Diagraph I.V./700, Service Manual

Page: 46 / 50

5750-212
Revision A
Page 46
WARNING: ESD SENSITIVE DEVICE. OBSERVE PRECAUTIONS.
Use anti-static protection throughout these procedures. Follow the directions included with
disposable wrist strap.
Record the Printhead Settings
Replacing the firmware (chips U3 and U4) will
eliminate all message formats and printhead values.
Use the chart above to record the column dot value
and the settings for single dot diameters and first
dot values.
1 Simultaneously press ALT and INFORMATION and
reconnect the power. Release the keys when the
LCD shows the information menu.
2 Press SET-UP. The LCD will show the beginning of
the Set-Up menu. Press I. The LCD will display
"Column Dot Adjust:".
3 Record the value shown in the second line of LCD
under "Column Dot Adjust:". Press ENTER.
4 Press SET-UP then J. The LCD will show "Dot: 1".
Press ENTER.
5 Record the value shown after "Dot Size" on the
LCD in the Valve 1 row in the chart below. Repeat
this operation for all seven dots.
6 After the seventh dot, press SET-UP. The LCD will
respond with "Factory Setting Y/N?" Press ENTER.
7 Press Set-Up then K. The LCD will show "First Dot
Time" and a number of seconds. Record the number
of seconds in the chart above and press ENTER. This
setting is usually 000.
8 The screen will display "1st Dot Adjust.: 1" for the
first valve (dot) at the top of the printhead. The
second line of the LCD will show a value for "Dot
Adjustment." Record this value in the "1st Dot"
column at right and press ENTER.
9 The LCD will change to "1st Dot Adjust.: 2." Re-
peat the process in step 8 until all the values for
first dot are recorded in the chart.
10 After the seventh dot, press SET-UP. The LCD will
respond with “Factory Setting Y/N?” Press ENTER.
Removing the Old Chips
1 Disconnect power by unplugging the barrel con-
nector from the base of the controller.
2 Unscrew the ink canister and set aside.
3 Unscrew the four Phillips screws at the corners of
the controller and remove the top cover. Set aside
the cover and the screws.
4 Remove the keypad assembly by prying up at the
pin strip connectors on each side of the keypad
board with a small screwdriver. Set aside the key-
pad assembly.
5 Remove chips U4 and U3 by pressing on the clips
at the top and bottom of the DIP sockets.
6 Set aside chips for RGA return.
I . V . / 7 0 0
F i r m w a r e
5 7 5 0 - 1 1 7 N & 1 1 8 N