Commodore 1541-II Uživatelská příručka stáhnout pdf (Strana 12)

Section

2-CALIBRATION

2-1.

General

This

section

contains

step-by-step

procedures

for

calibrating

the

VIC-1541.

Only

one

calibration

adjustment,

to

adjust

the

speed

of

the

disk

to

300

rpm,

is

provided

in

the

VIC-1541.

Perform

the

calibration

procedure

at

the

following

intervals:

1.

Every

6

months.

2.

During

the

process

of

troubleshooting.

3.

After

a

repair

action.

2-2.

Equipment

Required

1.

Small

slotted

screwdriver

2.

Phillips

screwdriver

3.

Timing

light

(Refer

to

Appendix

B)

#

Any

strobe

light

with

an

accurate

frequency

of

50

Hz

(+/-

1%)

or

60

Hz

(+/-

1%)

may

be

used

in

place

of

the

timing

light.

4.

Blank

floppy

disk

(5

1/4

inch,

single

sided)

2-3.

Preparation

for

calibration

(Detailed

disassembly/assembly

instructions

can

be

found

in

the

1541

Maintenance

Manual.)

1.

Remove

top

cover.

2.

Remove

RFI

shield.

3.

Disconnect

P8

from

J8.

4.

Reinstall

RFI

shield.

5.

Remove

bottom

cover.

6.

Place

disk drive

on

left-hand

side.

Use

a

thin book

or

magazine

to

prop

up

drive.

(Refer

to

Figure

2-1).

Page

2-1

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