HP 7925D Service Manual page 128

7925
Troubleshooting
Table 4-5. Power Distribution List
J1
9,10,
11, 12,
13,14,
15,16
FAULT
INDICATOR
PeA
A12
2 2
1, 18,
A, V
CONNECTIONS VIA MAIN HARNESS
SPINDLE ENCODER INDICATOR
LOGIC PeA
PMR PCA
PCA PCA
A8 A9 A10 A11
P1 J1 J1 J1 J2
4,5, 5
13 4
0, E
4
J3 J1
17,
U,V
MOTHERBOARD PCA
A7
19, W
22,23,
Z,AA
7,8,
12,
N, P
XA6P1
11, M
RlW
PREAMPLIFIER
PCA
A6
XASP2
18, V
TRACK FOLLOWER
PCA
AS
14
1, A
4,5,
0, E
XASP1 J2
9,10,
11, 12,
13,14,
15, 16
XA4P2
18, V
6
DRIVE CONTROL
PCA
A4
4,5,
0, E
1, A
XA4P1
18, V 1, A
CONNECTIONS VIA MOTHERBOARD PCA - A7
11, 12,
14, 15,
16,19,
20,29,
31,33,
34,45,
46,47,
48,49,
50
18, V 1, A 18, V 1, A
HEAD ALIGNMENT
VO
SECTOR
PeA PCA SERVO PCA
A1 A2 A3
XA1P1 XA1P2 XA2P1 XA2P2 J1 XA3P1 XA3P2
4,5, 4,5, 26,30, 4,5,
0, E
O,E 32, 35 0, E
+10V
-24V
GROUND
+12V
3,e 3, e 3, e 3, e 3,e 9,K
20, X
3,C 5
(J
Q
C
W
t-
:5
:;:)
CJ
w
a::
-12V
2, B
2,8 2, B
2, B 2, B 10, L
21, Y 2,8
+SV
SUPPLY VOLTAGE
o
W
t-
:3
0
So
w
a:
z
::;)
DENOTES SOURCE
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