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EPL-5700L/5700i
2.2 ELECTRIC CIRCUIT
S ince the E lectric C ircuit of this printer is basically the sa m e a s th at of E P L-
5700 , this section exp lain s o nly abo ut th e M a in C on trol B o ard a nd its
re late d pa rts.
2.2.1 Operating Principles of Controller
T he C 29 2 M a in B o ard, w hich function s a s a con trolle r of the p rinte r,
con sists o f the M ain C ontrolle r and the E ngin e C ontro lle r.
Main Controller
DRAM
CPU
ROM
CPU
Figure 2-1. C292 Main Board
OPERATING PRINCIPLES
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USB I/F
TUSB
Parallel I/F
SLC
1284DRIVER
Video (CN3)
Engine Controller
ELECTRIC CIRCUIT
T he M ain C ontroller p roce sse s p rint d ata sen t from the host co m puter an d
gen erates video sig nal.
T he E n gin e C ontro ller re ceives video sig nal from the M ain C ontroller a nd
drives the e ngin e to prin t.
FUNCTIONS OF THE MAIN CONTROLLER
C o m m u nicatio n w ith the host co m puter (receiving print data and
sen din g status).
P roce ssing the p rint d ata (a nalyzing com m and and gen erating vide o
sig nal).
S ending the vide o signa l to the E n gin e C ontro lle r.
M on itoring p anel or sw itch con ditions.
FUNCTIONS OF THE ENGINE CONTROLLER
R e ceivin g th e video sig nal and sen din g en gine sta tus.
M on itoring sensors.
C o ntrolling the optiona l lo w e r casse tte.
B lock diagra m of the C 29 2 M ain B o ard a nd function of e ach device are
sho w n on the follo w ing p age .
Revision A
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