Panasonic KX-TCD157UAB / KX-TCD157UAW / KX-TCA115UAB / KX-TCA115UAW Service Manual ▷ View online
8.3. Adjustment Standard (Base Unit)
When connecting the Simulator Equipments for checking, please refer to below.
8.3.1. Component View
DECT Tester
CMD60
Dummy
Handset
Handset
150
Ω
AF VOLT
METER
SP
MIC
6.3V47uF
AF
OSC
OSC
(H) (I) (J) (K) (L) (M)
Q1
S1
L2
L1
PbF
X1
IC1
IC3
IC2
JMP6
JMP2
JMP4 JMP3
JMP1
RLY1
R43
R44
R90
C89
R68
C48
C47
C27
C68
C41
C42
C43
C98
C100
C101
C102
R38
R66
R78
R79
L59
L3
C53
C55
C70
C58
C96
C73
C83
C71
DA1
R42
R41
L85
L83
C82
C84
C57
C21
C29
C35
C34
C34
C33
C32
C32
C62
C7
C9
C5
C49
C74
C2
C1
C63
C4
C11
C14
C6
C13
C10
R3
R1
R6
R2
R4
C36
C30
R61
C28
R29
R30
C19
C12
C16
C17
C51
C22
C18
C23
C24
C20
R31
R67 C105
C106
C107
R58
R57
R35
R59
C97
D5
D10
D11
R71
R72
R81
R82
R53
R54
R56
R8
C60
R55
R19
R20
R25
R28
R13
D12
D13
R14
R11
R15
R74
R73
R7
R77
D7
D8
R70
R85
R5
R9
R10
R27
R23
C80
C79
R32
R24
R91
D6
R12
R22
R92
R21
R16
R18
R18
R26
R17
D1
C103
D2
D3
C88
R88
R87
C86
C67
C76
C72
C66
C56
C59
Q6
C15
C
B C E
Q3
Q7
Q5
Q2
Q11
Q10
Q4
1
C25
Q8
64
4
5
8
1
11
28
18
ANT
J1
A201
A202
J2
Q9
D4
C81
C87
C54
L58
C69
L4
C78
C93
C94
C37
R36
R33
R52
C50
C38
C26
C91
CN4
A
C92
D9
C95
C90
R89
KXTCD150H
PQUP11175W
SA1
C40
C3
C77
JMP5
JMP8
JMP7
B
E
1
64
48
49
33
32
16
17
17
Note:
(H) - (M) is referred to Check Point (Base Unit) (P.23)
KX
-T
CD1
57UAB
/
K
X
-T
C
D157U
AW
/
K
X
-T
C
A115U
AB
/
K
X
-T
CA1
15UAW
29
8.3.2. Flow Solder Side View
Digital
Volt Meter
Volt Meter
PC
I2C PCB
(*1)
(JIG)
Digital
Volt Meter
Volt Meter
DC POWER
6V
Digital
Volt Meter
Frequency
Counter
Counter
Digital
Volt Meter
Volt Meter
Digital
Volt Meter
Volt Meter
SDA
SCL
GND
VBACK
GND
GND
TP187
GND
CHARGE+
12
2w
GND
GND
TP1
TP10
TP101
GND
GND
TP91
GND
TP45
DTMF
Tester
Tester
Call - ID
Simulator
Simulator
BELL
Simulator
Simulator
LOOP
Simulator
Simulator
AF
OSC
AF VOLT
METER
OSC
600
TP3
TP40
(A)
(D) (E) (F) (G)
(H) (N) (O)
(H) (N) (O)
(C)
(P)
(E)
(H)
(B)
(G)
TP1
TP10
TP97
TP82
TP187
TP91
C99
TP188
TP101
TP89
TP2
1
2
4
6
TP5
TP90
TP50
TP45
TP3
TP39
TP40
J101 J103 J104 J102
J105
PbF
+2.65V
SDA
SCL
GND
VBACK
CHARGE
CHARGE
Note:
(A) - (P) is referred to Check Point (Base Unit) (P.23)
(*1) Refer to Connections (P.27)
KX
-T
CD1
57UAB
/
K
X
-T
C
D157U
AW
/
K
X
-T
C
A115U
AB
/
K
X
-T
CA1
15UAW
30
9 TROUBLESHOOTING BY SYMPTOM (HANDSET)
If your unit has below symptoms, follow the instructions in remedy column. Remedies depend on whether you have DECT tester
(*1) or not.
(*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.
level in detail.
(*2) Refer to Check Point (Handset) (P.31)
9.1. Check Point (Handset)
Please follow the items below when BBIC or EEPROM is replaced.
Note:
After the measuring, sock up the solder of TP.
*: PC Setting (P.34) is required beforehand.
The connections of simulator equipments are as shown in Adjustment Standard (Handset) (P.36).
Items
Adjustment
Point
Procedure
Check or
Replace Parts
(A)
4.0V Supply
Confirmation
-
1.
Confirm that the consumption current is < 200mA, that is, there is no short
circuit.
circuit.
2.
Confirm that the voltage between TP14 and GND is 4.1V ± 0.2V.
IC1,F1,R21,
R4,C33,L2,
D1,C15,C2,
C14,Q1,R3,
R2,D2,R22,
C14,Q1,R3,
R2,D2,R22,
C26,X1,C16,
C17
(B)
VBACK Status
Confirmation
-
1.
Confirm that the voltage between TP18 and GND is 0V ± 0.4V.
