Commodore Plus 4 Uživatelský manuál stáhnout pdf (Strana 25)

commodore

Issue 6, 1985 : Computer 1

Model: C-64, C-16, Plus 4

SCHEMATICS FOR C-64, C-16, PLUS 4

These computers have been affected by an Engineering

Change Order that adds 4 diodes to the serial port. These

protection diodes are not required as field upgrades. They

are 1N914s and were added as a circuit improvement.

The Schematic and PCB Layout for the C-64 in the

Service Manual (Pages 28 and 32) include these diodes.

However, the C-16 and Plus 4 Service Manuals were completed

before the changes were made. The Schematic corrections are

shown below:

t\J

I '

~'~

l'-.A/

Q..

'->

ROY

F822

, J,....., ........

N.C-

FB23

7'10(0

DATA

FB24

-U:;-9

3rD

elK

FB25

<:9

ATN

FB'ZG,

II/!

C5T MTR 27

+5V

114><,3

.b'

C5T RD 2(;,

....

".,.

R23

9,~lQ()

-': ...fI}

(J,

:.".:0

-::.::""'

R24

~,y

~::e

<:5

CRiP+

R2S

t;;""

lie:

-+sv

~/N

lJlOI

CST

WitT

< I ~

II(

U't'

It,.,

•

C-16 SCHEMATIC

SERIAL BUS

FEMALE

DIN

0,12

C5T WRT

PLUS 4 SCHEMATIC

t•.

U2.

1 2 ... 20 21 22 23 24 25

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