Panasonic KX-T7730X Manuale utente

ORDERNO. KMS0110592C3

PROPRIETARYTELEPHONE

KX-T7730X

(forAsia, MiddleNearEast, Africa and LatinAmerica)

SPECIFICATIONS

1. INTRODUCTION

1.1. NOTE

Whenyou notetheserial number, writedownall ofthe11 digits.

Theserial numbermay befound on thelabel affixedtothebottom oftheunit.

1.2. FORSERVICETECHNICIANS

ICsand LSIsarevulnerabletostaticelectricity.

Whenrepairing, thefollowing precautionswill helppreventrecurring malfunctions.

1. Covertheplasticparts boxes withaluminumfoil.

2. Ground thesoldering irons.

3. Use aconductivemat on theworktable.

4. DonottouchICorLSI pinswithbarefingers.

2. LOCATIONOFCONTROLS

3. CONNECTION

Caution:

Ensurethecordisinsertedinthegroovetopreventdamagetothe

connector.

4. DISASSEMBLYINSTRUCTIONS

1. Remove theStand.

2. Remove 4Screws(A).

3. Remove theBottom Cabinet.

4. Remove theConnector (1~3)and theFlatCable

from theMainBoard.

5. Remove 2Screws(A).

6. Remove theMainBoard from theTop Cabinet.

7. Remove theCablefrom theMainBoard.

8. Remove theLCD Holderbysliding theHookinthe

direction ofthearrowfrom theMainBoard.

5. ICDATA

PinNo. Terminal

Name I/OFunction I/OSetting Description

1RE0 I I LCD linageH:3lineModel L:Other

2TEST I - Vcc Connection

3OSC1 I - 4MHz

4OSC2 O - 4MHz

5RESET I -

6X1 I - NotusedVcc Connection

7X2 O - Open

8GND - -

9D0 I/O OHS SMmute

10 D1 I/O OHFMM mute

11 D2 I/O O(I) HFSMmute(Thisisalsomodel code.)

12 D3 I/O OHFRelay

13 D4 I/O OHS poweron

14 D5 I/O OHFpoweron (CS)

15 D9 I/O IHOLDKey L:Key press

16 D10 I/O ODO

17 D11 I/O ODCLR

18 D12 I I DI

19 D13 I I DI_INT

20 R00 I/O IKEY-IN0

21 R01 I/O IKEY-IN1

22 R02 I/O IKEY-IN2

23 R03 I/O IKEY-IN3

24 R10 I/O IKEY-IN4

25 R11 I/O IKEY-IN5

26 R12 I/O IKEY-IN6

27 R13 I/O IHook-SW

28 R20 I/O OKEY/LED-COM0

29 R21 I/O OKEY/LED-COM1

30 R22 I/O OKEY/LED-COM2

31 R23 I/O OKEY/LED-COM3

32 R30 I/O I/O KEY-COM4

33 R33 I/O O(I) LCD_Contrast1(Thisisalsomodel

code.)

34 R32 I/O O *LCD_Contrast0

35 R31 I/O I/O KEY-COM5

36 R40 I/O IRing vol off

37 R41 I/O O LCD_CLK

38 R42 I/O O(I) LCD_STB/(Model Code)

39 R43 I/O O LCD_DO

40 R60 I/O O LED0

R61

LED1

R61

LED1

PinNo. Terminal

Name I/OFunction I/OSetting Description

42 R62 I/O O LED2

43 R63 I/O O LED3

44 R70 I/O O LED4

45 R71 I/O O LED5

46 R72 I/O O LED6

47 R73 I/O O LED7

48 R80 I/O OHFSP vol 1

49 R81 I/O OHFSP vol 2

50 R82 I/O OHFSP vol 3

51 R83 I/O OHFSP vol 4

52 R90 I/O OTonecont1

53 R91 I/O OTonecont2

54 R92 I/O OTonecont3

55 R93 I/O OTonecont4

56 RA0 I/O OHS SP vol 1

57 RA1 I/O OHS SP vol 2

58 SEL I I AFour-minuteCycleVcc Connection

59 VCC - -

60 TONC O O DTMFColumn

61 TONR O O DTMFRow

62 VTref - - DTMFStandard Power

63 RD0 I I HeadSetDetention

64 RD1 I I TONE-DET

6. BLOCK DIAGRAM

7. CIRCUITOPERATIONS

7.1. KEYINPUTCONTROLCIRCUIT

Sequential inputinformation isexecutedbydynamicscanning.

TheportsR20~R23, R30, R31 ofIC1arebroughttohigh statusconsecutively.

Ifakey ispressed, thekey-ininformation inputisexecutedbyportsR00~R03, R10~R13.

7.2. LEDCIRCUIT

CircuitOperation:

TheLEDexecutes dynamiclighting for thestatusindicators, and control isexecutedbythe

outputportsR20~R23, R60~R63, R70~R73.

7.3. DATACOMMUNICATIONCIRCUIT

Function:

Thedatacommunication circuitserves thefollowing functions:

Information exchangerbetweenthePBX and proprietarytelephone, key inputinformation as well

as datafor theLEDcontrol, LCD control, etc. Thisinformation iscontinuouslyexchangedatall

times.

CircuitOperation:

Whentheproprietarytelephonereceives anIRQsignal from thePBX and aftersending thekey

inputinformation (19 pulses)tothePBX and receiving data(47 pulses)for theLEDcontrol, etc.,

theproprietarytelephonewill return tothePBX anacknowledgesignal.

1)Reception

Thedatafrom thePBX isreceivedviatheHand Llines along thepathshownbelow.

H, LLineD2T2R106 Q102 IC2IC1Pin18

2)Transmission

Thedatatotheproprietarytelephoneistransmittedalong thefollowing path.

IC1Pin16 IC2Q101 T2D2H, LLine

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