Radio Shack TRS-80 DT-1 User Manual

UI'-l
Owner's Manual
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4/ Troubleshooting and Maintenance
Your Dr-l is a very reliable device which should provide you
wi th years of trouble-free service.
5elf-Test M.xie
The Dr-l has a self-Test which is turned on when you press
the key-cornbination of:
<ESC> <V>
If you are emulating the Hazeltine 141.0', the keys are
<CTRL><ESC><V> • When you press <ESC> <V>, you should see
every possible char acter the lJI'-1 can produce. If aIl
possible characters do not apPear, you may have a problem
wi th the character generator ROM or wi th the Video RAM. If
you suspect this is a problem, check wi th your· local Radio
Shack Computer center.
To turn the self-Test off, press <0>. Then press <CLEAR> or
<SHIFT><CLEAR> to clear the SCreen.
In case of Trouble •••
The f irst thing to do in case of trouble is to see if the
trouble is in the Dr-l or in the System.
Data leaving the Dr-l goes out on pin #2 and is recei ved on
pin #3 of the RS-232 channel. If pins #2 and #3 are
connected, the lJI'-1 will receive its own output. If
characters you type on the Keyboard are displayed on the
SCreen, the DT-l is very likely cçerating correctly and you
rray
look for problems sorrewhere else in the System.
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Radio Shack TRS-80 DT-1 Specifications

General

Brand	Radio Shack
Model	TRS-80 DT-1
Category	Desktop
Language	English