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HP 7901A Operating And Service Manual page 79

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7901A

FROM/TO XA7B-15, S

FROM/TO XA7B-14, R

FROM XA7A-5

FROM J2-2

FROM J2-3

FROM J2-4

FROM J2-5

FROM XA12A-J

FROM XA12A-K

FROM XAI2A-L

FROM XA 12A-M

FROM XA12A-N

FROM XA14-A,J4-1

FROM XA 14-1, J4-9

FROM XAI4-B,J4-10

FROM XAI4-C, J4-A

FROM XA 14-7, J4-D

FROM XAI4-15,J4-8

FROM XAI2B-7, XA13-20

FROM XA12B-8, XA13-11

FROM XA12B-1O, XA13-13

FROM XAI2B-9, XA 13-12

FROM XA14-23

FROM XA14-24

Maintenance

AUXI L1ARY FUNCTION {07901-60015, SERIE,!,2

~

i--

1

XA~B(I~ ~

WRITE/READ DATA 1

)1~,~

FROMITOXA14-21

I

I

I

l

I

I

(~<

WRITE/READ DATA 2

)

1~')-L--

FROMITO XA 14-22

,

I

I

XA?,,( E

~

INTERLOCK LINE

)

5

~

TO XA9A-E

I

I

I

I

<6~

+12V

NOT USED

I

I

I

I

I

(g (

-12V

I

NOT USED

I

I

I

I

(~ ~

+5V

I

NOT USED

I

I

I

I

<1(

GROlJllD

I

NOT USED

I

I

I

I

(~<

DRIVE OUTBUS 0

I

NOT USED

I

I

I

I

(IJ~

DRIVE OUT BUS 1

I

NOT USED

I

I

I

I

I

(1;

E

DRIVE OUT BUS 2

NOT USED

I

I

I

I

(1:<

DRIVE OUTBUS 3

I

NOT USED

I

I

I

I

<l~(

DRIVE OUTBUS4

NOT USED

I

CONTROL

XA~B(l

(

NOT USED

I

I

I

OUTBUS BIT 1

:

(

~ (

NOT USED

:

I

:

(~ (

OUTBUS BIT 0

NOT USED

: I

I

(4 (

OUTBUS BIT 3

NOT USED

I

D

I

I

I

(~

(

OUT BUS BIT 4

I

NOT USED

I

I

I

I

(~(

OUTBUS BIT 2

I

NOT USED

I

I

I

I

7

SELECT AND DRIVE READY

---t<H (

NOT USED

:

I

--t<~

(

SELECT AND SECTOR PULSE

NOT USED

I

I

~K(

SELECT AND ACCESS READY

NOT USED

:

I

I

SELECT AND SECTOR COMPARE

- - + - < 9 (

NOT USED

: I

R/WCLOCK A

(1~(

I

( 1 ; (

R/WCLOCK B

L __

DWG REV A

NOT USED

I

NOT USED

I

J

Figure 5·29. Auxiliary Function PC Assembly A8,

Schematic Diagram

5·37/5·38

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