IBM 4247-V03, Информация по обслуживанию

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2. Verify the smooth rotation of the wheel. Hand cycle the wheel clockwise (as viewed from that end of the
printer) to a higher value, until the mechanical stop is against the frame. This is the full-open gap position.
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The travel of this rotation should equal about 10 to 11 numbers on the wheel.
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The travel through the entire range must be smooth and free of any binding as you rotate the wheel to
full-open, then to the full-close position. If you feel any binding:
a. Check the AFTA intermediate gear (gray) and the wheel (white) for damaged teeth. Replace, if
necessary.
b. Ensure the AFTA motor is not pushed upward too much against the AFTA intermediate gear. Loosen
and retighten the AFTA motor screws. This will allow the AFTA motor to fall away from the AFTA
intermediate gear.
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Check the ends of the (large) carriage shaft for correct adjustment.
– If the carriage shaft is too tight, you will notice binding at the frame.
– If the carriage shaft is too loose, you will notice clicking at the frame when you grasp the carriage shaft
and attempt to move it up and down.
When you grasp and attempt to move it, the carriage shaft is correctly adjusted if it turns freely but does not
click at the frame. Ensure both screws that secure the carriage shaft retainer are tight.
To achieve the correct adjustment, loosen the 2 screws of the carriage shaft retainer to relieve the bind.
Bias the carriage shaft retainer toward the lower carriage shaft retainer screw (the 5 O’clock position), and
retighten the screws.
3. Verify the correct mounting of the platen.
a. Grasp and attempt to move up and down the left end of the platen.
b. If you hear a clicking where the bearing goes into the frame, loosen and tighten the bearing retainer-plate
screws, while biasing the retainer toward the lower screw (the 5 O’clock position).
c. Retighten the 2 screws, and verify there is no clicking when you grasp the carriage shaft and attempt to
move it up and down.
4. Verify the initial alignment of the wheel by following these steps:
a. Rotate the wheel to the full-open gap position.
Chapter 5. Removals, service checks and adjustments
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