IBM 4247 Maintenance Information page 73

Table 10. MAP 0140: Printhead Drive (continued)
Step Questions/Actions
An open printhead thermal sensor can
6.
cause the printhead drive to stop.
Remove the printhead. See "Printhead"
on page 356.
For Model A00, 001 and 003, see
"18-Wire Printhead Wiring (Models A00,
001, and 003)" on page 242 or for Model
002 see "9-Wire Printhead Wiring (Model
002)" on page 244 to measure the
resistance of the thermal sensor.
Measure between pins 5 and 6 on the
printhead 26-pin connector (these pins
are the same for both an 18-wire and a
9-wire printhead).
Is the resistance 1000 ohms ±6% (60
ohms)?
Yes
Go to step 7 on page 74.
No
Install a new 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
73