26.5. CIRCUIT OPERATION
26.5.1. CO Interface Circuit
26.5.1.1. Composition
This is composed of the following circuit:
1) Bell signal detection
2) DC loop formation circuit
3) Pulse dial transmission circuit
4) CALL ID interface circuit
5) COL bidirectional amplifier circuit
1) Bell signal detection
When CO line is idle, photo coupler PC1, PC2 are OFF.
When there is an incoming signal from CO line, the current flows PC1 as in the following way.
Tip
→
L1
→
R2
→
PC1(1-2)
→
C3
→
T2
→
R5
→
L1
→
Ring: This cause pin4 of PC1 to change the level from High to low.
Ring
→
L1
→
R5
→
T2
→
C3
→
PC2(1-2)
→
R2
→
L1
→
Tip: This cause pin4 of PC2 to change the level from High to low.
211
KX-TES824LA / KX-TEM824LA /
Содержание KX-TES824LA
Страница 6: ...1 2 HOW TO RECOGNIZE THAT Pb FREE SOLDER IS USED 6 KX TES824LA KX TEM824LA ...
Страница 12: ...6 NAMES AND LOCATIONS 7 CONNECTION 7 1 SERIAL INTERFACE CONNECTION 12 KX TES824LA KX TEM824LA ...
Страница 28: ...28 KX TES824LA KX TEM824LA ...
Страница 42: ...12 TROUBLESHOOTING GUIDE 12 1 NO OPERATION Check POWER SUPPLY BOARD MAIN BOARD 42 KX TES824LA KX TEM824LA ...
Страница 43: ...12 2 NO DIAL TONE KX TES824LA MAIN BOARD OF KX TEM824LA 43 KX TES824LA KX TEM824LA ...
Страница 44: ...12 3 CANNOT DIAL KX TES824LA MAIN BOARD OF KX TEM824LA 44 KX TES824LA KX TEM824LA ...
Страница 55: ...14 TERMINAL GUIDE OF ICS TRANSISTORS AND DIODES 55 KX TES824LA KX TEM824LA ...
Страница 57: ...16 FIXTURES AND TOOLS 57 KX TES824LA KX TEM824LA ...
Страница 58: ...17 CABINET AND ELECTRICAL PARTS LOCATION 58 KX TES824LA KX TEM824LA ...
Страница 59: ...18 ACCESSORIES AND PACKING MATERIALS 59 KX TES824LA KX TEM824LA ...
Страница 79: ...79 KX TES824LA KX TEM824LA ...
Страница 111: ...21 7 1 WAVEFORM 111 KX TES824LA KX TEM824LA ...
Страница 112: ...112 KX TES824LA KX TEM824LA ...
Страница 113: ...21 7 2 Memo 113 KX TES824LA KX TEM824LA ...
Страница 119: ...23 KX TE82461X 4 PORT DOORPHONE CARD 119 KX TES824LA KX TEM824LA ...
Страница 120: ...23 1 HOW TO RECOGNIZE THAT Pb FREE SOLDER IS USED 120 KX TES824LA KX TEM824LA ...
Страница 123: ...123 KX TES824LA KX TEM824LA ...
Страница 127: ...23 7 TERMINAL GUIDE OF ICS TRANSISTORS AND DIODES 127 KX TES824LA KX TEM824LA ...
Страница 128: ...23 8 ACCESSORIES AND PACKING MATERIALS 128 KX TES824LA KX TEM824LA ...
Страница 135: ...24 KX TE82474X 8 PORT SLT EXTENSION CARD 135 KX TES824LA KX TEM824LA ...
Страница 136: ...24 1 HOW TO RECOGNIZE THAT Pb FREE SOLDER IS USED 136 KX TES824LA KX TEM824LA ...
Страница 142: ...142 KX TES824LA KX TEM824LA ...
Страница 143: ...143 KX TES824LA KX TEM824LA ...
Страница 147: ...24 5 TROUBLESHOOTING GUIDE 24 5 1 No Dial Tone 24 5 2 Cannot Dial 147 KX TES824LA KX TEM824LA ...
Страница 148: ...24 5 3 Cannot Call Extension 148 KX TES824LA KX TEM824LA ...
Страница 151: ...24 8 CABINET AND ELECTRICAL PARTS 24 9 ACCESSORIES AND PACKING MATERIALS 151 KX TES824LA KX TEM824LA ...
Страница 157: ...24 12 MEMO 157 KX TES824LA KX TEM824LA ...
