Functional Description 2-10
2.4
COLOR INK-JET HEAD FUNCTIONING
Color Ink jet head Description:
The color ink jet head has a replaceable sealed container that contains 51 printing
nozzles, three liquid ink containers, one for each basic color, and an electric
circuit with 51 miniresistors (Fig. 2-7a).
The nozzles are divided as follows between the three basic colors:
-
Yellow: 18
nozzles
-
Magenta:
17 nozzles
-
Cyan:
16 nozzles
The nozzle construction technology is the same as for the monochrome ink jet:
they are obtained from a Nickel and Gold compound called "electroformed". They
have a tapered structure as can be seen in figure 2-7b.
The ink is in three containers, one for each color.
Inside each of these containers there is a sponge to prevent the ink from shaking
when the head is moving thus avoiding possible interference in the carriage
translation, spillage from the vent holes and the formation of froth.
The ink arrives at the corresponding nozzles through channels in the resin layer
of the head. This layer is electrically isolated from the miniressitors.
The miniresistors are positioned to correspond to the nozzles and are connected
electrically with the head external contacts.
Summary of Contents for DECcolorwriter 520ic
Page 1: ...DECwriter 500i DECcolorwriter 520ic LJ500 and LJ520 Service Manual EK LJ50E SV A01...
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Page 80: ...Electrical Interconnections 8 2 8 2 POWER SUPPLY BOARD...
Page 81: ...Electrical Interconnections 8 3 8 3 POWER SUPPLY CIRCUIT ON MAIN BOARD...
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