Epson FX-1180 - Impact Printer, Service Manual

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Operating Principles
2-16 EPSON FX-880/FX-1180 Service Manual
Data from the host computer is first stored in the printer’s input buffer. The printer then converts it into
image data, stores it in the image buffer, and then transfers it to the printhead via the gate array. This is
shown in the diagram below:
H o s t c o m p u t e r
C P U
P r i n t h e a d d r i v e r
c i r c u i t
P r i n t d a t a
c o n v e r s i o n
I m a g e d a t a
t r a n s f e r
I n p u t b u f f e r
I m a g e b u f f e r
R A M
G a t e a r r a y
D a t a l a t c h
a n d
d a t a o u t p u t
Figure 18. Data Flow
Figure 19. MAIN Board Component Layout (C229)
CN3
PF Motor Driver IC CR Motor Drive IC Gate array
E05B50
Print Head Driver
EEPROM
PSRAM
PROM
CPU