Category Archives: Notes

Notes for A+ Exams

MOTHERBOARD

MOTHERBOARD Modern motherboards include, at a minimum: 1.  sockets (or slots) in which one or more microprocessors may be installed 2.  slots into which the system’s main memory is to be installed 3.  a chipset which forms an interface between … Continue reading

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OSCILLOSCOPE TUTORIAL

OSCILLOSCOPE TUTORIAL An oscilloscope, previously called an oscillograph, and informally known as a scope, CRO (for cathode-ray oscilloscope), or DSO (for the more modern digital storage oscilloscope), is a type of electronic test instrument that allows observation of constantly varying … Continue reading

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ISDN

ISDN is a circuit-switched telephone network system, which also provides access to packet switched networks, designed to allow digital transmission of voice and data over ordinary telephone copper wires, resulting in potentially better voice quality than an analog phone can … Continue reading

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COMPTIA EXAMS FOR COPIER TECHNICIANS….

COMPTIA EXAMS FOR COPIER TECHNICIANS…. Printing and Document Imaging or PDI+ is an entry-level, vendor-neutral certification proving competence in basic maintenance of printers, scanners, copiers and fax machines. The certification is recognized by several industry leaders, including Canon, Sharp and … Continue reading

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PSU

POWER SUPPLY A power supply unit (PSU) supplies direct current (DC) power to the other components in a computer. It converts general-purpose alternating current (AC) electric power from the mains (110 V to 120 V at 60 Hz [115 V … Continue reading

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DISPLAY CONNECTORS

DISPLAY CONNECTORS Display connectors are becoming quite confusing for me. I am from the vga connector generation but things have moved vastly beyond that. Lets get past semantics first… display connector can be referenced as monitor port, display adaptor, monitor … Continue reading

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