Panasonic KX-TCD157UAB / KX-TCD157UAW / KX-TCA115UAB / KX-TCA115UAW Service Manual ▷ View online
7.4. Check Handset Transmission
Cross Reference:
SIGNAL ROUTE (P.46)
7.5. Check Handset Reception
Cross Reference:
HOW TO CHECK THE HANDSET SPEAKER (P.38).
SIGNAL ROUTE (P.46)
7.6. Check Caller ID
Cross Reference:
SIGNAL ROUTE (P.46)
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KX-TCD157UAB / KX-TCD157U AW / KX-TCA115UAB / KX-TCA115UAW
7.7. Bell Reception
Cross Reference:
Telephone Line Interface (P.43)
Check Link (P.19)
Note:
BBIC is IC1.
7.7.1. Base Unit
Note:
BBIC is IC2.
7.7.2. Handset
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KX-TCD157UAB / KX-TCD157U AW / KX-TCA115UAB / KX-TCA115UAW
8 TROUBLESHOOTING BY SYMPTOM (BASE UNIT)
If your unit has below symptoms, follow the instructions in remedy column. Remedies depend on whether you have DECT
tester (*1) or not.
tester (*1) or not.
Note:
(*1) A general repair is possible even if you don’t have the DECT tester because it is for confirming the levels, such as
Acoustic level in detail.
Acoustic level in detail.
(*2) Refer to Check Point (Base Unit) (P.23)
8.1. Check Point (Base Unit)
Please follow the items below when BBIC or EEPROM is replaced.
Note:
After the measuring, sock up the solder of TP.
*: PC Setting (P.27) is required beforehand.
The connections of simulator equipments are as shown in Adjustment Standard (Base Unit) (P.29).
Items
Adjustment
Point
Procedure
Check or
Replace Parts
(A)
2.65V Supply
Confirmation
-
1.
Confirm that the voltage between TP187 and GND is 2.65V ± 0.2V.
IC2,Q8,C23,
C24,C25,
C26,C27,C38,
R33,R36,
D5,C41,R41,
R42,Q9,
C40,D4,X1,
C32,C33,
C36,C37
(B)
4.0V Supply
Confirmation
-
1.
Confirm that the voltage between TP91 and GND is 4.0V ± 0.2V.
D4,C40,Q9,
R41,R42,
C41,D5,C75,
C78,C69,
C66,C67,C76,
IC3
(C)
VBACK Status
Confirmation
-
1.
Confirm that the voltage between J102 and GND is 0V ± 0.4V.
IC2,Q8,C23,
C24,C25,
C26,C27,C38,
R33,R36,
D5,C41,R41,
R42,Q9,
C40,D4,R33,
X1,C32,
C33
(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.
IC2,X1,C32,
C33
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KX-TCD157UAB / KX-TCD157U AW / KX-TCA115UAB / KX-TCA115UAW
Items
Adjustment
Point
Procedure
Check or
Replace Parts
(E)* BBIC Clock Adjustment
(Important)
TP1
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 TP1 executing the command “setfreq 00 xx (where xx
is the value)” so that the reading of the frequency counter is 10.368000MHz ±
10Hz.
is the value)” so that the reading of the frequency counter is 10.368000MHz ±
10Hz.
IC2,IC3,L1,
C48,X1,C32,
C33
(F)* Hookswitch Check with
DC Characteristics
-
1.
Connect J1 (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 at off-
hook condition of normal telephone.
hook condition of normal telephone.
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.
IC2,R7,R8,
R9,R10,R77,
Q2,Q3,D2,
C1,C2
(G)*
DTMF Generator
Confirmation
-
1.
Connect J1 (Telephone Socket) to DTMF tester.
2.
Execute the command “hookoff” and “dtmf_up”.
3.
Confirm that the high frequency (1477.06Hz) group is -3dBm ± 2dBm.
4.
Execute the command “dtmf_lo”.
5.
Confirm that the low frequency (852.05Hz) group is -6dBm ± 2dBm.
IC2,R32,C22,
R23,C80,
C14,C13,Q6,
R22,R21,
R19,R20,C12,
D2,C1,
C2,R77,D3,
R12,Q2,
R7,R8,R9,
R10,Q3
(H)*
Transmitted Power
Confirmation
-
Remove the Antenna before starting steps from 1 to 5.
1.
1.
Configure the DECT tester (CMD60) as follows;
<Setting>
•
Short TP10 and GND
•
Test mode: FP
•
Traffic Channel: 5
•
Traffic Slot: 4
•
Mode: Loopback
•
PMID: 00000
2.
Execute the command “testmode”.
3.
Initiate connection from DECT tester. (“set up connect”)
4.
Execute the command “ANT 1”
5.
Confirm that the NTP value at ANT is 20dBm ~ 25dBm.
IC2,IC3,L1,
C43,C78,
C75,C69,C48,
C72,C66,
C67,C76,C57,
C73,L3,
DA1,R66,R67,
C55,C56,
R78,R79,C54,
C58,C86,
R38
(I)
Modulation Check and
Adjustment
ANT
Follow steps 1 to 3 of (H) above.
4. Confirm that the B-Field Modulation is 340kHz/div ~ 402kHz/div using data
type Fig31.
type Fig31.
5. Adjust the B-Field Modulation if required. (Execute the command “readmod”
and “wrtmod xx”, where xx is the value.)
and “wrtmod xx”, where xx is the value.)
IC2,IC3,L1,
C43,C78,
C75,C69,C48,
C72,C66,
C67,C76,C57,
C73,L3,
DA1,R66,R67,
C55,C56,
R78,R79,C54,
C58,C86,
R38
(J)
Frequency Offset
Confirmation
-
Follow steps 1 to 3 of (H) above.
4. Confirm that the frequency offset is -50kHz ~ +50kHz.
IC2,IC3,L1,
C43,C78,
C75,C69,C48,
C72,C66,
C67,C76,C57,
C73,L3,
DA1,R66,R67,
C55,C56,
R78,R79,C54,
C58,C86,
R38
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KX-TCD157UAB / KX-TCD157U AW / KX-TCA115UAB / KX-TCA115UAW
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