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7901A
7901-9
o
o
XA6
o
o
o
o
XA7
- - -
- - -
- -
-
-
- - -
- - -
- ~
o
o
a
o
XA8
XA14
XA13
o
o
o
o
XA9
o
o
o
o
XAlO
o
o
o
o
XAll
o
o
o
o
XA12
~
-
-
- -
-
- - -
- -
-
-
-
-
- -
-
-
- - -
-
~-
Figure 5-23. Motherboard PC Assembly A5, Parts Location Diagram
HP 13219A
DISC SERVICE UNIT
INTERFACE
MOTHERBOARD
CONNECTIONS
(07901-60010, SER I ES 1211)
(NOTE 2)
W4P2
-
-
IL.T..:.O..:.D.:..::ISC..:...:.D-;::R I::V::E
:..1
.J1~J~4
....
C'5NT"RoL
OUTBUS BIT 3
~
OUTBUS BIT 6
SELECT AND DRIVE READY
OUTBUS BIT 5
iiiiBiJsBi'i""
OUTBUS BIT 4
INBUS BIT 0
SELECT 1
INBUS BIT 3
SE'LECT2
INBUS BIT 2
SET CYLINDER
OUTBUS BIT 2
SET HEAD AND SECTOR
OUTBUS BIT 1
RESET
OUTBUS BIT 0
HEAD2
SELECT AND SECTOR PULSE
HEAD 1
RIW FAULT C
SARS
RIW FAULT B
SAR4
RIW FAULT A
SAR 1
SERIAL DATA
SAIj 2
SUB 16
SAR 16
SUB 32
MULTIPLE SELECT INPUT
SUB 2
SELECT AND SECTOR COMPARE
SUBS
SELECT AND ACCESS READY
SUB 1
OUTBUS BIT 7
SUB 4
SUB CARRY
SUB
64
SUB 128
TEST SERVO INHIBIT
NC.
+5V
FROM SWITCH S7
FROM A1PI-7
INTERLOCK LINE
DATA PROTECT
CURRENT COMMAND
DRIVE READY LAMP
TO A4f>I-2
TOA1PI-4
TOA1P2-1
TOA4f>I-1
TOA3P3-1
FROM SWITCH
S8
FROM A1PI-2
TO A1PI-5
FROM A17-5
FROMAI7-1
FROM SWITCH S3
FROMA2P3
TO A1P2-2
NC
TO A3P3-2. A2P7
DRIVE FAULT LAMP
ENERGIZE SERVO RELAY
ENERGIZE MOTOR RELAY
CARRIAGE RETRACTED
LOAD SWITCH
LATCH DRIVE
SELECT A
SELECT B
FORMAT PROTECT
SECTOR TRANSDUCER
FROM LOGIC GROUND - - - - - - -_ _
01
TERMINAL BOARD
TO A17-9
TO A1P2-10
TO
A2P2
A
C
D
H
K
TO XAI2A-l0. XASB-lIA, XA 13-A
TO XAI2A-15. XABB-4ID, XAI3-C
FROM XAI28-11 OR XA13-14
TOXA 128-5, XA 13-9
FROM XAI2B-7 OR XAI3-20
TO XAI2B-4. XA13-8
FROM XA12B-150R XAI3-19
TO XASB-3, XAI2B-3, XA13-7
FROM XA12B-14 OR XA13-18
TO XAI2A-6, XAI3-6
FROM XA12B-13 OR XA13-17
TO XAI2A-5. XA13-5
FROM XA12B-12 OR XA13-16
TO XA12A-12, XA13-3
TO XASB-6, XA 12B-6, XA 13-15
TO XAI2A-l1, XA13-2
TO XASB-2IB,XA12A-13. XA13-1
TOXA10A-P
TO XA12A-14, XA88-3/C, XA 13-B
FROMXAll1r-5
FROM XAI2B-8 OR XAI3-11
FROM XA11B-C
FROM XA7B-K
FROM XA11A-K
FROM XA7B-J
FROM XA11A-J
FROM XA7B-H
