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KX-TG6811UAB/KX-TG6811UAM/KX-TG6812UAB/KX-TG6821UAB/KX-TGA681RUB/KX-TGA681RUM
9.1.3.2.
Handset
Note:
(*1) Refer to Troubleshooting by Symptom (Handset) (P.41)
Cross Reference:
Check Point (Handset) (P.41)
Power Supply Circuit/Reset Circuit (P.16)
Power Supply Circuit/Reset Circuit (P.16)
Check around Power Supply Circuit/Reset Circuit .
Check BBIC (IC1)
Does Handset make link with Base Unit?
(Correct working unit)
(Correct working unit)
Check around X1 and adjust clock frequency.
Refer to Check Point...(H).
Refer to Check Point...(H).
NO
NO
NO
NO (*1)
NO
Is the voltage of "1.8V" about 1.8 V?
Refer to Check Point...(A).
Refer to Check Point...(A).
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
Replace with a new Circuit Board.
Is the voltage of CP3V about 3.0 V?
Refer to Check Point...(P) .
Refer to Check Point...(P) .
Does the RF clock (CLK) oscillate: 10.368 MHz
in Handset Test Mode?
Refer to Check Point...(H).
in Handset Test Mode?
Refer to Check Point...(H).
YES
Is the voltage of CP2.8V about 2.8 V?
Refer to Check Point...(R).
Refer to Check Point...(R).
Is the NTP value OK?
Refer to Check Point...(I).
Refer to Check Point...(I).
Does Handset make link with CMD60 in
Handset Test Mode?
Refer to Check Point...(I).
Handset Test Mode?
Refer to Check Point...(I).
NO
Handset is OK. Check Base Unit.
YES
OK
Is there CMD60 (: DECT Tester)?
NO
NO
NO
YES
Is the modulation OK?
Refer to Check Point...(J).
Refer to Check Point...(J).
YES
Is the Frequency Offset OK?
Refer to Check Point...(K).
Refer to Check Point...(K).
Adjust 1.8V voltage to 1.8 V.
Refer to
Refer to
Check Point...(A).
... Continued to the next page.
Is the voltage of CP4V about 4.0V?
(When LED is ON)
Refer to Check Point...(Q).
(When LED is ON)
Refer to Check Point...(Q).
Check D3
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