Panasonic KX-TCD400RUB

KX-TCD400RUB I KX-TCD400RUC I KX-TCD400RUF I KX-A140RUB I KX-A140RUC I KX-A140RUF
11.6. Bell Reception
11.6.1. Base Unit
YES
When bell signal coming, is there bell signal at
NO ^
Check around R1 ~ R6, R29, R30, СЗ, C4.
BBIC (26, 27)
?
r YES
NO ^
Check around BBIC.
When bell signal coming, is there bell LED
signal at BBIC (44)?
When bell signal conning, is bell LED
switching on and off?
NO
Check around LED1, Q10, R68.
Note:
BBIC is IC2.
11.6.2. Handset
When bell signal coming, is there bell sound signal
at BBIC (41, 42)?
, YES
When bell signal coming, is there bell sound signal
atTP1, TP2?
4
r YES
Does bell sound from RECEIVER?
NO
Check link in Check Link, and around BBIC.
NO
Check around R17, R20, СЮ, C11, C12,
C31, D6, D7.
NO
Replace with the new RECEIVER.
Cross Reference:
Telephone Line Interface (P.51)
Check Link (P.31)
Note:
BBIC is IC1.
34