6. Inspect the printhead cable for damage and a poor connection at the printhead. Replace the cable, if
indicated.
Power On Check: Perform this check only after completing the “Power Off Check” on page 286.
Verify AFTA operation, using single-part forms
1. Power on (|) the printer.
2. Set the AFTA menu item to AFTA=0. This invokes the microcode to use the needle #5B, and invokes the AFTA
motor and the internal logic to detect the thickness of the forms that are positioned against the platen.
3. Load a single sheet of 20 lb (80 g/m
2
) paper. This paper is about 0.1 mm (0.004 in.) thick [occasionally, 20 lb
paper might measure as little as 0.09 mm (0.0038 in.) thick].
Note: If the printer displays a 55/055 AFTA ERROR, there may be a problem with printhead needle #5B (#5
on the Model 002). See T&D12 in “T&D12 - AFTA Calibrate Test” on page 171 for Model A00 or “T&D12
- AFTA Calibrate Test” on page 210 for Models 001, 002, and 003 to investigate the AFTA ERROR.
4. Verify that under AFTA motor control, the wheel turns clockwise to the full-open position (near the 9 to 10
mark) and counterclockwise to the full-close position (near the 0 to 2 mark).
5. Park and reload the forms a few times to verify that the wheel position is repeatable.
v
If the wheel does not rotate, power off (O) the printer and check the AFTA motor connections, the AFTA
motor, and the logic board.
v
If the printer displays the '55/055 AFTA ERROR' message, the AFTA #5B measurement needle is faulty.
Replace the printhead.
v
If the wheel does not move to the full-open position, then to the full-close position, power off (O) the printer
and check for binds in the AFTA mechanism.
v
When the wheel will move repeatedly to full-open and back to the same position, note for later use the
closed-position number (near the 0 to 2 mark). For later discussion, identify that number as 'A.'
Verify AFTA calibration using thicker or multiple-part forms
1. Park single-part forms.
2. Set the operator panel menu item AFTA=0.
Chapter 5. Removals and Adjustments
289
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 ...