WILLETT 430, Service Manual

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430 Ink Jet Printer Service and Maintenance Manual
60
Issue 2
Part No. 306-0430-102
CON_S ( 4 ) is a high speed synchronous port.
Pin No. Signal Function Pin No. Signal Function
1 TXD Asynchronous transmit
output 5 SDATA Synchronous data
2 RXD Asynchronous receive input 6 SDEN0 Synchronous enable 0
3 0 V Asynchronous data common 7 SDEN1 Synchronous enable 1
4 SCLK Synchronous clock 8 0 V Synchronous common
Table 6 CPU CON_S RID Synchronous Port
CON_P ( 5 ) is an interboard connector which connects the CPU board to the I/O board.
Pin No. Signal Function Pin No. Signal Function
1 to 4 0 V Common in out from PSU
(via I/O) 11 and
12 - 15 V - 15 V input from PSU
(via I/O)
5 to 8 +5 V +5 V input from PSU
(via I/O) 13 and
14 GND via I/O
9 and 10 +15 V +15 V input from PSU (via
I/O)
Table 7 CPU CON_P Power Input Connector
CON_D ( 6 ) is an interboard connector which connects the CPU board to the I/O board
Pin No. Signal Function
1 to 8 00 - 07 Droplet charge data
9 and 10 0 V Common
11 to 20 - Not used at present
Table 8 CPU CON_D Charge Data To I/O
CON_L ( 7 ) is connected to the LCD
Pin No. Signal Function Pin No. Signal Function
1 GND Ground 8 Ia1 Control bus bit 7
2 0 V 9 - Not connected
3 VCC +5 V 10 RESET LCD controller reset
4 CONTRAST LCD contrast 11 to 18 ad0 to ad7 Data lines
5 WR Write 19 0 V Font Select
6 RD Read 20 sel5 Select inverse video
7 lcd ce LCD chip enable
Table 9 CPU CON_L LCD Interface