR R843 +12V CONN C816 R801 12pF/3KV 1/8W CN802 　 1/4W 　 2200+- R802 R804 R805 270K 1/4W 　 1/4W R818 R819 　 1/4W 　 1/4W 　 1/4W C811 C817 Q802 470uF/25V 2pF/3KV CONN...

19" LCD Color Monitor Emachine E19T5W (2). No Picture No picture Measure U702 PIN2=3.3V D701 (-)=1.8V Replace U702, D701, D702, Q702 X401 oscillate waveforms are normal Replace X401 Check if the sync signal from computer is output and video cable is connected normally Input the sync signal of computer, or change...

19" LCD Color Monitor Emachine E19T5W (3). White screen White screen Measure Q706 base X401 oscillate is high level? waveform is normal Replace X401 Check Q706, Q704 is broken or CN101 solder? Check reset circuit of U401 is normal Check Correspondent Check Correspondent component.

19" LCD Color Monitor Emachine E19T5W 8.2.2 Power/Inverter Board (1) No power Check CN902 pin5, 6 = 12V Check AC line volt 110V or 220V Check AC input Check the voltage of C905 (+) Check bridge rectified circuit and F901 circuit Check start voltage for the pin3 of IC901 Check R909, R910 and Change IC901 Check the auxiliary voltage is bigger than...

19" LCD Color Monitor Emachine E19T5W (2) W / LED, No Backlight Check CN902 pin5, 6 = 12V Check adapter or MB Check ON/OFF signal Check Interface board Check IC801 pin2=5V Change Q802 or Q803 Check IC801 PIN1/15 have the output of square wave at short Check IC801 PIN5/6 Check Q805, Q806 PIN5, 8= 12V Check Q805, Q806...

19" LCD Color Monitor Emachine E19T5W 8.2.3 Keypad Board OSD is unstable or not working Connect Key Pad Board Is Key Pad Board connecting normally? Replace Button Switch Is Button Switch normally? Replace Key Pad Board Is Key Pad Board normally? Check Main Board...

19" LCD Color Monitor Emachine E19T5W Emachine W19 Item Part No. for TPV Description A34G0126 PCB1B 30 BEZEL 033G6363 1 C POWER LENS A33G0089 TL 1L CONTROL BUTTON A15G0101 1 BASE PLATE A15G0096 2 MAIN FRAME A34G0125 TL 1B REAR COVER 037G6045 3 HINGE Q23G3155915...

19" LCD Color Monitor Emachine E19T5W Q40G0001915 2A CARTON LABEL Q40G000291510A 9005138 CC LABEL Q40G000291511A 9005989 SPEC LABEL Q40G000291512A 9005854 POP LABEL Q40G000291513A 9004325 LABEL Q41G780091538A QSG(8511516) Q41G9002915 2A MANUAL (8511515) Q44G9037 1 EPS(L) Q44G9037 2 EPS(R) Q44G9037 3EPE Q44G9037915 2A CARTON Q52G6025 13 36 MYLAR...

19" LCD Color Monitor Emachine E19T5W CN101 033G3802 4H WAFER 4P RIGHT ANGLE SW101 077G 605 1 CJ TSAB-2 DP101 081G 12 7 GP 715G1707 1 2 KEY BOARD PCB CN804 033G8021 2E U WAFER CN803 033G8021 2E U WAFER CN802 033G8021 2E U WAFER...

19" LCD Color Monitor Emachine E19T5W C909 067G215V471 4R LOW E.S.R 470UF +/-20% 25V C911 067G215V471 4R LOW E.S.R 470UF +/-20% 25V C905 067G215Y10115K ELCAP 105℃ 100UF M 450V C905 067G305R10115H ELCAP 105℃ 100UF M 450V L902 073G 174 65 H LINE FILTER L902 073G 174 65 LS...

19" LCD Color Monitor Emachine E19T5W Q702 057G 417 17 T PZT2907A Q704 057G 763 1 A03401 SOT23 BY AOS(A1) R721 061G0603000 RST CHIPR 0 OHM +-5% 1/10W R706 061G0603000 RST CHIPR 0 OHM +-5% 1/10W R705 061G0603000 RST CHIPR 0 OHM +-5% 1/10W FB412 061G0603000 RST CHIPR 0 OHM +-5% 1/10W...

