Read Panasonic KX-UT248RU / KX-UT248RU-B (serv.man3) Service Manual online
10
KX-UT248RU/KX-UT248RU-B
3. Headset Call
Transmitting signal is input from headset microphone and amplified by IC503
→ input to IC503-pin B15 → A/D conversion,
Gain adjustment by a built-in DSP of IC503.
Receiving signal input from IP Line
Receiving signal input from IP Line
→ Gain adjustment and D/A conversion by DSP of IC503 → output from IC503-pin D14 →
output to headset speaker.
R166
MICBIAS2
AG
R165
HESMIC2
HESSPOUT2
C166
L105
C165
AG
C160
AG
R146
R528
R135
C150
CN101 CN201
3
5
C147
AG
IC503
BBIC
R138
B15
D14
C210
C207
C208
JK202
1
4
2
3
5
C213
C211
D206
21
D204
21
D205
21
L206
L207
L208
10
12
AG
AG
C214
R215
HEADGND
ASIC
IC204
HEADGND
HEADGND
HEADGND
HEADGND
L210
AG
HEADGND
C524
DG
C526
DG
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