Instruction/ maintenance manual of the product 4+ Epson
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EPSON Equity 4+ power (SPEED) hard disk diskette power light access light drive button Memory bay for hard disk, diskette drive, CD-ROM, tape drive, or other option card slots ROM Video RAM Shadow RAM.
EPSON Equity 4+ Keyboard PS/2 compatible keyboard interface built into main system board; num lock setting selectable through SETUP; 6-pin, mini DIN connector Mouse PS/2 compatible mouse interface bui.
EPSON Equity 4+ Main System Board Diagram parallel port I serial port 2 serial port 1 mouse keyboard I 1 CN13 nnnnn / SUPPly connectors option card - riser board connector VGA feature connector video .
EPSON Equity 4+ Major Subassemblies Serial Port Connectors (CN9 and CN10) battery I CN3 diskette drive drive bays Connector Pin Assignments Parallel Port Connector (CNS) pin 13 pin 1 I I hooooooeoooL .
EPSON Equity 4+ VGA Feature Connector (CN14) pin 1 pin 25 ~oooooooooooow, pin 2 /’ ’ pin 26 VGA Feafwe Connector Pin Assignments ‘Active low togic DMA Assignments Hardware Interrupts System I/O .
EPSON Equity 4+ System Memory Map 23FFFFF 36MB Extended memory 0199909 1MB System BIOS (Shadow RAM, 64KB) OOFOCKKI OOEOOOO 99C7FFF Reserved for system BIOS (64KB) oocoooo 0088000 ooBoooo oOA9CUl9 oooo.
EPSON Equity 4+ Video Memory Hard Disk Drive Types If the computer has 512KB of video memory, you can install four 256K x 4 bit, 70ns, 20-pin DRAM ZIP (Zig-zag Inline Package) chips to increase the video memory to 1MB. The following table lists compatible DRAM ZIP chips.
EPSON Equity 4+ lnstallation / Support Tips Mouse and Keyboard Cl When connecting the mouse and keyboard to the computer, be careful to plug them into the proper ports. Although the ports are physically identical, they are not interchangeable, and damage may occur to the main system board if you plug the connectors into the wrong ports.
An important point after buying a device Epson 4+ (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Epson 4+ yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Epson 4+ - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Epson 4+ you will learn all the available features of the product, as well as information on its operation. The information that you get Epson 4+ will certainly help you make a decision on the purchase.
If you already are a holder of Epson 4+, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Epson 4+.
However, one of the most important roles played by the user manual is to help in solving problems with Epson 4+. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Epson 4+ along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
