Matsushita Electric KX-T2375MXW User manual

ORDERNO. KM40108849C3
Telephone Equipment
KX-T2375MXW
Integrated Telephone System
White Version
(for Asia, MiddleNear East and Other areas)
SPECIFICATIONS
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2001 Kyushu Matsushita ElectricCo., Ltd. All rights reserved.
Unauthorized copying and distribution isaviolation of law.
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1. LOCATION OF CONTROLS
2. DISPLAY
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3. CONNECTION
3.1. Connecting the Handset/Telephone Line Cord
Afterconnection, lift the handset tocheck fora dial tone.
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-Use onlyaPanasonicHandset for the KX-T2375MXW.
3.2. Connecting aCommunication Device
If you connect a communication device (computer, modem, fax, answering machine, etc.) tothe
telephone line, you canconnect it through this unit using the DATA jack.
Afterconnecting the handset and telephone line cord, connect the communication device
telephone line cordtothe DATA jack.
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-Make sure the communication device isnot inuse before using
thisunit(making calls, storing phone numbers inmemoryetc.)or
the communication device maynot operate properly.
4. SETTINGS
4.1. Selecting the Dialing Mode
You canselect the dialing mode byprogramming. If you have touchtone service, set to"Tone".
If rotaryorpulse service is used, set to"Pulse". Yourphone comes fromthe factoryset to
"Tone".
Make sure that a call is not put on hold.
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4.2. Time Adjustment
You canselect AM/PM or24-hourclock byprogramming.
Make sure that a call is not put on hold.
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4.3. Setting the LCD Contrast
You canselect the LCD contrast level from1 to4 byprogramming. Yourphone comes fromthe
factoryset to3.
Make sure that a call is not put on hold.
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4.4. Selecting the Ringer Volume
You canselect the ringervolume toHIGH, LOW orOFF. Yourphone comes fromthe factoryset
toHIGH.
5. SPECIAL FEATURES
5.1. FLASHButton
Pressing allows you touse special features of yourhost PBX suchas transferring an
extension call oraccessing special telephone services (optional) suchas call waiting.
5.2. Selecting the Flash Time
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The flashtime depends on yourtelephone exchange orhost PBX. You canselect the following
flashtimes: "80, 90, 100, 110, 200, 250, 300, 400, 600, 700 ms (milliseconds)". Yourphone comes
fromthe factoryset to"600 ms".
Make sure that a call is not put on hold.
-Ifyou are connected viaaPBX, alonger flash time maybe
necessaryto use PBXfunctions (transferring acall, etc.). Consult
your PBXinstaller for the correct setting.
5.3. Setting the PinCode
A 4-digit PinCode (Personal Identification Number) prevents unauthorizedpersons fromusing
yourunit. The PinCode is requiredforthe dial lock and call restriction tobe set orcanceled.
The factorypreset Pincode is "1111".
Make sure that a call is not put on hold.
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5.4. Dial Lock
You canprevent others frommaking a call toanynumberexcept the one pre-programmedin
the memoryof the EMERGENCY button. Once you lockedthe dialing buttons, evenemergency
numbers cannot be dialed. Onlyincoming calls are accepteduntil the dial lock is canceled.
Before using this feature, we recommend storing anemergencynumberinthe memoryof the
EMERGENCY button. Evenif the dialing buttons are locked, the numberstoredinthe button can
be dialed.
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-Ifyou choose not to program emergencynumbers, but plan to use
the dial lock, anynumber programmed into the EMERGENCY
button can be accessed.
5.4.1. To Set the Dial Lock
You canuse the following features while the dialing buttons are locked.
-Dialing anumber you programmed into the memoryof the
EMERGENCYbutton.
-Adjusting the handset and speakerphone volumes.
-Muting the conversation.
-Answering the second call bypressing .
5.4.2. To Cancel the Dial Lock
Followsteps 1 through 3 above again.
-“ “will disappear, and the unitwill return to the standbymode.
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5.5. Call Restriction
You canprevent the unit fromdialing phone numbers beginning withspecifieddigit(s) (1 digit
or2 digits). Phone numbers withthe restrictedleading digits cannot be dialedout.
5.5.1. To Set the Call Restriction
Make sure that a call is not put on hold.
-Ifyour unitisconnected to aPBX, thisfunction maynot operate.
Contact your PBXsupplier for more information.
Whendialing a phone numberwiththe restrictedleading digit(s), the dialednumberwill flashon
the display, but not dialedout.
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5.6. How to Release the Establishment of Dial Lock
Afterthis procedure, you will be able toestablisha newpassword.
Howtorelease the establishment of dial lock.
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6. DISASSEMBLY INSTRUCTIONS
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Ref. No. Procedure ShowninFig—. To remove —. Remove —.
1 1 1 LowerCabinet Screws (2.6×12) . . . . . . . . . . . . .
(
2 1 ~ 2 2 PrintedCircuit Board Remove the P.C.Board
7. HOW TO REPLACE FLAT PACKAGE IC
7.1. Preparation
-SOLDER
SparkleSolder 115A-1, 115B-1 or AlmitSolder KR-19, KR-19RMA
-Soldering iron
Recommended power consumption will be between 30 Wto 40 W.
Temperature of Copper Rod 662 ± 50°F (350 ± 10°C)
(Anexpert mayhandlebetween 60 ~ 80 Wiron, but beginner might
damage foil byoverheating.)
-Flux
HI115 Specificgravity0.863
(Original flux will be replaced daily.)
