Panasonic KX-WT115CE, Service Manual

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KX-WT115CE
9.2. Troubleshooting by Symptom (Charger Unit)
9.2.1. Check Point (Charger Unit)
Note:
After the measuring, suck up the solder of TP.
The connection of adjustment equipment is as shown in
Adjustment Standard (Charger Unit) (P.43).
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.31)
9.3.1. Check Point (Handset)
Items Check
Point
Procedure Check or
Replace Parts
( A ) Charging Check - 1. Connect Charge Contact 12
Ω
/2 W resistor between and charge-.
2. Measure and confirm voltage across the resistor is 3.1 V ± 0.3 V.
R1, F1
Items Check
Point
Procedure Check or
Replace Parts
( A )* 1.8 V Supply Adjustment VDDC 1. Confirm that the voltage between test point VDDC 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 VDDC executing command “VDD XX“(XX is the
value).
IC1, C1, C32,
C51, R45, F1
( B )* BBIC Confirmation - 1. BBIC Confirmation (Execute the command “SLF” and “VER”).
2. Confirm the returned checksum value. IC1, X1, R64
( C )* EEP-ROM Confirmation - 1. EEP-ROM Confirmation (Execute the command "EPV").
2. Confirm the returned Value. IC1, IC3, RA5,
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, F1, C1,
R3-7 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, F1, C1,
R3-7, R45