Panasonic KX-MB2061CXB Service Manual page 205

Items
(P) SP phone Audio Check
and Confirmation
(Q) Charge Pump 3.0V Sup-
ply Confirmation
(R) Charge Pump 4.0V Sup-
ply Confirmation
12.3.18. Troubleshooting by Symptom (Charger Unit)
12.3.18.1. Check Point (Charger Unit)
Items
(A) Charging Check
Note:
After the measuring, suck up the solder of TP.
The connection of adjustment equipment is as shown in Adjustment Standard (Charger Unit) (P.274).
Check
Point
- 1. Link to Base which is connected to Line Simulator.
2. Set line voltage to 48 V and line current to 40 mA.
3. Set the handset off-hook using SP-Phone key.
4. Input -25 dBm/1KHz to Line I/F and measure Receiving level at SP+ and SP-.
5. Confirm that the level is -9.5 dBm ± 2 dBm and that the distortion level is < 5%.
(vol = 3)
CP3.0V 1. Confirm that the voltage between testpoint CP3.0V and GND is 3.0V -0.1/
+0.3V.
CP4.0V 1. Confirm that the voltage between testpoint CP4.0V and GND is 4.0V -0.2V.
Check
Point
- 1. Connect Charge Contact 10Ω/2 W resistor between charge+ and charge-.
2. Measure and confirm voltage across the resistor is 3.1 V ± 0.3 V.
Procedure
Procedure
205
KX-MB2061CXB/KX-MB2061CX2/KX-MB2062CXB
Check or
Replace Parts
IC1, C12, C73,
D13, D14,
R152, R73,
R74, RA2,
MIC, C11,
C13, RA4,
R27, R28,
R208, R209,
C96, C97,
R215, C72
C52, C53, C49
C50, C51
Check or
Replace Parts
R1, F1