7.2. Procedure
1. TemporaryfixFLATPACKAGEICbysoldering on twomarked 2
pins.
*Most important matter isaccurate setting of ICto the
corresponding soldering foil.
2. Applyflux for all pins of FLATPACKAGEIC.
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3. Solder employing specified solder to direction of arrow, as sliding
the soldering iron.
7.3. Modification Procedure of Bridge
1. Re-solder slightlyon bridged portion.
2. Remove remained solder along pins employing soldering iron as
showninbelow figure.
8. CPU DATA
8.1. IC801
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8.2. Speakerphone ICData
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Pin
NO. Name Description
1RR A resistortoground provides a reference current forthe transmit and receive
attenuators.
2RTX A resistortoground determines the nominal gainof the transmit attenuator. The
transmit
channel gainis inverselyproportional tothe RTX resistance.
3TXI Input tothe transmit attenuator. Input resistance is nominally5.0 kohms.
4TXO Output tothe transmit attenuator. The TXO output signal drives the input of the
transmit
detector, as well as the external circuit whichdrives the telephone line.
5TLI Input of the transmit level detector. Anexternal resistorac coupledtothe TLI pinsets
the
detection level. Decreasing this resistorincreases the sensitivitytotransmit channel
signals.
6TLO Output of the transmit level detector. Anexternal resistorand capacitorset the time
the
comparatorwill holdthe systeminthe transmit mode afterspeechceases.
7 RLI Input of the receive level detector. Anexternal resistorac coupledtothe RLI pinsets
the
detection level. Decreasing this resistorincreases the sensitivitytoreceive channel
signals.
8RLO Output of the receive level detector. Anexternal resistorand capacitorset the time
the
comparatorwill holdthe systeminthe receive mode afterthe receive signal ceases.
9 MCI Microphone amplifierinput. Input impedance is nominally10 kohms and the dc bias
voltage
approximatelyequal toVB.
10 MCO Microphone amplifieroutput. The mic ampgainis internallyset at 34 dB (50 V/V).
11 CP1 A parallel resistorand capacitorconnectedbetweenthis pinand Vcc holds a voltage
corresponding tothe background noise level. The transmit detectorcompares the
CP1
withthe speechsignal fromCP2.
12 CP2 A capacitorat this pinpeak detects the speechsignals forcomparison withthe
background
noise level heldat CP1.
13 XDI Input tothe transmit detectorsystem. The microphone amplifieroutput is ac coupled
to
pinthrough anexternal resistor.
14 SKG High current ground pinforthe speakerampoutput stage. The SKG voltage should
be
mV of the ground voltage at pin22.
15 SKO Speakeramplifieroutput. The SKO pinwill source and sink up to100 mA whenac
coupled
the speaker. The speakerampgainis internallyset at 34 dB (50 V/V).
16 V+ Input dc supplyvoltage. V+ canbe poweredfromTipand Ring if anac decoupling
inductor
usedtoprevent loading ac line signals. The requiredV+ voltage is 6.0 to11 V (7.5 V
nominal)
7.0 mA.
17 AGC A capacitorfromthis pintoVB stabilizes the speakerampgaincontrol loop, and
additionally
controls the attack and decaytime of this circuit. The gaincontrol loop limits the
speaker
input toprevent clipping at SKO. The internal resistance at the AGC pinis nominally
110
18 CS Digital chipselect input. Whenat a Logic "0" (<0.7 V) the Vcc regulatoris enabled.
When
Logic "1" (>1.6 V), the chipis inthe standbymode drawing 0.5 mA. AnopenCS pinis
a
"0". Input impedance is nominally140 kohms. The input voltage shouldnot exceed11
V.
19 SKI Input tothe speakeramplifier. Input impedance is nominally20 kohms.
20 Vcc A 5.4 V regulatedoutput whichpowers all circuit expect the speakeramplifieroutput
stage.
canbe usedtopowerexternal circuitrysuchas a microprocessor(3.0 mA max). A
filter
capacitoris required. The MC 34018 canbe poweredbya separate regulatedsupply
by
connecting V+ and Vcc toa voltage between4.5 V and 6.5 V while maintaining CS at a
Logic
21 VB Anoutput voltage equal toapproximatelyVcc/2 whichserves as ananalogue ground
for
speakerphone system. Upto1.5 mA of external loadcurrent maybe sourcedfrom
VB.
impedance is 250 ohms. A filtercapacitoris required.
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Pin
NO. Name Description
22 Gnd Ground pinforthe IC (except the speakeramplifier).
23 XDC Transmit detectoroutput. A resistorand capacitorat this pinholdthe systeminthe
transmit
mode during pauses betweenwords orphrases. Whenthe XDC pinvoltage decays to
ground,
the attenuators switchfromthe transmit mode tothe idle mode. The internal resistor
at
nominally2.6 kohms.
24 VLC Volume control input. Connecting this pintothe sliderof a variable resistorprovides
receive
mode volume control. The VLC pinvoltage shouldbe less thanorequal toVB.
25 ACF Attenuatorcontrol filter. A capacitorconnectedtothis pinreduces noise transients
as
attenuatorcontrol switches levels of attenuation.
26 RXO Output of the receive attenuator. Normallythis pinis ac coupledtothe input of the
speaker
amplifier.
27 RXI Input of the receive attenuator. Input resistance is nominally5.0 kohms.
28 RRX A resistortoground determines the nominal gainof the receive attenuator. The
receive
gainis directlyproportional tothe RRX resistance.
9. TERMINAL GUIDE OF IC’S TRANSISTORS AND
DIODES
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