Troubleshooting By Symptom (Handset) - Panasonic KX-TG1711MEB Service Manual

3.2.5.

Troubleshooting by Symptom (Handset)

3.2.5.1. Check Point (Handset)
[Changed from original section "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 is required beforehand.
The connections of simulator equipment are as shown in Adjustment Standard (Handset) (P.19).
Items
(A) Battery Supply
Confirmation
(B) VDDDCDC2 Supply
Confirmation
(C)* BBIC Confirmation
(D) Charge Control Check &
Charge Current Monitor
Check
(E)* Charge Detection (OFF)
Check
(F)* Battery Monitor Check &
Adjustment (Important)
(G) Battery Low
Confirmation (Important)
Adjustment
Point
- 1. Confirm that the consumption current is < 200mA, that is, there is no short
circuit.
- 1. Confirm that the voltage between VDDDCDC2 and GND is 3.3V ± 0.3V.
- 1. BBIC Confirmation (Execute the command "getchk").
2. Confirm the returned checksum value.
Connection of checksum value and program number is shown below.
- 1. Apply 5.5V between TP5(+) and TP6(-) with current limit of PSU to 250mA.
2. Confirm that the charge current is ON/OFF.
3. SW to decrease current limit of PSU to 75mA.
4. Confirm that the charge current is stable.
- 1. Stop supplying 5.5V to TP5(+) and TP6(-).
2. Execute the command "charge".
3. Confirm that the returned value is 00 (hex).
- 1. Apply 2.3V ± 0.005V between BATTERY (+) and BATTERY (-) with DC power.
2. Execute the command "deactmac" to stabilize the value.
3. Then, execute the command "readbatt". The returned value is XX.
4. Confirm that XX is between 98 and A7.
98 < XX < A7 (Hex)
(If XX is out of range, change BBIC)
- 1. Apply 2.40V between BATTERY (+) and BATTERY (-).
2. Confirm that there is no Speaker sound (Battery low alarm).
3. Apply 2.2V between BATTERY(+) and BATTERY(-).
4. Confirm that there is Speaker sound (Battery low alarm).
Procedure
ex.) checksum value program number
011B
15
DCN2EA
Check or
Replace Parts
R102, C144,
F1, C140,
L103, IC101
C141, R201,
C102, C120,
C131
C803, C825,
C110, C802,
C804, C148,
D107, C109,
R121, C186,
IC103
IC103, C140,
L103, R107,
IC101, C141,
R201, C102,
C120
IC103, X101,
C122, C123,
C127
C101, C160,
R101, C161,
Q101, Q102,
C142, R108,
IC103
C101, C160,
R101, C161,
Q101, Q102,
C142, R108,
IC103
IC103, D107,
C148, C109
F1, R121,
C186
IC103, D107,
F1, C148
C109, R121,
C186
R114, D104
Q104, Q105,
RA102, BZ1