38
KX-TGC220/KX-TGC222/KX-TGC223/KX-TGCA20
9.1.12. Bell Reception
9.1.12.1. Base Unit
*1 TGC220 only
9.1.12.2. Handset
Cross Reference:
How to Check the Handset Speaker or Receiver
9.1.13. Check TAM Operation
Note:
(*1) When replacing FLASH MEMORY (IC601), TAM data need to be written to it. Refer to
Base Unit
of
When bell signal is coming, is there bell sound
s
ign
a
l
a
t BBIC (IC501:CIDINp, CIDINn)?
NO
Check
a
ro
u
nd IC501 (VDD_PA), C506, C472, C47
3
,
C477, C478, R477, R478
YES
Check
a
ro
u
nd C10
3
, C104, C105, C106, C107,
C109, C110, C111, C11
3
, R101, R102, R10
3
, R104,
R109, R110, R111, R112, P101
NO
When bell signal is coming, is there bell sound
s
ign
a
l
a
t IC501 (SPP, SPN)?
*1
Doe
s
the
b
ell
s
o
u
nd from SPEAKER?
Check
a
ro
u
nd SP+, SP- .
When
b
ell
s
ign
a
l coming, i
s
there
b
ell
s
o
u
nd
s
ign
a
l
a
t BBIC (IC1:
3
5,
3
7)?
NO
NO
YES
When
b
ell
s
ign
a
l coming, i
s
there
b
ell
s
o
u
nd
s
ign
a
l
a
t SP+, SP- ?
YES
Check BBIC (IC1), C78, C79, R77, R76.
NO
Check c
ab
le of SPEAKER
a
nd re
s
i
s
t
a
nce v
a
l
u
e
of SPEAKER.
Check IC601 and BBIC (IC501) of Base Unit. (*1)
Is there a TAM icon on the Handset display?
Turn on the Answering System.
Check
Power Supply Circuit
.
NO
NO
YES
I
s
the volt
a
ge of VDD
3
of B
as
e Unit
ab
o
u
t
3
.0 V
a
nd VDD1
ab
o
u
t 1.8 V, VDD4
ab
o
u
t
3
.0 V,
VDD5
ab
o
u
t
3
.0 V?
YES
