Exercise 3-1 Floppy Disk Drives - University of Kentucky

Exerci
Floppy Di

Copyright © 2002 Heathkit Com

ise 3-1
isk Drives

mpany, Inc. All Rights Reserved

34-Wire Ribb

bon Cable

2

Mother
board
connector

3½-inch
5.25-

Twiste

5.25-inch

3½-inch
-inch

ed wires

3

A Common 34-
3½-Inch Flop

Cut-out

-Pin Connector for
ppy Disk Drives

Key Cut-out

4

Connecto
Drive B
Connectors

Connectors for 3½-in

ors for 5¼-inch drives

Drive A
Connectors

nch drives 5

Rear View of

Stripe
Side

Data
Cable

Ye
R

Bl

f 3½-Inch Drive...

Power 6
Cable

ellow Wire = 12 Volts
Red Wire = 5 Volts
lack Wires = Ground

12

Plug and Play
NO jumpers

DS 1
DS 2
DS 3

7

Most
Installati

Control cable back
Jumpers on legacy

Common
ion Problems

kwards
y drives wrong

8

Having prob
writing

blems reading or
g to disks?

9



K

DC 

V OFF

AC 1000 20M
200 2M

20 200
k
2 20
k
2m00 2k

20µ0 200

A 2m 20m 200m
10A

V  COM mA 10A

Use VOM to
check

continuity

10

Spend $5.95 f

for a new cable

11

Common Flopp
Troubleshootin

Can’t read floppy dis
Spilled liquid on disk
Can’t read or write to
Random read/write p
Floppy drive makes g
Phantom directories
Computer keeps acce
no disk is in it

py Disk Drive
ng Problems

sk
k
o disk
problems
grinding sounds

essing floppy drive even when

12

One of Several

l Error Messages...

13

Sometimes

Retry Works...

14

Try a Dif

W
BoB

fferent Disk

H
D

H
D

H
D

H

DHD

WoBoWoBintoWoBiDnt9oWoiiD8nts9oikiD8nts9kiD8s9ki8sk

15

Nicked R

Ribbon Cable

16

Throw Drive A
Tr

Away...

rash

17

DC 

V OFF

AC 1000 20M
200 2M

20 200
k
2 20
k
2m00 2k

20µ0 200

A 2m 20m 200m
10A

V  COM mA 10A

Read Power
Supply
Voltages

18

2

Still no luck fin
problem? Time

Controller
Cable
Floppy Disk Drive

nding the R/W
to swap...

19

Random Read/W

Change cable
Change drive
Check power supply

Write Problems...

y

20

The Solution

21

Configu
Disk

uring Hard
k Drives

Western
WD200 H

n Digital
Hard Drive

Jumper
(set for Cable Select) 23

Advantages o

Simpler hard drive
Eliminates rejump
Reduces electrical

of Cable Select

e configuration.
pering.
l signaling problems.

24

Disadvantages

Requires a differen
Both hard drives on
data port must be a
Select.
The hard drives on
connected in a certa

s of Cable Select

nt hard drive data cable.
n the same motherboard
able to support Cable

the data cable must be
ain order.

25