19" LCD Color Monitor Emachine E19T5W R446 061G0603102 RST CHIP 1K 1/10W 5% R729 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R452 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R451 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R450 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R444 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W...

19" LCD Color Monitor Emachine E19T5W R482 061G0603472 RST CHIPR 4.7KOHM +-5% 1/10W R423 061G0603472 RST CHIPR 4.7KOHM +-5% 1/10W R422 061G0603472 RST CHIPR 4.7KOHM +-5% 1/10W R702 061G0603510 RST CHIPR 51 OHM +-5% 1/10W R723 061G0603513 RST CHIPR 51 KOHM +-5% 1/10W R434 061G0603560 RST CHIPR 56 OHM +-5% 1/10W...

19" LCD Color Monitor Emachine E19T5W C405 065G0603104 32 CHIP 0.1UF 50V X7R C406 065G0603104 32 CHIP 0.1UF 50V X7R C407 065G0603104 32 CHIP 0.1UF 50V X7R C414 065G0603104 32 CHIP 0.1UF 50V X7R C413 065G0603104 32 CHIP 0.1UF 50V X7R C412 065G0603104 32 CHIP 0.1UF 50V X7R...

19" LCD Color Monitor Emachine E19T5W D702 093G 6432P LL4148 D404 093G 6433P BAV99 D403 093G 6433P BAV99 D405 093G 6433P BAV99 D417 093G 6433P BAV99 D418 093G 6433P BAV99 D419 093G 6433P BAV99 D420 093G 6433P BAV99 D421 093G 6433P BAV99 D422 093G 6433P...

19" LCD Color Monitor Emachine E19T5W R842 061G0805000 0 OHM 1/10W R913 061G0805100 3F RST CHIPR 100KOHM +-1% 1/8W R923 061G0805102 CHIP 1KOHM 1/10W R924 061G0805102 CHIP 1KOHM 1/10W R926 061G0805102 CHIP 1KOHM 1/10W R841 061G0805102 CHIP 1KOHM 1/10W R843 061G0805102 CHIP 1KOHM 1/10W R812...

19" LCD Color Monitor Emachine E19T5W R813 061G1206105 1M 1206 R911 061G1206151 RST CHIPR 150 OHM +-5% 1/4W R816 061G1206155 RST CHIPR 1.5 MOHM +-5% 1/4W R826 061G1206201 RST CHIPR 200 OHM +-5% 1/4W R807 061G1206220 RST CHIPR 22 OHM +-5% 1/4W R818 061G1206220 RST CHIPR 22 OHM +-5% 1/4W...

19" LCD Color Monitor Emachine E19T5W D803 093G 64 42 P BAV70 SOT-23 D804 093G 6433P BAV99 D802 093G 6433P BAV99 ZD904 093G 39GA26 T ZENER DIODE RLZ5.1B SEMTECH ZD902 093G 39S 17 T RLZ12B LLDS ZD903 093G 39S 19 T PTZ7.5B ZD801 093G 39S 24 T...

19" LCD Color Monitor Emachine E19T5W D426 093G 39147SEM ZMM5V6ST D401 093G 39147SEM ZMM5V6ST D402 093G 39147SEM ZMM5V6ST D701 093G 6432V LL4148-GSO8 D702 093G 6432V LL4148-GSO8 C903 063G 10747410V 0.47UF 275VAC ARCO 0M1T1730 8120 SCREW Q90G0117 1 HEAT SINK 0M1T1730 8120 SCREW Q90G0118 1 HEAT SINK...

19" LCD Color Monitor Emachine E19T5W D410 093G 39147SEM ZMM5V6ST D411 093G 39147SEM ZMM5V6ST D412 093G 39147SEM ZMM5V6ST D414 093G 39147SEM ZMM5V6ST D415 093G 39147SEM ZMM5V6ST D416 093G 39147SEM ZMM5V6ST D425 093G 39147SEM ZMM5V6ST D426 093G 39147SEM ZMM5V6ST D401 093G 39147SEM ZMM5V6ST D402 093G 39147SEM...

