14 ADJUSTMENTS (BASE UNIT AND CHARGER UNIT)
If your unit have below symptoms, adjust or confirm each item using remedy column from the table.
Symptom
Remedy*
The base unit does not respond to a call from handset.
Make adjustments in item (
A
)~(
F
), (
I
)~(
M
)
The base unit does not transmit or the transmit frequency is off.
Make adjustments in item (
A
)~(
E
), (
H
)~(
J
),
(L
)
The transmit frequency is off.
Make confirmation in item (
A
)~(
E
), (
H
)~(
J
),
(L
)
The transmit power output is low, and the operating distance between base unit and handset is
less than normal.
Make confirmation in item (
H
), (
K
)
The reception sensitivity of base unit is low with noise.
Make confirmation in item (
K
)
The transmit level is high or low.
Make adjustments in item (
O)
The reception level is high or low.
Make adjustments in item (
N
)
The unit does not link.
Make confirmation in item (
A
)~(
M
)
The unit cannot charge.
Make confirmation in item (
P
)
*: Refer to
Adjustment (Base Unit)
(P.46)
14.1. Adjustment (Base Unit)
Please follow the items below when BBIC or EEPROM is replaced.
Items
Procedure
Check or
Replace Parts
(
A
)
2.65V Supply
Confirmation
1. Confirm that the voltage between J101 and GND is 2.65V ± 0.2V.
C40,C41,C42,
C43,C44,IC3,
C32,C33,C36,
C37,C39
(
B
)
4.0V Supply
Confirmation
1. Confirm that the voltage between TP11 and GND is 4.0V ± 0.2V.
D4,C36,IC2,
R61,R62,C37,
C72,D14,R74,
D9
(
C
)
VBACK Status
Confirmation
1. Confirm that the voltage between J102 and GND is 0V ± 0.4V.
IC8,C53,C54,
C55,C56,X1,
R78,R77,C52,
R74,D9,R71,
Q12
(
D
)*
BBIC Confirmation
1.
BBIC Confirmation (Execute the command "getchk").
2. Confirm the returned checksum value.
Connection of checksum value and program number is shown below.
IC8,C53,C54,
C55,C56,X1,
R78
(
E
)* BBIC Clock Adjustment
(Important)
1. Execute the command "deactmac".
2. Execute the command "conttx".
3. Input Command “rdeeprom 00 00 02”, then you can confirm the current value.
4. Adjust the frequency of TP15 executing the command "setfreq 00 xx (where xx
is the value)" so that the reading of the frequency counter is 10.368000MHz ±
10Hz.
IC8,C53,C54,
C55,C56,X1,
R78,L2,L60,
C95
(
F
)* Hookswitch Check with
DC Characteristics
1. Connect J2 (Telephone Socket) to Tel-simulator which is connected with 600
Ω
.
2. Set line voltage to 48V at on hook condition and line current to 40mA.
3. Execute the command "hookoff"
4. Confirm that the line current is 40mA ± 5mA.
5. Execute the command "hookon".
6. Confirm that the line current is 0mA ~ + 2mA.
IC8,R12,R13,
R14,R15,Q2,
Q4,D6,C6,C7,
C11,JMP9
(
G
)*
DTMF Generator
Confirmation
1. Connect J2 (Telephone Socket) to DTMF tester.
2. Execute the command "hookoff" and "dtmf_up".
3. Confirm that the high frequency (1477.06Hz) group is -6 ± 2dBm.
4. Execute the command "dtmf_lo".
5. Confirm that the low frequency (852.05Hz) group is -8 ± 2dBm.
IC8,R55,C33,
R30,C88,C19,
R26,R25,Q9,
R24,R27,C16,
R20
46
KX-TCD445BXS / KX-TCD445BXT / KX-TCD445BXF / KX-A144BXS / KX-A144BXT / KX-A144BXF /
