IBM 4247 Maintenance Information page 38

Table 4. MAP 0120: Attachment, Model A00 (continued)
Step Questions/Actions
There are two serial loop-back connectors. One for
3.
RS-232C (PN 08H7268) and one for RS-422A (PN
08H7259).
Do you have the serial loop-back connectors for
this printer?
Yes
Go to step 4 on page 39.
No
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.
- or -
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
38