IBM Infoprint 6500-v05, Maintenance Manual

Page: 338 / 544

Magnetic Pick-up (MPU) Assembly
338
Magnetic Pick-up (MPU) Assembly
Removal
1. Prepare the printer for maintenance (page 313).
2. Remove the ribbon. (Refer to the User’s Manual.)
3. Remove the shuttle cover (page 326).
4. Disconnect the shuttle cable assembly connector (page 409, Figure 43).
5. Disconnect the magnetic pick-up (MPU) cable connector (page 409, Figure 43).
6. Loosen the 7/64 inch hex MPU clamp screw (page 409, Figure 43).
7. Unscrew the MPU assembly from the MPU bracket.
Installation
1. Install the MPU assembly by screwing it into the MPU bracket (page 409, Figure 43).
NOTE: In the next step use the 1-30 inch-pound Torque Screwdriver, IBM part number 16F1661.
2. Using a feeler gauge, adjust the gap between the MPU assembly and the flywheel to 0.010 ± .001 inch (0.254 ± 0.025
mm). Torque the MPU clamp screw to 18 ± 2 inch-pounds (2.03 ± 0.23 N•m).
3. Check the gap between the MPU assembly and the flywheel with a feeler gauge:
a. If the gap is 0.010 ± .001 inch (0.254 ± 0.025 mm), go to step 4.
b. If the gap is not 0.010 ± 0.001 inch (0.254 ± 0.025 mm), loosen the MPU clamp screw and go back to step 2.
ATTENTION
Make sure the MPU cable is below the extension spring and does not touch the spring after the cable is connected.
4. Connect the magnetic pick-up (MPU) cable connector.
5. Connect the shuttle cable assembly connector (page 409, Figure 43).
6. Install the shuttle cover (page 326).
7. Install the ribbon. (Refer to the User’s Manual.)
8. Adjust the hammer phasing (page 381).
9. Return the printer to normal operation (page 314).