Paper-Out Detection And Form Override Function; Error Conditions; Buzzer Operation - Epson LQ-1170 Service Manual

1.6.3 Paper-Out Detection and Form Override Function

The paper-out detector is attached to the printer mechanism. When the paper-out detector senses a
paper end, the printer first performs a form override. If paper loading fails, the BUSY signal goes HIGH,
the PAPER OUT indicator light comes on, the interface PE signal becomes HIGH, the \ERROR signal
becomes LOW, and the printer enters the PAUSE condition.
The form override function ignores the paper out and allows the printer to print additional lines after
a paper out is detected. After you load paper and press the PAUSE button, the printer returns to the
RUNNING condition and printing begins again.
The printer enters the paper-out state only when a paper out is detected after the printer performs a
paper loading operation,

1.6.4 Error Conditions

If any of the following error conditions are detected, the printer automatically enters the PAUSE
condition.
The home position is not detected at printer mechanism initialization.
The home position is detected during printing.
. The PAUSE button is pressed and the printer enters the PAUSE condition.
A paper out is detected after the printer performs a paper loading operation.
If the parallel interface is selected, the following interface signals are output to indicate the error and
to stop data transmission:
The BUSY signal becomes HIGH.
. The /ERROR signal becomes LOW.
No /ACKNLG pulse is sent.

1.6.5 Buzzer Operation

The buzzer sounds under the following conditions:
A paper-out error is detected. (The buzzer beeps three times for 0.1 seconds, with 0.1 second
interval s.)
Abnormal carriage movement is detected. (The buzzer beeps five times for 0.5 seconds, with 0.5
second intervals.)
. A control panel setting is accepted. (The buzzer produces one O. l-second beep.)
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