EPSON GT-7000
Chapter 2
Operating Principles
Rev. A
18
2.1.4 Control Circuit
There are 2 types of control circuit boards due to the interface
specification.
SCSI Model:B071 Main Board
USB Model: B071 Main-B Board
The difference is the only interface part with host.
2.1.4.1 Control Circuit Overview
Figure 2-6 is SCSI control circuit block diagram, and Figure 2-7 is for
USB. This scanner uses the one-tip 16-bit bus CPU(IC22) at 20MHz
frequency. Image data processing, correction, CCD sensor board, A/D
converter control are operated at ASIC(IC21). Table 2-3 shows major IC
functions.
Figure 2-6. Control Circuit Block Diagram (SCSI)
C C D B o a r d
L a m p
&
I n v e r t e r B o a r d
I m a g e D a t a
( R / G / B )
A M P .
A / D
C o n v e r t e r
( I C 2 4 )
1 2 - b i t
D a t a
E 0 2 A 2 8 ( I C 2 1 )
S R A M
( I C 8 , I C 1 2 )
D - R A M
I C 1 9 , I C 2 0 )
C L K ( C R 1 )
R e g u l a t o r
( I C 1 0 )
T e r m i n a t o r I C
( I C 1 4 )
3 . 3 V
C P U ( I C 2 2 )
C L K ( C R 2 )
C R M o t o r
D r i v e r
( I C 1 )
R e s e t I C
( I C 7 )
P R O M ( I C 5 )
C R
M o t o r
S C S I C o n t r o l l e r
( I C 1 3 )
8 - b i t D a t a
S C S I
Содержание GT-7000 Photo
Страница 1: ...EPSON EPSON EPSON France S A GT 7000 SERVICE MANUAL ...
Страница 2: ...6 59 0 18 RORU PDJH 6FDQQHU EPSON GT 7000 4009736 ...
Страница 9: ... PRODUCTDESCRIPTION ...
Страница 20: ... OPERATINGPRINCIPLES ...
Страница 28: ... TROUBLESHOOTING ...
Страница 34: ... DISASSEMBLYANDASSEMBLY ...
Страница 54: ... ADJUSTMENT ...
Страница 56: ... MAINTENANCE ...
Страница 58: ...EPSON GT 7000 Chapter 6 Maintenance Rev A 51 Figure 6 1 Lubrication Points G 2 6 G 2 6 ...
Страница 59: ... APPENDIX ...
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