Service manual

CPU Assembly Connectors
A-7
Table A-4 Control Board Connector J304 to Printhead Logic
Pin Signal Pin Signal
1 DATA_OUT 8 nSTROBE3
2 FSW_+5V 9 nSTROBE4
3 GROUND 10 PRCLK
4 THERMISTOR 11 unlatch
5 THERMISTOR 12 DATA
6 nSTROBE1 13 N.C.
7 nSTROBE2
Signal Definition
DATA Print data to printhead.
DATA_OUT Print data output from printhead.
FSW_+5V Filtered switched +5 volts.
nLATCH Printhead latch — latches a line of print data.
nSTROB1-nSTROBE4 Printhead strobe — enables the dot drivers.
PRCLK Printhead clock. Clocks serial data into printhead at 4 MHz.
THERMISTOR Voltage from printhead thermistor — indicates printhead temperature.