19" LCD Color Monitor Emachine E19T5W CN406 088G 35424F N DVI 24PIN Q706 057G 417 6 PMBS3906/PHILIPS-SMT(06) R501 061G0603222 RST CHIPR 2.2 KOHM +-5% 1/10W C502 065G0603104 12 CER2 0603 X7R 16V 100N P D406 093G 39147SEM ZMM5V6ST D408 093G 39147SEM ZMM5V6ST D409 093G 39147SEM...

There’re more than 300 procedures to produce TFT LCD. The most advanced LCD, in which the array and cell process are highly automatic. Technically, every step in the process can lead to defects, and most of the defects have been eliminated through the development of TFT LCD technology.

For the first two situations, that’s because the circuit on the TFT and CF controlling that defective pixel point is shorted or broken. While the third situation is caused by damaged color pixel.

Usually, assembly of cell and IC is under heat and should be positioned accurately. Problems with IC connection will be checked out very soon, followed by the adjustment on machine parameter.

In LCD, newton’s rings may occur on screen when two glass substrate haven’t been sealed well, so that one of the glass may form a convex lens and lead to light interference.

According to real LCD manufacturing conditions, the number of normal LCD panels exceeds greatly the number of defective LCD panels. Therefore, the normal PRs greatly outnumber the defective PRs. As a result, the collected data set for training would be imbalanced if a two-class classification approach is adopted, the SVM by Vapnik [4] for example, the class imbalance problem occurs.

Previously, several workshops/special issues have been held/published to discuss and address this problem [12–15]. Various approaches for imbalanced learning have also been proposed, such as sampling (e.g., [16–18]), integration of sampling with ensemble learning (e.g., [19,20]), cost-sensitive learning (e.g., [21–23]), and SVM-based approach (e.g., [24–28]). These discrimination-based (two-class) approaches have shown to be useful in dealing with class imbalance problems. In addition, several works have also suggested that a one-class learning approach can provide a viable alternative to the discrimination-based approaches [29–33]. Interested readers can refer to [34] for a broad overview on the state-of-the-art methods in the field of imbalanced learning.

In practice, in addition to the class imbalance problem, the LCD defect detection also suffers from another critical problem resulting from the absence of negative information. To facilitate the following problem description, the normal PR class and the defective PR class are defined as the positive class and negative class, respectively.

The main difference between a normal PR and a defective PR is that their appearances are apparently different, as can be observed from Figure 4. The color (or gray level) of a normal PR is nearly uniform, implying that the variation of the gray-level distribution of normal PRs is very small. On the contrary, the surfaces of defective PR not only contain various kinds of textures, but also vary greatly in color, implying that the variation of the true distribution for negative class in the data space is very large. Collecting a set of positive training data that can represent the true distribution of positive class is easy, because: (1) the variation of positive-class distribution is very small; and (2) most of the LCD panels are normal (the number of normal PRs is considerably large). Therefore, the positive class can be well-sampled during the data collection stage in real practice. However, representative defective PRs are difficult to obtain in practice for several reasons. For example, there are numerous types of defects in array process, more than 10 types at least. However, not all the defects would occur frequently. Some of the defects seldom appear, for example the defect caused by abnormal photo-resist coating (APRC). The defect “APRC” seldom occurs, because equipment/process engineers maintain the coating machines periodically. Even so, the coating machines might still break down occasionally. As a result, the number of available images containing the APRC defects is quite limited. But, the APRC defect has a large variation in color and texture. Unfortunately, limited APRC examples cannot stand for all kinds of APRC defects. Therefore, the collected negative training data are most likely under-sampled. Here, the “under-sampled” means that the collected negative training set cannot represent the true negative-class distribution in the data space, which is the problem of absence of negative information. Due to this problem, numerous false positive (i.e., missing defects) will be produced if a two-class classification approach (e.g., a binary SVM) is applied to the LCD defect detection, which has been evidenced by the results reported in [7]. Compared with two-class classification approach, novelty detection approach is a better choice.

Novelty detection is one-class classification [10,35], which is to solve the conventional two-class classification problems where one of the two classes is under-sampled, or only the data of one single class can be available for training [5,6,9–11,35–40]. As analyzed above, for the LCD defect detection application, the normal PRs can be well-sampled, while the defective PRs are in general undersampled. Therefore, the LCD defect detection can be treated as a typical novelty detection problem. Accordingly, one-class classification is a better solution.

