IBM 4247 Maintenance Information page 39

Table 4. MAP 0120: Attachment, Model A00 (continued)
Step Questions/Actions
Install the RS-232C loop-back connector.
4.
Run T&D9 in Single Test Mode to test the serial
attachment circuits. See "How To Run the Test and
Diagnostic (T&D) Programs" on page 161 for Model
A00. For Model 003, see "How To Run the Test and
Diagnostic (T&D) Programs" on page 201.
Did T&D09 run without errors?
Install the loop-back connector on the host end of the
5.
cable and run T&D09. See "How To Run the Test and
Diagnostic (T&D) Programs" on page 161 for Model
A00. For Model 003, see "How To Run the Test and
Diagnostic (T&D) Programs" on page 201.
Did T&D09 run without errors?
Yes
Go to step 5.
Install a new serial attachment
card. See "Serial Attachment
Card - Model A00" on page 390.
For Model 003, see "Model 003
Attachment Cards: Serial,
Twinax, LAN, Coax" on
page 359.
- or -
Install a new logic board. See
"Logic Board - Model A00" on
page 370. For Model 003, see
"Logic Board - Model 003" on
page 366.
Run T&D in Automatic Mode to
verify correct printer operation.
See "How To Run the Test and
Diagnostic (T&D) Programs" on
page 161 for Model A00. For
Model 003, see "How To Run
the Test and Diagnostic (T&D)
Programs" on page 201.
No
Record the display message
and go to "T&D Error Messages
and Actions" on page 190
(Model A00) or "T&D Error
Messages and Actions – Models
001, 002, and 003" on page 231
(Model 003), and perform the
suggested action.
Install a new host cable.
Run T&D in Automatic Mode to
verify correct printer operation.
See "How To Run the Test and
Diagnostic (T&D) Programs" on
page 161 for Model A00. For
Model 003, see "How To Run
the Test and Diagnostic (T&D)
Programs" on page 201.
Chapter 1. Diagnosing Problems
39