IC1,F1,R21,
R4,C33,L2,
D1,C15,C2,
C14,Q1,R3,
R2,D2,R22,
C14,Q1,R3,
R2,D2,R22,
C26,R16,X1,
C16,C17
(C)
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.
IC1,X1,C16,
C17
(D) Charge Control Check &
Charge Current Monitor
Confirmation
-
1.
Apply 6V between TP20(+) and TP21(-) with current limit of PSU to 250mA.
2.
Confirm that the charge current is ON/OFF.
3.
SW to decrease current limit of PSU to 100mA.
4.
Confirm that the charge current is stable.
IC1,D4,L4,
L5,Q2,Q3,
R6,D2,R22,
C26,F1,R21,
R4,C33
(E)* Charge Detection (OFF)
Confirmation
-
1.
Stop supplying 6V to TP20(+) and TP21(-).
2.
Execute the command “charge”.
3.
Confirm that the returned value is 00 (hex).
IC1,D4,L4,
L5,Q2,Q3,
R6,D2,R22,
C26,F1,R21,
R4,C33
31
KX-TCD157UAB / KX-TCD157U AW / KX-TCA115UAB / KX-TCA115UAW
Items
Adjustment
Point
Procedure
Check or
Replace Parts
(F)*
Battery Monitor
Confirmation &
Adjustment (Important)
-
1.
Apply 2.3V ± 0.005V between TP3(+) and TP4(-) with DC power.
2.
Execute the command “deactmac” to stabilize the value.
3.
Then,execute the command “readbatt”.The returned value is XX.
4.
Confirm that XX is between 98 and A8.
98 < XX < A8(Hex)
(If XX is out of range,change BBIC)
IC1,D4,L4,
L5,Q2,Q3,
R6,D2,R22,
C26,F1,R21,
R4,C33
(G) Battery low Confirmation
(Important)
-
1.
Apply 2.40V between TP3(+) and TP4(-).
2.
Confirm that there is no Speaker sound (Battery low alarm).
3.
Apply 2.20V between TP3(+) and TP4(-).
4.
Confirm that there is Speaker sound (Battery low alarm).
IC1,F1,R21,
R4,C33,
C12,C31,R17,
R20,C10,
C11,D6,D7
(H)* BBIC Clock Adjustment
(Important)
TP19
1.
Apply 2.6V between TP 3(+) and TP 4(-) with DC power.
2.
Execute the command “deactmac”.
3.
Execute the command “conttx”.
4.
Input Command “rdeeprom 00 01 01",then you can confirm the current value.
5.
Adjust the frequency of TP19 executing the command “setfreq 00 xx (where xx
is the value)”.
is the value)”.
so that the reading of the frequency counter is 10.368000MHz ± 10Hz.
IC1,L3,C57,
IC3,X1,C16,
C17
(I)*
Transmitted Power
Confirmation
TP15
Remove the Antenna before starting steps from 1 to 5. Replace C58 with
RESISTOR (0
RESISTOR (0
Ω
). Be sure to mount C58 back to the same place after checking.
1.
Configure the DECT tester(CMD60) as follows;
<Setting>
•
Test mode: PP
•
RFPI: 0102030405
•
Traffic Channel: 5
•
Traffic Slot: 4
•
Mode: Loopback
2.
Execute the command “testmode”.
3.
Execute the command “regcmd60”
4.
Initiate connection from DECT tester.
5.
Confirm that the NTP value at A201 (TP15) is 20dBm ~ 25dBm
IC1,IC3,C54,
C66,C60,
L3,C57,C55,
C56,C62,
R23,R24,C63,
C64,C65,
R18
(J)
Modulation Check and
Adjustment
TP15
Follow steps 1 to 4 of (I) above.
5. Confirm that the B-Field Modulation is 340kHz/div ~ 402kHz/div using data
type Fig31.
type Fig31.
6. Adjust the B-Field Modulation if required. (Execute the command “Readmod”
and “Writemod xx”, where xx is the value.)
and “Writemod xx”, where xx is the value.)
IC1,IC3,C54,
C66,C60,
L3,C57,C55,
C56,C62,
R23,R24,C63,
C64,C65,
R18
(K)
Frequency Offset
Confirmation
-
Follow steps 1 to 4 of (I) above.
5. Confirm that the frequency offset is -50kHz ~ +50kHz.
IC1,IC3,C54,
C66,C60,
L3,C57,C55,
C56,C62,
R23,R24,C63,
C64,C65,
R18
(L)
Sensitivity Receiver
Confirmation
-
Follow steps 1 to 4 of (I) above.
5. Set DECT tester power to -88dBm.
6. Confirm that the BER is < 1000ppm.
IC1,IC3,C54,
C66,C60,
L3,C57,C55,
C56,C62,
R23,R24,C63,
C64,C65,
R18
(M)
Timing Confirmation
-
Follow steps 1 to 4 of (I) above.
5. Confirm that the Timing accuracy is < ± 2.0ppm.
IC1,IC3,C54,
C66,C60,
L3,C57,C55,
C56,C62,
R23,R24,C63,
C64,C65,
R18
(N)*
RSSI Level
Confirmation
-
Follow steps 1 to 4 of (I) above.
5. Set DECT tester power to -88dBm.
6. Execute the command “readrssi”
7. Confirm: 25 < returned value < 43 (hex) (34 ± F (hex))
IC1,IC3,C54,
C66,C60,
L3,C57,C55,
C56,C62,
R23,R24,C63,
C64,C65,
R18
32
KX-TCD157UAB / KX-TCD157U AW / KX-TCA115UAB / KX-TCA115UAW
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