open. If the rollers are not open, run T&D11 in single test mode.
For Model A00, see “How To Run the Test and Diagnostic (T&D) Programs” on page 161.
For Models 001, 002, and 003, see “How To Run the Test and Diagnostic (T&D) Programs” on page 201.
1. Install a tractor assembly in the rear push position and install fanfold forms in the tractors. See Figure 81 on
page 328.
2. Press the Path key to select the rear push forms path.
3. Press Load/Form Feed key and observe the following:
a. The carriage will move past the normal left margin.
b. The bellcrank, the mechanism that rotates the platen gear toward the platen, is driven by the carriage.
c. The platen gear is engaged with the pinch roller gear.
d. The paper feed motor turns the platen gear and the pinch roller gear until the pinch rollers are closed
(raised), and the rollers touch the platen.
e. The carriage moves to the right allowing the bellcrank to move away from the platen and platen gear to
return to the left or home position.
f. The paper feeds forward 1 form.
g. Ensure the gear, washer, spring, and retaining clip are present.
h. Press the Load/Form Feed key again to verify that the rollers restore to open (not touching the platen).
i. To repeat this service check, press the Park key twice, and go to step 3.
e90atd1
Figure 77. Platen Pinch Roller Gear. (Viewed From Left Side)
Chapter 5. Removals and Adjustments
324
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 ...