Lexicon MPX G2, Service Manual

Page: 58 / 165

MPX G2 Service Manual
5-10
At the Functions Tests menu turn the Encoder until the display reads the following:
Diag: Tests
< Display Char
Next press the STORE button and release, the display will read the following:
Disp Char CW/CCW
Hold < to exit
Turning the Encoder 1 position CW will display the following:
0000000000000000
0000000000000000
To fully test the display, continue to turn the Encoder. You will observe that a different character is
displayed each time the Encoder is turned. First the numbers 0-9 are shown, then the Alphabet containing
upper and lower case characters and other characters. When the display is filled with the following
character the test is complete:
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ
To exit the test, press and hold down the NO< button (for about ½ second) until the display reads:
Diag: Tests
< Display Char
Display Block Test
This test will verify all of the 32 character blocks and their pixels are functioning properly. When used in
conjunction with the character test above, most display problems can be easily identified and debugged.
At the Functions Tests menu turn the Encoder until the display reads the following:
Diag: Tests
< Display Block
Next press the STORE button and release, the display will read the following:
Disp Blk CW/CCW
Hold < to exit
When the ENCODER is turned 1 position CW, one character block in the upper left hand corner will lit as
follows:
g
Each time the ENCODER is turned in the CW direction, a character block is lit. Continuing to turn the
Encoder will effectively walk you through all 32 of the character blocks.
After the last block bottom right hand corner is tested, all display blocks will light followed by all blocks off
each time the Encoder is turned 1 position CW.
To exit the test, press and hold down the NO< button (for about ½ second) until the display reads: