Troubleshooting By Symptom (Base Unit And Charger Unit) - Panasonic KX-TG8041RUM Service Manual

KX-TG8041RU/KX-TGA800RU
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.
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.36)
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.49) is required beforehand.
The connections of simulator equipments are as shown in Adjustment Standard (Base Unit) (P.51).
Items
(A) 3.0 V Supply Confirma-
tion
(B) 1.8 V Supply Confirma-
tion
(C) Charge Pump
2.5 V Supply Confirma-
tion
(D) Charge Pump
3.0 V Supply Confirma-
tion
(E)* BBIC Confirmation
(F)* EEPROM Confirmation
Check
Point
VDD3 1. Confirm that the voltage between test point VDD3 and GND is 3.0 V ± 0.2 V.
VDD1 1. Confirm that the voltage between test point VDD1 and GND is 1.8 V ± 0.1 V.
VDD5 1. Confirm that the voltage between test point VDD5 and GND is 2.5 V -0.1/+0.3
V.
VDD4 1. Confirm that the voltage between test point VDD4 and GND is 3.0 V ± 0.2 V.
- 1. BBIC Confirmation (Execute the command "getchk").
2. Confirm the returned checksum value.
Connection of checksum value and program number is shown below.
- 1. EEP-ROM Confirmation (Execute the command "ChkTG7340XXrevYY.bat").
XX: country code
YY: revision number
2. Confirm the returned checksum value.
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 The Setting Method of JIG (Base
Unit) (P.49).
Procedure
36
Check or
Replace Parts
IC1, C50, C51,
C52, R50, R51,
C53, F1, D1
Q8, C55, C61,
C64, IC7
IC7, C404
IC7, C422, C425
IC7, X1, R76,
R69, R70
IC7, RA401,
C401, R405,
IC401