Commodore 1581 - Save With Replace Command

1581 ALIGNMENT/REPAIR TEST
VERSION 1.5.1
ALIGNMENT/REPAIR TEST OPTION FIVE - DRIVE MOTOR LOGIC
The Drive Motor Logic Test checks for proper operation of the Drive
Motor Control Logic by allowing the Drive Motor to be turned either
OFF or ON and displaying the current status.
Use a Scope or Meter to verify the Measured Signal with the Expected
Signal from the Drive Motor Control Logic Chart.
DRIVE MOTOR LOGIC OPTION MENU
* Press (1) - Turn Motor ON
* Press (0) - Turn Motor OFF
* Press RETURN - Return to Menu
Displays Alignment/Repair Main Menu
$------- - — - - = + +
| 1581 DRIVE MOTOR CONTROL LOGIC CHART |
$——----- 2 +—-------- +------- +- -- oot
DRIVE MOTOR CHECK IC EXPECTED | SCOPE | INCORRECT SIGNAL
DISPLAY PINS SIGNAL MODE PROBABLE FAILURE
+----------- +----—--------- 4+------—~—------ +- ---+ - ---- - +
OFF US - 4 HIGH DC U5 - Ull
OFF Ull - 2 HIGH DC Ull - BAD DRIVE
ON U5 - 4 LOW DC U5 - Ull
ON Ull - 2 LOW DC Ull - BAD DRIVE
+----------- +-------------- +-—---~— ~~~ ~~ + ------ - - - ----+
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