KX-TG6541RUB, KX-TGA651RUB, KX-TGA405RUB - Panasonic Telephone Service Manual (repair manual). Page 36

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(*1) Refer to Adjustment Standard (Base Unit) (P.56)
(*2) Refer to Adjustment Standard (Handset) (P.61)

(*3) Adjustment Standard (Range Extender) (P.62)

No.

Item

BU (Base Unit) Check

HS (Handset) Check

1

Link Confirmation Normal

HS, BU Mode: [Normal mode]

1. Register Regular HS to BU (to be 

checked).

2. Press [Talk] key of the Regular HS to 

establish link.

1. Register HS (to be checked) to Regular 

BU.

2. Press [Talk] key of the HS to establish link.

2

X’tal Frequency confirmation

1. Check X’tal Frequency. (*1)

(10.368 MHz ± 100 Hz)

1. Check X’tal Frequency. (*2)

(10.368 MHz ±100Hz)

3

Range Confirmation Normal

HS, BU Mode: [Normal mode]

1. Register Regular HS to BU (to be 

checked).

2. Press [Talk] key of the Regular HS to 

establish link.

3. Compare the range of the BU (being 

checked) with that of the Regular BU.

1. Register HS (to be checked) to Regular 

BU.

2. Press [Talk] key of the HS to establish link.
3. Compare the range of the HS (being 

checked) with that of the Regular HS.

No.

Item

RE(Range Extender) Check

1

Link Confirmation

HS Mode [Test Mode]

1. Register Regular HS and RE (to be checked) to Regular BU.
2. HS is power ON with “1“, “6“and “#“.
3. Press [Talk] key of the Regular HS to establish link through RE.

2

X

'

tal Frequency confirmation

RE Mode: [Adjustment]

Check X

'

tal Frequency.

(13.824000 MHz ±100 Hz)

3

TX confirmation

Regular HS Mode:
[Test RX Mode]

RE Mode:
[Test TX_Burst Mode]

1. Place Regular HS 15 cm away from a checked RE.
2. Confirm "TXDATA" waveform of RE (*3) and “RXDATA“  waveform of Regular HS by Digital 

Oscilloscope. 

4

RX confirmation

Regular HS Mode:
[Test TX_Burst Mode] 

RE Mode:
[Test RX Mode]

1. Place Regular HS 15 cm away from a checked RE.
2. Confirm "RXDATA" waveform of RE (*3) and “TXDATA“  waveform of Regular HS by Digital 

Oscilloscope. 

5

Range Confirmation Normal

BU, RE Mode: [Normal Mode]
HS Mode: Test mode

1. Place Regular HS and RE (to be checked) to Regular BU.
2. HS is power ON with “1“, “6“and “#“.
3. Press [Talk] key of the Regular HS to establish link. 
4. Compare the range of the RE (being checked) with that of the Regular RE