Panasonic KX-TCD420RUM / KX-TCD420RUS / KX-A142RUM / KX-A142RUS Service Manual ▷ View online
Items
Adjustment
Point
Procedure*
Check or
Replace Parts
(N)* Receive Audio Check
and Adjustment
ANT
J2
1. Configure the DECT tester (CMD60) as follows;
<Setting>
·
Test mode: FP
·
Mode: Normal
·
PMID: 0000
2. Execute the command "testmode".
3. Initiate connection from DECT tester.
4. Execute the command "hookoff".
5. Execute the command "openau".
6. Connect J2 (Telephone Socket) to Tel-simulator which is connected with 600
3. Initiate connection from DECT tester.
4. Execute the command "hookoff".
5. Execute the command "openau".
6. Connect J2 (Telephone Socket) to Tel-simulator which is connected with 600
Ω
.
7. Set line voltage to 48V and line current to 40mA.
8. Connect DECT tester to Tel-simulator.
9. Input audio signal (200mVrms/1kHz tone) to Tel-simulator.
8. Connect DECT tester to Tel-simulator.
9. Input audio signal (200mVrms/1kHz tone) to Tel-simulator.
<DECT tester setting>
·
Scramble: On
·
AF Gen to ADPCM: Off
·
AF Meter Input: ADPCM
·
AF Gen Frequency: 1000Hz
·
AF Gen Level: 200mVrms
10. Confirm hearing tone: 460mVrms ± 80mVrms
11. Adjust audio level if required. (Make sure current value using "getmicgain". And
11. Adjust audio level if required. (Make sure current value using "getmicgain". And
then execute the command "setmicgain xx", where xx is the value.)
12. Confirm that the B-field audio distortion with DECT tester is < 5 %.
IC6,IC4,L2,
C57,C61,C75,
C77,C78,C76,
C68,C69,R79,
R80,C63,C64,
R83,R84,C65,
L3,C79,C67,
C66,D10,C62,
R20,C14,D7,
R21,R22,R23,
R85,C15,C30,
R51,C92,R52,
C32,Q2,R12,
R13,Q4,R14,
R15,D6,C6,
C7,JMP9
(O)* Transmit Audio Check
and Adjustment
ANT
J2
1. Configure the DECT tester (CMD60) as follows;
<Setting>
·
Test mode: FP
·
Mode: Normal
·
PMID: 0000
2. Execute the command "testmode".
3. Initiate connection from DECT tester.
4. Execute the command "hookoff".
5. Execute the command "openau".
6. Connect J2 (Telephone Socket) to Tel-simulator which is connected with 600
3. Initiate connection from DECT tester.
4. Execute the command "hookoff".
5. Execute the command "openau".
6. Connect J2 (Telephone Socket) to Tel-simulator which is connected with 600
Ω
.
7. Set line voltage to 48V and line current to 40mA.
8. Input audio signal (30mVrms/1kHz tone) to DECT tester.
8. Input audio signal (30mVrms/1kHz tone) to DECT tester.
<DECT tester setting>
·
Scramble: On
·
AF Gen to ADPCM: On
·
AF Meter Input: AF Voltm
·
AF Gen Frequency: 1000Hz
·
AF Gen Level: 30mVrms
9. Confirm hearing tone: 300mVrms ± 50mVrms.
10. Adjust audio level if required. (Make sure current value using "getspkrgain".
10. Adjust audio level if required. (Make sure current value using "getspkrgain".
And then execute the command "setspkrgain xx", where xx is the value.)
11. Confirm that the audio distortion at 600R of Tel-simulator is < 5 %.
IC6,IC4,L2,
C57,C61,C75,
C77,C78,C76,
C68,C69,R79,
R80,C63,C64,
R83,R84,C65,
L3,C79,C67,
C66,D10,C62,
R20,C14,D7,
R21,R22,R23,
R85,C15,C30,
R51,C92,R52,
C32,Q2,R12,
R13,Q4,R14,
R15,D6,C6,
C7,JMP9
(P)
Charging Check
-
1. Connect Charge Contact 12
Ω
/2W register between charge+ and charge-.
2. Measure and confirm voltage across the regigster is 2.3V ± 0.2V.
D4,R43,R44
Note:
After the measuring, sock up the solder of TP.
* : PC Setting (P.40)is required beforehand.
The connection of adjustment equipment are as shown in Adjustment Standard (Base Unit) (P.46).
* : PC Setting (P.40)is required beforehand.
The connection of adjustment equipment are as shown in Adjustment Standard (Base Unit) (P.46).
45
KX-TCD420RUM / KX-TCD420RUS / KX-A142RUM / KX-A142RUS
14.2. Adjustment Standard (Base Unit)
When connecting the Simulator Equipments for checking, please refer to below.
