HP 7475a Service Manual

Section VI
PART
OF
Al
MAIN PCA
07475-6( I 0 I
{POWER SUPPLY
FOR
RS-232)
..,. __
+18/26V Fl
CR7
PEN
TO ERROR COMP 3. 15A
+18/26V
COIL
(UNREGULATED)
SUPPLY
Rl9
QIO
+
CRl2
C2
+12V
~ 2200
I
I
CR9
C33 C4, 17
JS
~ 47
~ .01
3
CR8
( 8)
<d
Tl
C40
C36
.47
~ 6800PF
(928)
F3
WI
120V
(8)
I • 6~
LINE
:J
2
+5V
3
+
R26
C34
C30 C28
C5-7, 15,
C37 C32
38.3
22 U21
~ CIS-22,25,26,29,45
~ 6800PF
~ 6800}.IF
REGULATOR
l YR I
~ 1.0 ~ 0.1
.01
(98) (928) (928)
C35
5.6V
(958) q ~
6
NC
~ 1.0
2
7
R21
NC
I .2 I K
C39
+
C38
+
-5V
~ 6800PF
330
VR2 C3
5. I IV
~,LI
CRl6
R23
CRl5
120
-12v
R25 R24 CRl3 CRl4
, , C42
VR3 C31 Cl4
10
10
- - 330
6. l9V
+~ 47
~ .OJ
I
+
I
\ I
VR4
__ J
6. I 9V
( 8) (8)
---
IOOV
PART
OF
Al
MAIN
PCA
07475-60 02
LINE
---
(8)
+18/26V
Fl
PEN TO ERROR COMP
3. 15A
CR7
+18/26V
COIL
TO MOTOR
DRIVERS
SUPPLY
Rl7
QIO
+
C2
(958)
CRl2
O.BA
26. I
+12V
~ 2200
+
R20
I
CR9
Cl
C4
(928l
J9
~ 68 ~ .01
NC
CR8
3
1
(908)
(8)
<d
Tl
VR4
NC
C30
C27
JI
~ 6800PF
.47
(8) (8)
F3
WI
(928)
120V
(8)
I .6A
LINE
J
2
+5V
{958) [
R22
C25
3
+
C22
C5-9, 12-,9,23
C28
C21
38.3
22 U20
~ 0.1 ~ 1.0
~ .01
~ 6800PF
REGULATOR
l VR I
220V
198)
(928)
(928)
5.6V
LINE
C26
(958) q ~
6
NC
~ 1.0
2
7
NC
C29
~ 6800PF
R21
26. I
C31
Rl9
(928) (928)
47
CRl3 2.61K
(8)
NC
·v·
-5V
(928)
1
C32 C3
NC
+~ 47
VR2
~ .QI
5. I IV
( 8) { 8)
3
240V
SERVICE SHEET
LINE
---
Figure 6-26. Power Supply,
(928)
(928)
Schematic Diagram
( 8)
NC
(928)
NC
6-31

HP 7475a Specifications

General

Brand	HP
Model	7475a
Category	Plotter
Language	English