IBM 2274 - Manual (Page 142)

108 IBM Desktop System HMM
Introduction
This chapter contains system board layouts and
jumper settings. It is useful when you are asked to
measure voltages. Use this information to help you
locate parts such as electronic boards, connectors,
pin numbers, and test points. This chapter also
contains jumper settings for the hard disk drive,
CD-ROM, and the connector information for modem
adapter card.