Panasonic KX-TG6561BXT Service Manual page 31

9.1.5. Check Link
9.1.5.1. Base Unit
Does Base Unit make link with normal working
Handset?
Is the voltage of VBAT about 3.0 V?
Refer to Check Point...(A)
Is the voltage of VDDC about 1.2 V?
Refer to Check Point...(B)
Is the voltage of +3.0V about 3.0 V?
Refer to Check Point...(D)
Does the RF clock (CLK) oscillate at 13.824 MHz in
Base Unit Test Mode?
Refer to Check Point...(G)
Check the RF part
Is there CMD60 (: DECT Tester)?
Does Base Unit make link with CMD60 in Base Unit
Test Mode?
Refer to Check Point...(J).
Is the NTP value OK?
Refer to Check Point...(J).
Is the modulation OK?
Refer to Check Point...(K).
Is the Frequency Offset OK?
Refer to Check Point...(L).
Cross Reference:
Power Supply Circuit/Reset Circuit (P.10)
Check the RF part (P.35)
Note:
*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.
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
Base Unit is OK. Check Handset.
NO
Check around Power Supply Circuit.
NO
NO
Adjust +3.0V voltage to 3.0 V.
OK
NO
Check around X501 and RF module and adjust
clock frequency.
NO
NO
NO
Replace with a new Circuit Board.
NO
NO
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KX-TG6561BXT/KX-TGA651BXT
*1
*2