To summarize, it can be seen that the LCD defect detection suffers from two problems simultaneously: one is the class imbalance problem, and the other is the problem of the absence of negative information. For the first problem, there have been many sophisticated solutions, including sampling, cost-sensitive learning, SVM-based, and one-class learning approaches. However, the only solution to the second problem is the novelty detection approach (i.e., one-class classification approach). Therefore, one-class classification would be a more appropriate approach to the LCD defect detection application.

There are several approaches for one-class classification, such as density approach (e.g., Gaussian mixture model [5]), boundary approach (e.g., SVDD [9] and one-class SVM [40]), neural network approach [6,36], and reconstruction-based approach (e.g., the kernel principal component analysis for novelty detection [35]). It has been proven in [9] that when a Gaussian kernel is used, the SVDD proposed by Tax and Duin [9] is identical to the one-class SVM proposed by Schölkopf et al. [40]. This paper focuses on the SVDD since it has been applied to the same application in the works of [7] and [10], and has shown to be effective in detecting defective PRs. However, as discussed in Section 1, generalization performance of SVDD is limited. Therefore, the intent of this paper is on proposing a method to improve generalization performance of SVDD, and applying the improved SVDD to the LCD defect detection treated as a novelty detection problem. The improved SVDD is called quasiconformal kernel SVDD (QK-SVDD). Note that the QK-SVDD and SVDD are not two independent classifiers. To obtain QK-SVDD, one has to train an SVDD first, which will be introduced in Section 2.4. In the following part of the paper, we first introduce the defect detection scheme, and then derive the proposed method in details.

Description: Screen Size: 20" - Screen Type: TFT LCD - Resolution: 1600x900 - Contrast Ratio: 12,000,000:1 - Viewing Angle: 170* - I/O Interfaces: D-Sub, RGB - Enclosure Color: Black - Weight (lb): 9.20

Description: Screen Size: 17" - Screen Type: TFT LCD - Screen Enhancements: Active-Matrix - Resolution: 1366x768 - Aspect Ratio: 16:10 - I/O Interfaces: VGA

A thin-film-transistor liquid-crystal display (TFT LCD) is a variant of a liquid-crystal display that uses thin-film-transistor technologyactive matrix LCD, in contrast to passive matrix LCDs or simple, direct-driven (i.e. with segments directly connected to electronics outside the LCD) LCDs with a few segments.

In February 1957, John Wallmark of RCA filed a patent for a thin film MOSFET. Paul K. Weimer, also of RCA implemented Wallmark"s ideas and developed the thin-film transistor (TFT) in 1962, a type of MOSFET distinct from the standard bulk MOSFET. It was made with thin films of cadmium selenide and cadmium sulfide. The idea of a TFT-based liquid-crystal display (LCD) was conceived by Bernard Lechner of RCA Laboratories in 1968. In 1971, Lechner, F. J. Marlowe, E. O. Nester and J. Tults demonstrated a 2-by-18 matrix display driven by a hybrid circuit using the dynamic scattering mode of LCDs.T. Peter Brody, J. A. Asars and G. D. Dixon at Westinghouse Research Laboratories developed a CdSe (cadmium selenide) TFT, which they used to demonstrate the first CdSe thin-film-transistor liquid-crystal display (TFT LCD).active-matrix liquid-crystal display (AM LCD) using CdSe TFTs in 1974, and then Brody coined the term "active matrix" in 1975.high-resolution and high-quality electronic visual display devices use TFT-based active matrix displays.

The circuit layout process of a TFT-LCD is very similar to that of semiconductor products. However, rather than fabricating the transistors from silicon, that is formed into a crystalline silicon wafer, they are made from a thin film of amorphous silicon that is deposited on a glass panel. The silicon layer for TFT-LCDs is typically deposited using the PECVD process.

Polycrystalline silicon is sometimes used in displays requiring higher TFT performance. Examples include small high-resolution displays such as those found in projectors or viewfinders. Amorphous silicon-based TFTs are by far the most common, due to their lower production cost, whereas polycrystalline silicon TFTs are more costly and much more difficult to produce.

