3M SST, Manual

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SST Transport and Burster Mechanism Manual 75-0302-1450-8, Version 1 Ch. 6 Performing Field Repairs • 59
Replacing the Breakout Board
Note: The SST/HP-1 Transport also contains a breakout board. These boards are not
interchangeable. The Transport will not function properly if the wrong breakout board is
installed.
The Breakout Board provides additional connectors for the CPU Board. It also houses the control
lines for the solenoid-driven print linkage as well as the hole punch. You can replace the Breakout
Board by completing the following steps:
1. Open the cabinet of the device in which the SST/HP-4 Transport resides.
2. Back out any tickets, if applicable, from the SST/HP-4 Transport by using the green but-
ton on the CPU Board.
3. Disconnect the power to the SST/HP-4 Transport.
Warning! Disconnect power before removing the SST/HP-4 Transport. If you do not dis-
connect power, you may damage the unit or severe personal injury may occur.
4. Remove the SST/HP-4 Transport. Close the cabinet.
Note: Do not carry the SST/HP-4 Transport by the Print Head. Carrying it by the Print Head may
bend the bracket and cause printing problems. Always carry the SST/HP-4 Transport from
the bottom.
5. Unplug the 50-pin cable that connects the PCB-4 Board to the 50-pin connector J3 on the
Breakout Board.
6. Remove the 26-pin keyed cable that runs from the Print Head to the 26-pin connector J2
on the Breakout Board.
Figure 6.7
Breakout Board Connectors
Breakout Board
CPU Board
26-pin Connector
J2
50-pin Connector J3
20-pin Connector
J4
50-pin Plug J1 (on
the underside)