HP LaserJet 4100 Series printer

AC/DC power distribution

In this circuit, the AC power input from the power receptacle is converted into DC power. The DC power is supplied to the loads.

The AC power is supplied to the low-voltage power-supply circuit in the engine controller board when the power switch (SW1) is turned on.

The AC power is converted into +24 VDC, +5 VDC, and +3.3 VDC in the circuit. The +24 VDC is supplied to the main motor, scanner motor, solenoids, clutches, and to the high-voltage power-supply circuit. The +5 VDC is supplied to the laser and formatter, while +3.3 VDC is supplied to the sensors and ICs on the engine controller board.

The +24 VDC is divided into +24 VA, which is constantly supplied from the low-voltage power supply circuit, and +24 VB, which is interrupted

when the interlock switch (SW101) is turned off by opening the top 3 cover. The +24 VB is supplied to the high-voltage power-supply circuit

on the engine controller board and relay (RL102). It also functions as a door-open detection signal (/DOPEN), so that the CPU detects an open door.

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HP LJ 2100TN, LJ 4000TN, LJ 2100M, LJ 1100AXI, LJ 1100SE, LJ 1100ASE HP LaserJet 4100 Series printer, AC/DC power distribution

LJ 2100, LJ 1100SE, LJ 1100A, LJ 4000TN, LJ 1100AXI specifications

The HP LaserJet series has long been recognized for its reliability and performance in the world of personal and office printing. Among its noteworthy models are the HP LaserJet 4000, LaserJet 2100TN, LaserJet 2100M, LaserJet 1100ASE, and LaserJet 1100AXI. Each model brings its own unique features, technologies, and characteristics that cater to various printing needs.

The HP LaserJet 4000 is a robust workhorse designed for medium to large office environments. It features a print speed of up to 20 pages per minute and a maximum print resolution of 1200 x 1200 dpi, ensuring crisp and clear text and graphics. Equipped with a 90 MHz processor and 8 MB of RAM, the 4000 can handle complex documents with ease. It supports HP’s built-in networking capabilities, allowing multiple users to share the printer effortlessly. Additionally, its versatility extends to various media sizes and types, making it suitable for diverse printing tasks.

The LaserJet 2100TN is another commendable model that offers both performance and value. With a print speed of 20 pages per minute and a resolution of 600 x 600 dpi, it’s an ideal choice for small to medium-size businesses. Its advanced HP Smart Printing technology increases its efficiency by optimizing print quality and minimizing paper wastage. The model comes with a 250-sheet tray and supports optional paper feeders, enhancing productivity for high-volume printing tasks.

The HP LaserJet 2100M features an intuitive design that emphasizes user-friendliness. It boasts the same print speed and resolution as the 2100TN but includes an additional 32 MB of RAM, allowing for enhanced processing power. The model supports direct printing from various devices, making it a versatile option for busy office environments.

The LaserJet 1100ASE and 1100AXI models are suited for smaller teams or home offices. Both models deliver reliable performance with print speeds of up to 10 pages per minute. The 1100ASE comes equipped with a parallel port for easy connectivity, while the 1100AXI includes USB support for modern devices. With a compact design, these printers fit perfectly in space-constrained environments without sacrificing print quality, with a maximum print resolution of 600 x 600 dpi.

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