Panasonic KX-TG7207UAJ / KX-TG7207UAM / KX-TG7207UAS / KX-TG7207UAT / KX-TG7208UAM / KX-TG7208UAS / KX-TG7208UAT / KX-TGA720UAJ / KX-TGA720UAM / KX-TGA720UAS / KX-TGA720UAT Service Manual ▷ View online
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KX-TG7207UA/KX-TG7208UA/KX-TGA720UA
9.1.5.
Check Handset Transmission
Cross Reference:
Signal Route (P.13)
9.1.6.
Check Handset Reception
Cross Reference:
How to Check the Handset Speaker or Receiver (P.61).
Signal Route (P.13)
Signal Route (P.13)
9.1.7.
Check Caller ID
Cross Reference:
Signal Route (P.13)
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KX-TG7207UA/KX-TG7208UA/KX-TGA720UA
9.1.8.
Bell Reception
9.1.8.1.
Base Unit
9.1.8.2.
Handset
Cross Reference:
Telephone Line Interface (P.9)
Check Link (P.30)
How to Check the Handset Speaker or Receiver (P.61)
Check Link (P.30)
How to Check the Handset Speaker or Receiver (P.61)
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KX-TG7207UA/KX-TG7208UA/KX-TGA720UA
9.2.
Troubleshooting by Symptom (Base Unit and Charger Unit)
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.
(*2) Refer to Check Point (Base Unit) (P.39)
level in detail.
(*2) Refer to Check Point (Base Unit) (P.39)
9.2.1.
Check Point (Base Unit)
Please follow the items below when BBIC or EEPROM is replaced.
Note:
After the measuring, suck up the solder of TP.
*: PC Setting (P.51) is required beforehand.
The connections of simulator equipment are as shown in Adjustment Standard (Base Unit) (P.53).
*: PC Setting (P.51) is required beforehand.
The connections of simulator equipment are as shown in Adjustment Standard (Base Unit) (P.53).
Items
Check
Point
Procedure
Check or
Replace Parts
(A) 3.3 V Supply Confirma-
tion
VDD3
1. Confirm that the voltage between test point VDD3 and GND is 3.3 V ± 0.2 V.
IC1, C31, C32,
R38, R39, C36,
C37
(B) 2.5 V Supply Confirma-
tion
VDD2
1. Confirm that the voltage between test point VDD2 and GND is 2.5 V ± 0.2 V.
Q9, C70, C71
(C) 1.8 V Supply Confirma-
tion
VDD1
1. Confirm that the voltage between test point VDD1 and GND is 1.8 V ± 0.1 V.
Q8, R72, D12,
C64, C68
(D)*
BBIC Confirmation
-
1. BBIC Confirmation (Execute the command “getchk”).
2. Confirm the returned checksum value.
2. Confirm the returned checksum value.
Connection of checksum value and program number is shown below.
IC7, R73, C62,
C63, X1, C72,
R75~R81, R62,
R63
(E)* EEPROM Confirmation
-
1. EEP-ROM Confirmation (Execute the command “ChkTG7200XXrevYY.bat”).
XX: country code
YY: revision number
YY: revision number
2. Confirm the returned checksum value.
3. The checksum is displayed in the last output line.
3. The checksum is displayed in the last output line.
Note:
“XX”, “YY”, and “checksum” vary depending on the country version. You can find
them in the batch file, PQZZ- mentioned in JIG and PC (P.51).
them in the batch file, PQZZ- mentioned in JIG and PC (P.51).
IC5, C51, R62,
R63, C50, Q25,
R134, R141,
C160
(F)* BBIC Clock Adjustment
CLK
1. Check X’tal Frequency. (10.368 MHz ± 100 Hz).
2. If the frequency is not 10.368MHz ± 100Hz, adjust the frequency of CLK exe-
2. If the frequency is not 10.368MHz ± 100Hz, adjust the frequency of CLK exe-
cuting the command “setfreq xx (where xx is the value)” so that the reading of
the frequency counter is 10.368000 MHz ± 20 Hz.
the frequency counter is 10.368000 MHz ± 20 Hz.
IC10, C111,
C112, X1, R73,
C62, C63
(G)* Hookswitch Check with
DC Characteristics
-
1. Connect CN1 (Telephone Socket) to Tel-simulator which is connected with
600
Ω.
2. Set line voltage to 48 V and line current to 40mA at off-hook condition of nor-
mal telephone.
