Check Bell Reception; Check Tam Operation - Panasonic KX-TGD320ALB Service Manual

9.1.12. Check Bell Reception

9.1.12.1. Base Unit
When bell signal is coming, is there bell sound
signal at BBIC (IC501 5pin : BELL)?
YES
Check IC501 of Base Unit.
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.13)
Check Link (P.31)
How to Check the Handset Speaker or Receiver (P.62)

9.1.13. Check TAM Operation

Is there a TAM icon on the Handset display?
YES
Is the voltage of VBAT of Base Unit about 3.0 V
and +3.0V about 3.0 V?
YES
Check IC601 and BBIC (IC501) of Base Unit.
KX-TGD320ALB/KX-TGD322ALB/KX-TGD323ALB/KX-TGDA30AZB
NO
Check around C101, C102, C110, C112, C113, R113,
R114, R111, R112, P101, D113, Q111
NO
Check around IC501 (VDD_PA), C507, C475, C477, C479
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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