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Sharp MZ-80P4 Instruction Manual page 42

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~,:------------------------------------------------------------------------------------
...
\,
14
OV
15
NC
16
OV
17
FG
18
+5V
I~
- 30
GND
31
PRIME
32
FAULT
33
OV
34
IRT
35,36
NC
'(Note) Conditions for SELECT
• PULL UP at 3300
• Provide.d for twist pair cable.
• Printer reset signal (Negative logic)
(Note) IRT for terminal No.34 is also a printer reset
signal, but has an opposite logic. When one reset
signal is employed, the other signal shall be made
NC. Otherwise, trouble may be caused.
• Signal to indicate that the printer is in FAULT
state. (Negative logic)
• Conditions for FAULT
I)
PE
2)
DESELECT
• Printer reset signal.
• Refer to terminal No.31 PRIME.
(a) When the ON-LlNE/OFF-LlNE switch is pressed during DESELECT.
(b) When DC I code is received.
(c) When the ON-LlNE/OFF-LlNE switch is pressed in PE state, SELECT mode will emerge to cancel
PE and read I-line data. After printing, OFF-LINE mode will be resumed. (Override function)
Conditions for DESELECT
• When the ON/OFF LINE switch is pressed during SELECT.
• When "DC3" code is received.
• When PE occurs.
• When power is turned ON.
(This state can be altered by the operation of the internal function switch.)
39

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