Canon iR1020 Series Service Manual page 276

Chapter 16
- LCD test
Start the OPERATION PANEL test by pressing the start key. The LCD test is carried out first, displaying all-H characters. Press the start key once again to produce
a total black display.
- LED lamp test
Press the start key after the LCD test to select the LCD lamp test, turning on all lamps on the operation panel.
- Operation key test
Press the start key after the LCD lamp test to select operation key test (1). The test succeeds if the characters appearing in the LCD are erased when the correspond-
ing keys are pressed.
When the entire character display is erased, operation key test (2) launches (only on models with the FAX feature installed). As in (1), the test succeeds if the
characters appearing in the LCD are erased when the corresponding keys are pressed.
Operation key test (1) correspondence diagram
Operation key test (2) correspondence diagram
The flow of operation panel testing is shown below.
16-46
[M] [O]
[L] [G] [Q] [A]
[7] [6] [8] [3] [5]
09: [I]
01: [A] 05: [E]
10: [J]
02: [B] 06: [F]
11: [K]
03: [C] 07: [G]
12: [L]
04: [D] 08: [H]
[N] [F] [K] [C] LCD
[B] [P] [J] [D] [E]
F-16-20
[4] [1] [0]
F-16-21
[I] [H]
[2]