IBM PCjr Hardware Maintenance And Service

987654321
Print Dots
1. Set the printer's Power switch to Off.
2. Remove the printer top cover.
3. Remove the print mechanism.
4. The resistances at CNT should be within the ranges
listed below.
5. Measure these resistances now.
Low Ohm High Ohm
Pin 1 to
Pin 9 36 50
Pin 2 36 50
Pin 3 36
50
Pin 4
36
50
Pin 5 36 50
Pin 6
36
50
Pin 7
36 50
Pin 8 to Pin 9 36
50
WERE YOU ABLE TO READ THE CORRECT
RESISTANCES?
NO The print mechanism is bad. Replace it. Repeat
the advanced test to ensure that the IBM PC
Compact printer is operating correctly.
YES The logic card is bad. Replace it. Repeat the
advanced test to ensure that the IBM PC
Compact printer is operating correctly.
Compact Printer 3-850-19

IBM PCjr Specifications

General

Brand	IBM
Model	PCjr
Category	Desktop
Language	English