DOWNLOAD Panasonic KX-UT248RU / KX-UT248RU-B (serv.man3) Service Manual ↓ Size: 3.83 MB | Pages: 101 in PDF or view online for FREE

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This unit has the KEYs and LEDs Test mode.
By using this mode, you can easily check KEYs and LEDs.

• Unit for Test phone
• AC adaptor or Ethernet cable(PoE).

1. Connect power plug(AC adaptor/PoE).
2. Push [1] [TRANSFER] [*] within 4 seconds after Ringer Green LED is off.
3. Release the three keys after Red LED turn on.

The LCD displays [please wait ...] after a short time

1. Then LCD displays [HOOK Test] after beep.

(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 [HEADSET Test].

(When skip [HEADSET Test], Press SP-PHONE key. )
The SP-PHONE LED is on/off according to Headset detection.
Press SP-PHONE key

3. Then the LCD displays [EHS Test].

(When skip [EHS Test], Press SP-PHONE key. )
The SP-PHONE LED is on/off according to EHS detection.
Press SP-PHONE key.

4. Then the LCD displays the character "Q" and “Q”.

Confirm the character "Q" and “Q” are displayed and the backlight are on.
Press ENTER key.
Confirm all dots of LCD are on
Press SP-PHONE key.

[KEYs Test]
5.  Then the LCD displays [Key-Check Test] .

Press all keys except SP-PHONE key. 
Press SP-PHONE key. LCD displays [All keys Pressed. OK]

[LEDs Test]
6. Then all red LEDs lit.

Confirm all red LEDs.
Press SP-PHONE key.

7. Then all green LEDs lit.

Confirm all green LEDs.
Disregard the information on LCD.
Press SP-PHONE key

8.  Then the LCD displays [RESONANCE TEST]

Confirm the resonance by speaker sound.
Press SP-PHONE key.

9.  Then the LCD displays [ACOUSTIC TEST]

This TEST mode is not used in service.Press SP-PHONE key.Then it returns the first.

It is OK to quit anytime during test mode. Disconnect AC adaptor or Ethernet cable(PoE).

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Units are reset to the Factory settings by this operation (Erase stored Phone numbers, Caller list and etc.).
This operation should not be performed for a usual repair.

1. Press "1", "5", "9" and "

" keys at the same time.

2. After all of Red LEDs turn on, beep sound and all of Green LEDs turn on.
3. Power off.

When replacing the Main P.C.B., customer data shall be renewed before sticking the included MAC/Address.

(*1) : If you reuse defective P.C.B. for another repairing unit by repairing. Peel off the serial number and MAC address label on
original bottom cabinet and keep them with defective P.C.B..
(*2) : If you do not reuse the defective P.C.B. by repairing, scrap the P.C.B. to prevent the leak of customer's information in flash
ROM.

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Attach the new MAC address label and new Serial number label to the unit by placing over the old label.

Attach the new label

Attach the new label

NEW MAC Address Label

NEW Serial Number Label

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