DUPLO SEIKO CORPORATION Duprinter DP-330, Service Manual

Page: 100 / 330

99
m
Drum Section
chap.2
Description
The ink amount variation in the ink control section is read by the electric capacity variation between the
detection needles on the ink detection PCB Unit and the GND and the ink signal is output to the main PCB
Unit. The main PCB Unit controls the motor ON and OFF by this signal.
When NO INK continues while the drum rotates 20 times (the number of drum unit rotations; it varies
depending on the printing speed.*) during printing, it is determined that the ink pack is empty, "CHANGE
INK" is displayed and the machine stops printing.
(1) Ink Detection
3. Function of Parts
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See page 101
440332
Ink detection PCB unit
LED
Squeegee roller
Ink roller
Ink
Detection needle