Panasonic KX-FC971CX-S Service Manual page 120

KX-FC971CX-S / KX-FGA521CX-S
7.9.1. Adjustment (Cordless Handset)
Please follow the items below when BBIC or EEPROM is replaced.
Items
(R) Audio Check and
confirmation
(S) SP phone Audio
check and
confirmation
Note:
After the measuring, sock up the solder of TP.
The connection of adjustment equipment are as shown in Adjustment Standard (Cordless Handset) (P.121).
Adjustment Point
- 1. Link to BASE which is connected to Line Simulator.
2. Set line voltage to 48V and line current to 40mA.
3. Input -45dBm/1KHz to MIC and measure Line output level.
4. Confirm that the level is -8dBm ± 5dB and confirm that the distortion level is <
5% at TEL Line (600Ω Road).
5. Input -20dBm/1KHz to Line I/F and measure Receiving level at TP911 and
TP912.
6. Confirm that the level is -14dBm ± 5dB and confirm that the distortion level is
< 5% at Receiver (Volume Middle, 150Ω Road).
- 1. Link to Base Unit.
2. let ringer be sounded by pushing volume key.
(lower direction = volume low)
3. While ringing, confirm that level is -10dBm±3dB.
Procedure
120
Check or
Replace Parts
MIC ROUTE
R1025,
R1026, R940,
R942, C904,
R941, R943,
C933, C934,
R936, R937,
C929, C928,
IC900
RECEIVER
ROUTE
IC907, C972,
R908, R911,
C993, R1033,
IC900. C914,
C915
IC900
SP ROUTE
IC903, C945,
R944, R945,
C949, R946,
IC900, C940,
C941