KX-NT511ARUW, KX-NT511ARUB - Panasonic Telephone Service Manual (repair manual). Page 15

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15
KX-NT511ARUW/KX-NT511ARUB
7.2.
KEYs and LEDs Test mode
This unit has the KEYs and LEDs Test mode.
By using this mode, you can easily check KEYs and LEDs.
7.2.1.
Preparation
Preparation devise:
• Unit for Test phone
• AC adaptor
Set up a unit in KEYs and LEDs Test mode by key control
1. Connect power plug(AC adaptor).
2. Press "1", " " and "CONF" keys at the same time within 5 seconds after power on and turn off the Red LED. Keep it until 
"Now Loading" is displayed on  LCD.
3. Release keys.
4.After 10 seconds,all red LED turn on and beep sounds is heard.
7.2.2.
KEYs and LEDs Test
1. Then the LCD displays [HOOK Test].
(When skip [HOOK Test], Press SP-PHONE key. )
The SP-PHONE LED is on/off according to HOOK switch.
Press SP-PHONE key.
2. Then the LCD displays all dots.
Confirm all dots of LCD are on.
Press SP-PHONE key.
[KEYs Test]
3.  Then the LCD displays [Key-Check Test] .
Press all keys except SP-PHONE key. 
Press SP-PHONE key. LCD displays [Key-Check OK]
[LEDs Test]
4. Confirm all red LEDs and intercom LED turn on.
Press SP-PHONE key.
5. Confirm all red LEDs of CO line change to green
(LCD displays [VER: xx.xxx])
Press SP-PHONE key
6.  Then the LCD displays [RESONANCE TEST]
Confirm the resonance by speaker sound.
7.  Then the LCD displays [ACOUSTIC TEST]
This TEST mode is not used in service.
7.2.3.
Quit KEYs and LEDs Test mode
It is OK to quit anytime during test mode. Disconnect AC adaptor.
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