Sharp A260 Service Manual - Page 40

UX-A260U [Signals for status recognition according to input signals] Signal Name RHS CI Function H:The handset is in the on-hook state. L: The handset is in the off-hook state. Incoming call (CI) detection signal [Other signals] Signal Name TEL IN SPOUT TXOUT RXIN TELOUT Function Receiving signal from line or modem Speaker output signal Transmission (DTMF) analog signal output from modem Reception (DTMF, others) analog signal input into modem Voice input to MODEM from handset. NO Signal Name (CNLIUA) 1 RHS- 2 DG 3 +24VL 4 MICMUTE 5 TELIN 6 TELMUTE 7 RXIN NO Signal Name (CNLIUA) 8 TXOUT 9 CML 10 PIN 11 FILM 12 CI- 13 HS- 14 TELOUT (Example: SENDING/RECEIVING) LINE CML H L CI DETECTOR PC2A TEL/LIU PWB IC101-A TXOUT RXIN IC101-B RX TX HANDSET Q101 TEL MUTE (H:MUTE) MIC MUTE (H:MUTE) Q102 IC101-D TEL IN IC101-C SPEAKER IC7 SP MUTE (H:MUTE) : FAX SENDING/RECEIVING CONTROL PWB SIGTX SIGRX Q105 MODEM BLOCK (20438 I/A) SPKRP MICP LINEIN MIC ENABLE SP OUT ENABLE MIC /LINE SELECT RTLOOP 0,1 0,0 1,0 1,1 LPF LINE IN ENABLE 0,20,25,30dB Q104 IC5 +24VL DG SPOUT BZOUT1 LINE OUT DTMFMUTE RCVOL SP MUTE TEL MUTE CI CML MIC MUTE VOL-A VOL-B VOL-C LINE OUT ENABLE MUTE,0,-6,-12dB LINESEL 1,1 0,0 1,0 IC3 SCE214V FAX CONTROLLER Fig. 6 0,6dB DAC SIN ADC 0,+4dB SOUT 5 - 12 manuals4you.com