Voltage Watching Circuit
Composition:
Reset IC (IC13)
Q6, 7 etc.
Circuit Operation:
Voltage Watching Circuit is a security circuit which detects the ration of +5 V and +15 V. If +5 V is
derated, this circuit resets the system. If +15 V is derated, this circuit presents "L" to I/O port in
CPU. The ration of +15 V means AC power off.
RS-232C Interface Circuit
Composition:
Receiver/Driver IC (IC15, 16)
16 bit CPU (IC1)
Circuit Operation:
RS-232C Circuit is a circuit for realizing the data transmission between CPU 68301 (IC1) and a
personal computer/printer etc. This circuit consists of a serial interface built in CPU and the level
conversion circuit. When the power turns on, the power supply for the RS-232C driver (IC15, 16)
is controlled by CPU to prevent the indefinite data presentation.
(3) BASIC CO BOARD
BASIC CO BOARD consists of the following:
Call interface
Parallel I/O Circuit
Timing Signal Generation Circuit
Call Interface Circuit
Call Interface Circuit is a circuit which works as the interface between the call line and the PCM
highway, and is classifies as following circuits.
Composition:
(a) Bell Signal Detection Circuit
(b) DC loop formation Circuit
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Содержание KX-TA1232
Страница 8: ...4 CONNECTION 8 ...
Страница 9: ...9 ...
Страница 16: ...16 ...
Страница 19: ... 2 SYSTEM DIAGRAM OF PCM CLOCK 19 ...
Страница 20: ... 3 SYSTEM DIAGRAM OF ANALOG LINE 20 ...
Страница 21: ... 4 SYSTEM DIAGRAM OF POWER SUPPLY 21 ...
Страница 49: ...49 ...
Страница 52: ...52 ...
Страница 53: ...9 2 NO DIAL TONE CHECK EXTENSION BOARD 53 ...
Страница 54: ...54 ...
Страница 55: ...9 3 CANNOT DIAL CHECK EXTENSION BOARD 55 ...
Страница 56: ...9 4 CANNOT ACCESS AN EXTENSION CHECK EXTENSION BOARD POWER SUPPLY UNIT AND CPU BOARD 56 ...
Страница 57: ...9 5 CANNOT SEND A HOLD TONE CHECK CPU BOARD 9 5 1 HOLD TONE TO COL 57 ...
Страница 58: ...9 5 2 BGM BACK GROUND MUSIC 9 6 TOO MUCH NOISE LEVEL WITH INTERCOM HUM CHECK POWER EXTENSION AND CO BOARD 58 ...
Страница 59: ...9 7 CO LINE S RELEASED DURING A CALL CHECK CO BOARD 9 8 CAN NOT RECEIVE COL DIAL TONE CHECK CO BOARD 59 ...
Страница 60: ...9 9 CAN NOT SEND DTMF TONES CHECK CO BOARD WHEN PULSE TONE CONVERSION SPEED DIAL ONE TOUCH DIAL REDIAL 60 ...
Страница 61: ...9 10 EXTENSION IS NOT RINGING WHILE BEING CALLED FROM A CO LINE CHECK CO BOARD 61 ...
Страница 62: ...10 DIAGNOSTIC METHOD 10 1 HOW TO GET INTO SELF DIAGNOSTIC MODE 62 ...
Страница 63: ...10 2 TEST ITEMS 63 ...
Страница 67: ...67 ...
Страница 68: ...68 ...
Страница 69: ...69 ...
Страница 70: ...70 ...
Страница 71: ...13 EXTENSION CABLE FOR SERVICING KX TA1232 71 ...
Страница 72: ...72 ...
Страница 73: ...14 CABINET AND ELECTRICAL PARTS LOCATION KX TA1232 73 ...
Страница 74: ...74 ...
Страница 75: ...75 ...
Страница 76: ...14 1 ACTUAL SIZE OF SCREWS AND WASHER 76 ...
Страница 77: ...77 ...
Страница 78: ...15 ACCESSORIES AND PACKING MATERIALS KX TA1232 78 ...
Страница 79: ...16 REPLACEMENT PARTS LIST KX TA1232 Note 79 ...
Страница 130: ...18 CABINET AND ELECTRICAL PARTS LOCATION KX TA123260 130 ...
Страница 131: ...19 ACCESSORIES AND PACKING MATERIALS KX TA123260 131 ...
Страница 138: ...21 2 HOW TO REMOVE THE LOWER CABINET Procedure 21 1 21 2 1 Remove the five Screws B 2 Remove the Lower Cabinet 138 ...
Страница 139: ...21 3 HOW TO REMOVE THE MAIN BOARD Procedure 21 1 21 2 21 3 1 Remove the Screws C 2 Remove the Main Board 139 ...
Страница 140: ...21 4 HOW TO REMOVE THE SUB BOARD Procedure 21 1 21 2 21 3 21 4 1 Remove the two Screws D 2 Remove the Sub Board 140 ...
Страница 141: ...22 CABINET AND ELECTRICAL PARTS LOCATION KX TA123270 141 ...
Страница 142: ...23 ACCESSORIES AND PACKING MATERIALS KX TA123270 142 ...
Страница 164: ...25 3 HOW TO REMOVE THE MAIN BOARD Procedure 25 1 25 2 25 3 1 Remove the Main Board 164 ...
Страница 165: ...26 CABINET AND ELECTRICAL PARTS LOCATION KX TA123280 165 ...
Страница 166: ...27 ACCESSORIES AND PACKING MATERIALS KX TA123280 166 ...
Страница 245: ...14 1 6 1 R703 R702 R701 R700 C700 C701 C702 C703 PQUP10135Z CN702 CN701 25 3 LED 1 2 PQUP10135Z ...