– 2.8 –
2-1-4. 1394 PCB
The 1394 (IEEE1394) PCB uses the SH2 (RISC, 28.7MHz) from Hitachi as the CPU and the
program stored in the flash memory in the CPU. Therefore, the 1394 CPU is upgraded by
downloading the program from the host computer. This PCB supports bi-directional printing.
2-1-5. I/F Connection PCB
This board connects the signals of the main PCB and 1394 PCB.
2-1-6. HDC-4Head PCB
This board is provided in the electrical equipment case. It receives signals from the main
PCB, generates the COM signal for driving heads 1 to 4, generates nozzle data, and transfers
each data to the slider PCB through the FPC cable. In addition, it is provided with the driver
circuit for the cooling fan and cutter and the read-out circuit for the paper-width sensor and
temperature sensor.
HDC PCB Connector signals
Connector Pin No. Signal Name Remarks
1 GND
2 SCK
3 GND
4SNLD1(2)
5D0
6D1
7D2
8D3
9D4
10 D5
11 D6
12 D7
13 GND
14 SDI1(2)
15 SDRQ1(2)
16 HNINTR1(2)
17 REJ1(3)
18 REJ2(4)
19 SUB1(3)
20 SUB2(4)
21 LE1(2)A
22 LE1(2)B
23 LE1(2)A-R
24 LE1(2)B-R
25 GND
26 40MSCK+
27 40MSCK-
28 GND
29 +3.3V
30 +3.3V
31 GND
32 GND
33 +5V
34 +5V
35 GND
36 +35V
37 +35V
38 +35V
39 +35V
40 +35V
Connector Pin No. Signal Name Remarks
1 GND
2 SOLCOM
3PAPER-CUT
4 GND
5 MARK2 Reserved (Tx)
6 MARK1 Reserved (Tx)
7T-LEDON
8 GND
9 LENCB1
10 LENCA1
11 KP-SEN
12 P-WID-SEN
13 GND
14 SLOP
15 ADI
16 GND
17 A4INH3
18 A4INH2
19 A4INH1
20 A4C
21 A4B
22 A4A
23 ASCK
24 ACS
25 GND
26 GND
27 +5V
28 +5V
29 +5V
30 GND
CN1
CN2
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