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I Initial Setting
1. Connect the AC adaptor.
2. "Main" volume: MAX
3. "MIC" volume: MIN
I How to start diagnostic program
1. Set the "POWER" switch to "ON (NORMAL)" while pressing the "0" button.
2. The massage "628 TEST" is displayed on LCD.
3. Release the "0" button.
I Diagnostic program
1. MODE Switch check
1 Set to
"CASIO
CHORD" position.
2 Set to "FINGERED" position.
3 Set to "NORMAL" position.
2. SWITCH check
1 Press "0" button.
2 Press the buttons in the following order.
01
02
03
* Wait for confirmation sound.
* The Button number appears on the LCD.
* A buzzer sounds if buttons are pressed in a wrong order, and "CER" appears on LCD.
NOTE: This check cannot be aborted in mid-course.
3. AC adaptor check
1 Press "SONG BANK" button.
4. ROM check
1 Press "2" button.
5. MODEL check
1 Press "1" button.
6. ROM version check
1 Press "3" button.
DIAGNOSTIC PROGRAM
06
04 05
10
09
08
07
SwitchOK
— 7 —
Message on LCD
Casio
Frigerd
Normal
Switch
11
12
13
14
18
17
16
15
19
20
21
22
28
27
26
25
24
23
AC JACK
ROM OK
628vr050
01181626
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