5Ć31
Functional Overview
C3187Ć90000
Front Panel PCA
The plotters use the same frontĆpanel PCA as the DeskJet 550. The frontĆpanel consists of
nine LEDs and eight switches, mounted on the PCA, which is deeply recessed behind a plastic
housing containing the key pad. The keys act on the switches through push rods. Light pipes
transmit the light from the LEDs to the display area.
The LEDs are driven by drivers on the main board, under the control of the servo processor.
The LED layout is shown below:
led[1]
led[4]
led[7]
led[2]
led[5]
led[8]
led[3]
led[6]
led[9]
Front-Panel LEDs
The keypad layout is shown below:
led[2]
led[3]
led[6]
led[7]
key[0]
key[1]
Switch[1]
Switch[2]
Switch[3]
Switch[4]
Switch[5]
Switch[6]
Switch[7]
Switch[8]
Front-Panel Key Pad
The switches are connected as a 4x2 matrix. The switch matrix, when scanned, is driven by
the four LED control signals led[2], led[3], led[6] and led[7]. The servo processor scans the
switch matrix by setting, in turn, each of the four control signals to `0' while holding the
other three at `1'. While driving the switch matrix, the processor reads the signals key[0],
and key[1]. A `1' on a key signal indicates a closed switch.
Summary of Contents for DesignJet 200
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Page 22: ...2Ć4 Site Planning and Requirements C3187Ć90000 ...
Page 23: ... ...
Page 27: ... 4 1 2 3 4 5 6 mm 0 25 in 5 1 2 3 4 5 B A B A A B A B X X X ...
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Page 149: ...8Ć0 8 Troubleshooting ...
Page 178: ...8Ć30 Removal and Replacement C3187Ć90000 ...
Page 179: ...9Ć0 9 Product History and Service Notes ...
Page 193: ...10Ć1 10 Parts and Diagrams ...
Page 197: ...10Ć5 Parts and Diagrams C3187Ć90000 Legs and Media Bin 1 2 3 3 4 5 6 7 1 3 4 3 3 3 3 3 8 8 ...
Page 199: ...10Ć7 Parts and Diagrams C3187Ć90000 Window Center and Bottom Covers To Carriage ...
Page 203: ...10Ć11 Parts and Diagrams C3187Ć90000 Left Endcover and Trim ...
Page 205: ...10Ć13 Parts and Diagrams C3187Ć90000 Right Endcover and Trim ...
Page 207: ...10Ć15 Parts and Diagrams C3187Ć90000 Carriage Axis Drive Left End ...
Page 209: ...10Ć17 Parts and Diagrams C3187Ć90000 Service Station 1 2 3 3 4 5 7 6 6 ...
Page 215: ...10Ć23 Parts and Diagrams C3187Ć90000 Media Drive Assemblies ...
Page 219: ...10Ć25 Parts and Diagrams C3187Ć90000 Bail and Overdrive Assemblies ...
Page 221: ...10Ć27 Parts and Diagrams C3187Ć90000 Pinch Arm Assembly ...
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Page 244: ...IndexĆ04 C3087Ć90000 ...
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