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KX-TG9471B/KX-TG9472B/KX-TGA939T
9.1.8. Bell Reception
9.1.8.1. Base Unit
9.1.8.2. Portable
Cross Reference:
Telephone Line Interface (P.10)
Check Link (P.30)
How to Check the Portable Speaker or Receiver (P.70)
9.1.9. Check TAM Operation
Cross Reference:
Power Supply Circuit (P.9)
Note:
(*1) When replacing FLASH MEMORY 1 (IC761), TAM data needs to be written to it. Refer to How to download the data (P.63)
of Things to Do after Replacing IC.
Check around IC701.
NO
Check around the following parts.
<Line 1>
C151, C152, C153, R151, R152, R153,C156,
C157, C158, R156, R157, R158, C162, R162,
C165, R165, IC161
<Line 2>
C251, C252, C253, R251, R252, R253, C256,
C257, C258, R256, R257, R258, C262, R262,
C265, R265, IC261
When bell signal is coming, is there bell sound
signal at IC161: 7 (Line 1), IC261: 7 (Line 2)?
YES
NO
Check around the following parts.
<Line 1>
C171, R171, C172, R172, R173, R174, R175,
R176, IC171
<Line 2>
C271, R271, C272, R272, R273, R274, R275,
R276, IC251, IC701
NO
When bell signal is coming, is there bell sound signal
at BBIC (IC501: 11 (Line 1), IC501: 12 (Line 2))?
YES
When bell signal is coming, is there bell sound
signal at IC701 (14, 16)?
Is the bell sound heard from SPEAKER?
Check around SP+, SP-.
When bell signal is coming, is there bell sound
signal at BBIC (IC1: 33, 35)?
NO
NO
YES
When bell signal is coming, is there bell sound
signal at SP+, SP-?
YES
Check BBIC (IC1).
NO
Check cable of SPEAKER and resistance value
of SPEAKER.
Check IC502, FLASH MEMORY 1 (IC761),
FLASH MEMORY 2 (IC561), IC701 and BBIC (IC501)
of Base Unit. (*1)
Is there a TAM icon on the Portable display? Turn on the Answering System.
Check Power Supply Circuit.
NO
NO
YES
Is the voltage of TP3.0 V of Base Unit about 3.0 V
and TP1.8 V about 1.8 V?
YES
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