Philips PM6652, PM6654 Service Manual

Programmable

Timer

—

Counters

PM

Service

9499

465

00511

850415

First

6652,

Manual

edition

-54

Scientific

&

Scientific & Industrial

Equipment

Division

PHILIPS

CEX-board

Channel

TEEE-488

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bus

PM

9610

9696

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10. CIRCUIT

DIAGRAMS

one

below

of

it.

the

numbers

is written

to the

left

or

component

ponent

sistor

name

network,

number

below.

has

above

A

a

resistor

frame

and

their

drawn

contained

value

around

in

or

it

a

com-

re-

and

other

These

fashioned,

components.

components

hand-drawn,

are

symbols.

similar

They

to

have

the

their

old-

the

coordinates

following

connection

code

indicates

two

on

positions

the

continues.

sheet.

the

sheet

in

The

the

first

number

code

position

gives

while

the

in

the

Resistors,

capacitors, diodes,

The

left

signal

to

flow

the

right.

through

a symbol

transistors

is always

and

from

The

sheets

the

other

and the

sheet,

connection

(only

used

continues

on U1).

on

{>

gram

for

a unit

is

divided

onto

two

code

written

on each

arrow

indicates

where

cates

written

The

component

that

inside.

the

name

output/input

A small

is written

circle

inverts

below

on a

the

signal.

symbol.

indi-

the

This

same

arrow

sheet.

is used

when

the

circuit

dia-

bers

description

is

Inside

a

are

complex

the

written

symbol,

of

circuit,

the

outside

at

circuit’s

the

top

function.

symbol

is an

functions

abbreviated

and,

if

num-

are

it

>

somewhere

cate

This

that

arrow

else

the

indicates

on

connection

the

circuit

a continuation

is

diagram:

continued

on

conform

designed

component

to

number

be

IEC-standards.

logical

is written

and

These

easy

above

to

symbols

the

read.

symbol.

are

The

signal

NOTE:

continues

Two

different

on the

arrows

are

used

to indi-

Circuit

Most

diagrams

symbols

are

computer

drawn.

the

symbols

tance,

terminated

If

These

a signal

coordinates

for

instance

with

line

an

or

give

to

arrow

a bus

another

the

and

is

position

to

sheet,

X-Y

go

coordinates.

a

where

it

long

can

dis-

the

be

designated

X-Y

cated

(vertical).

matrix.

with

a

A...S

Any

The

digit

position

X-coordinates

and

the

a letter

can

Y-coordinates

therefore

(horisontal)

coordinate.

be

0...11 are

lo-

where

NOTE:

A

it

leave

signal

leaves.

the

entering

bus

at several

a bus

points.

at one

point

can

Most

Format

diagrams

in this

manual

are

drawn

within

an

together

is

ral

given

signals

as

a code.

a

traveling

bus.

In

When

that

the

a

way

signal

same

it

way

enters

is

can

easy

be

a

to

bus

drawn

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it

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the

"write"

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=

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WR.

low",

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WR

a

=

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inverted

is negated

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Seve-

above

and

gram,

the

indicates

connections

such

the

as GND

number

that

and

of

are

supply

the

not

pins

voltages.

shown

on

in

each

the

IC

dia-

and

Signals

are

named

after

what

they

do,

e.g.

Each

list

component

of the

IC:s

layout

used

has

in

been

the

completed

unit.

This list

with

a

mounted

one.

The

components.

new

version

is equipped

with

surface

positioned

tenth

unit.

resistor

on the

in

"Unit

the

component

6" and

10 that

list

it

for

is

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unit,

ponent

in two

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Channel

for

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C (PM

PM

9610),

6652

the

and

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6654.

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new

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is

that

a typical

it is

component

a resistor,

number.

"6"

that

The "R"

it is

This

chapter

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