3. Execute the command “hookoff”
4. Confirm that the line current is 40 mA ± 5 mA.
5. Execute the command “hookon”.
6. Confirm that the line current is less than + 0.8 mA.
4. Confirm that the line current is 40 mA ± 5 mA.
5. Execute the command “hookon”.
6. Confirm that the line current is less than + 0.8 mA.
L1, L2, Q3, R14,
R15, Q4, R16,
R17, IC7, D3
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KX-TG7207UA/KX-TG7208UA/KX-TGA720UA
(H) DTMF Generator Check
-
1. Connect CN1 (Telephone Socket) to DTMF tester. (Road=600
Ω)
2. Link Handset and push dial key.
3. Confirm DTMF character.
4. Confirm that the high Group is -3 ± 2 dBm.
5. Confirm that the low Group is -6 ± 2 dBm.
3. Confirm DTMF character.
4. Confirm that the high Group is -3 ± 2 dBm.
5. Confirm that the low Group is -6 ± 2 dBm.
IC7, R116,
C141, R29, C22,
C23, R18~R24,
C14~C17, Q5,
D4
(I)* Transmitted Power Con-
firmation
-
Remove the Antenna before starting step from 1 to 7.
1. Configure the DECT tester (CMD60) as follows;
<Setting>
• Short A_1 and GND.
• Test mode: FP
• Traffic Carrier: 5
• Traffic Slot: 4
• Mode: Loopback
• PMID: 00000
• RF LEVEL = -70 dBm.
• Test mode: FP
• Traffic Carrier: 5
• Traffic Slot: 4
• Mode: Loopback
• PMID: 00000
• RF LEVEL = -70 dBm.
2. Execute the command “testmode”.
3. Execute the command “sendchar dmv 2 2”.
4. Check that “Signalling Status” has been set to “Locked”, then press “ACCEPT
3. Execute the command “sendchar dmv 2 2”.
4. Check that “Signalling Status” has been set to “Locked”, then press “ACCEPT
RFPI”.
5. Initiate connection from Dect tester (“set up connect”)
6. Execute the command “ANT1”.
7. Confirm that the NTP value at ANT is 20.7 dBm ~ 25.7 dBm.
6. Execute the command “ANT1”.
7. Confirm that the NTP value at ANT is 20.7 dBm ~ 25.7 dBm.
IC7, IC10, L7,
C117, C118,
C124, C125,
R106, R109,
R106, R109,
DA1, C112,
R111, C126,
C127, R112,
R125, C128
(J)* Modulation Check and
Adjustment
-
Follow steps 1 to 6 of (I).
7.Confirm that the B-Field Modulation is +220 ~ +403/-220 ~ -403 kHz/div &
Modulated width 670 kHz using data type Fig31.
8.Adjust the B-Field Modulation if required. (Execute the command “readmod”
and “wrtmod xx”, where xx is the value.)
Modulated width 670 kHz using data type Fig31.
8.Adjust the B-Field Modulation if required. (Execute the command “readmod”
and “wrtmod xx”, where xx is the value.)
IC7, IC10, L7,
C117, C118,
C124, C125,
R106, R109,
R106, R109,
DA1, C112,
R111, C126,
C127, R112,
R125, C128
(K)* Frequency Offset Check
-
Follow steps 1 to 6 of (I).
7.Confirm that the frequency offset is < ± 50 kHz.
IC7, IC10, L7,
C117, C118,
C124, C125,
R106, R109,
R106, R109,
DA1, C112,
R111, C126,
C127, R112,
R125, C128
(L)* Frequency Drift Confir-
mation
-
Follow steps 1 to 6 of (I).
7.Confirm that the frequency drift is < ± 30 kHz/ms.
IC7, IC10, L7,
C117, C118,
C124, C125,
R106, R109,
R106, R109,
DA1, C112,
R111, C126,
C127, R112,
R125, C128
(M)*
Sensitivity Receiver
Confirmation
-
Follow steps 1 to 6 of (I).
7.Set DECT tester power to -90 dBm.
8.Confirm that the BER is < 1000 ppm.
8.Confirm that the BER is < 1000 ppm.
IC7, IC10, L7,
C117, C118,
C124, C125,
R106, R109,
R106, R109,
DA1, C112,
R111, C126,
C127, R112,
R125, C128
(N)*
Timing Confirmation
-
Follow steps 1 to 6 of (I).
7.Confirm that the Timing accuracy is < ± 5.0 ppm.
IC7, IC10, L7,
C117, C118,
C124, C125,
R106, R109,
R106, R109,
DA1, C112,
R111, C126,
C127, R112,
R125, C128
(O)* Power RAMP Confirma-
tion
-
Follow steps 1 to 6 of (I).
7.Confirm that Power RAMP is matching.
IC7, IC10, L7,
C117, C118,
C124, C125,
R106, R109,
R106, R109,
DA1, C112,
R111, C126,
C127, R112,
R125, C128
Items
Check
Point
Procedure
Check or
Replace Parts
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