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- 1084S Vertical Height Modification
- by Brian Lloyd
-
-
- Disclaimer: This document is just a simple hardware hack that can, but
- not guarantee, improve the quality of your monitor. I am not responsible
- if you nuke your machine or yourself while making modifications to your
- monitor. This modification is not supported by Commodore in any way shape
- or form to the best of my knowledge. I have included some safety tips
- and guidelines to help you along the way. By taking on this project puts
- all responsibilities on you, not me! This modification will not work on
- all monitors. Some 1084S's had it built in while others don't have it
- at all! Also, just in case anyone else has sent out instructions on a
- project to do the same thing, sorry if it is a repeat! The only thing
- it does is to instruct you in how to make your V-Height knob external.
-
-
- This project is CardWare!!!
-
- If you like it then send me a postcard!
-
- Note: You do not have to limit yourself with a postcard. I also will
- accept a shareware fee of US $5 or DM 8.50- in which you will
- recieve an AmigaGuide'd version with a bit more detail.
-
- In Europe: US Postal: In America:
- ----------------- ------------- -----------------
- Brian Lloyd Brian Lloyd Brian Lloyd
- 9-11 Hauptstrasse or Box 1208 or c/o Kenneth Lloyd
- 67688 Rodenbach APO AE 09180 Route 8, Box 8
- GERMANY USA USA
-
- NOTE: After 31 January 1995 I will no longer be able to be reached
- at the first two addresses. You will have to use the third. Sorry!
-
- If you have successfully modified your monitor then please contact me,
- or if you would like to contact me then please contact me.
- I would like to keep track of how many users out there actually have
- benefited from this project.
-
- About the Author:
- I am in the American Army (until April 1995) and the proud owner of
- an Amiga 1200 (3 1/2" internal 170 MB Hard Drive, 8 MB Fast Ram,
- 50 MHz 68882). I am also the current librarian of the Kaiserslautern
- Amiga Users' Group. I did this modification on my 1084S over a year
- ago and the monitor has worked like a charm ever since. I run my
- Amiga 1200 in PAL screen mode to take maximum advantage of the extra
- vertical height.
-
- Materials Required: Phillips Screwdriver
- Soldering Iron
- Silver Solder
- Solder Removing Braid
- 100K Ohm Variable Potentiometer
- Small Wire
- Wire Cutters
-
- -These may be purchased at any specialty electronic store
- like Radio Shack for just a meager few dollars. Do not
- start on this project until you have all the parts. It
- is not specific which Potentiometer style that you must
- use-that is up to you.
-
- Background: I got my first A500 and 1084S back in 1990 when I joined the
- American Army. I was the envy of everyone with their Tandy 1000's and
- IBM 8088 PC's. After a year or so I started buying software that was
- created in Europe. Some of the game screens were so large that it went
- beyond the normal overscan of my monitor, namely, Alien Breed. It got to
- be aggravating that I could not see my score or how many lives I had
- remaining. I looked on the back of my trusty 1084S and saw the V-Height
- knob. What luck! The problem was that I had to use a small flathead
- screwdriver in order to make adjustments. This 'worked' but I had to
- take my monitor out of my computer desk hutch to make changes. My NTSC
- machine needed to be PAL some days, NTSC on others. After a while my
- knob gave out and I was stuck with a screen that was about 50" tall on
- my 13" screen. This was the end so I opened up my monitor, found the
- problem and went shopping!
-
-
-
- Here is what to do:
-
- -Find some decent work space. You will also be taking
- several screws off your monitor so it would be a good
- idea to get a couple of small cups to keep track of
- them with.
-
- -Unplug your monitor. There is a wire in your monitor
- that can discharge 20,000+ volts if the monitor is in
- use. No joke! You want to live through this project.
-
- -(optional) Do not use your monitor for at least 24 hours.
- Some monitors can keep a charge within themselves and
- a shock is not what you are trying to achieve.
- For the record, I let mine sit overnight.
-
- -Remove the outer shell of your 1084S. There are two
- screws on the top and two on the bottom. A phillips
- screwdriver will do nicely.
-
- -Gently pull the monitor's front and back halves apart
- very slowly. Where the headphone jack is located
- on the side you will have to use a phillips to remove
- it. Note: The 1084S has several plastic knobs on the
- front and they may fall off. Just keep track of them
- as you will be putting them back on later.
