Overview - Epson Stylus Color 850 Product Description

2.1 OVERVIEW

Compared with printing mechanism parts and electric circuit parts of Stylus Color800, following
differences can be found in Stylus Color 850.
T
Printing Mechanism:
T
Electric Circuit:
Except for differences mentioned above, the basic components about printer mechanism and
electric circuit are same as ones of Stylus Color 800, refer to Service Manual of Stylus Color 800
for more details.
Rev. A
By registering same 5 digits head ID as Stylus Color800 to
EEPROM, using exclusive program, ID for super micro dot can be
calculated and registered automatically.
C202PSB/E power supply boards of Stylus Color850 has
compatibility with boards of Stylus Color800. Also, although board
name "C202 Main control board" are same for both Stylus Color 800
and 850, code numbers are different for each model because of
following reasons.
1) Program ROM:
Each mechanism sequence is changed and can deal with
higher speed through put than Stylus Color800.
2) Gate Array(IC2):
Program for controlling head, which is registered in the Gate
Array, is changed and various data to generate trapezoidal
waveform for super micro dot is already registered.
EPSON Stylus Color 850
Chapter2 Operating Principles
2-1