Panasonic KX-WT115CE, Service Manual

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33
KX-WT115CE
Note:
After the measuring, suck up the solder of TP.
*:
Connections (Handset) (P.37) is required beforehand.
The connections of adjustment equipments are as shown in Adjustment Standard (Handset) (P.44).
*: It is impossible to replace IC1 and IC3.
( M )* Power RAMP Confirma-
tion
- Follow steps 1 to 3 of (H) .
4.Confirm that Power RAMP is matching.
IC1, DA801,
L809, R806,
R807,C805,
C806,
C810~CC813,
C820~C822,
C825, C826,
C859~C863,
C895~C897
( N ) Audio Check and Confir-
mation
- 1. Link to PBX which is connected to Line Simulator.
2. Set line voltage to 48 V and line current to 40 mA.
3. Input -45 dBm/1KHz to MIC and measure Line output level.
4. Confirm that the level is -8 dBm ± 2 dBm and that the distortion level is < 5% at
TEL Line (600
Ω
Load).
5. Input -20 dBm/1KHz to Line I/F and measure Receiving level at REV+ and
REV-.
6. Confirm that the level is -22 dBm ± 2 dBm and that the distortion level is < 5%
at Receiver. (vol = 2)
IC1, MIC,
C11~C14,
C17, C18,
C113, RA4,
R22, R25,
R27, R28,
R34, R11,
D21, D22,
C70, C71,
C152
( O ) SP phone Audio Check
and Confirmation
- 1. Link to PBX 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 -15 dBm ± 2 dBm and that the distortion level is < 5%.
(vol = 3)
IC1, MIC,
C11~C14,
C17, C18,
C113, RA4,
R22, R25,
R27, R28,
R34, D13,
D14, C72,
C73, L13
( P ) 3.0V Supply Confirma-
tion
3.0V 1. Confirm that the voltage between testpoint 3.0V and GND is 3.0V -0.1/+0.3V. IC1, C1, C30,
C32, R45, F1
( Q ) 4.0V Supply Confirma-
tion
4.0V 1. Confirm that the voltage between testpoint 4.0V and GND is 4.0V -0.2V. IC1, C1, C32,
R45, F1, IC4,
C56~C58, L6
Items Check
Point
Procedure Check or
Replace Parts