Laser printer cartridge and Toner Cartridge structures

Most brands of laser printer cartridges and powder box structure is integrated, and this part of the problem of laser printer parts most likely to understand its structure is very good for our maintenance.

1, imaging features some of the components

Photosensitive drum: is made of aluminum tube coated with selenium, the selenium material for the insulator in the dark, exposed site of the conductor. When the laser beam emitted by them came to light, to light the information matrix of dots to form a electrostatic latent image.

Drum drive gear: with the photosensitive drum at one end is fixed by the printer delivered impetus for drum rotation, while driving transfer roller rotation.

LCD Troubleshooting Maintenance

1, PANEL (LCD)
2, A / D Driver Board;
3, LCD screen line-drive
4, high-pressure plate (also known as step-up board, high-pressure section, INVERTER)
5, high-pressure plate wire 5, high-pressure plate wire
6, Power adapter (external, generally DC 3A/12V), are also part of the display of the open
Off the power section is built into the machine, the direct input AC220V to Off the power section is built into the machine, the direct input AC220V to
7, VGA cable
8, shell

The following is based on the maintenance of our daily summary of some of the maintenance ideas:

Learn Basic UNIX commands

Basic UNIX commands
Note: not all of these are actually part of UNIX itself, and you may not find them on all UNIX machines. But they can all be used on turing in essentially the same way, by typing the command and hitting return. Note that some of these commands are different on non-Solaris machines -
If you've made a typo, the easiest thing to do is hit CTRL-u to cancel the whole line. But you can also edit the command line
UNIX is case-sensitive.
Files
• ls --- lists your files
ls -l --- lists your files in 'long format', which contains lots of useful information, e.g. the exact size of the file, who owns the file and who has the right to look at it, and when it was last modified.
ls -a --- lists all files, including the ones whose filenames begin in a dot, which you do not always want to see.
There are many more options, for example to list files by size, by date, recursively etc.

Power On Self Test Beep Codes for a specific meaning

BIOS for the Award BIOS's a short: the system start normally. BIOS for the Award BIOS's a short: the system start normally. Congratulations, your machine without any problem. Congratulations, your machine without any problem.
2 Short: General error, please enter CMOS Setup, reset the incorrect option. 2 Short: General error, please enter CMOS Setup, reset the incorrect option.

What is CMOS?

BIOS is stored in CMOS memory, CMOS is a complementary metal-oxide semiconductor initials of the first to write Chinese is a complementary metal-oxide semiconductor, which is a semiconductor technology that will become the right of the metal-oxide semiconductor field-effect transistor (MOSFET) integrated on a silicon chip. BIOS is stored in CMOS memory, CMOS is a complementary metal-oxide semiconductor initials of the first to write Chinese is a complementary metal-oxide semiconductor, which is a semiconductor technology that will become the right of the metal-oxide semiconductor field-effect transistor (MOSFET) integrated on a silicon chip.

Diode characteristics and applications

In almost all electronic circuits, it is necessary to use semiconductor diode, which in many circuits play an important role, it is the birth of one of the first semiconductor device, its applications are very extensive.

Diode Diode works works

Crystal diode as a p-type semiconductor and n-type semiconductor pn junction formed in its interface on both sides of the formation of space charge layer, and built self-built electric field. Crystal diode as a p-type semiconductor and n-type semiconductor pn junction formed in its interface on both sides of the formation of space charge layer,

In-depth understanding of the hard disk structure

Opened an in-depth understanding of the hard disk data recovery must be preceded by the overall physical structure of the hard disk have a full understanding. As a high precision parts, hard disk external structure is relatively simple, the real high-tech body in its internal disk. As a high precision parts, hard disk external structure is relatively simple, the real high-tech content in its body within the disc.
1. The external structure of the hard disk 1. The external structure of the hard disk
Hard drive external structure is not complicated, mainly by the power supply interface, data interface, the control circuit board composition. Hard drive external structure is not complicated, mainly by the power supply interface, data interface, the control circuit board composition. For IDE hard drives, Serial-ATA hard drive, SCSI For IDE hard drives, Serial-ATA hard drive, SCSI

CPU fan noise removal method

The most important tool as a computer cooling fan, but also because the use of high frequency, resulting in noise is increasing. Faced with this situation, you thought the noise eradicated there? Faced with this situation, you thought the noise eradicated there? Perhaps you will say the fan is not on the line of direct replacement, but in fact as long as the fans do not bad, there is no need to replace with new, old fans as long as proper maintenance, can be returned to normal. Perhaps you will say the fan is not on the line of direct replacement, but in fact as long as the fans do not bad,

Method of hard disk damage repair

1, hard disk damage test, if there part of the sector on the hard disk can not be properly read or write or visit the situation, the general was known as a bad fan (bad sector), which is commonly known as "bad sectors . "hard disk bad sectors is very complex, and some recorded in the sector by the checksum code, sector identification, address information, which do not normally lead to logical errors. Hard disk bad sector the situation is very complex, and some recorded in the sector by the checksum code, sector identification, address information, which do not normally lead to logical errors.

windows crashes, blue screen error code meaning of the whole solution of

Computer Blue Screen
0 0x0000 job is completed. 0 0x0000 job is completed.
1 0x0001 Incorrect function. 1 0x0001 Incorrect function.
2 0x0002 system can not find the file specified. 2 0x0002 system can not find the file specified.
3 0x0003 system can not find the path specified. 3 0x0003 system can not find the path specified.
4 0x0004 system can not open the file. 4 0x0004 system can not open the file.
5 0x0005 Access is denied. 5 0x0005 Access is denied.
6 0x0006 invalid code. 6 0x0006 invalid code.
7 0x0007 storage control block has been destroyed. 7 0x0007 storage control block has been destroyed.
8 0x0008 storage space, unable to process this command. 8 0x0008 storage space, unable to process this command.

SDRAM memory repair method

An SD memory maintenance practices, use multimeter measuring method of memory chips

On the motherboard and memory data pins is 64, D0-D63, in order to protect the memory data bit feet, in the D0-D63 which 64 data bits plus feet with a small resistance resistor (10 EU) threshold flow effect. On the motherboard and memory data pins is 64, D0-D63, in order to protect the memory data bit feet, in the D0-D63 which 64 data bits plus feet with a small resistance resistor (10 EU) threshold flow effect. While the test Instrument The main principle is to repeat tests with the program memory chips of each data bit pin to see if there is no breakdown or short circuit pin data bits, there is a chip's clock pin, the address pins.