IJ4000 Impulse Jet
Appendix B: Theory of Operation
5765-018 Operations Manual Rev J
Page 69
Print Head
Test Points:
TP1:
LATCH; 5 volt logic signal. The column is printed on
the rising edge of the LATCH signal.
TP2:
CLOCK; 5 volt logic signal. Data is shifted into the
shift register on the falling edge of the CLOCK signal.
TP3:
DATA; 5 volt logic signal. Serial data input signal to
shift register.
LEDs:
LED1:
Green; indicates print head is requesting S
MART
-IDS
to turn liquid pump on.
LED2:
Green; indicates print head is requesting S
MART
-IDS
to turn vacuum pump on.
LED3:
Green; indicates print head reservoir is low and the
ink out timer has expired.
LED4:
Green; indicates high voltage is low.
LED5:
Green; indicates print head has reached its
operating temperature. The operating temperature
is set via a resistor in the print engine.
LED6:
Green; indicates print head is in stand-by mode.
Heater and high voltage are turned off.
LED7:
Green; indicates print head reservoir is full.
LED8:
Green; indicates intake valve is open.
LED9:
Yellow; indicates heater is on.
LED10:
Green; indicates return valve is open.
LED11:
Green; indicates purge valve is open
LED12:
(Not used.)
LED14:
Print head level indicators, Red-Green-Red.
Connectors:
J1:
Print head I/O connector.
J2:
Print engine connector.
J4:
Print head I/O connector (5765-560 board).
J4:
Programming port, for programming
microcontroller via a PC (5765-543 board).
J5:
Reservoir float switch connector.
J6:
Solenoid valve assembly connector.
J8:
(Not used.)