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KX-TG6621RU/KX-TG6621UA/KX-TG6621CA/KX-TG6622CA/KX-TGA661RU
9.1.8.
Bell Reception
9.1.8.1.
Base Unit
9.1.8.2.
Handset
Cross Reference:
Telephone Line Interface (P.10)
Check Link (P.27)
How to Check the Handset Speaker or Receiver (P.61)
Check Link (P.27)
How to Check the Handset Speaker or Receiver (P.61)
9.1.9.
Check TAM Operation
Cross Reference:
Power Supply Circuit (P.9)
Note:
(*1) When replacing FLASH MEMORY (IC421), 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)
Check around C54, C55, R36, R37.
When bell signal is coming, is there bell sound
signal at BBIC (IC7: 21, 23)?
signal at BBIC (IC7: 21, 23)?
NO
Check around IC7 (42), C147, C148, C145, C146,
C149, C150, SPp, SPn and SPEAKER.
C149, C150, SPp, SPn and SPEAKER.
NO
YES
When bell signal is coming, is there bell sound
signal at BBIC (IC7: 18)?
signal at BBIC (IC7: 18)?
YES
Check around C3, C4, C5, C6, R3, R4, R5, R6,
C136, C137, R32, R33, R34, R35, C52, C53,
P1, C168, C42, C43,R42,R43
C136, C137, R32, R33, R34, R35, C52, C53,
P1, C168, C42, C43,R42,R43
NO
When bell signal is coming, is there bell sound
signal at IC7 (41, 43)?
signal at IC7 (41, 43)?
Does the bell sound from SPEAKER?
Check around SP+, SP- .
When bell signal coming, is there bell sound signal
at BBIC (IC1: 34, 36)?
at BBIC (IC1: 34, 36)?
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 , C77, C76, R77, R76.
D14 , C77, C76, R77, R76.
NO
Check cable of SPEAKER and resistance value
of SPEAKER.
of SPEAKER.
Check IC421 and BBIC (IC7) 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 VDD3 of Base Unit about 2.85 V
and VDD1 about 1.8 V, VDD4 about 3.0 V, VDD5
about 3.0 V?
and VDD1 about 1.8 V, VDD4 about 3.0 V, VDD5
about 3.0 V?
YES
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