4. Inspect the carriage motor and pulley for wear, damage, binds, or looseness. Ensure that the 4 screws
and grommets that support the carriage motor are not damaged.* Verify that the cooling fan is
installed correctly.
To inspect the carriage motor, remove the printhead and loosen the belt clamp to free the belt. Move
the belt to rotate the motor pulley and the idler pulley. If the rotation indicates bearing damage,
replace the idler pulley or the carriage motor.
* The later version of screws has a yellow tinted finish; an upgrade Mechanical Parts Kit 9 is available
to replace screws and grommets, see “Assembly 10: Power Cords, Parts Kits, and Tools” on page 481.
Print Head
Home Sensor
Left
Ribbon
Bracket
Figure 88. Printhead Home Sensor. (Viewed From Top)
Chapter 5. Removals and Adjustments
334
Summary of Contents for 4247
Page 1: ...4247 Printers Maintenance Information Document Number SA24 4400 05 Part Number 27P8450 IBM ...
Page 241: ...e90apc15 Figure 24 Main Input Power Supply Ground Chapter 3 Circuit Diagrams 241 ...
Page 257: ...Figure 32 Stacker Motor Wiring Chapter 3 Circuit Diagrams 257 ...
Page 261: ...Stacker Cable Wiring Figure 36 Tractor Assembly Cable Wiring Chapter 3 Circuit Diagrams 261 ...