![background image](http://html.mh-extra.com/html/epson/stylus-color-900/stylus-color-900_service-manual_109626058.webp)
EPSON Stylus Color 900
Revision C
Operating Principles
Electrical Circuit Operation Principles
58
Figure 2-10. C265 PSB/PSE Board Circuit Block Diagram
L
N
F 1
R 1
C 1
T H 1 , T H 2
L 1
C 3 , C 4
C 2
D B 1
C
T 1
Q 1
P C 1
Q 2
Q 3
+ 4 2 V / 0 . 8 A
G P
+ 4 2
+ 4 2
+ 4 2
G P
Z D 5 1 ,
Z D 8 1 - 8 6
C 5 1 , 5 2
+ 5 V / 1 . 5 A
G L
+ 5
P S C
+ 5
+ 5
G L
7
L 5 1
OS
C 5
C 5 4
+
Z D 5 3
Z D 5 2
Z D 8 7
L 4 9 6 0
( I C 5 1 )
1
In
Q 8 4
C 8 4
+
Ou
t
R 2 8
3 0 0 K
Q 3 1
C 1 3
+ 5 V R e g u l a t o r
D 5 1
I n c o m i n g c u r r e n t p r o t e c t i o n
H i g h e r h a r m o n i c s a b s o r p t i o n
S m o o t h i n g
F u l l w a v e r e c t i f i c a t i o n
I n r u s h c u r r e n t t e m p e r a t u r e c o n v e r s i o n
S t a r t i n g r e s i s t o r
H i g h e r h a r m o n i c s a b s o r p t i o n
S m o o t h i n g
5 V l i n e o v e r v o l t a g e p r o t e c t i o n
S m o o t h i n g
4 2 V l i n e c o n s t a n t v o l t a g e c o n t r o l
4 2 V l i n e o v e r v o l t a g e p r o t e c t i o n
V o l t a g e d r o p d e l a y c i r c u i t a t p o w e r o f f
C o m e s o n w h e n a b n o r m a l .
P h o t o C o u p l e r
F e e d
b a c k
M a i n
S w i t c h i n g
F e e d
b a c k
Summary of Contents for Stylus Color 900
Page 1: ...EPSONStylusColor900 RevisionC Color ink jet printer SEIJ98006 ...
Page 8: ...Component Layout 180 Parts List 184 Exploded Diagrams 187 Circuit Diagrams 195 ...
Page 9: ... PRODUCTDESCRIPTION ...
Page 43: ... OPERATINGPRINCIPLES ...
Page 78: ... TROUBLESHOOTING ...
Page 101: ... DISASSEMBLYANDASSEMBLY ...
Page 130: ... ADJUSTMENT ...
Page 161: ... MAINTENANCE ...
Page 171: ... APPENDIX ...
Page 183: ...EPSON Stylus Color 900 Revision c Appendix Component Layout 183 Figure 7 6 C265 PNL Board ...
Page 194: ...06 03 01 02 for S E ASIA 03 03 05 03 04 EPSON STYLUS COLOR 900 No 7 10056 Rev 01 ...
Page 196: ......
Page 197: ......
Page 198: ......
Page 199: ......
Page 200: ......