Panasonic KX-T2371MXW User manual

ORDERNO. KM40107835C3
TelephoneEquipment
KX-T2371MXW
IntegratedTelephoneSystem
White Version
(forAsia, MiddleNearEast and Otherareas)
SPECIFICATIONS
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1. LOCATIONOFCONTROLS
2. CONNECTION
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3. OPERATIONS
3.1. Making Calls
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3.2. Answering Calls
4. SPECIALFEATURES
4.1. ForCall Waiting Service Users
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4.2. TemporaryToneDialing (ForRotaryService Users)
4.3. How toUse thePAUSE Button (ForAnalog PBXLine/Long
Distance Service Users)
5. DISASSEMBLYINSTRUCTIONS
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Ref. No. Procedure ShowninFig—. Toremove —. Remove —.
1 1 1 LowerCabinet Screws(2.6×12)............. (A)×5
21~2 2 PrintedCircuitBoard Remove theP.C.Board
6. HOWTO REPLACE FLATPACKAGEIC
6.1. Preparation
-SOLDER
SparkleSolder115A-1, 115B-1 orAlmitSolderKR-19, KR-19RMA
-Soldering iron
Recommendedpowerconsumption will bebetween30 Wto40 W.
TemperatureofCopperRod 662 ±50°F(350 ±10°C)
(Anexpertmayhandlebetween60 Wto80 Wiron, butbeginner
mightdamagefoil byoverheating.)
-Flux
HI115 Specificgravity0.863.
(Original fluxwill bereplaceddaily.)
6.2. Procedure
1. TemporaryfixFLATPACKAGEICbysoldering on twomarked2
pins.
*Mostimportantmatterisaccuratesetting ofICtothecorresponding soldering foil.
2. Applyfluxforall pinsofFLATPACKAGEIC.
3. Solderemploying specifiedsoldertodirection ofarrow, as sliding
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thesoldering iron.
6.3. Modification ProcedureofBridge
1. Re-solderslightlyon bridgedportion.
2. Removeremainedsolderalong pinsemploying soldering iron as
showninbelow figure.
7. CPU DATA
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8. TERMINALGUIDE OFIC’STRANSISTORS AND
DIODES
9. ICBLOCK DIAGRAM
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10. OPTIONJUMPER TABLE
10.1. Dialing ModeSW
IC1
SWPosition
Pin14 LOWTonedialing
Pin14 High Pulse dialing 10 pps
10.2. FlashKey
Flashtime Option
98 ms J1
305 ms J2
600 ms J3 default
11. BLOCK DIAGRAM(IC2)
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12. CIRCUITOPERATIONS
Note:Thecircuitdiagram may bemodifiedatanytimewiththedevelopmentofnewtechnology.
12.1. TelephoneLineInterface and Pulse Dial Circuit
WhenthehookswitchSW1isON(off-hook), thecircuitisclosed, and currentissuppliedtothe
base ofQ2viathediodebridgeD1and Q2isOnQ1isON(OFF-HOOKcondition).
Q1and Q2arethedial pulse generating circuits, and aredrivenbytheDIALER(IC1), whenthe
DIALERPin10 ofIC1isLOWQ2isOFF and Q1isOFF. (break)IfportPin10 isHIGHQ2is
ONQ1isON. (make)
12.2. ToneDial Circuit
Function:
Thetonedialing circuitconsistsofaDTMF(Dual ToneMulti Frequency)signal generator
(outputtedfrom Pin11 oftheIC1)for tonedialing, and alsoacircuitfor outputting thesignal to
line.
TheDTMFcircuitidentifies inputsfrom the12 keys (1,2,3,4,5,6,7,8,9,0, and #)bymeansofa
total ofsevenfrequencies, thatisfour lowfrequencies (Lowgroup)and three high frequencies
(High group).
CircuitDescription:
Whenadial key ispressed, aDTMFsignal isoutputfrom Pin11 ofIC1as ananalog synthetic
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