Specifications

5–46 Replacement Procedures
PCBA, Common Controller (Figure 5–20 )
CAUTION
To prevent electrostatic damage to electronic components, wear a
properly grounded static wrist strap when handling PCBAs.
Removal
1. Prepare the printer for maintenance (page 5–3).
2. Open the printer cover.
3. Remove the paper guide assembly (page 5–42).
4. Open the connector latches and disconnect the multi I/O ribbon cable (1)
from connector J1 (2).
5. Open the connector latches and disconnect the CCB/Mech. Driver cable
connector (3) from connector J2 (4).
6. Open the connector latches and disconnect the control panel ribbon
cable (5) from connector J3 (6).
7. Lift the ejection levers (7).
8. Grasp the common controller PCBA (8) by the ejection levers and pull it
up and out of the card cage (9).
9. Remove the program PROMs, font PROMs, memory paging PROM
(page 5–52), and host terminating resistors (page 5–56).
Installation
1. Install the program PROMs, font PROMs, memory paging PROM (page
5–52), and host terminating resistors (page 5–56) onto the replacement
PCBA.
2. Slide the common controller PCBA (8) down into the card cage (9).
Engage the card edge connectors in the connector at the bottom of the
card cage (9).
3. Lower the ejection levers (7) to the closed position.
4. Connect the control panel ribbon cable (5) to connector J3 (6).
5. Connect the CCB/Mech. Driver cable connector (3) to connector J2 (4).
6. Connect the multi I/O ribbon cable (1) to connector J1 (2).
7. Install the paper guide assembly (page 5–42).
8. If PROMs were replaced, adjust the hammer phasing (page 4–4).
9. Return the printer to normal operation (page 5–80).