Two cases of laser printer fault maintenance
Failure phenomenon One:
An HP HP LaserJet 1010 Laser printer used for a period of time, when online printing, the paper is normal, but print without handwriting.
Analysis and Maintenance:
We know that HP HP LaserJet 1010 Laser printer is currently a unique use of HP instantaneous fuser technology, up to ppm (A4, letter) printing speed, application of HP resolution enhancement (RET), resolution of up to DPI, monthly print load up to 5, 000 page, 8
In the WIN10 system This function is only not open, if you want to open we only need to follow the following methods to operate on it, specifically as follows.
1, click the Start menu, and then click "Settings";
2, in the Open Settings window click the "System" option to enter, the effect shown in the following figure;
3, then we then click on the "Notifications and actions" window in the "Choose what icon to display on the taskbar" as shown on the right;
4, and then se
and more frequently, finally to the computer cannot use the point, the customer only then took the computer to the company, requests the repair.
Troubleshooting:
1. Because at the beginning who also did not think will be the power problem, on the first soft after hard, the principle of the smallest system to exclude. Because it is irregular crash, the first suspect is a software problem, reload the system, but in the operation of the detection still occurs.
2. After troubleshooting the softw
How to view hardware information in Windows system with commands, how DOS commands to view hard disk and memory/cpu information? The most direct is: Start → run →cmd open a command prompt, under which you can enter systeminfo execution to see almost all the system information you want to know, even the installed network card and its IP on the machine.
Problem Description: How to view the number of memory strips on the motherboard from the system.Be
also hosted the management function. In general, the server board will be integrated with a variety of sensors, used to detect a variety of hardware devices on the server, at the same time with the corresponding management software, you can remotely detect the server, so that the network administrator on the server system for timely and effective management.
6, in memory support. Because the server has to adapt for a long time, high-throughput high-s
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First, the hardware pin description
The tiny6410 Development Board has 4 user programmable LEDs located on the core board directly connected to the CPU's gpio.
Led detailed resources occupy the following table:
LED4 LED3 LED2 LED1 GPIO GPK7 GPK6 GPK5 GPK4
Second, bare-metal program Description
The Tiny6410 uses the foll
1. Overall focus
It is usually not enough to observe the system energy, it is necessary to take account of the whole systems such as disk/controller, CPU, network usage.
2. Operating System Tools: Sar,vmstat,iostat, etc.
UNIX vendors offer a variety of system monitoring utilities, including ordinary command-line utilities such as Sar,vmstat,iostat, and many vendors provide graphical tools such as HP's Glanceplus.
These utilities should be used with great care, and they often report seemingly
Hardware problem is mainly the problem of heat dissipation, notebook because of the volume problem, cooling has been unsatisfactory, which is why the radiator prevalent reasons. Summer itself is high temperature, notebook heat can not go out, the CPU out of protection strategy, will reduce their power, causing the notebook to run very slowly. The main reason for the notebook cooling problem is 3 modules:
Hardware
The topic of this conversation is mainly related to the hardware system. For example, your program needs to support different types of CPUs (x86, SPARC, PowerPC), or CPUs of the same type of different word length (such as x86 and x86-64), and you need to be concerned about the hardware system.
★ The size of the base type
The size of the base type in C + + (the number of bytes occupied) varies with the len
Tags: mysql optimizer1 Server hardware optimizationWhen selecting a database server, you can consider the following aspects:1) CPU: Recommended for high-performance servers such as Dell R7, R8, or R9 series servers.2) Disk: The biggest constraint on the database server is disk I/O, if the condition can be used SSD, if the cost is limited can use the SAS hard disk, in terms of performance ssd>sas>sata. As for raid, you can use raid1+0, or RAID5 (consid
1. zedboard–connect A 2nd micro-usbcable between the host machine and connector J17 (JTAG)2. Set The Boot mode jumpers to cascaded JTAG mode3. Connect a MICRO-USB cable between the Windows Host machine and theusbuart:a. Zedboard connectorJ14 (UART) 4. Slide the Zedboard powerswitch to ON. You should see the green Power Good LED (Ld13light.s on after power on5. Use Device Manager to determine the COM port for the Usb-uart. Inwindows 7, clickStart à Control Panel, and Thenclick Device Manager. Cli
Tags: format ifconf-o DMI user CPU Information getconf graphical interface MeminfoSearch on the Internet for n long, found a good document, reproduced:1. View all hardware information for the machine:Dmidecode |moreDMESG |moreThe 2 commands are very informative, so it is recommended to use "|more" later for easy viewing2. View CPU InformationMethod One:CPU-related parameters in Linux are stored in the/proc/cpuinfo file.Cat/proc/cpuinfo |moreMethod Two
First, hardware information1, total number of cores = number of physical CPUs x number of cores per physical CPU # Total Logical CPUs = number of physical CPUs x number of cores per physical CPU X number of hyper-threads2. View the number of physical CPUscat/proc/cpuinfo| grep "Physical ID" | Sort| uniq| Wc-l3. View the number of cores in each physical CPU (that is, the number of nuclei)cat/proc/cpuinfo| grep "CPU Cores" | Uniq4. View CPU information
CCDImage DetectionII>
Author: 1.1 drops of beer INSTRUCTOR: Chen Zheng; Unit: whu
Ii. Hardware Design for black/white image detection
2.1Power supply.
Figure6:CCOfD12vPower Source
Because the battery voltage of the car is 7.2 V, and the working voltage of the CCD camera is 12 V, a Boost Circuit needs to be built using a chip, as shown in figure 6.
2.2Video signal field synchronization signal separation.
Figure7: Video signal
First, the maintenance judgment must start from the simplest thing
Simple things, on the one hand, refers to observation, on the other hand refers to the simple environment.
The simple thing is observation, which includes:
1, the environment surrounding the computer-location, power supply, connection, other equipment, temperature and humidity, etc.
2, the phenomenon displayed by computer, the content of display, and their similarities and differences with normal situation;
3, the internal enviro
For older users who use computers for longer periods of time, it is inevitable to friends or colleagues to help maintain and repair the computer, and sometimes to help people buy a PC, then we will certainly bring hardware testing software, but, who also can not always carry these software, if the right to do not have the appropriate testing software to do? You don't know anything about that, do you? So your master image will be greatly damaged, in fa
With the development of China's routing industry, the soft routing technology is constantly updated and upgraded. Here we mainly explain what is hardware traffic control and software traffic control, traffic control is used to prevent Frame loss when the port is blocked. This method is implemented by sending the blocked signal back to the source address when the sending or receiving buffer starts to overflow. The traffic control software can effective
Apple HomeKit How to affect the national intelligent hardware pattern
2014-06-23 15:48 Published system categories: Consumer Electronics Custom Classification: Default
Tags: smart home
Apple unveiled a series of heavyweight development frameworks, including home Kit,health Kit,cloud Kit, at the WWDC developer conference in June. Among them, the release of HomeKit to the current hot domestic and foreign smart home market has an important i
Perhaps because many administrators are unfamiliar with the router or understand the reasons for not in-depth, a large number of router hardware failures appear on the software, the following we mainly analyze several common router hardware failures. Router hardware failure is the problem we often encounter, here we mainly analyze the router
With the development of mobile internet in full swing, a large number of high-quality mobile end of the app, to provide users with a lot of valuable services. And the traditional hardware industry by this impact, began to consider the combination of soft and hard transformation, hardware began to become more and more soft, more and more intelligent, internet giants and traditional companies are looking for
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