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KX-TG6811RUB/KX-TG6811RUM/KX-TG6812RUB/KX-TG6821RUB/KX-TG6821RUM/KX-TG6822RUM/KX-TG6881RUB/KX-TG6891RUB/KX-TGA681RUB/KX-TGA681RUM/KX-TGA20EXB
9.1.8.
Bell Reception
9.1.8.1.
Base Unit
*1 KX-TG6821 only
9.1.8.2.
Handset
Cross Reference:
Telephone Line Interface (P.12)
Check Link (P.30)
Check Link (P.30)
How to Check the Handset Speaker or Receiver (P.61)
9.1.9.
Check TAM Operation (for KX-TG6821 only)
Cross Reference:
Power Supply Circuit (P.13)
Note:
(*1) When replacing FLASH MEMORY (IC601), TAM data need to be written to it. Refer to Base Unit of Things to Do after
Replacing IC or X'tal (P.58)
Replacing IC or X'tal (P.58)
When bell signal is coming, is there bell sound
signal at BBIC (IC501: 5)?
signal at BBIC (IC501: 5)?
NO
Check around IC501 (30), C476, C477, C478,
C479, D472, D473, SPp, SPn and SPEAKER.
C479, D472, D473, SPp, SPn and SPEAKER.
YES
Check around C110, C111, C112, C113, C114,
R111, R112, R113, R114, D113, Q111, P101 .
R111, R112, R113, R114, D113, Q111, P101 .
NO
When bell signal is coming, is there bell sound
signal at IC501 (31, 29)?
signal at IC501 (31, 29)?
*1
Does the bell sound from SPEAKER?
Check around SP+, SP- .
When bell signal coming, is there bell sound signal
at BBIC (IC1: 35, 37)?
at BBIC (IC1: 35, 37)?
NO
NO
YES
When bell signal coming, is there bell sound signal
at SP+, SP- ?
at SP+, SP- ?
YES
Check BBIC (IC1), C78, C79, C73, C72, D13,
D14, R77, R76.
D14, R77, R76.
NO
Check cable of SPEAKER and resistance value
of SPEAKER.
of SPEAKER.
Check IC601 and BBIC (IC501) of Base Unit. (*1)
Is there a TAM icon on the Handset display?
Turn on the Answering System.
Check Power Supply Circuit.
NO
NO
YES
Is the voltage of VBAT of Base Unit about 3.0 V
and +3.0V about 3.0 V?
and +3.0V about 3.0 V?
YES
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