Bell Reception; Check Tam Operation - Panasonic KX-TG9581B Service Manual

9.1.8.

Bell Reception

9.1.8.1. Base Unit
When bell signal coming,
is there bell signal at IC601:H1and H2 (Line1)
is there bell signal at IC701:15and 17 (Line2)
YES
When bell signal coming,
is there bell signal at IC601:F3 (Line1)
is there bell signal at IC701:12 (Line2)
YES
When bell signal coming,
is there bell signal at IC601:U8 and U9.
9.1.8.2. Handset
When bell signal is coming, is there bell signal
at BBIC (IC1: 35, 37)?
YES
When bell signal is coming, is there bell signal
signal at SP+, SP-?
YES
Does the bell sound from SPEAKER?
Cross Reference:
Telephone Line Interface (P.13)
Check Link (P.33)
How to Check the Portable Speaker or Receiver (P.68)
9.1.9.

Check TAM Operation

Check IC602, and Master BBIC (IC601)
of Base Unit. (*1)
Cross Reference:
Power Supply Circuit (P.10)
Note:
(*1) When replacing FLASH MEMORY (IC602), TAM data needs to be written to it. Refer to How to download the data (P.62) of
Things to Do after Replacing IC.
Check around the following parts.
NO
<Line1>
C123,R119,C125,R121,C127,R123,C128,R124,
RA630
<Line2>
C223,R219,C225,R221,C227,R223,C228,R224,
RA720
Check around the following parts.
NO
<Line1>
R638,C636,R637,R636,C637,C635
<Line2>
C721,R724,R725,C722,R726,C723
NO
Check around IC601.
NO
Check BBIC (IC1),C78,C79,C73,C72,R77 and R76
NO
Check around SP+, SP-.
NO
Check cable of SPEAKER and resistance value
of SPEAKER. It should be about 4 Ohm.
39
KX-TG9581B/KX-TG9582B/KX-TGA950B