14.2.1. Component View
Q1
S1
LED8
R60
R59
R65
R68
R58
R19
R18
L1
PbF
X1
IC7
IC4
IC8
IC9
IC6
IC3
IC5
IC1
IC2
JMP6
JMP2
JMP4
JMP3
JMP9
JMP1
JMP5
1
1
JMP8
JMP7
J1
A1
A2
J2
D4
SA1
RL
Y1
Y1
C25
C24
C2
D1
D9
D12
R78
D11
D2
D3
D7
D6
D13
D5
JMP51
JMP53
JMP52
JMP50
D14
R4
R5
R6
R7
R8
R33
R37
R51
R30
R16
R31
R17
R23
R24
R35
R34
R25
R28
R75
R71
R77
R76
R72
R73
R72
R73
C50
C51
C51
C52
C53
C56
C56
C95
R74
R70
144
109
108
R69
R49
R27
R52
R12
R9
R10
R14
R15
R39
R40
R48
R45
C27
R46
R63
R67
R2
R36
R38
R11
C88
R32
C21
C90
R20
R13
R56
R65
C77
C43
C75
C78
C33
C36
C87
C86
C37
C67
C76
C69
C83
C85
C96
C32
C94
R50
Q8
Q12
Q9
B C E
R41
R43
R47
R57
R80
R64
R62
R57
R61
R83
R84
D10
R79
L3
Q3
Q4
Q7
Q5
Q11
Q13
Q10
Q6
Q2
R1
R42
R44
R3
C1
C28
CS
14
1
1
1
1
4
5
8
16
17
32
1
11
28
15
INT
SDX
SDR
SCLK
C26
C91
C44
C63
C84
C64
C34
C61
C54
C55
R86
C58
R82
C39
C45
L2
36
35
C72
C71
C60
C68
C80
C66
C62
C73
C79
C82
C81
C65
C74
28
18
ANT
C6
C8
C3
C4
C9
C41
73
72
C40
C10
C7
C12
C70
C14
C19
C18
C23
C22
C16
C30
C29
C93
C92
C49
C89
R29
C17
C48
C42
R54
R55
R26
R21
R85
R85
C20
R22
C15
R53
C31
C46
C47
C47
C35
C13
C5
C11
DECT tester
CMD60
(H) (I) (J) (K) (L)
(M)
(M)
GND
V.V
OSC
Tel Simulator
AF Volt Meter
AF Generator
(N) (O)
Note:
(H) - (O) is refered to ADJUSTMENTS (BASE UNIT AND CHARGER UNIT) (P.43)
K
X
-T
C
D
42
0R
U
M
/K
X
-T
C
D
42
0R
U
S
/K
X
-A
14
2R
U
M
/K
X
-A
14
2R
U
S
46
14.2.2. Flow Solder Side View
TP13
TP15
TP8
TP7
TP11
TP106
TP9
TP1
2
4
1
5
6
TP4
TP2
TP3
TP10
TP6
TP5
B0
B4
B8
B1
GND
MODE
SCL
SD
A
A
VDD
J105
PbF
J102
J104
J103
J101
B2
CHARGE
CHARGE
Digital
Volt Meter
Volt Meter
(A)
Digital Volt Meter
(B)
Frequency
Counter
(E)
DTMF
tester
Tel
Simulator
(F) (N) (O)
(G)
Digital
Volt Meter
(C)
(P)
To PC (JIG)
Digital Volt Meter
(D) (E) (F) (G)
(H) (N) (O)
(H) (N) (O)
12
Ω
/2W
Note:
(A) - (P) is refered to ADJUSTMENTS (BASE UNIT AND CHARGER UNIT) (P.43)
K
X
-T
C
D
42
0R
U
M
/K
X
-T
C
D
42
0R
U
S
/K
X
-A
14
2R
U
M
/K
X
-A
14
2R
U
S
47
15 ADJUSTMENTS (HANDSET)
If your unit have below symptoms, adjust or confirm each item using remedy column from the table.
Symptom
Remedy
The movement of Battery Low indicator is wrong.
Make confirmation in item (A)~(C), (F)~(G)
The handset does not respond to a call from base unit.
Make adjustments in item (A)~(C), (H), (J)~(N)
The handset does not transmit or the transmit frequency is off.
Make adjustments in item (A)~(C), (H)~(K), (M)
The transmit frequency is off.
Make confirmation in item (A)~(C), (H)~(K), (M)
The transmit power output is low, and the operating distance between base unit and handset is
less than normal.
Make confirmation in item (I), (L)
The reception sensitivity of base unit is low with noise.
Make confirmation in item (L)
Does not link between base unit and handset.
Make confirmation in item (A)~(C), (H)~(N)
The reception level is high or low.
Make adjustments in item (O)
The transmit level is high or low.
Make adjustments in item (P)
* : Refer to Adjustment (P.46)
15.1. Adjustment
Please follow the items below when BBIC or EEPROM are replaced.
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.
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,
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,
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.
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 TP5(+) and TP6(-) with current limit of PSU to 200mA.
2. Confirm that the charge current is ON/OFF.
3. SWto decrease current limit of PSU to 100mA.
4. Confirm that the charge current is stable.
2. Confirm that the charge current is ON/OFF.
3. SWto 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 TP5(+) and TP6(-).
2. Execute the command "charge".
3. Confirm that the returned value is 0x00 (hex).
2. Execute the command "charge".
3. Confirm that the returned value is 0x00 (hex).
IC1,D4,L4,
L5,Q2,Q3,
R6,D2,R22,
C26,F1,R21,
R4,C33
(F)*
Battery Monitor
Confirmation
-
1. Apply 2.3V ± 0.005V between TP3(+) and TP4(-).
2. Execute the command "readbatt".
3. Confirm:
2. Execute the command "readbatt".
3. Confirm:
98 < returned value < A8 (Hex)
4. Execute the command "WRTBAT2 XX".
XX: (returned value) - 06 (Hex)
IC1,D4,L4,
L5,Q2,Q3,
R6,D2,R22,
C26,F1,R21,
R4,C33
(G) Battery low Confirmation
-
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).
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 Adjusment
TP19
1. Execute the command "conttx".
2. Adjust the frequency of TP19 executing thecommand "setfreq 00 xx (where xx
2. Adjust the frequency of TP19 executing thecommand "setfreq 00 xx (where xx
is the value)" so that the reading of the frequency counter is 10.368000MHz ±
3Hz.
IC1,L3,C57,
IC3,X1,C16,
C17
46
KX-TCD410RUM / KX-TCD410RUS / KX-TCD412RUM / KX-TCD412RUS / KX-A141RUM / KX-A141RUS / KX-A142RUM / KX-A142RUS
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