FROM XAllA-H
FROM XA7A-l1
FROM XA11A-F
FROM XAl1A-N
FROM XAllA-M
FROM XA11A-P
FROM XA13-1O
FROM XAllA-R
FROM XA12B-9 OR XA13-12
FROM XAllB-,
FROM XA12B-l0 OR XA13-13
FROM XA11A-S
TO XA12B-2. XAI3-4
FROM XA11A-6
FROM XA11B-2
FROM XA11B-3
FROM XA11B-4
TO XA9A-12/N
NC
+5V
l,A
TO XA6·11
2,B
TO XA7BA XA 12B·l
3,C
FROM XA9A·13/P
4,D
FROM XA10A·N
5.E
FROM XA10A·M
6,F
FROM XA10A-L
7,H
FROM XAIOA-K
S,J
TO XA10A-J
9.K
'TO XA10A-H
10,L
FROM XA10A-F
I1,M
TO XAI2A-F
12.N
TO XAI2A-E
13.P
TO XAI2A-7
14,R
TO XAllB-F
+12V
-12V
+5V
DWG REV A
WRITE DRIVERI
READ PREAMPLIFIER PCA
A6 (07901-60003)
FROM XA7A·15
TO XA7A·S
FROM XA7A·14
TO XA7A·R
FROM XA7A·13
TO XA7A·P
TO XA7A·12
FROM XA7A·N
I
PI
A
--~
HEAD 0 SE LECT
ERASE DETECT
HEAD 1 SELECT
ACWRITE DETECT
I
I
C
DC WRITE DETECT
MULTI-HEAD DETECT
DECREASE WRITE CURRENT
FROM XA7A·M
FROM XA7A·l0/L
FROM XA7A·9/K
TO XA7A·H
TO XA7A·F
FROM J3·1
TO XA7A·E
+12V
-12V
WRITE GATE
WRITEA
WRITE B
READ B
READ A
11
INTERLOCK LINE
12
+12V
13
-12V
14
15
1--
sv
i
~
I
~
1
>---r---
NC
}
TOXA9B-15S~3>--+-TACHIN
FROM
~C
---+-7
4
>-+--
NC
~~~~~lJJCER
NC
-----L-7
5
)--l--
I
I
I
I
+ 1 2 V - B 1
~
+12V
TOXA10A-R--t----72 >--!--ENCODER LAMP
I I
I
INTERLOCK
sv--i--?
4
I
TOXA9A-7/H~
5
,
( T
/
I
sv-t-1
6
TO XA9A-6/F
~
7
s~S
TO XA9A-6/J
~
9
S~lO
~
{
S'V -: ~,1
+12V~2
POWER
- 1 2 v - B 3
OO"'~~r
I
I
(
I
CCHANNEL
B CHANNEL
A CHANNEL
S
FROM
ENCODER
LAMP
ASSEMBLY
}
FROMSERVO
AMPLIFIER/REGULATOR
ASSEMBLY A4
FROM
LOGIC GROUND
TERMINAL
BOARD
+5V
-12V
+12V
TOXA8A·E
FROM XA6·M
FROM XA6·L
FROM XA6·K
TO XA6·H
TO XA6·F
TOJ4·15
TO XA6·E
FROM XA6-4
TO XA6·D
TO XA6·3
FROM XA6-C
TO XA6-2
FROM XA6·B
TO XA6·1
FROM XA6·A
FROM XA 12B·B
FROM J3-2
FROM XAI2A·J
FROM XA12B·A
FROM XA12A·K
FROM XA11B·C
FROM XAI2A·L
FROM XAllB·D
FROM XAI2A·M
TO XA9B·E
FROM XAI2A·N
TO XA9B·F
FROM XA
11
B·E
TOJ4·14
TO XA10B·J
TOJ4·13
FROM XA10B·K
TOJ4·12
XA7A
I
11
12
13
14
15
XA7B
FROM XA10B·l0/L
10
NC
NC
11
M
A
C
D
NC
M
NC
12
WITH XA13·24
NC
13
WITH XA13·23
FROM/TO XABB-14/R,
XAI3-22
FROM/TO XASB-15/S,
XAI3-21
l
L-_ _ _ _ -
-
- - -
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