Epson 2180 - LQ B/W Dot-matrix Printer, Service Manual

Page: 22 / 56

LQ-2180 Revision A
Product Description Main Components 22
1.4.1 C272MAIN Board
The C272MAIN Board is composed of the CPU (TMP96C141), gate
array (E05B42), program ROM that integrates the CG, EEPROM, and
24 transistors used to drive the printhead. Note the C272MAIN Board has the following 4 versions; 1) Standard
version, 2) NLSP version, 3) Korean version, and 4) Thai version.
However, ICs are attached in two different ways, which varies
depending on the version, as shown in the red boxes in the figure
below.
Figure 1-4. C272MAIN Board
H e a d D r i v e
T R A N S I S T O R
C N 2
I C 1 C P U
T M P 9 6 C 1 4 1
I C 3
G A T E A R R A Y
E 0 5 B 4 2
I C 1 0 P - R O M ( 4 M )
I C 5
E E P R O M
I C 7 C G - R O M ( 8 M )
C N 1 5
C N 1 4
C N 1
C N 1 0
I C 1 2 A 2 9 1 7
S L A 7 0 2 4 M
C N 8
C N 9
C N 1 3
C N 1 2
C N 1 6
C N 7
C N 1 7
C N 3
C N 4
C N 5
C N 6
C N 1 1
I C 1 0
I C 7
I C 6
P r o g r a m & C G
( 8 M b i t )
( S t a n d a r d / N L S P / T h a i )
C G R O M ( 8 M b i t )
I C 1 0
I C 6
N o t M o u n t e d
( K o r e a n )
P r o g r a m ( 4 M b i t )
C G R O M ( 8 M b i t )
I C 6
( K o r e a n V e r s i o n O n l y )