Function
Description
Sending OGM
Sending OGM (Out Going Message) stored in RAM to the CO line. 2 types
OGM for 32 sec. each are stored.
DTMF signal detection
After sending OGM to CO line, detecting the in-coming signal of DTMF.
Call between CO lines
Two call paths for call between CO lines.
DTMF repeat
When calling between the CO lines, resending the received DTMF to
maintain the certain level of the DTMF signals.
End of call detection
When calling between the CO lines, detecting the no tone, the cyclic tone
and the continuous tone.
2 channels/1 path, total 4 channels
OGM record
Recording the OGM from the specific extension into RAM. Controlling the
level by AGC circuit.
Only one channel is available as the recording channel.
FIFO communication
Communicating between CPU on this card and main CPU through FIFO
memory.
(5) CALLER ID CARD (KX-TA123293)
CALLER ID CARD is an optical card corresponding to “caller ID service” available in the north
American market. This board is added on the CO board and detects the 300 bps modem signals
transmitted during recesses between the bell signals form the station, and convents them into
the parallel data.
One card is corresponded to the 4 lines. Two cards can be installed on the BASIC CO BOARD (8
lines) and one board can be installed on the EXPANSION EXT BOARD (4 lines).
8. EXPLANATION OF CIRCUIT OPERATION
8.1. BASIC
(1) POWER SUPPLY UNIT
POWER SUPPLY UNIT consists of the following.
Line Filter Section
Rectifier and Smoothing Section
Switching Section
Control Section
+15 V Circuit
-15 V Circuit
+5.3 V Circuit
Bell Amp Circuit
Line Filter Section
Common mode noise is removed by C401, C402 and C405 to C406, and normal mode noise by
L400 and L401. Lightening surges are absorbed by CR400, CR401 and SA400.
28
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 ...