52
KX-TG8421E/KX-TG8422E/KX-TG8423E/KX-TG8424E/KX-TGA840E
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.52)
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.
*:
PC Setting
(P.65) is required beforehand.
The connections of adjustment equipments are as shown in
Adjustment Standard (Handset)
(P.67).
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-TG8421EB
Страница 2: ...2 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E ...
Страница 14: ...14 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E 4 6 Signal Route ...
Страница 15: ...15 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E ...
Страница 24: ...24 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E 7 5 Troubleshooting ...
Страница 25: ...25 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E ...
Страница 26: ...26 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E ...
Страница 27: ...27 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E ...
Страница 29: ...29 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E 8 Service Mode 8 1 Engineering Mode 8 1 1 Base Unit ...
Страница 31: ...31 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E 8 1 2 Handset ...
Страница 40: ...40 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E Cross Reference Check Point Base Unit P 48 ...
Страница 42: ...42 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E Cross Reference Check Point Handset P 52 ...
Страница 57: ...57 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E ...
Страница 58: ...58 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E 10 1 2 Handset ...
Страница 59: ...59 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E 10 1 3 Charger Unit ...
Страница 60: ...60 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E 10 2 How to Replace the Handset LCD ...
Страница 79: ...79 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E 1 Put the shield case 2 Solder the surroundings ...
Страница 81: ...81 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E Memo ...
Страница 83: ...83 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E Memo ...
Страница 87: ...87 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E Memo ...
Страница 99: ...99 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E 15 3 Cabinet and Electrical Parts Charger Unit ...
Страница 101: ...101 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E 15 4 2 KX TG8422EB EM EN ...
Страница 102: ...102 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E 15 4 3 KX TG8423EB EM EN ...
Страница 103: ...103 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E 15 4 4 KX TG8424EB EM EN ...
Страница 104: ...104 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E 15 4 5 KX TGA840EB EM EN ...