The twisted nematic display is one of the oldest and frequently cheapest kind of LCD display technologies available. TN displays benefit from fast pixel response times and less smearing than other LCD display technology, but suffer from poor color reproduction and limited viewing angles, especially in the vertical direction. Colors will shift, potentially to the point of completely inverting, when viewed at an angle that is not perpendicular to the display. Modern, high end consumer products have developed methods to overcome the technology"s shortcomings, such as RTC (Response Time Compensation / Overdrive) technologies. Modern TN displays can look significantly better than older TN displays from decades earlier, but overall TN has inferior viewing angles and poor color in comparison to other technology.

The transmittance of a pixel of an LCD panel typically does not change linearly with the applied voltage,sRGB standard for computer monitors requires a specific nonlinear dependence of the amount of emitted light as a function of the RGB value.

Less expensive PVA panels often use dithering and FRC, whereas super-PVA (S-PVA) panels all use at least 8 bits per color component and do not use color simulation methods.BRAVIA LCD TVs offer 10-bit and xvYCC color support, for example, the Bravia X4500 series. S-PVA also offers fast response times using modern RTC technologies.

TFT dual-transistor pixel or cell technology is a reflective-display technology for use in very-low-power-consumption applications such as electronic shelf labels (ESL), digital watches, or metering. DTP involves adding a secondary transistor gate in the single TFT cell to maintain the display of a pixel during a period of 1s without loss of image or without degrading the TFT transistors over time. By slowing the refresh rate of the standard frequency from 60 Hz to 1 Hz, DTP claims to increase the power efficiency by multiple orders of magnitude.

Due to the very high cost of building TFT factories, there are few major OEM panel vendors for large display panels. The glass panel suppliers are as follows:

External consumer display devices like a TFT LCD feature one or more analog VGA, DVI, HDMI, or DisplayPort interface, with many featuring a selection of these interfaces. Inside external display devices there is a controller board that will convert the video signal using color mapping and image scaling usually employing the discrete cosine transform (DCT) in order to convert any video source like CVBS, VGA, DVI, HDMI, etc. into digital RGB at the native resolution of the display panel. In a laptop the graphics chip will directly produce a signal suitable for connection to the built-in TFT display. A control mechanism for the backlight is usually included on the same controller board.

The low level interface of STN, DSTN, or TFT display panels use either single ended TTL 5 V signal for older displays or TTL 3.3 V for slightly newer displays that transmits the pixel clock, horizontal sync, vertical sync, digital red, digital green, digital blue in parallel. Some models (for example the AT070TN92) also feature input/display enable, horizontal scan direction and vertical scan direction signals.

New and large (>15") TFT displays often use LVDS signaling that transmits the same contents as the parallel interface (Hsync, Vsync, RGB) but will put control and RGB bits into a number of serial transmission lines synchronized to a clock whose rate is equal to the pixel rate. LVDS transmits seven bits per clock per data line, with six bits being data and one bit used to signal if the other six bits need to be inverted in order to maintain DC balance. Low-cost TFT displays often have three data lines and therefore only directly support 18 bits per pixel. Upscale displays have four or five data lines to support 24 bits per pixel (truecolor) or 30 bits per pixel respectively. Panel manufacturers are slowly replacing LVDS with Internal DisplayPort and Embedded DisplayPort, which allow sixfold reduction of the number of differential pairs.

Kawamoto, H. (2012). "The Inventors of TFT Active-Matrix LCD Receive the 2011 IEEE Nishizawa Medal". Journal of Display Technology. 8 (1): 3–4. Bibcode:2012JDisT...8....3K. doi:10.1109/JDT.2011.2177740. ISSN 1551-319X.

K. H. Lee; H. Y. Kim; K. H. Park; S. J. Jang; I. C. Park & J. Y. Lee (June 2006). "A Novel Outdoor Readability of Portable TFT-LCD with AFFS Technology". SID Symposium Digest of Technical Papers. AIP. 37 (1): 1079–82. doi:10.1889/1.2433159. S2CID 129569963.

Super Mobile HR TFT LCDs provide brilliant, vivid images outdoors where it is bright, but their visibility is poor indoors, where ambient light levels are lower.

Thus, though the display panel is transflective, it provides high transmittance and excellent image quality on a par with conventional transmissive TFT-LCDs.

The High Transmission Advanced TFT-LCD is suitable for applications where indoor use is of primary importance but outdoor use is occasionally necessary.