Service manual

Chapter2 Operating Principles
Rev.A
2-1
2.1 OVERVIEW
This section describes Printer Mechanism, electric circuit board (C206 PSB/PSE, C206 Main, C206PNL
board) of Stylus Color 400.
2.1.1 Printer Mechanism
Unlike previous EPSON Ink Jet printers, printer mechanism of Stylus Color 400 does not have exclusive
mechanism to change over paper feeding and Pumping operation. In stead, this control is done by the
turning direction of paper feed/pump motor and position of carriage at that time. Also, unlike previous print
heads, print head of this printer became one unit combined with black and CMY head. Black head has
64 nozzles, 180 dpi(vertical direction) and CMY head has 21 nozzles, 90 dpi (vertical direction). Also,
since these print head is driven by frequency 14.4Khz, this printer can print double resolution(1440
dpi/100-dpi) than Stylus Color. Following figure2-1 shows outline of printer mechanism.
Platen Drive Mechanism
Paper Pickup Mechanism
Pump Drive Mechanism
Carriage Motor
Paper Feed Motor
Paper Pick Up
Trigger Lever
Carriage Unit
(Prinr Head Unit)
Timing Belt
Pumping Position
Figure 2-1. Stylus Color 400 Printer Mechanism Block Diagram