b. Test: Slide a sheet of 1-part paper up past the carriage. Using the AFTA wheel, close to a very small gap.
The paper should be pinched by the carriage; it will NOT slide when pulled backwards. As you continue to
pull on the paper, begin to rotate the AFTA wheel in small increments to open the gap. Notice the wheel
position number where you can begin to pull the paper backwards. Close the gap again and repeat this a
few times until you agree on the wheel position number where paper begins to slide with constant friction.
This wheel position number is the minimum carriage to platen gap required for 1-part paper sliding.
c. Estimate A is defined by adding 0.5 to this paper sliding number.
5. Second, determine estimate B by finding the AFTA wheel position number that begins to give DARK printed
characters.
Note: To view the AFTA wheel as described in the following procedure, open the top cover and place a
magnet on the upper left corner of the operator panel to disable the cover interlock.
a. Setup: Install the front tractor, the bail assembly and a new or nearly new ribbon. Verify that the value in
T&D08 is set to 0 and SAVE.
b. Test: Print Samples on blank 1-part paper at settings of FIXED = 1, 2, 3 and 4. Record the actual wheel
position number along side the FIXED=X print sample. Use the TEST key and Printer Adjustments , Front
AFTA pattern.
c. Estimate B is defined as the wheel position number that is small enough to begin to make DARK printed
characters. Refer to the chart below. You should see the darkness of the characters change as the FIXED
value increases. If you get Example 1 or 2, use the wheel position where DARK begins and proceed to
step 6. If you get Example 3, change the T&D08 value from 0 to -4, to decrease the gap. Repeat the Print
Samples.
Table 21.
Character print quality and result
Menu setting
Wheel position #
Example 1
Example 2
Example 3
Fixed 1
A
DARK
DARK
LIGHT
Fixed 2
B
LIGHT
DARK
Very light
Fixed 3
C
Very light
DARK
Chapter 5. Removals, service checks and adjustments
151
Summary of Contents for 4247-V03
Page 24: ...Reference table 8 ribbon lift and 26 pin cable connectors 93 Chapter 1 Diagnosing problems 24 ...
Page 138: ...Operator panel cable wiring Chapter 3 Wiring diagrams 138 ...
Page 144: ...Tractor assembly cable wiring Chapter 3 Wiring diagrams 144 ...
Page 164: ...Chapter 5 Removals service checks and adjustments 164 ...
Page 173: ...Table 24 Print quality sample 1 2 3 Chapter 5 Removals service checks and adjustments 173 ...
Page 246: ...Assemblies Chapter 6 Parts catalog 246 ...
Page 307: ...Taiwanese EMC Notices 307 ...
Page 310: ...Index Copyright IBM Corp 2002 310 ...
Page 311: ...IBMR Part Number 75P1301 Printed in U S A G544 5873 00 1P P N 75P1301 ...