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).
Summary of Contents for P4280
Page 1: ...P4280 Line Matrix Printer Maintenance Manual R ...
Page 2: ......
Page 3: ...P4280 Line Matrix Printer Maintenance Manual R P N 155064 001 Rev B ...
Page 236: ...A 22 Configuring the Printer ...
Page 246: ...C 2 Torque Table ...
Page 263: ...D 17 Wire Data Cable No Part No Description W7 150649 001 Cable Assembly AC Ground PIN 1 ...
Page 296: ...8 Index Notes ...
Page 297: ......