Panasonic KX-TG2511ALM Service Manual page 38

KX-TG2511AL/KX-TG2512AL/KX-TG2513AL/KX-TGA250AZ
Items
(Q) Audio Check
(R) Charging Check
(S) 2.4V Supply Confirma-
tion VDD2
9.2.2. 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.50).
Check
Point
- 1. Link with Handset which is connected to Line Simulator.
2. Set line voltage to 48V and line current to 50mA.
3. Input -45dBm(600Ω)/1kHz to MIC of Handset.
Measure the Level at Line I/F and distortion level.
4. Confirm that the level is -3.5dBm ± 2 dBm and that the distortion level is <5%
at TEL Line (600Ω Load).
5. Input -20dBm(600Ω)/1kHz to Line I/F.
Measure the Level at Receiver of Handset and distortion level
(Receive volume set to second position from minimum).
6. Confirm that the level is -24 dBm ± 2 dBm and that the distortion level is < 5%
at Receiver (150 Ω Load).
1. Connect Charge Contact 12 Ω/2 W resistor between charge+ and charge-.
-
2. Measure and confirm voltage across the resistor is 3.3 V ± 0.3 V.
VDD2 1. Confirm that the voltage between test point VDD2 and GND is 2.5V ± 0.2V.
Check
Point
- 1. Connect Charge Contact 12Ω/2 W resistor between charge+ and charge-.
2. Measure and confirm voltage across the resistor is 3.1 V ± 0.3 V.
Procedure
Procedure
38
Check or
Replace Parts
IC7, SA1, L1,
L2, D3, Q3, Q4,
R14, R15, R16,
R17, D21, Q5,
R19, R20, C14,
C56, R117,
R116, C141, R9,
C22, C23
R55, R56, D22,
D23, D24, C623,
C624
IC7, Q9, C617
Check or
Replace Parts
R1, F1