Preparing your HX for use

Before you use your HX-20 for the first time, you must take several steps:

2) Charge the batteries.

3) Put paper and a ribbon in the printer.

4) Adjust the LCD display.

5) Initialize memory and the calendar clock.

If you need to work with special symbols, you might also wish to select a different character set. See page 27.

Unpacking the HX-20

Remove the HX-20, the battery charger, and all packing materials from the box. Check the packing materials for small parts and papers.

DO NOT DISCARD THE PACKING MATERIALS! You will need them if you ever ship the HX-20, to protect it during shipment. You should have the following:

1) The Epson HX-20 computer and carrying case.

2) The battery charger.

3) A roll of paper for the printer.

3) A roll of paper for the printer.

4) A ribbon cartridge for the printer.

5) This manual.

6) The Epson HX-20 BASIC Tutorial and Reference Manual.

7) The registration card.

8) A warning sheet concerning the battery charger.

Fill out the registration card at the time of purchase and mail it to Epson.

With your registration card on file, Epson can provide continuing software and hardware support to help you in using your HX-20. Charging the batteries

The nickel-cadmium batteries in your HX-20 hold very little charge when they are new. So charge them now, before using the HX-20. A full charge is necessary to maintain maximum battery efficiency. For optimum battery life, only recharge the batteries when the HX-20 tells you to do so. Plug the battery charger into an AC outlet:

Uncoil the battery charger cable. At the free end of this cable is a small, cylindrical plug:

Insert this plug into the socket labelled "ADAPTER" on the back of the HX-20:

DO NOT TURN ON THE HX-20! If you leave your HX-20 power on, your batteries will not be fully charged at the end of eight hours.

The batteries in the HX-20 are now charging. Allow them to obtain a full charge for eight (8) hours. Then disconnect the battery charger from the AC outlet, and unplug it from the HX-20. Preparing the printer for use

The HX-20 features a built-in microprinter which can print text and graphics. The printer mechanism and controls are located in the upper left corner of the HX-20.

paper compartment printer- compartment printer on-off switch paper compartment printer- compartment printer on-off switch

When the HX-20 is shipped from the factory, the ribbon and paper are not installed in the printer. To prepare the printer for use, you must perform the following steps:

1) Remove the printer cover.

2) Insert the paper roll.

3) Insert the ribbon cartridge.

4) Replace the printer cover.

The only tools you will need are your fingers. Removing the printer cover

Four small grooves and the word "PUSH" are embossed on the printer cover. With the index finger of your left hand, push gently on these grooves:

The printer cover will tilt:

Using the thumb of your left hand, pull up on the printer cover:

When you have tilted the printer cover up to a near-vertical position, you may lift it completely from the HX-20:

Now you can look directly into the printer compartment. Inserting the paper roll

Note the ON-OFF switch on the right side of the HX-20. Turn the HX-20 on, by sliding this switch away from you, towards the back of the HX-20:

(Pay no attention to the screen at this point.) Turn the printer on, by sliding the PRINTER ON-OFF switch to the right:

The printer will remain inactive.

Now, with your thumb on the front of the paper cover, and your other fingers on the back, pull the paper cover up, rotating it towards the back of the HX-20:

(Unlike the printer cover, which is removable, the paper cover may not be removed from the HX-20.)

You may now look into the paper compartment, which is empty except for a strip of fabric.

Now you need the roll of printer paper that came with your HX-20. When you use it up, replace it with the same kind of paper (available at your Epson dealer). Do not use any other paper, as it may jam or otherwise damage the printer. Unroll several inches of this paper:

Slide the paper through the slot connecting the paper compartment and the printer compartment. You can slide it in about one-quarter inch before it stops:

While holding the paper in place, press the PAPER FEED button. The printer will activate, and a rubber roller will pull the paper into the printer compartment. Hold the PAPER FEED button down until the paper emerges from the top of the printer mechanism. When an inch of paper has emerged from the top of the printer, release the PAPER FEED button:

Now pull the paper through the printer, until several inches are exposed:

Put the roll of paper into the paper compartment on top of the strip of fabric. If you ever wish to remove the paper roll, lift the fabric strip.

Close the paper compartment by pulling the paper cover all the way forward. Be sure that you don't close the paper cover on the free end of the paper roll.

Inserting the ribbon cartridge

Packaged with your HX-20 is an L-shaped ink ribbon cartridge:

Holding it as shown, you may slide it over the paper and into the printer compartment. Be sure the paper goes between the ribbon cartridge and the ink ribbon.

Push the ribbon cartridge down into the printer compartment, until the top surface of the ribbon cartridge is level with the metal plate.

(Do not be concerned if the ribbon has some slack and rests on top of the metal plate.)

The ribbon cartridge is now installed.

(Eventually, the microprinter will produce very faint copy, and you will need to replace the ribbon. To remove a ribbon from your HX-20, press on the word "PUSH" embossed on the right side of the ribbon. The left side of the ribbon will pop up, and you can remove it. Then install a new one, which you may purchase at your Epson dealer.)

