Panasonic KX-TCD420GS Service Manual page 50

Items
Adjustment
(N) Receive Audio
* Check and
Adjustment
Point
1. Configure the DECT tester (CMD60) as follows;
ANT
<Setting>
J2
-Test mode: FP
-Mode: Normal
-PMID: 0000
2. Execute the command "testmode".
3. Initiate connection from DECT tester.
4. Execute the command "hookoff".
5. Execute the command "openau".
6. Connect J2 (Telephone Socket) to Tel-simulator which is connected with 600
7. Set line voltage to 48V and line current to 40mA.
8. Connect DECT tester to Tel-simulator.
9. Input audio signal (200mVrms/1kHz tone) to Tel-simulator.
<DECT tester setting>
-Scramble: On
-AF Gen to ADPCM: Off
-AF Meter Input: ADPCM
-AF Gen Frequency: 1000Hz
-AF Gen Level: 200mVrms
10. Confirm hearing tone: 360mVrms ± 60mVrms
11. Adjust audio level if required. (Make sure current value using "getmicgain". And then
execute the command "setmicgain xx", where xx is the value.)
12. Confirm that the B-field audio distortion with DECT tester is < 5 %.
Procedure*
46
Check
Replac
Parts
IC6,IC4
C57,C61
C77,C78
C68,C69
.
R80,C63
R83,R84
L3,C79,C
C66,D10
R20,C14
R21,R22
R85,C15
R51,C92
C32,Q2,
R13,Q4,
R15,D6
C7,JM