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- From: leonard@qiclab.scn.rain.com (Leonard Erickson)
- Newsgroups: comp.sys.tandy
- Subject: Re: trs80 questions
- Message-ID: <1992Aug30.064245.8175@qiclab.scn.rain.com>
- Date: 30 Aug 92 06:42:45 GMT
- Article-I.D.: qiclab.1992Aug30.064245.8175
- References: <1992Aug25.060203.3677@mnemosyne.cs.du.edu>
- Reply-To: 70465.203@compuserve.com
- Organization: SCN Research/Qic Laboratories of Tigard, Oregon.
- Lines: 26
-
- mvlewis@nyx.cs.du.edu (Michael Lewis) writes:
-
- >I have a problem with the screen on my model 4. Imagine the sdcreen is a
- >conveyor belt. If you were to write on the conveyor belt, and turn the
- >wheels on the end, the print would wrap around the the back side of the
- >belt. The print on the back is backwards as seen from the front. This is
- >what is wrong with my machine. The upper left cornes of the print is
- >about 20 character shaces from the right of the screen, wraps behind the
- >screen and comes in on the left side. How do I go about fixing this. I
- >tried the adjusting screws on the screen controller board. They only
- >shifted the print over about anothr 40 characters, it also shifted the
- >model III screen away from normal. Model III mode seems fine but the
- >Model 4 screen is shifted. any help you can give is greatly appreciated.
-
- The "backwards" print is a giveaway. The horizantal centering is off.
- When it gets far enough off, the characters that have been shifted off
- the screen apparently reflect off of something inside the tube. That
- gives the "backwards" appearance. If you can't get the picture centered,
- that mean one of the components in the circuit is too far out of spec
- for the trimmer to compensate.
-
- --
- Leonard Erickson leonard@qiclab.scn.rain.com
- CIS: [70465,203] 70465.203@compuserve.com
- FIDO: 1:105/51 Leonard.Erickson@f51.n105.z1.fidonet.org
- (The CIS & Fido addresses are preferred)
-