Printronix P4280 - PROMs and Chips on the Mechanism Driver

5–60 Replacement Procedures
PROMs and Chips on the Mechanism Driver (Figure 5–25 )
Removal
1. Prepare the printer for maintenance (page 5–3).
2. Remove the mechanism driver PCBA (page 5–48).
CAUTION
To prevent electrostatic damage to electronic components, wear a
properly grounded static wrist strap when handling PCBAs and
components.
3. Using a chip puller, remove the defective chip(s). Locations are shown
in Figure 5–25 .
Installation
CAUTION
To prevent electrostatic damage to electronic components, wear a
properly grounded static wrist strap when handling PCBAs and
components.
1. Using a chip installation tool, install chip(s). Locations are shown in
Figure 5–25 .
2. Install the mechanism driver PCBA (page 5–48).
3. If you changed DPU or font PROMs, adjust hammer phasing (page
4–6).
4. Return the printer to normal operation (page 5–86).