11
3.2.3.
Bell Reception
[Changed from original section "9.1.7. Bell Reception"]
3.2.3.1.
Handset
Cross Reference:
Telephone Line Interface
Check Link
(P.9)
How to Check the Handset Speaker or Receiver
Does bell sound from BUZZER?
Replace with the new BUZZER.
Check around R114, D104, Q104, Q105.
When bell signal coming, is there bell sound signal
at RA102 (P1.1) and RA102 (TXD)?
NO
NO
YES
When bell signal coming, is there bell sound signal
at D104 (between A and K)?
YES
Check link in
Check Link
, and around Career module.
NO
