Read Panasonic KX-TG6551RUM / KX-TGA650RUM / KX-TGA651RUM Service Manual online
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KX-TG6551RUM/KX-TGA650RUM/KX-TGA651RUM
9.1.3.
Check Link
9.1.3.1.
Base Unit
Cross Reference:
Power Supply Circuit/Reset Circuit (P.10)
Check the RF part (P.35)
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.
Execute the command "VDA"
Refer to Things to Do after Replacing IC or X'tal (P.xx) for Base Unit.
Check around Power Supply Circuit.
Adjust +3.0V voltage to 3.0 V.
Does Base Unit make link with normal working
Handset?
Handset?
Check around X501 and RF module and adjust
clock frequency.
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...(A)
Refer to Check Point...(B)
Refer to Check Point...(D)
Check the RF part
Does the RF clock (CLK) oscillate at 13.824 MHz in
Base Unit Test Mode?
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).
Refer to Check Point...(K).
Is there CMD60 (: DECT Tester)?
Is the NTP value OK?
Refer to Check Point...(J).
Refer to Check Point...(J).
Does Base Unit make link with CMD60 in Base Unit
Test Mode?
Refer to Check Point...(J).
Test Mode?
Refer to Check Point...(J).
NO
YES
YES
Is the Frequency Offset OK?
Refer to Check Point...(L).
Refer to Check Point...(L).
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