Bell Reception; Check Tam Operation (For Kx-Tgc220 Only) - Panasonic KX-TGCA20EX Service Manual

9.1.12. Bell Reception

9.1.12.1. Base Unit
When bell signal is coming, is there bell sound
signal at BBIC (IC501:CIDINp, CIDINn)?
YES
When bell signal is coming, is there bell sound
signal at IC501 (SPP, SPN)?
*1 TGC220 only
9.1.12.2. Handset
When bell signal coming, is there bell sound signal
at BBIC (IC1: 35, 37)?
YES
When bell signal coming, is there bell sound signal
at SP+, SP- ?
YES
Does the bell sound from SPEAKER?
Cross Reference:
Telephone Line Interface (P.14)
Check Link (P.31)
How to Check the Handset Speaker or Receiver (P.60)

9.1.13. Check TAM Operation (for KX-TGC220 only)

Is there a TAM icon on the Handset display?
YES
Is the voltage of VDD3 of Base Unit about 3.0 V
and VDD1 about 1.8 V, VDD4 about 3.0 V,
VDD5 about 3.0 V?
YES
Check IC601 and BBIC (IC501) of Base Unit. (*1)
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.57)
*1
KX-TGC210/KX-TGC212/KX-TGC213/KX-TGC220/KX-TGC222/KX-TGCA20
NO
Check around C103, C104, C105, C106, C107,
C109, C110, C111, C113, R101, R102, R103, R104,
R109, R110, R111, R112, P101
NO
Check around IC501 (VDD_PA), C506, C472, C473,
C477, C478, R477, R478
NO
Check BBIC (IC1), C78, C79, R77, R76.
NO
Check around SP+, SP- .
NO
Check cable of SPEAKER and resistance value
of SPEAKER.
NO
Turn on the Answering System.
NO
Check Power Supply Circuit.
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