Commodore 1541-II Uživatelská příručka stáhnout pdf (Strana 8)

Section

1-INTRODUCTION

1-1.

General

The

1541

Maintenance

Guide

is

produced

to

give

a

brief,

concise

source

of

pertinent

information

necessary

for

maintenance

of

the

VIC-1541

and

the

1541

disk

drives.

Most

of

the

information

in

this

Guide

has

come

from

the

1541

Maintenance

Manual,

which

is

also

published

by

Peltier

Industries.

For

those

persons

desiring

more

thorough coverage

of

the

1541

series

of

disk

drives,

the

1541

Maintenance

Manual

is

available

through

authorized

dealers.

1-2.

VIC-1541

vs.

1541

The

VIC-1541

(also

known

as

the

1540)

was

the

first

generation

of

the

1541

disk

drive.

Basically,

COMMODORE

selected

certain

discrete

components

which

were

present

on

the

VIC-1541

Disk

Controller

PC

Board

and

combined

them

in

custom

IC's.

When

they

did

this,

they

renamed

the

disk

drive

the

1541

and

changed

the

reference

designators

(schematic

identification

of

parts).

Functionally,

there

is

very

little

difference

between

the

two

versions.

Text

in

this

Guide

refers

to

the

VIC-1541.

Section

4

contains

the

1541

Disk

Controller

Schematic

and

Disk

Controller

PC

Board

Parts

Layout.

For

a

complete

discussion

of

the

differences

between

the

two

versions,

the

1541

Maintenance

Manual

may

be

consulted.

For

the

purposes

of

this

Guide,

the

following

table

and

close

inspection

of

the

1541

Disk

Controller

Schematic

will

enable

1541

owners

to

calibrate

and

troubleshoot

their

units.

1541

owners

must

cross-reference

all

test

points

before

attempting

any

of

the

procedures

in

this

Guide.

Jack/Plug

Numbers

VIC-1541

1541

Jl/Pl

J2/P2

J3/P3

J4/P4

J5/P5

J6/P6

J7/P7

J8/P8

J9

is

is

is

is

is

is

is

is

is

Jl/Pl

J8/P8

J2/P2

J3/P3

J5/P5

J6/P6

J7/P7

J4/P4

J9

1-3.

Warnings,

Cautions

and

Notes

Throughout

this

Guide

are

a

number

of

Warnings,

Cautions

and

Notes.

A

Warning

means

that

there

is

a

possibility

of

serious

injury,

or

even

death,

to

the

technician

if

the

Warning

is

not

heeded.

A

Caution

means

that

there

is

a

possibility

of

damage

to

the

VIC-1541

if

the

Caution

is

not

heeded.

A

Note

is

intended

to

serve

as

an

aid

to

the

technician

in

understanding

text

or

in

following

a

procedure.

Page

1-1

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