Chapter 4: 7401-4xxx Hardware Installation 4-15
Using the Printer Test and Display Panel
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READY
POWER
PAPER ATTN
ERR
F3 F2 F1 F 0
FORM
FEED LINE
FEED TEST SELECT

Display LED Indicators

The LEDs provide the following status informatio n :
PAPER/POWER (green)
Status Indication
Printer OK Very short Off blink every 14 seconds
DC power On or Flashing when power is on
Paper supply Rapid On-Off 50% cycle flashing when out of
paper
Paper low Rapid On-Off 50% cycle flashing when paper low
Diagnostic mode 10 % On and 90% Off when in diagn ost ic m o de
READY (green)
Status Indication
System ready On = System ready to accept data Off = Not ready
Data flow During receipt of data, LED blinks following sta t e
of the Busy signal
Reverse channel When not printing during IEEE-1284 reverse
channel status, LED blinks after PtrBus signal flow