TSC CPX4P Series, Service Manual

Page: 44 / 232

40

Pump Unit

Overview
Pump Unit is used to perform cleaning and ink supply along with Purge Unit. Pump Unit is driven by
Pump Motor (M105).Suction Pump in Pump Unit is driven by Pump Motor. Suction Pump decreases the
pressure in sub tank, collects waste ink. Ink Supply Valve, Bubble Removing Valve, and Suction Valve are
opened/closed by Pump Cams rotated by Pump Motor driven via Valve Clutches 1 and 2. The phase of
Pump Cam is detected by Pump Valve Sensor and is controlled according to the number of Pump Motor
drive pulses. These operations are controlled by Printer Controller PCB. On the Supply Valve and Suction
Valve side, 5 valves including 4 Supply Valves for 4 colors (Black, Cyan, Magenta, and Yellow) and a
Suction Valve are provided. On Bubble Removing Valve side, 4 Bubble Removing Valves for 4 colors
(Black, Cyan, Magenta, and Yellow) are provided.
This page is only for reference. Pump Unit cannot be replaced.
[1] Sensor Flag [7] Pump Motor
[2] Pump cam 1 [8] Valve Clutch 1
[3] Pump cam 2 [9] Valve Clutch 2
[4] Bubble Removing Valve [10] Pump Valve Sensor 1
[5] Ink Supply Valve [11] Pump Valve Sensor 2
[6] Suction Valve

Suction Operation
A tube pump is used to suction ink. This pump generates negative pressure in Ink Tube by pressing
Rotary Rollers against Ink Tube, thus suctioning ink. The suction amount of ink can be controlled greatly
by pressing 3 rotary rollers against the tube one after another.
Pump Unit incorporates Pressure Sensor for detecting the pressure inside Buffer. If the pressure inside
Buffer does not reach the predetermined value, Printer Controller PCB determines that a Suction Pump
error has occurred, turns on ERROR Lamp, and displays an error code on the status monitor of the
printer driver.
This page is only for reference. Pump Unit cannot be replaced.