Panasonic KX-TCD400RUB / KX-TCD400RUC / KX-TCD400RUF / KX-A140RUB / KX-A140RUC / KX-A140RUF Service Manual ▷ View online
14.2.2. Flow Solder Side View
TP89
TP188
TP91
TP1
TP97
TP50
TP45
TP40
TP5
1
2
4
6
5
TP90
TP101
TP2
TP3
TP39
TP187
GND
VBACK
SCL
SDA
+2.65V
TP82
TP84
CHARGE+
J105
J102
J104
J103
J101
CHARGE
PbF
Frequency
Counter
(E)
Digital
Volt Meter
(C)
(P)
To PC (JIG)
Digital
Volt Meter
Volt Meter
Digital Volt Meter
(D) (E) (F) (G)
(H) (N) (O)
(H) (N) (O)
(A)
Digital
Volt Meter
(B)
12
Ω
/2W
DTMF
tester
Tel
Simulator
(F), (N), (O)
(G)
Note:
(A) - (P) is refered to ADJUSTMENTS (BASE UNIT) (P.37)
K
X
-T
C
D
40
0R
U
B
/K
X
-T
C
D
40
0R
U
C
/K
X
-T
C
D
40
0R
U
F
/K
X
-A
14
0R
U
B
/K
X
-A
14
0R
U
C
/K
X
-A
14
0R
U
F
41
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.42)
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. SW to 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. 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 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
42
KX-TCD400RUB / KX-TCD400RUC / KX-TCD400RUF / KX-A140RUB / KX-A140RUC / KX-A140RUF
Items
Adjustment
Point
Procedure*
Check or
Replace Parts
(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
(I)*
Transmitted Power
Confirmation
TP15
Remove the Antenna before starting step from 1 to 5.
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
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) Modulatoin Check and
Adjusment
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.
6. Adjust the B-Field Modulation if required. (Execute the command "Readmod"
6. Adjust the B-Field Modulation if required. (Execute the command "Readmod"
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 < ± 40kHz.
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.
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 < ± 10ppm.
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 that the returned value is 0x34 ± A (hex).
6. Execute the command "readrssi"
7. Confirm that the returned value is 0x34 ± A (hex).
IC1,IC3,C54,
C66,C60,L3,
C57,C55,C56,
C62,R23,R24,
C63,C64,C65,
R18
43
KX-TCD400RUB / KX-TCD400RUC / KX-TCD400RUF / KX-A140RUB / KX-A140RUC / KX-A140RUF
Items
Adjustment
Point
Procedure*
Check or
Replace Parts
(O)* Receive Audio Check
and Confirmation
TP15
1. Configure the DECT tester (CMD60) as follows;
<Setting>
·
Test mode: PP
·
Mode: Nomal
·
RFPI: 0102030405
2. Execute the command "testmode".
3. Execute the command "regcmd60"
4. Initiate connection from DECT tester.
5. Execute the command "openaudio".
6. Confirm that the value of EEPROM address "F3F" is "02". (If the value is not
3. Execute the command "regcmd60"
4. Initiate connection from DECT tester.
5. Execute the command "openaudio".
6. Confirm that the value of EEPROM address "F3F" is "02". (If the value is not
"02" (by User), set "02" and power off and power on, and return to clause 2.)
7. Input audio signal (50mVrms/1kHz tone) from DECT tester.
<DECT tester setting>
·
Scramble: On
·
AF Gen to ADPCM: On
·
AF Meter Input: AF Voltm
·
AF Gen Frequency: 1000Hz
·
AF Gen Level: 50mVrms
8. Confirm hearing tone: 300mV ± 250mV (Just check Audio path)
9. Confirm that the audio distortion with DECT tester is < 5 %.
9. Confirm that the audio distortion with DECT tester is < 5 %.
IC1,C12,C31,
R17,R20,C10,
C11,D7,D6,
IC3,C54,C66,
C60,L3,C57,
C55,C56,C62,
R23,R24,C63,
C64,C65,R18
(P) Transmit Audio Check
and Confirmation
TP15
1. Configure the DECT tester (CMD60) as follows;
<Setting>
·
Test mode: FP
·
Mode: Normal
·
RFPI: 0102030405
2. Execute the command "testmode".
3. Execute the command "regcmd60".
4. Initiate connection from DECT tester.
5. Execute the command "openaudio".
6. Confirm that the value of EEPROM address "F3F" is "02". (If the value is not
3. Execute the command "regcmd60".
4. Initiate connection from DECT tester.
5. Execute the command "openaudio".
6. Confirm that the value of EEPROM address "F3F" is "02". (If the value is not
"02" (by User), set "02" and power off and power on, and return to clause 2.)
7. Input audio signal (30mVrms/1kHz tone) to DECT tester.
<DECT tester setting>
·
Scramble: On
·
AF Gen to ADPCM: Off
·
AF Meter Input: ADPCM
·
AF Gen Frequency: 1000Hz
·
AF Gen Level: 30mVrms
8. Confirm hearing tone: 300mV ± 250mV (Just check Audio path)
9. Confirm that the audio distortion with DECT tester is < 5 %.
9. Confirm that the audio distortion with DECT tester is < 5 %.
IC1,C8,R7,
R8,C6,C7,
C5,R5,R1,
C4,IC3,C54,
C66,C60,L3,
C57,C55,C56,
C62,R23,R24,
C63,C64,C65,
R18
Note:
After the measuring, sock up the solder of TP.
* : PC Setting (P.36) is required beforehand.
The connection of adjustment equipment are as shown in Adjustment Standard (Handset) (P.45).
* : PC Setting (P.36) is required beforehand.
The connection of adjustment equipment are as shown in Adjustment Standard (Handset) (P.45).
44
KX-TCD400RUB / KX-TCD400RUC / KX-TCD400RUF / KX-A140RUB / KX-A140RUC / KX-A140RUF
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