IBM PS/1 User Manual

MAP 0010 (continued)
018 (continued)
IS THE MACHINE A MACHINE TYPE 2168 WITH A VOLUME CONTROL
AND SPEAKER?
Yes No
019
Replace the system board.
020
Note: The volume control and speaker are used only in World Trade
Machine Type 2168 machines. Refer to “486DX 25MHz/486DX2
50MHz or 486DX 33MHz/486DX2 66MHz (72-Pin Memory SIMM)
System Board Layout” on page 5-17.
– Make sure the volume control is not turned to low.
– Power off the system unit.
– Unplug connector J27 and jumper pins 1 and 2.
– Power on the system unit.
DID YOU HEAR A BEEP AT THE END OF POST?
Yes No
021
Replace the system board.
022
– Power off the system unit.
– Reconnect connector J27 to the system board.
– Power on the system unit.
– Measure the voltage, with the meter set at +6 V dc, between the bottom
connector on the speaker and frame ground.
– Turn up the volume control.
(Step 022 continues)
2-8

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