IBM PCjr Hardware Maintenance And Service

You are testing the keyboard with the keyboard cord
attached.
1. Set the system unit's Power switch to Off.
2. Disconnect the keyboard cord from the system unit
and the keyboard.
3.
Check the continuity of the keyboard cord.
iilLL
3 2 1
1
6
2x3 Connector
Keyboard Plug
from Pin:
to pin:
A2 5
B2
2
B3
4
Qvom
IS THE CORD OK?
NO The keyboard cord is bad. Replace it.
Repeat advanced POST and the advanced
tests to ensure that the IBM PCjr is operating
correctly.
YES Reattach the keyboard cord.
Go to page 3-300-11 and foUow its procedure.
Ignore suggested action 1.
3-300-12 Keyboard

IBM PCjr Specifications

General

Brand	IBM
Model	PCjr
Category	Desktop
Language	English