Operation Panel Test - Canon PIXMA MP750 Service Manual

3-6-4 Operation Panel Tests
If you select test menu in the FACTORY mode, [1] PANEL is displayed. To select the test menu, press the
OK button. In this test, check that the display, LED lamps, and keys on the control panel are operating
correctly.
(a) Display test
If you press Color Start key in the menu of the operation panel, 20 letters of "H" are displayed in two lines. If
you press Color Start key one more time, all the LCD dots are displayed. If you press Color Start key once
again, "_" is displayed. Verify that there are no LCD dots which fail to be displayed by performing this
operation.
(b) LED lamp test
The LED lamp test is selected by pressing the Color Start key after the display test.
When the Color Start key is pressed, all the lamps on the control panel light. Check for any LED that does not
light during the test.
(c) Operation key test
The Operation key test is selected by pressing the Color Start key after the LED lamp test.
In this test, you press the key corresponding to the displayed character to put it out. The table giving the
correspondence between the characters and the keys is below.
Character Operation key Character Operation key
1-# Numeric keys
M Menu
- - button
P Paper button
N Enlarge/Reduce button
S SCAN button
C COPY button
I Image Quality button
T Two-Sided button
H Hook button (MP780 only)
R Redial/Pause button (MP780 only)
C Color button
a-h One-Touch Speed Dial Key (MP780 only)
(d) One-touch speed dial test (MP780 only)
When all the characters displayed have gone out, the system next starts the one-touch speed dialing key test. The
letters a-j are displayed on the display, corresponding to one-touch speed dialing keys 01-10. Each letter
displayed on the display goes out when its corresponding one-touch speed dialing key is pressed.
In this test, check for operation keys whose corresponding character or letter does not go out when the key is
pressed.
O ON/OFF
E OK button
+ + button
L Collate button
P PHOTO button
X FAX button (MP780 only)
F Feed Switch button
O Exposure
A 2 on 1 button
D Coded button (MP780 only)
N Black button
S Stop/Reset button
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