IBM 1483DSV manual Symptom/Action Chart, Symptom Recommended Action

Problem Determination and Maintenance

Symptom/Action Chart

Symptom	Recommended Action
	1. Ensure that the Power switch is switched on.
	2. Be sure the power cord is securely connected to the display
	station.
The Power–On indicator	Visually inspect the power cord for signs of damage.
stays off.	3. Be sure the power cord is plugged into an operational AC
	outlet.
	4. If the symptom persists, the Display/Logic element has
	probably failed.
The Audible Alarm	Switch off the display station power, then switch the power
continuously sounds (will not	back on. If the symptom persists, the Display/Logic element
shut off).	has probably failed.
3 appears in the	1. Refer to “Electronic Security Lock” on Page 4–18.
operator status row	2. If the symptom persists, the Display/Logic element has
(display screen blank).	probably failed.
The Control Unit Ready
symbol, (6, 4, , i, or S), does	Ensure that the coax cable is securely connected to both an
not appear in the operator	operational control unit and the display station.
status row.
The screen is completely	Adjust the Contrast and/or Brightness controls. If the screen still
	remains dark, replace the Display/Logic element. If the problem
dark and pressing the space
	recurs or your screen needs frequent contrast adjustments,
bar does nothing.
	replace the Display/Logic element.
The screen is not displaying	Adjust the vertical refresh rate (color displays) or the
correctly, or is flickering, or is
	mode/intensity setting (monochrome displays). See Page 4-2 for
receiving interference from
	instructions.
nearby devices
	If the screen exhibits any of the following problems
	1. Nothing displayed (no operator status row).
	2. Display area drifts horizontally or vertically.
	3. Characters fuzzy, out of focus.
	4. Display area is noticeably reduced or expanded.
The screen is distorted.	5. Display are is tilted.
	6. Abnormal sound or odor.
	7. Characters have extra or missing dots.
	Set the Power switch to Off ( O ). While holding down the space
	bar, set the Power switch to On ( ). Hold down the space bar
	until the Offline Test menu appears. If the menu does not display
	as described in Chapter 3, replace the Display/Logic element.
Monitor display problems	Set Dim Style to Status Row Only, Refer to “Dim Style” on
during Auto-screen cutoff.	Page 3-23.

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