HP 9830 - Power Supply and Reference; Power Supply Circuitry

100/120V: 2A
220/240V: 1A
390K
1
600V
F
N50.1
120/240
100/220
100
120
220
240
POWER
OFF
ON
N50.3
N50.6
N50.4
6A
2 of
6400
25V
0.75
8
5
4
2
9
3
U51-2
723
400pF
499
7
6
10
1
REF
+IN
–IN
COMP
OE
OC
CL
CS
Q4
2N3055
845
294
N51A.A-B
18
35V
100
1N5243B
?V
47
?V
V+12S
N51A.H-J
N51A.C-D
1000
25V
1
464
N51A.V
N51B.C
V+12
N51B.D
N51B.E
8
5
4
2
9
3
U51-1
723
100pF
698
7
6
10
1
REF
+IN
–IN
COMP
OE
OC
CL
CS
511
1K
100
23094
?V
6 of
330
6V
V+5
N51A.R-T
N51A.P
Q1
2N4398
220
1N3889R
+5
22
Q2
2N3740
220
10V
180
6V
V+12
1
100pF
6.8?
?V
V+12
Q3
4-354
1
357K
22K
V+12
511
0.22?
8
5
4
2
9
3
U51-3
723
400pF
887
7
6
10
1
REF
+IN
–IN
COMP
OE
OC
CL
CS
Q7
2N3055
698
100
20766
?V
47
20V
V+16
1000
40V
N51B.M
N51B.K
N51A.F
N51A.E
499
698
V+12
+16
+12
N51B.A-B
N51B.T-V
N51A.K-N
N51A.U
Q10
3-010
33
60
6V
V+19.5
+19.5
N51B.N
23054
?V
4.7K
N51B.L
N51B.F
N52.A-B
N52.K-L
N52.C-D
N52.H
N52.E
gn
og
br
rd
yl
V+UH
V+17
HP 9830 Computer
Section: Power Supply
Page: S1 Rendition: 2014 Dec 26
POWER SUPPLY
Assembly 51
wh-bn-gy
wh-gy
gy
wh-rd-gy
N50.5
bk
Q5
3-063
500
30V
20049
?V
Q6
3-010
V–12
2.7
8
5
4
3
9
2
U51-4
723
?pF
4530
7
6
10
1
REF
–IN
+IN
COMP
OE
OC
CL
CS
4530
100
1N?
?V
?
20V
N51B.S
N51B.P
9090
3010
V+12
–12
N51B.R
680
N51B.J8
nPOP
6.8
6V
22K
Q8
4-354
47
330
NT.3
N14B.12
N11B.14
N12B.P
N13B.P13
6
Tp
3
Tn
5
4
Tn
U51-5
74121
104mS
Q
nQ
10
11
27K
6.8
6V
1