Performance Check/Adjustment; Performance Check - Tektronix 4010 Maintenance Manual

Section 4-4010 Maintenance
PERFORMANCE CHECK/ADJUSTMENT
PERFORMANCE CHECK
General. This procedure can be used under normal
operating conditions with all circuit cards installed. Since it
uses LOCAL operation, no computer connection is
required. Checks are referenced to a circuit and/or to a step
in the Adjustment Procedure to permit rapid evaluation of
incorrect results. In event of an improper response, recheck
the step with all optional and interface cards removed from
the pedestal to determine if the Terminal itself is at fault.
Steps requiring position measurement should be made
without parallax. That is, the line of sight should be
perpendicular to the viewing area; this can be achieved by
closing one eye and checking that the reflection of the
viewing eye is in line with the point being observed.
Activity Results Circuit/Adjustment
Turn the Terminal on
Indicator on left of keyboard glows Power Supply; Steps 1 and 2
Wait 30 seconds Face of display becomes bright Storage circuits; Step 6
Press PAGE Erase cycle occurs Storage circuits
Wait 5 seconds Alpha cursor appears in top-left of display, High Voltage and Z Axis circuits;
approximately 1.4 cm ±6 mm from left edge and 1.2 Deflection circuits; Terminal Control
cm ±6 mm from top edge of display area (TC) Circuits
Wait about 2 minutes Cursor disappears View/Hold circuits
Press SHIFT Cursor re-appears View/Hold circuits
Select LOCAL;
8s are written in line and remain stored on display Keyboard; Deflection circuits;
Enter ten 8s Character Generator; Storage circuits;
Step 6
Wait 5 minutes and Check for fade-positive and drop-out effects Storage circuits; Step 6
press SHIFT
Enter LINE FEED
With LF CAUSES CR option OUT, cursor moves TC
vertically to next line; with LF CAUSES CR option
IN, cursor moves to next line and to margin at left of
display
Enter 8s to complete a Cursor resets to next line and to margin at left of TC
line (74 characters) display
Press PAGE Erase cycle occurs; cursor goes home
Enter 34 LINE FEEDs Cursor goes to bottom-left corner of display
Enter 35th LINE FEED Cursor moves to margin 1 position at top-center of TC
display
Enter thirty-seven 8s 8s written and stored; cursor moves to next line and TC
back to margin 1
Enter 5 Space commands
Cursor moves 5 spaces to right TC
Enter RETURN
Cursor moves to margin at center of display TC
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