HP 7925D Service Manual page 232

7925 Appendix A
'3 10 11 1? 13 14 15 16
o
C
B
A
MICROPROCESSOR PCA-A2
NOTES:
1. ALL D-TYPE FLIP-FLOPS ARE CLOCKED ON THE
RISING EDGE OF CLOCK SIGNAL.
2. REFER TO THE FOLLOWING FIGURES FOR DIAGRAMS
OF REFERENCED SYSTEMS:
INTEGRATED CONTROLLER A-14
MAINFRAME ASSEMBLY A-15
SPINDLE ROTATION SySTEM A-17
HEAD POSITIONING SYSTEM A-18
SECTOR SENSING SySTEM A-19
READ/WRITE SYSTEM A-20
FAULT DETECTION SYSTEM A-21
3. FOR HP 7920H AND 7925H USAGE, PROGRAMMING
JUMPERS ON PCA-A2 (SEE BELOW) ARE POSITIONED
AS FOl:.LOWS:
W360 - INSTALLED FOR RPS ONLY
W361 - NOT USED (A SPARE JUMPER CAN BE
STORED HERE)
W362 - IN 7920H, OUT 7925H
W363 - NOT INSTALLED
W312 - NOT INSTALLED
W314 - OUT 7920H, IN 7925H
W316 - INSTALLED
W318 - INSTALLED
DATA
INPUT
8US
SEE INTEGRATED
CONTROi..LER DIAGRAM (81)
STATUS
REGISTER
STAT 2
SEE INTEGRATED
CONTROLLER DIAGRAM (85)
ICA
FLT
ATTN1
FORMAT
PRT-",",==-.......-t
DRDY
FIRST
STATUS
.R
o
FIRST
STATUS
FLT
SEE FAULT
DETECTION SYSTEM
DIAGRAM (C14)
DRDY
- -....- + - - I C
SEE HEAD }
POSITIONING •
SYSTEM
DIAGRAM (83)
RST
RCL
SK
SEE FAULT
DETECTION
Pl
ACRY
e_---------_
DRDY
+5V
- - - - - - - - CLA
- - - - t - - - - - - - - - - + - - - - - - - - - - - - - - - - - - - - - - - L - . . +
ATTN 1
(811)
C
ICA
SEE
HEAD
POSITIONING
SYSTEM
DIAGRAM
(82)
00-05 & 07
TO OFFSET
MAGNITUDE
&SIGN
REGISTERS
10'
~E.FA
. .
U ~
L . . T . {
~g~~~w
DETECTION· CYliNDER
SYSTEM ADDRESS
DIAGRAfur
(85)
REGISTER
I
SERVoP;;;::AT - - - - - - - - - - - - - - - -
YF
)>--------
I ILLEGAL
l{;:
@g
e I
~YDL~~~~~
ICA iCA IP2
I I
DETECTOR 11 )
SK SKH
I
CYLINDER
1 1
I
ADDRESS
L-':~~
....: __
'_'1
-.J
N U
f
6,7,9,10,11,
H,J,K,L,M
10
10
~g·~~w
CYLINDER
ADDRESS
REGISTER
10
M
K
H
FORMAT IFORMATI
SWITC~H
S4
0-------,.
I OFF I FMT
A
, - - - - - - - - - - - - - 1 3 - - - - - - ,
I
~ I
I
I
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -...... - - - - - - - - - - - - - - - - - - - - - - - - I - C - A - - - - - - - «
.6
ICA
I
r:2----- -- ---- ------ ------- ------ - --
"DRIVEOON' i iiOi: PCAoA41
I 1
( 11 f:-CYL
I
ACRY ACRY
I
ATTENTION
I
FF
o S
Q
I
S RETRACT
ACRY C ATTENTION
I
FF
+ 5V 0 Q 1 - - - - - - - - - ,
I
_ I
I
DRDY C ACRY ATTN
=Di-
~
ATTN 117 E )>--------------« E
f------------------------.
~~~~~TION
R RET ATTN I I ATTN 1
I
ATTN 1
FF ATTN 1 :
I
o
~
a t-------tl..-----+----------' (89) :
I
}
SEE} :
I I
~~~D
POSITIONING FAULT : PON SEE FAULT
DETECTION NDPS
~
D) ( D
~
DETECTION SYSTEM
SYSTEM DIAGRAM SYSTEM
17
I
NDPS
I
~
DIAGRAM (C6)
(B3) D I A G R A M :
(8B) I
5 ) CLA ( 5 E - -
C
-
L
-
A
-
I I
I I
p) ACRY ( J
#--A-CR~Y---+---------
...- - - - - - - - .
I
I
T
I
SKH
I
~
I (
' 7
,
u
~SKH~RH {~~tLT
) HI) RH
I
E--R ....
H --+--..-..04~
~
RET DETECTION
SYSTEM
L
~~R_A_M ~
,
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ S_K --:- SK --« IN .... ...__SK
- - I --t
I
I I
L
~
DB
09
07
D6
05
CONTROL
04
8US
D3
LOWER
8YTE 02
Dl
DO
CONTROL
BUS
UPPER
8YTE
C 8USU
SEE INTEGRATED
CONTROLLER DIAGRAM
(A4)
C8USL
SEE INTEGRATED
CONTROLLER DIAGRAM
(A4)
______________________________________ • • ---J
DATA
INPUT
BUS
{
SEE INTEGRATED
I------I~ CONTROLLER
DIAGRAM (B4)
DRIVE
TYPE
REGISTER
USl
US2
USO
SC
+5V
RPS
""
SEE READ/WRITE
DIAGRAM (C4)
---_.-t
DRIVE TYPE
Pl
W360
P2
I
CLA
Pl
I
010
I---------..,....~ 15
r -- ------
--SECEOI~J~g~tJ~D--
- - - - - - - -
---;C~C;R~
- - - - - - -,- - - - - - - - - - - - - - - - - - - -
CP;--P~ >
CPS
--------I.~} m~klON
I
DIAGRAM (A4)
I
DIAGRAM
I TG8US
I }
(A4)
SOF P1 T
)>-
SOF ..
~~~D
POSITIONING
SYSTEM DIAGRAM
I
CPS
II
(Bl)
SOF P2 }
~~~D/WRITE
I
READ } +5·V
~
B
1
>-
SEL ----.. SYSTEM
SEE READ/WRITE (D4) DIAGRAM
WRITE AND SECTOR SENSING (C9) (C5)
I
FUNCTION
~
SYSTEM DIAGRAMS SK }
I
REGISTER SK
~~~I~~;~ING
RCL RCL SYSTEM
I CLS DIAGRAM (81)
I
CLA
I
usa
---<
A
I
USl
---<
1
I
US2
---<
17
I
I
I
I
I
I
I
I
I D TYPE
SEE INTEGRATED
L
CONTROLLE~ DIAGRAM
(84)
-- -- -- -- -- -- -- -- -- -- -- --
I
}
DATA
OUTPUT
SEE INTEGRATED BUS
CONTROLLER
- - -....... '-------------------------+-------------------~--
........
I
DIAGRAM (841
I
I
10
1
I
SEL
---<
1
1
3 ..P_l SE _L
-------------+-----------<:lC
r
oiCATooo
-Ai11
I
J
I
~DECIMAL
I
POINT
UNIT
I
I
SELECT
DISPLAY
o
A
15 17 16
~
l'
fj
UNIT
SELECT
C
SWITCH-S3
7311-97B
10 11 12 13 14 15 16
Figure A-16. HP 7925H Operation Control System,
Functional Diagram
A-53/A-54