SWTPC ASCII, Руководство пользователя

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5
In Case of Problems
The tests called for in the check-out procedure are designed to warn you
of problems before they can cause damage. If any abnormal results are obtained
during the tests, or if there is obvious overheating of any part discontinue use
until the problem is located and corrected. Experience has shown that most
problems are caused by minor wiring, component installation and soldering
technique errors which can be prevented by careful assembly.
If you do have problems with your keyboard there are several tests you can
perform which may help you locate the problem. You will need an ohmmeter, an
oscilloscope, and a DC voltmeter for these tests. First go back and check once
more for proper component installation and for solder bridges or cold solder
joints. Also be sure that the correct jumpers are in place. Next check each
keyswitch with an ohmmeter to be sure none are shorted. If you have an
oscilloscope apply power to the keyboard and check for a 50 KHz signal on pin 40
of IC-1. If you obtain no signal check for 5 volts on pin 1, -12 on pin 18 and
ground on pin 17.
Repair Procedure
Repairs will be made on a basic rate charge plus parts. The basic rate for
the KBD-5 is $10.00. If you must return your KBD-5 please send the $10.00-in the
form of a money order or cashiers check along with the keyboard. When repairs
are finished the keyboard will be returned to you COD for parts charges, if any.
Do Not send personal checks for repair work.
Pack all parts to be returned carefully and insure. We will not accept
delivery on any parcels that arrive in damaged condition. Make check or money
order payable to Southwest Technical Products Corporation.