51
KX-TG6421HGT/KX-TGA641FXT
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.
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.51)
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.64) is required beforehand.
The connections of adjustment equipments are as shown in
Adjustment Standard (Handset)
(P.66).
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
value).
IC1, Q2, C48,
D1, C1, C44,
R12, R45,
C40, C45, F1
(
B
)*
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.
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/
SUM" in Software_Version_Table.xls).
IC1, IC3,
R40~R42,
C172
(
D
) Charge Control Check &
Charge Current Monitor
Check
-
1. Apply 3.5 V between CHG(+) and CHG(-) with DC power supply and set cur-
rent limit to 250 mA.
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
is ON.)
(If charge control cannot be confirmed by this procedure, please use battery to hand-
set 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.
IC1, Q4 Q9,
D7, R6, R7,
F1, C1, R2,
R30, R31, R8,
R45
Содержание KX-TGA641FXT
Страница 2: ...2 KX TG6421HGT KX TGA641FXT ...
Страница 14: ...14 KX TG6421HGT KX TGA641FXT 4 6 Signal Route ...
Страница 15: ...15 KX TG6421HGT KX TGA641FXT ...
Страница 16: ...16 KX TG6421HGT KX TGA641FXT 5 Location of Controls and Components 5 1 Controls 5 1 1 Base Unit 5 1 2 Handset ...
Страница 22: ...22 KX TG6421HGT KX TGA641FXT 7 4 Dialling mode 7 5 Error Messages ...
Страница 23: ...23 KX TG6421HGT KX TGA641FXT 7 6 Troubleshooting ...
Страница 24: ...24 KX TG6421HGT KX TGA641FXT ...
Страница 25: ...25 KX TG6421HGT KX TGA641FXT ...
Страница 26: ...26 KX TG6421HGT KX TGA641FXT ...
Страница 27: ...27 KX TG6421HGT KX TGA641FXT 7 7 For Service Hint Cross Reference Battery Charge P 17 ...
Страница 28: ...28 KX TG6421HGT KX TGA641FXT 8 Service Mode 8 1 Engineering Mode 8 1 1 Base Unit ...
Страница 30: ...30 KX TG6421HGT KX TGA641FXT 8 1 2 Handset ...
Страница 39: ...39 KX TG6421HGT KX TGA641FXT Cross Reference Check Point Base Unit P 47 ...
Страница 41: ...41 KX TG6421HGT KX TGA641FXT Cross Reference Check Point Handset P 51 ...
Страница 56: ...56 KX TG6421HGT KX TGA641FXT ...
Страница 57: ...57 KX TG6421HGT KX TGA641FXT 10 1 2 Handset ...
Страница 58: ...58 KX TG6421HGT KX TGA641FXT 10 1 3 Charger Unit ...
Страница 59: ...59 KX TG6421HGT KX TGA641FXT 10 2 How to Replace the Handset LCD ...
Страница 80: ...80 KX TG6421HGT KX TGA641FXT Memo ...
Страница 85: ...85 KX TG6421HGT KX TGA641FXT Memo ...
Страница 92: ...92 KX TG6421HGT KX TGA641FXT Memo ...
Страница 98: ...98 KX TG6421HGT KX TGA641FXT 15 3 Cabinet and Electrical Parts Charger Unit ...
Страница 99: ...99 KX TG6421HGT KX TGA641FXT 15 4 Accessories and Packing Materials 15 4 1 KX TG6421HGT ...
Страница 100: ...100 KX TG6421HGT KX TGA641FXT 15 4 2 KX TGA641FXT ...