HP 7942 Service Manual page 92

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P7
30
31
32
33
34
35
36
37
38
39
3A
JB
JC
JD
JE
JF
PJ
Service Inf orma tion
7942 and 7946
r
I
4A 48 4C 40 4E 4F 50 51 52 53 54 55 56 57 58 59 SA 58 5C 50 5E 5F 60 61 62 63 64 65 66 67 68
Z Z
Z Z
Z Z
Z Z
DEi DE DE DE DE DE DE DE DE DE DE DE DE
S
S
S
S
E
Fe
s
S
S
Fe
Fe
Fe
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
E E
E E
E E
E E
FC FC FC FC FC FC FC FC Fe Fe FC Fe
s s s s s s s s s s s s
S S S S S
S
S S S S S S
S
S S
S S
S S
S S
S S S
FC FC FC FC FC FC FC FC Fe Fe FC Fe
FC FC FC FC FC FC FC FC Fe Fe FC Fe
FC FC
FC FC
FC Fe
FC Fe
IDE
=
DATA ERROR
BYTE
IE =
DISC CONTROLLER IC ERROR REGISTER
Fe
=
FAULT CODE LIST
DE
S
S
S
S
E
Fe
S
S
S
Fe
FC
Fe
Z
DE DE
S
S
S
S
E
Fe Fe
s
S
S S
S S
Fe Fe
FC Fe
Fe
Z
Z
Z
Z
Z Z Z
Fe
Fe
Z
DE DE DE DE DE
E
DE DE DE DE
S
S
S
S
E
Fe
s
S
S
Fe
Fe
Fe
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
E E
E
E
Fe Fe Fe Fe
Fe Fe Fe Fe
S
s
S
s
s
s
S
s s
S S S
S
S
S S S
S
S S S
S
S
S S S
S
Fe Fe Fe Fe
Fe Fe Fe Fe Z
FC FC Fe Fe
Fe
Fe Fe Fe FC
Fe Fe
Fe
Fe
N
=
NUMBER OF SEEKS
S
=
DISC CONTROLLER IC STATUS REGISTER
Z
=
ALL ZERO'S
3
OF 3
Z
FILE -FSJEF20A
Figure 4- 3. P 8 Signal Source (Sheet 3 of 3)
4-23

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