Note: If you get ribbon ink on the case of the HX-20, wipe it off immediately. Once it dries, it's hard to remove. Replacing the printer cover

Slide the paper through the slot in the printer cover:

Push the back of the printer cover down and into place:
Press the front of the printer cover down:

The printer cover is now in place. Adjusting the viewing angle

The HX-20 uses an LCD (Liquid Crystal Display) screen. Unlike a television or movie screen, an LCD screen can only be viewed from within a narrow range of angles. You can prove this to yourself by looking at the HX-20 screen and moving your head forward and backward, to view the screen from various angles:

At one angle you might not see any text at all on the screen. At another angle the entire screen may look black. But you will discover an optimal viewing angle: an angle from which you will find it very easy to read the screen.

Nevertheless, you won't have to sit in any particular position while using the HX-20. To adjust the LCD screen to your position, place your finger on the VIEW ANGLE adjustment knob, located on the right side of the HX-20:

Turn the VIEW ANGLE adjustment knob until the screen shows you crisp black characters against a light gray background.

(If you view the LCD screen from a different angle, you may need to adjust the viewing angle again. You might also have to adjust the VIEW ANGLE if the temperature changes, because the LCD display is temperature-sensitive.)

Initializing memory and the calendar clock

Before you use the HX-20 for the first time, you must initialize its memory and its calendar clock. (If your HX-20 is not on now, turn it on.) The screen will look like this:




(Note: there may be various letters and symbols under "1 MONITOR". Ignore them.)

If you can't read the text on your screen, adjust the VIEW ANGLE knob on the right side of the HX-20.

According to this menu, you must type system. To do so, hold down the |CTM-| key (located at the left edge of the keyboard) with one finger. While you are holding it down, press the n key.

You may now release both keys. The screen will display:

Press BREAK to abort

You have two choices now. You may initialize memory and the calendar clock, or you may decide that you don't wish to do so. Your choice will depend on how long you've been using the HX-20.

If your HX-20 is new, then of course you will want to initialize the system. But if you've been using the HX-20 for a while, and only pressed ctrl / @ by mistake while looking at the menu, then you will not want to initialize the system. To do so would cause the HX-20 to lose all programs and data you have already entered into its memory.

If you do not want to initialize the system now, press the red break key, or the menu | key, and the HX-20 will again display its menu. All programs and data previously entered into the HX-20 will still be in its memory.

If you do want to initialize the system, then you must now enter the date and time. This will set the HX-20's built-in calendar clock, enabling it to keep track of the date and time from this moment on, whether the HX-20 is turned on or not.

Figure 3-1 shows the particular form you must use to specify the date and time:

Figure 3-1 Format for Specifying Date and Time

You must enter iwo digits for each of these units of time. For example, let's say that you are reading this in the month of January. Even though it's the first month of the year, you may not specify the month with a "1". The HX-20 expects two digits, so you must enter "01" for the month.

The hour (HH) is based on a 24-hour clock. Thus, midnight is 00, noon is 12, and 9 PM is 21.

Let's say that it is now nine minutes and thirty-five seconds after two o'clock on the afternoon of January third, 1983. What numbers will you enter to specify the date and time?

The date is 1/3/83 = 010383

The time is 2:09:35 PM So you should type:



and press the hetui»| key. Press break or menu and you will at any time before pressing abort the initialization process.

Note that no spaces, slashes, or colons separate the numbers representing month, day, year, hour, minute, and second. The numbers just run together. So you must be very careful entering them. If you make a mistake entering the date or time, press the key or [ ctrl |/| h | . The screen will clear and you may start over.

When you have typed in the date and time and pressed the WETURW1 key, the HX-20 will set its calendar clock appropriately. Then it will clear all programs and data from its memory. When it has done so, it will display the menu again. Now the menu will look like this:




Your HX-20 is now ready for use. Selecting a different character set

Please note: The following information is for dealer reference only! The circuit cover should be removed only by an authorized Epson dealer or service center. Removing it yourself will void your warranty. You may select special character sets by using HX-20 software; see The HX-20 BASIC Tutorial and Reference Manual.

The HX-20 can display and print special characters required by users in a number of different countries. (See Table 3-1.)

TABLE 3-1 International Character Sets










Hex A code \











































































.v n
















To use any non-USA character set, touch a grounded surface such as a cold water pipe and then remove the circuitry cover on the bottom of the HX-20.

You will see a shiny, flexible flap. Carefully lift this up and out of the way.

One component, called a DIP switch, looks like this (enlarged to show detail):

DIY Battery Repair

DIY Battery Repair

You can now recondition your old batteries at home and bring them back to 100 percent of their working condition. This guide will enable you to revive All NiCd batteries regardless of brand and battery volt. It will give you the required information on how to re-energize and revive your NiCd batteries through the RVD process, charging method and charging guidelines.

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