IBM PS/1 User Manual

MAP 2400 (continued)
1
5
11
15
6
10
Figure 2-15. Display Connector
ARE THE VOLTAGES CORRECT?
Yes No
107
Replace the system board.
108
Replace the display. If the symptom remains, replace the system board.
1. Press 7; then press Enter and check for:
0 to +0.2 V dc from pin 13 to 10 (ground)
0 to +0.2 V dc from pin 14 to 10 (ground)
2. Press Enter; then check for:
+3.5 to +4.5 V dc from pin 13 to 10 (ground)
0 to +0.2 V dc from pin 14 to 10 (ground)
3. Press Enter; then check for:
0 to +0.2 V dc from pin 13 to 10 (ground)
0 to +0.2 V dc from pin 14 to 10 (ground)
4. Press Enter; then check for:
+0.5 to 1.0 V dc from pin 13 to 10 (ground)
+3.5 to 4.5 V dc from pin 14 to 10 (ground)
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IBM PS/1 Specifications

General

Processor	Intel 80286 or 80386
Processor Speed	10 MHz (80286)
RAM	1 MB (expandable to 2 MB or more)
Storage	40 MB hard drive
Floppy Drive	3.5" 1.44 MB
Graphics	VGA
Ports	Serial, Parallel, Mouse