-
- -On the back of the 1084S there are connectors for
- L-AUDIO IN, R-AUDIO IN, VIDEO IN, 9-PIN IN, etc...
- You must locate the screws that hold these mounts in
- place and remove them also.
-
- -By this point you should have the back half of the
- monitor shell completely removed. If not, then
- finish removing anything else that I may have missed.
- Put the shell beside the rest of the mess you just
- made.
-
- -At the bottom rear of the monitor you will notice a
- circuit board loaded with all sorts of components.
- The only one we are interested in is located at the
- very rear. It is a potentiometer (or variable
- resistor). It looks like a white plastic button
- that could be off of one of your shirts. Make sure
- you are looking at the right one. I should be
- labelled V_Height or something similar.
-
- -Take your soldering iron and the copper solder
- removing braid into your hands. Use about 1" of the
- braid and place it on the metal leads that are
- currently fastening the white knob onto the circuit
- board. Note: The leads may be either on top or
- on the bottom of the board depending on the version
- of the board.
-
- -Apply the soldering iron on top of the braid (gently)
- and it will start absorbing the solder off of the
- connectors. Note: Some more advanced users may have
- solder suckers, this works too. Don't apply the
- iron for more than TWO OR THREE SECONDS at a time.
- The excess heat may cause damage. If you need to
- repeat then do so until the knob is off. If you
- wish you may use the braid and clean up any mess.
-
- -Use the wire cutters and cut off the used soldering
- braid. Discard the used part.
-
- -You may either re-use (recycle) the small part or
- you can do what I was forced to do and replace it.
-
- -Figure out where you want your new knob to be
- located at. I wanted my knob to be external so
- I routed wire through the hole for the V-Knob
- and velcro-mounted the knob on the side of my
- 1084S. For the purpose of this project we will
- mount it somewhere on the rear-left of the
- 1084S so it will be accessible but out of sight.
-
- -Strip about 1/4" or less of plastic from your
- wire. You need three pieces that are about 8-12"
- each, both ends stripped.
-
- -The potentiometer was mounted by three leads on
- to the circuit board. I only used two leads but
- you may have to use three. Follow on...
-
- -Solder one wire to the middle lead on the circuit
- board. Solder one wire to the left one and one to
- the right one.
-
- -Now is the test phase. Do the same to the
- potentiometer but be sure to keep it oriented so
- the correct leads are connected to the right wire.
-
- -You can now CAREFULLY re-connect your monitor to
- your computer. Do not rebuild your monitor
- completely now.
-
- -If it worked for you then you should be able to
- modify the height of the screen to your liking
- by turning gently on the knob. If not you may
- try removing one of the outer leads (Don't forget
- to shut everything off!). This worked for me.
-
- -I then noted which one was not needed and cut it
- short, isolating it with some black electrical tape.
-
- -Remove the potentiometer by using the soldering
- braid. Run the two wires out of the V-Height hole
- on the monitor shell and proceed to re-solder it.
-
- -Test it again just to be sure. It it works then
- proceed.
-
- -Rebuild your monitor using the same process listed
- above but in reverse. (Don't forget to shut the
- 1084S off and unplug it first!)
-
- -Mount the potentiometer onto the outside of your
- 1084S somehow.
-
- -Finished!
-
-
- This project is CardWare!!!
-
- If you like it then send me a postcard!
- Note: You do not have to limit yourself with a postcard. I also will
- accept a shareware fee of US $5 or DM 8.50- in which you will
- recieve an AmigaGuide'd version with a bit more detail.
-
- In Europe: US Postal: In America:
- ----------------- ------------- -----------------
- Brian Lloyd Brian Lloyd Brian Lloyd
- 9-11 Hauptstrasse or Box 1208 or c/o Kenneth Lloyd
- 67688 Rodenbach APO AE 09180 Route 8, Box 8
- GERMANY USA USA
-
- NOTE: After 31 January 1995 I will no longer be able to be reached
- at the first two addresses. You will have to use the third. Sorry!
-
- If you have successfully modified your monitor then please contact me,
- or if you would like to contact me then please contact me.
- I would like to keep track of how many users out there actually have
- benefited from this project.
-
- I would like to thank the guys of SASG for their creation of the
- "Magic" series of software. I urge everyone to upgrade to MagicWB 2.
-
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