24
Dial Pulse Generator
The circuit consists of the CML relay, PLS relay and their peripheral circuits. This circuit generates dial
pulses. The CPU on the SC PC Board controls all dial pulse generation sequences. It turns relay CML
and PLS ON and OFF through the DZZSP58025 (IC80). The status of the relays during dialing is shown
below. When the absence of the terminating message is confirmed by the Off-Hook detector, the CPU
turns CML relay ON to develop loop status (DC loop). After a few seconds, the CPU turns the PLS relay
On and Off to generate dial pulses, making and breaking the loop.
DTMF Tone Generator
The circuit is incorporated in the MODEM on the SC PC Board. The DTMF tone is conveyed to the tele-
phone line using the same route as the facsimile signal. The DTMF tone selection is controlled by the
CPU. The relay status during dialing is shown below.
CML Relay
PLS Relay
Line release
Line status
make
break
Speech
condition
First
digit
Second
digit
Prepause
Inter-digit
pause
make
break
make
break
Speech
condition
Speech
condition
Dial Pulse
PLS Relay
CML Relay
Line release
Line status
make
break
Speech
condition
First
digit
Second
digit
Prepause
Inter-digit
pause
make
break
make
break
Speech
condition
Speech
condition
DTMF signal
DTMF Tone
Summary of Contents for DP-3000
Page 2: ...The contents of this Technical Guide are subject to change without notice Published in Japan...
Page 148: ...148 2 27 EP PC Board Drawing Name EP PC Board 1 8 Model DP 2000 2500 3000...
Page 149: ...149 Drawing Name EP PC Board 2 8 Model DP 2000 2500 3000...
Page 150: ...150 Drawing Name EP PC Board 3 8 Model DP 2000 2500 3000...
Page 151: ...151 Drawing Name EP PC Board 4 8 Model DP 2000 2500 3000...
Page 152: ...152 Drawing Name EP PC Board 5 8 Model DP 2000 2500 3000...
Page 153: ...153 Drawing Name EP PC Board 6 8 Model DP 2000 2500 3000...
Page 154: ...154 Drawing Name EP PC Board 7 8 Model DP 2000 2500 3000...
Page 155: ...155 Drawing Name EP PC Board 8 8 Model DP 2000 2500 3000...
Page 156: ...156 2 28 G3B PC Board Drawing Name G3B PC Board 1 10 Model DP 2000 2500 3000...
Page 157: ...157 Drawing Name G3B PC Board 2 10 Model DP 2000 2500 3000...
Page 158: ...158 Drawing Name G3B PC Board 3 10 Model DP 2000 2500 3000...
Page 159: ...159 Drawing Name G3B PC Board 4 10 Model DP 2000 2500 3000...
Page 160: ...160 Drawing Name G3B PC Board 5 10 Model DP 2000 2500 3000...
Page 161: ...161 Drawing Name G3B PC Board 6 10 Model DP 2000 2500 3000...
Page 163: ...163 Drawing Name G3B PC Board 8 10 Model DP 2000 2500 3000...
Page 164: ...164 Drawing Name G3B PC Board 9 10 Model DP 2000 2500 3000 LCU LCE PCB LCU LCE PCB...
Page 165: ...165 Drawing Name G3B PC Board 10 10 Model DP 2000 2500 3000 To SC PCB...
Page 166: ...166 2 29 FRM PC Board Drawing Name FRM PC Board 1 1 Model DP 2000 2500 3000...
Page 177: ...177 2 31 LANC PC Board Drawing Name LANC PC Board 1 1 Model DP 2000 2500 3000...
Page 185: ...185 2 38 MAIN LVPS PC Board 100V MAIN LVPS PC Board 100V Drawing Name Model DP 2000 2500 3000...
Page 186: ...186 2 39 MAIN LVPS PC Board 200V MAIN LVPS PC Board 200V Drawing Name Model DP 2000 2500 3000...
Page 191: ...191 Drawing Name Finisher Controller PC Board 2 11 Model DP 2000 2500 3000...
Page 192: ...192 Drawing Name Finisher Controller PC Board 3 11 Model DP 2000 2500 3000...
Page 193: ...193 Drawing Name Finisher Controller PC Board 4 11 Model DP 2000 2500 3000...
Page 194: ...194 Drawing Name Finisher Controller PC Board 5 11 Model DP 2000 2500 3000...
Page 195: ...195 Drawing Name Finisher Controller PC Board 6 11 Model DP 2000 2500 3000...
Page 196: ...196 Drawing Name Finisher Controller PC Board 7 11 Model DP 2000 2500 3000...
Page 197: ...197 Drawing Name Finisher Controller PC Board 8 11 Model DP 2000 2500 3000...
Page 198: ...198 Drawing Name Finisher Controller PC Board 9 11 Model DP 2000 2500 3000...
Page 199: ...199 Drawing Name Finisher Controller PC Board 10 11 Model DP 2000 2500 3000...
Page 200: ...200 Drawing Name Finisher Controller PC Board 11 11 Model DP 2000 2500 3000...
Page 342: ...DZZSM00171 0...