Страница 166: ...25 KX TE82480X 2 PORT ANALOGUE CO LINE AND 8 PORT SLT EXTENSION CARD 166 KX TES824LA KX TEM824LA ...
Страница 167: ...25 1 HOW TO RECOGNIZE THAT Pb FREE SOLDER IS USED 167 KX TES824LA KX TEM824LA ...
Страница 178: ...178 KX TES824LA KX TEM824LA ...
Страница 179: ...179 KX TES824LA KX TEM824LA ...
Страница 183: ...25 6 TROUBLESHOOTING GUIDE 25 6 1 No Dial Tone 25 6 2 Cannot Dial 183 KX TES824LA KX TEM824LA ...
Страница 185: ...25 6 6 Cannot Receive Call Dial Tone 25 6 7 Cannot Send A Hold On Music 185 KX TES824LA KX TEM824LA ...
Страница 188: ...25 9 CABINET AND ELECTRICAL PARTS 25 10 ACCESSORIES AND PACKING MATERIALS 188 KX TES824LA KX TEM824LA ...
Страница 206: ...26 KX TE82483X 3 PORT ANALOGUE CO LINE AND 8 PORT HYBRID EXTENSION 206 KX TES824LA KX TEM824LA ...
Страница 207: ...26 1 HOW TO RECOGNIZE THAT Pb FREE SOLDER IS USED 207 KX TES824LA KX TEM824LA ...
Страница 216: ...216 KX TES824LA KX TEM824LA ...
Страница 217: ...217 KX TES824LA KX TEM824LA ...
Страница 222: ...26 6 TROUBLESHOOTING GUIDE 26 6 1 No Dial Tone 26 6 2 Cannot Dial 222 KX TES824LA KX TEM824LA ...
Страница 224: ...26 6 7 Cannot Receive Call Dial Tone 26 6 8 Cannot Send a Hold On Music 224 KX TES824LA KX TEM824LA ...
Страница 227: ...26 8 TERMINAL GUIDE OF ICS TRANSISTORS AND DIODES 227 KX TES824LA KX TEM824LA ...
Страница 228: ...26 9 CABINET AND ELECTRICAL PATRS 26 10 ACCESSORIES AND PACKING MATERIALS 228 KX TES824LA KX TEM824LA ...
Страница 248: ...27 KX TE82491X MESSAGE EXTENSION CARD FOR DISA UCD OGMs 248 KX TES824LA KX TEM824LA ...
Страница 249: ...27 1 HOW TO RECOGNIZE THAT Pb FREE SOLDER IS USED 249 KX TES824LA KX TEM824LA ...
Страница 253: ...27 5 TERMINAL GUIDE OF ICS TRANSISTORS AND DIODES 27 6 ACCESSORIES AND PACKING MATERIALS 253 KX TES824LA KX TEM824LA ...
Страница 259: ...28 KX TE82492X 2 CHANNEL VOICE MESSAGE CARD 259 KX TES824LA KX TEM824LA ...
Страница 260: ...28 1 HOW TO RECOGNIZE THAT Pb FREE SOLDER IS USED 260 KX TES824LA KX TEM824LA ...
Страница 264: ...28 5 TROUBLESHOOTING GUIDE 28 5 1 PBX cannot work 264 KX TES824LA KX TEM824LA ...
Страница 265: ...28 5 2 Cannot Erase 28 5 3 Cannot Record Playback 265 KX TES824LA KX TEM824LA ...
Страница 267: ...28 7 TERMINAL GUIDE OF ICS TRANSISTORS AND DIODES 28 8 ACCESSORIES AND PACKING MATERIALS 267 KX TES824LA KX TEM824LA ...
Страница 273: ...29 KX TE82493X 3 PORT CALLER ID CARD 273 KX TES824LA KX TEM824LA ...
Страница 274: ...29 1 HOW TO RECOGNIZE THAT Pb FREE SOLDER IS USED 274 KX TES824LA KX TEM824LA ...
Страница 280: ...29 7 TERMINAL GUIDE OF ICS TRANSISTORS AND DIODES 29 8 ACCESSORIES AND PACKING MATERIALS 280 KX TES824LA KX TEM824LA ...
Страница 287: ...30 KX A227X BACK UP BATTERY CABLE 287 KX TES824LA KX TEM824LA ...
Страница 288: ...30 1 ACCESSORIES AND PACKING MATERIALS 288 KX TES824LA KX TEM824LA ...