IBM 4247

Table 10. MAP 0140: Printhead Drive (continued)
Step Questions/Actions Yes No
7.
Disconnect the 26-conductor printhead
cable from the logic board (see
“Chapter 4. Locations” on page 265).
See “Printhead Cable Wiring” on
page 258 to measure the resistance of
pin 5 end-to-end and pin 6 end-to-end
(these pins are the same for both an
18-wire and a 9-wire printhead).
Is the resistance 5 ohms or less for
both pins?
Re-install the printhead. Carefully follow
the replacement procedure, “Printhead”
on page 356.
Install a new carriage motor. See
“Carriage Drive Motor Assembly” on
page 415.
-or-
Install a new logic board. For Model A00,
see “Logic Board - Model A00” on
page 370. For Models 001 and 002, see
“Logic Board - Models 001 and 002” on
page 378. Or “Logic Board - Model 003”
on page 366.
-or-
Install a new sensor cable (includes the
printhead home sensor). See “Sensor
Cable Assembly” on page 441.
Run T&D in automatic mode to verify
correct printer operation. For Model A00,
see “How To Run the Test and
Diagnostic (T&D) Programs” on
page 161. For Models 001, 002, or 003,
see “How To Run the Test and
Diagnostic (T&D) Programs” on
page 201.
Install new printhead cables.
Re-install the printhead. Carefully follow
the replacement procedure, “Printhead”
on page 356.
Run T&D in automatic mode to verify
correct printer operation. For Model
A00, see “How To Run the Test and
Diagnostic (T&D) Programs” on
page 161. For Models 001, 002, or 003,
see “How To Run the Test and
Diagnostic (T&D) Programs” on
page 201.
Chapter 1. Diagnosing Problems
74