JRC JMA-5212-4, Service Manual

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6-4
6.1.3. Operation Unit Check (Keyboard Test)
This function checks the controls and switches on the operation panel.
1. Key Test 1. Key check
2. Buzzer Test 2. Buzzer check
3. Light 3. Operation panel light check
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Key check (Key Test)
Checks the controls and switches on the operation panel.
Each operation panel key on the display is highlighted at the same time as the key is
pressed, and the name of the pressed key is displayed.
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Buzzer check (Buzzer Test)
Checks the operation panel buzzer.
The buzzer will sound.
The buzzer automatically stops after it sounds for a specified length of time.
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Operation panel light check (Light Test)
Checks the operation panel light.
The brightness of the operation panel light will increase gradually in four levels.