IBM 5155 User Manual

Vertical Hold Adjustment
This adjustment is required only if your mM Color
Display has a vertical-hold problem (screen
is rolling
from top
to bottom or from bottom to top.)
Vertical Hold
Control
1 Set the Power switch on the system unit, and the
Power control
on the display, to On.
2 Wait for the POST to finish.
3 Tum the Vertical Hold control clockwise as far
as it
will go, then tum it counterclockwise until
the screen stops rolling and
is steady.
3-34 Color Display

IBM 5155 Specifications

General

Model	IBM 5155
Category	Desktop
Release Year	1984
CPU	Intel 8088
Clock Speed	4.77 MHz
Display	9-inch monochrome CRT
RAM	256 KB, expandable to 640 KB
Storage	One or two 5.25" 360KB floppy disk drives
Graphics	CGA (Color Graphics Adapter)
Ports	Parallel, Serial, Keyboard
Operating System	IBM PC DOS
Weight	30 pounds (13.6 kg)

Summary

FEDERAL COMMUNICATIONS COMMISSION RADIO FREQUENCY INTERFERENCE STATEMENT

INSTRUCTIONS TO USER

Explains RF energy generation and potential interference, advising proper installation and use.

Section 1. Introduction/Installation

External Options

Illustrates external components that expand capabilities.

Installation

Outlines initial setup steps and procedures for the system.

Section 2. Problem Determination Procedures

Section 3. Operating Your IBM Portable Personal Computer

System Unit

Describes the main component responsible for processing and controlling operations.

Keyboard

Details the layout and functions of the keyboard.

Diskette Drive

Details how to insert and remove diskettes from the drive.

Section 4. Option Installation

Installation Procedures

Step-by-step instructions for physically installing options.

Section 5. Moving Your IBM Portable Personal Computer

Moving Your System Unit

Steps for preparing and safely moving the system unit.

System Setup

Instructions for setting up the system unit in a new location.

Moving Your Options

Guidance on preparing and moving peripherals and expansion units.