Controller Pcba (Printed Circuit Board Assembly) - Printronix SLPA7000 User Manual

Chapter 6
Removal And Replacement Procedures

Controller PCBA (Printed Circuit Board Assembly)

Removal
1. Prepare the printer for maintenance (page 223).
2. Remove the access panels (page 226).
CAUTION
To prevent electrostatic damage to electronic components, always wear
a properly grounded static wrist strap when you handle circuit boards.
3. Put on a static wrist strap and ground it to an unpainted part of the printer
frame. Touch the frame with the hand wearing the wrist strap.
4. Remove the NIC assembly, if one is installed in the printer (page 244).
5. Remove the dual NIC wireless interface, if one is installed in the printer
(page 361.)
6. Unplug the RFID encoder power and data cables, if an encoder is
installed in the printer. (Figure 88, page 377).
7. Remove the socket head screw on each side of the power switch.
(Figure 45, page 264, item 2.)
8. Loosen the two slotted thumbscrews securing the power supply to the
base of the frame and pull the power supply one inch away from the
controller board.
9. Unplug all cable assemblies from the controller PCBA. (See the Cable
Routing diagram on page 337.)
10. Remove the J15 (page 237) and J21 (page 241) connectors.
11. Remove the two screws that attach the controller PCBA to the rear panel.
(Figure 51, page 282, item 7.)
12. Loosen the six captive screws enough to release the controller PCBA
from the printer frame. (Figure 51, page 282, items 2 and 20.)
CAUTION
In the next step, failure to completely remove the old thermal pad and
install the new thermal pad will damage the controller PCBA.
13. Remove the old controller PCBA and thermal pad from the printer frame.
(Figure 51, page 282, item 8.) Install the new thermal pad on the frame.
14. If you are replacing the controller PCBA with a new or rebuilt one, remove
the Flash SIMM and DRAM SIMM from the old board, and install them on
the new or rebuilt controller PCBA (page 239).
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