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KX-TG6811UAB/KX-TG6811UAM/KX-TG6812UAB/KX-TG6821UAB/KX-TGA681RUB/KX-TGA681RUM
9.2.
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.
(*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 or FLASH is replaced.
Note:
After the measuring, suck up the solder of TP.
*: The Setting Method of JIG (Base Unit) (P.52) is required beforehand.
The connections of simulator equipment are as shown in Adjustment Standard (Base Unit) (P.54).
*: The Setting Method of JIG (Base Unit) (P.52) is required beforehand.
The connections of simulator equipment are as shown in Adjustment Standard (Base Unit) (P.54).
Symptom
Remedy (*2)
You don’t have DECT Tester.
You have DECT Tester.
(Model Number: CMD60)
You cannot dial.
Check item (A) - (G).
Check item (A) - (G), (H) - (L).
You cannot hear the caller’s voice.
Check item (A) - (E), (M).
Check item (A) - (E), (H) - (L), (M).
You cannot use the handset a little away from base unit even if the
handset is within range of the base unit.
handset is within range of the base unit.
-
Check item (H) - (L).
The acoustic transmit level is high or low.
Check item (M).
Check item (M).
The acoustic reception level is high or low.
Check item (M).
Check item (M).
Base unit and handset do not link to each other.
Check item (A) - (G).
Check item (A) - (L).
The unit cannot charge.
Check item (N).
Check item (N).
TAM does not work. (for KX-TG6821 only)
Check item (O).
Check item (O).
Items
Check
Point
Procedure
Check or
Replace Parts
(A)
3.0 V Supply
Confirmation
Confirmation
VBAT
1. Confirm that the voltage between test point VBAT and GND is 3.0 V ± 0.2 V.
IC302, C341,
R321, R322,
R323
(B)
3.0 V Supply
Confirmation
Confirmation
+3.0V
1. Confirm that the voltage between test point +3.0V and GND is 3.0 V ± 0.02 V.
2. Adjust the 3.0 V voltage of +3.0V executing command “VDA“.
2. Adjust the 3.0 V voltage of +3.0V executing command “VDA“.
IC501, C503
(C)*
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.
IC501, X501
(D)* EEPROM Confirmation
-
1. EEP-ROM Confirmation (Execute the command "sendchar EPV").
2. Confirm the returned Value. (Value for reference is written at "EEPROM C/
2. Confirm the returned Value. (Value for reference is written at "EEPROM C/
SUM” in Software_Version_Table.xls).
IC501, IC611,
C611, RA611
(E)* BBIC Clock Adjustment
CKM
1. Input Command “ sendchar sfr”, then you can confirm the current value.
2. Check X’tal Frequency. (13.824 MHz ± 100 Hz).
3. If the frequency is not 13.824 MHz ± 100Hz, adjust the frequency of CKM
2. Check X’tal Frequency. (13.824 MHz ± 100 Hz).
3. If the frequency is not 13.824 MHz ± 100Hz, adjust the frequency of CKM
executing the command “sendchar sfr xx xx (where xx is the value)” so that
the reading of the frequency counter is 13.824000 MHz ± 7 Hz.
the reading of the frequency counter is 13.824000 MHz ± 7 Hz.
IC501, X501,
C508, C509
(F)* Hookswitch Check with
DC Characteristics
-
1. Connect 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
normal 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.
P101, D101,
Q141, Q161,
Q142, D141,
Q142, D141,
R141~R145,
R159~R169
(G) DTMF Generator Check
-
1. Connect Telephone Socket to DTMF tester. (Load=600
Ω)
2. Link Handset and push dial key.
3. Confirm DTMF character.
4. Confirm that the high Group is -8.0 dBm ± 2.0 dB.
5. Confirm that the low Group is -10.5 dBm ± 2.0 dB.
3. Confirm DTMF character.
4. Confirm that the high Group is -8.0 dBm ± 2.0 dB.
5. Confirm that the low Group is -10.5 dBm ± 2.0 dB.
IC501, L505,
C184, D141
checksum value
66D6
program number
DD81EN
ex.)
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