Composition:
PI0 (IC4)
IC24, IC26, IC28, IC30, etc.
Circuit Operation:
This circuit is a circuit which detects the end of call at CO-CO call.
It converts whether the voice exits or not into the logic level (IC24, 26, 28, 30), then presents it to
CPU (IC1) through P10 (IC4). There are three methods for detecting the end of call as follows.
- No tone detection
- Cyclic tone detection
- Continuous tone detection
The four of this circuit are installed corresponding to each time slot of TS16~19.
Highway Control Circuit
Composition:
IC37, IC42, IC43, IC67, IC71
Circuit Operation:
This circuit is a circuit which transfers the data in the HWS 6 of the down highway onto HWR 6 of
the up highway for calling between CO and CO. TS16~19 are controlled individually.
The CPU (IC1) controls the gate IC (IC34, 42, 43, 67, 71) through PI0 (IC4), connects DHW 6 and
UHW 6.
Timing Signal Generator Circuit
Composition:
IC39, IC40, IC62, IC63, IC64, IC65
Circuit Operation:
This circuit is a circuit which generates the timing signals for using for ADPCM, CODEC Circuit
and Highway Control Circuit. These signals are generated from the channel select signals
(CH0~4) and the highway clock (C2M, C4MN) which are presented from the CPU BOARD.
48
Summary of Contents for KX-TA1232
Page 8: ...4 CONNECTION 8 ...
Page 9: ...9 ...
Page 16: ...16 ...
Page 19: ... 2 SYSTEM DIAGRAM OF PCM CLOCK 19 ...
Page 20: ... 3 SYSTEM DIAGRAM OF ANALOG LINE 20 ...
Page 21: ... 4 SYSTEM DIAGRAM OF POWER SUPPLY 21 ...
Page 49: ...49 ...
Page 52: ...52 ...
Page 53: ...9 2 NO DIAL TONE CHECK EXTENSION BOARD 53 ...
Page 54: ...54 ...
Page 55: ...9 3 CANNOT DIAL CHECK EXTENSION BOARD 55 ...
Page 56: ...9 4 CANNOT ACCESS AN EXTENSION CHECK EXTENSION BOARD POWER SUPPLY UNIT AND CPU BOARD 56 ...
Page 57: ...9 5 CANNOT SEND A HOLD TONE CHECK CPU BOARD 9 5 1 HOLD TONE TO COL 57 ...
Page 61: ...9 10 EXTENSION IS NOT RINGING WHILE BEING CALLED FROM A CO LINE CHECK CO BOARD 61 ...
Page 62: ...10 DIAGNOSTIC METHOD 10 1 HOW TO GET INTO SELF DIAGNOSTIC MODE 62 ...
Page 63: ...10 2 TEST ITEMS 63 ...
Page 67: ...67 ...
Page 68: ...68 ...
Page 69: ...69 ...
Page 70: ...70 ...
Page 71: ...13 EXTENSION CABLE FOR SERVICING KX TA1232 71 ...
Page 72: ...72 ...
Page 73: ...14 CABINET AND ELECTRICAL PARTS LOCATION KX TA1232 73 ...
Page 74: ...74 ...
Page 75: ...75 ...
Page 76: ...14 1 ACTUAL SIZE OF SCREWS AND WASHER 76 ...
Page 77: ...77 ...
Page 78: ...15 ACCESSORIES AND PACKING MATERIALS KX TA1232 78 ...
Page 79: ...16 REPLACEMENT PARTS LIST KX TA1232 Note 79 ...
Page 130: ...18 CABINET AND ELECTRICAL PARTS LOCATION KX TA123260 130 ...
Page 131: ...19 ACCESSORIES AND PACKING MATERIALS KX TA123260 131 ...
Page 141: ...22 CABINET AND ELECTRICAL PARTS LOCATION KX TA123270 141 ...
Page 142: ...23 ACCESSORIES AND PACKING MATERIALS KX TA123270 142 ...
Page 164: ...25 3 HOW TO REMOVE THE MAIN BOARD Procedure 25 1 25 2 25 3 1 Remove the Main Board 164 ...
Page 165: ...26 CABINET AND ELECTRICAL PARTS LOCATION KX TA123280 165 ...
Page 166: ...27 ACCESSORIES AND PACKING MATERIALS KX TA123280 166 ...