EPSON Stylus Color 440/640/740
Revision A
Chapter 1
Product Description
40
1.8.4 C257 Main Board (Stylus Color 740)
C257 Main board controls Stylus Color 640 and consists of following
major electric elements.
Figure 1-14. C257 Main Board Major Electric Elements
1.8.5 Power Supply Board
C206 PSB/PSE (Stylus Color 440, 640)
C257 PSB/PSE (Stylus Color 740)
In the electric boards for Stylus Color 440, 640, 740, a switching
regulator method is used and supplies stable logic and power voltages
constantly. Also, since this C206/C257 PSB board ha secondly type
switch for its circuit system, it is possible to keep supplying electricity to
the C206main-B/C255/C256/C257 main control board for 30 seconds
even after the power switch is turned off. Using this time difference,
even when mis-operation is done by the user such as turning off the
power during the middle of printing work, it prevents thickened ink from
attaching around the nozzle plate by transferring the head to cap
position.
Figure 1-15. C206/C257 PSB/PSE Board Major Electric Elements
H T 1
C N 9
C N 7
I C 1 4 ( H e a d )
C N 8
I C 1 1 ( C R )
I C 1 2
I C 1 3
I C 2 ( A s i c )
I C 1 ( C P U )
I C 3 ( P - R O M )
I C 6 ( C G : o n l y f o r N L S P )
B a t t 1
C N 1
C N 3 C N 2
I C 4
I C 5
( 4 M D R A M x 2 )
I C 7 ( E E P R O M )
( P F D r i v e )
I C 1 5
( R e g u r a t o r )
C N 3
C N 5
C N 4
C N 1 1
Fuse(F1)
Q1(FET)
Trans(T1)
C51
CN2
IC51
PC1
C11
Filter(L1)
CN1
Содержание Stylus Color 440
Страница 1: ...EPSONStylusColor440 640 740 Color ink jet printer 4009667 ...
Страница 8: ... PRODUCTDESCRIPTION ...
Страница 42: ... OPERATINGPRINCIPLES ...
Страница 81: ... TROUBLESHOOTING ...
Страница 99: ... DISASSEMBLYANDASSEMBLY ...
Страница 129: ... ADJUSTMENT ...
Страница 153: ... MAINTENANCE ...
Страница 160: ... APPENDIX ...
Страница 203: ...EPSON Stylus Color 440 640 740 Revision B Chapter 7 Appendix 203 C206MAIN B Circuit diagrams 1of 2 See the hard copy ...
Страница 204: ...EPSON Stylus Color 440 640 740 Revision B Chapter 7 Appendix 204 C206MAIN B Circuit diagrams 2 of 2 See the hard copy ...
Страница 205: ......
Страница 206: ......
Страница 207: ......
Страница 208: ...EPSON Stylus Color 440 640 740 Revision B Chapter 7 Appendix 208 C206PSB 1 1 ...
Страница 209: ...EPSON Stylus Color 440 640 740 Revision B Chapter 7 Appendix 209 C206PSE 1 1 ...
Страница 210: ......
Страница 211: ......
Страница 212: ......