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8170 N/B MAINTENANCE
7.3 Debug Card
7.3.2 CIRCUIT:
PIO
CONNECTOR
LED
1
13
14
25
PIN 1 STB STROBE SIGNAL PIN 14 AFD AUTO LINE FEED
PIN 2-9 D0 - D7
P
ARALLEL PORT DATA BUS D0 TO D7 PIN15 ERR ERROR AT PRINTER
PIN10 ACK ACKNOWLEDGE HANDSHANK PIN16 INIT INITIATE OUTPUT
PIN11 BUSY BUSY SIGNAL PIN17 SLIN PRINTER SELECT
PIN12 PE PAPER END
PIN13 SLCT PRINTER SELECTED
PIN DEFINITION OF PIO PORT
PIN18-25
SIGNAL
GROUND