Sharp GX20 Service Manual page 98

GX20
[3] Waveforms of circuit
RF UNIT PLL_IC SERIAL COMMUNICATION
1
TCXOEN
(STAND-BY)
IC304 1Pin
2
RFON_B
(STAND-BY)
R351
(Q304 5Pin)
3
TXON_B
(Talking)
R352
(Q304 4Pin)
4
SYNTHCLK
(STAND-BY)
IC901 37Pin
All manuals and user guides at all-guides.com
CONFIDENTIAL
5
SYNTHDATA
(STAND-BY)
IC901 39Pin
6
SYNTHEN
(STAND-BY)
IC901 35Pin
7
QTXN
(Talking)
C924
(IC901 22Pin)
8
QTXP
(Talking)
C924
(IC901 23Pin)
5 – 2