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2.1
Troubleshooting
Chapter 2 describes how to determine if a Field Replaceable Unit (FRU) in the T4700CS/
T4700CT/T4800CT is causing the computer to malfunction. The FRUs covered are:
1.
Power Supply Board
2.
System Board(s)
3.
Floppy Disk Drive
4.
Hard Disk Drive
5.
Keyboard
6.
Display
7.
Status Indicator Panel
The Diagnostics Disk operations are described in Chapter 3 and detailed replacement proce-
dures are given in Chapter 4.
The following tools are necessary for implementing the troubleshooting procedures:
1.
A T4700CS/T4700CT/T4800CT Diagnostics Disk
2.
A Phillips head screwdriver (2 mm)
3.
A Toshiba MS-DOS system disk
4.
A 2DD or 2HD formatted work disk for floppy disk drive testing
5.
A cleaning kit for floppy disk drive troubleshooting
6.
A printer port LED
7.
An RS-232-C wraparound connector
8.
A printer wraparound connector
9.
A multimeter
10.
An external 5.25-inch floppy disk drive
11.
An external CRT
12.
A Password Deletion Program floppy disk
T4700CS, T4700CT, T4800CT
2-1
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