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KX-TG5511CA/KX-TGA550RU/KX-TGA551RU
9.3.
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.
(*2) Refer to Check Point (Handset) (P.40)
level in detail.
(*2) Refer to Check Point (Handset) (P.40)
9.3.1.
Check Point (Handset)
Please follow the items below when BBIC or EEPROM is replaced.
Note:
After the measuring, suck up the solder of TP.
*: Connections (P.52) is required beforehand.
The connections of adjustment equipment are as shown in Adjustment Standard (Handset) (P.54).
*: Connections (P.52) is required beforehand.
The connections of adjustment equipment are as shown in Adjustment Standard (Handset) (P.54).
Items
Check
Point
Procedure
Check or
Replace Parts
(A)* 1.8 V Supply Adjustment
VDD1
1. Confirm that the voltage between test point VDD1 and GND is 1.8 V ± 0.02 V.
2. Execute the command “VDD”, then check the current value.
3. Adjust the 1.8V voltage of VDD1 executing command “VDD XX“(XX is the
2. Execute the command “VDD”, then check the current value.
3. Adjust the 1.8V voltage of VDD1 executing command “VDD XX“(XX is the
value).
IC1, Q2, C48,
D1, C1, C44,
R45, C40,
C45, F1
(B)*
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.
IC1, X1, RA61,
R64, R66
(C)* EEP-ROM 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).
IC1, IC3,
RA40, C172
(D) Charge Control Check &
Charge Current Monitor
Check
-
1. Apply 3.5 V between CHG(+) and CHG(-) with DC power supply and set
current limit to 250 mA.
Confirm the indication of “charging” on LCD.
Confirm the indication of “charging” on LCD.
2. Confirm that the current limit LED of DC power supply is ON/OFF.
Confirm it after waiting over 1 minute at least.
3. Decrease current limit of DC power supply to 100 mA.
4. Confirm that the current limit LED of DC power supply is stable. (Current limiter
4. Confirm that the current limit LED of DC power supply is stable. (Current limiter
is ON.)
(If charge control cannot be confirmed by this procedure, please use battery to
handset power supply and try again.)
handset power supply and try again.)
IC1, Q4 Q9,
D7, R6, R7,
F1, C1, R2,
R30, R31, R8,
R45
(E)* Charge Detection (OFF)
Check
-
1. Stop supplying 3.5 V to CHG (+) and CHG (-).
2. Confirm the indication of “charging” has been cleared.
2. Confirm the indication of “charging” has been cleared.
IC1, Q4 Q9,
D7, R6, R7,
F1, C1, R2,
R30, R31, R8,
R45
You have DECT Tester.
(Model Number : CMD60)
Check item (A)-(D), (E)-(G).
Check item (A)-(D), (E)-(G).
Check item (A)-(C), (H), (O).
Check item (A)-(C), (H)-(M), (O).
-
Check item (I)-(N).
Check item (A)-(C), (H).
Check item (A)-(C), (I)-(N).
Check item (O).
Check item (O).
Check item (P).
Check item (P).
Remedy (*2)
Symptom
You don't have DECT Tester.
Battery strength is not indicated correctly by Battery icon.
You cannot hear the caller's voice.
You cannot use handset a little away from base unit
even if the handset is within range of the base unit.
even if the handset is within range of the base unit.
Does not link between base unit and handset.
The Audio level is high or low.
The SP-Phone level is high or low.
checksum value
program number
ex.)
E74A
DBS2RN
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