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KX-TG6811UAB/KX-TG6811UAM/KX-TG6812UAB/KX-TG6821UAB/KX-TGA681RUB/KX-TGA681RUM
9.1.1.
Check Power
9.1.1.1.
Base Unit
Is the AC Adaptor inserted into AC outlet? (*1)
Cross Reference:
Power Supply Circuit (P.13)
Note:
(*1) Refer to Specifications (P.7) for part number and supply voltage of AC Adaptor.
9.1.1.2.
Handset
Cross Reference:
Power Supply Circuit/Reset Circuit (P.16)
Is input of IC302 about 5.5 V?
Check AC Adaptor.
Check Power Supply Circuit.
Is the output voltage of IC302 about 3.0 V?
Does BBIC (IC501: 36) oscillate at 13.824 MHz?
Check X501.
Check BBIC (IC501).
Is BBIC (IC501: 54) High?
Check BBIC (IC501).
YES
YES
YES
YES
YES
NO
NO
NO
NO
Check C321, C341 are not shorted.
YES
Check F301 are not open.
Is the output voltage of BBIC (IC501:15) about
3.0 V?
3.0 V?
YES
NO
Check Power Supply Circuit/Reset Circuit .
Check BBIC (IC1).
Check F1 is not open.
Check X1.
Is the voltage of BATT+ 2.3 V more?
Check the battery and around BATT+ and
BATT- are not shorted.
BATT- are not shorted.
Is the battery inserted BATT+ and BATT-?
Does BBIC (IC1: 7) oscillate at 10.368 MHz?
YES
YES
YES
YES
NO
NO
YES
YES
Is the voltage of +1.8V about 1.8 V?
Is the voltage of CP3V about 3.0 V?
Check BBIC (IC1).
YES
Is the voltage of CP4V about 4.0V ?
(When LED is On)
(When LED is On)
YES
Is the voltage of CP2.8V about 2.8 V?
NO
NO
NO
Check D3.
NO
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