WILLETT 430 - RS232 Jumper; Installation; Removal

Disassembly and Assembly: RS232 Jumper
Issue 2
139
Part No. 306-0430-102
RS232 Jumper
As the printer is not fitted with an external COMM1 port, the RS232 jumper assembly (Part No. 100-0370-158)
must be used to make a temporary connection to the CPU when downloading firmware to the printer.
Installation
1
Ensure that the printer is disconnected from the mains supply.
2
Screw in the two top cover fasteners to release the top cover catches and raise the top cover. The top cover
is held in the open position by support stays. Unscrew the two top cover fasteners - leave them captive, do
not remove.
3
When the top cover is in the open position, undo the six quick release side cover fasteners and remove the
side covers.
4
Connect one end of the jumper to the CON_232 connector on the CPU board (Figure 69 (
2
)).
5
Place the other end of the cable in a convenient position, making sure that there is no danger of it fouling
mechanical components or short circuiting electrical components. Switch on the printer.
6
Download the firmware (see
Using Microsoft Windows 95 or 98
, page 20 and 21).
Removal
1
After downloading the firmware, switch off the mains supply to the printer and the PC.
2
Disconnect the PC from the jumper.
3
Remove the jumper from the CON_232 connector (Figure 69 (
2
)) on the CPU board (
1
).
4
Refit the side covers to the printer and secure them with six quick release fasteners.
5
Lower the top cover.