Fans; Fan B1 Removal And Replacement; Fan B2 Removal And Replacement; Tb2 And Line Filter - IBM 5256-1 Maintenance Information Manual

182
FANS
Fan B1 Removal and Replacement.
1. Power off.
2.
Remove the printer covers (110).
3.
Remove the platen and paper deflector (120).
4.
Disconnect the cables from A 1 A3 and A 1 A4
II.
5.
Remove card A 1 B3
II.
6. Remove the fan wires
fro~
TB3
II.
7. Remove the 2 screws
II. .
8. Slide the fan toward the front of the printer, tilt
the fan backward, and remove the fan through the
back of the printer.
9. Remove the fan from the bracket. When
reinstalling the fan, ensure the air flow di~ection
mark on the fan points toward the bracket.
10. Reinstall the fan by reversing this procedure.
Fan B2 Removal and Replacement
1.
2.
3.
4.
Power off.
Remove the printer back cover (2 screws).
Remove the fan wires from TB 1 on the
transformer
II.
Remove the fan
II.
When reinstalling the fan,
ensure that the air flow direction mark points away
from the bracket.
5. Reinstall the fan by reversing this procedure.
183
TB2 AND LINE FILTER
The line filter is not used on all machines.
TB2 Removal and Replacement
1.
2.
3.
4.
Power off.
Remove the printer back cover (110).
Remove the shield from TB2
II.
Remove the line cord wires from TB2 (phase A
from 2, and neutral from 1
III
(189).
1-60
5. Remove the 2 mounting screws and lift out TB2.
6.
7.
Move the remaining leads to the new terminal
block.
Complete the operation by reversing this
procedure.
Line Filter Removal and Replacement
1. Power off.
2. Remove the printer back cover (110).
3. Remove the
shi~ld
from the line filter
II.
4. Remove the line cord wires from the line filter
(phase A from A, neutral from B
II
(189).
5.· Remove the 2 mounting screws and lift out the
filter.
6. Move the remaining leads to the new filter.
7. Complete the operation by reversing this
procedure.