KX-TG6561RUT, KX-TGA651RUT - Panasonic Telephone Service Manual (repair manual). Page 32

32

Power Supply Circuit/Reset Circuit (P.10)
Check the RF part (P.36)

*1 How to adjust +3.0V:
Execute the command "VDA"
Refer to Things to Do after Replacing IC or X'tal (P.xx) for Base Unit.
*2 How to adjust the frequency of X501:
To see the frequency, execute the command “SFR”, then check the TP_CKM (IC501-57pin).
To adjust frequency, send command “SFR” until the frequency counter becomes13.824 MHZ±55HZ.

Check around Power Supply Circuit.

Adjust +3.0V voltage to 3.0 V. 

Does Base Unit make link with normal working
Handset? 

Check around X501 and RF module and adjust
clock frequency.

NO

NO

NO

NO

YES

YES

Is the voltage of VBAT about 3.0 V?
Refer to Check Point...(A)

Refer to Check Point...(B)

Refer to Check Point...(D)

Does the RF clock (CLK) oscillate at 13.824 MHz in
Base Unit Test Mode?

YES

Is the voltage of VDDC about 1.2 V?

Is the voltage of +3.0V about 3.0 V?

Refer to Check Point...(G)

YES

YES

Base Unit is OK. Check Handset.

NO

OK

*1

*2

NO

YES

YES

YES

YES

NO

NO

NO

Replace with a new Circuit Board.

Is the modulation OK? 
Refer to Check Point...(K).

Is there CMD60 (: DECT Tester)?

Is the NTP value OK? 
Refer to Check Point...(J).

Does Base Unit make link with CMD60 in Base Unit 
Test Mode?
Refer to Check Point...(J).

NO

YES

YES

Is the Frequency Offset OK? 
Refer to Check Point...(L).