DOWNLOAD Panasonic KX-TDA6178X / KX-TDA6178XJ (serv.man3) Service Manual ↓ Size: 1.87 MB | Pages: 43 in PDF or view online for FREE

ORDER NO. KMS1301606SE

(for Europe, Asia Oceania, Middle Near East, Latin
America, Russia and Africa)

PAGE

PAGE

1 CHANGES----------------------------------------------------------- 2

1.1. Subject ------------------------------------------------------ 2
1.2. Specifications ----------------------------------------------- 2
1.3. Technical Descriptions ----------------------------------- 3

1.3.1. Block Diagram ----------------------------------------- 3
1.3.2. Circuit Operation -------------------------------------- 4

1.4. Troubleshooting Guide ----------------------------------13
1.5. Schematic Diagram --------------------------------------20

1.5.1. Block Diagram ----------------------------------------20
1.5.2. No.1 -----------------------------------------------------21
1.5.3. No.2 -----------------------------------------------------23
1.5.4. No.3 -----------------------------------------------------25
1.5.5. No.4 -----------------------------------------------------27
1.5.6. No.5 -----------------------------------------------------29
1.5.7. Waveform ----------------------------------------------31

1.6. Printed Circuit Board-------------------------------------33

1.6.1. Component View-------------------------------------33
1.6.2. Bottom View-------------------------------------------34

1.7. Replacement Parts List ---------------------------------35

2

KX-TDA6178X / KX-TDA6178XJ

Suffix

Reason for suffix change

E to F

Change PCB for VE and Change Software (U2Q1AE

→U2Q1AG) for improvement market quality.

Suffix

Reason for suffix change

H to I

Change PCB for VE and Change Software (U2Q1AE

→U2Q1AG) for improvement market quality.

Functional Block

Functional contents

Extension Interface

Number of Ports

24 ports

SLT Interface

-26V 26mA Feeding function
Dial-pulse signal detecting function
DTMF signal detecting function
Bell signal issuing function
Hook detecting function
Ringtrip detecting function
2W/4W converting function
Surge protective function
CODEC function

• Test function (Loop back, Tone generation)
• Programmable digital filtering function
• Serial interface function
• PIO function

DTMF Receiver

24 lines for each port

Caller ID (FSK)

24 lines for each port

On-board Ringer

20/25Hz 65Vrms
Phase control (Three-phase / Four-phase)

On-board DC/DC Power Supply

Input +15V
Output +3.3V
Input +40V
Output : VBAT(The required negative battery voltage). 
The battery voltage generation circuit intelligently tracks the VBAT voltage to the optimal value under each
operating state (e.g. on-hook, off-hook, ringing, etc.)

Power Failure Forwarding Function

4 lines supported

ASIC

EC bus interface function
H.100 bus interface function, Digital PLL function
Local bus interface function
Time switch function, Gain controlling function, FIFO/DPRAM function
Intelligent PIO function

Control Unit

CPU

SH-1/SH7020 (12.288MHz)

Flash ROM

512Kbyte

SRAM

128Kbyte

PLD

• Interface between codec and CPU
• Lattice MachX02 LCMXO2-640HC-4TG100C

LED Display Circuit

Card status indicating LED: Two colors (Red/Green)

External Interface Connector

Extension interface

50pin Amphenol connector: 1

Power failure forwarding 4pin modular jack: 1

3

KX-TDA6178X / KX-TDA6178XJ

ECSLC24 BLOCK DIAGRAM

PLD 

OSC16.3 8

4 M

OSC 

12.288M 

EC-Bus

CT-Bus 

15V 

Card_ID 

FLASH 

(512KB) 

SRAM 

(128KB) 

PCM-HW 

Serge

PFT 

Jack

T/R 

PFT            

Relay 

T/R 

PFT 
Jack

SLIC/CODEC  

2ch 

Port1 

SCI(7pin) 

DC/DC 

3.3V 

FPGA_INT 

BELL_SYNC 

nHALT 

nIRQ1 

BELL_SYNC 

FPGA_INT 

Diag T/R 

nHALT 

40V 

Diag 

Diag T/R 

nCS0

nCS1  

nCS2

nCS3 

nCS[3: 0] 

nIRQ1 

CPU 

nIRQ0 

nIRQ1 

nIRQ3 

Port4 

Port3 

Port2 

Port6 

Port5 

PFT      

 

Relay 

Port7

8

Port 23 24 

Port 21 22 

Port 19 20 

Port 17 18 

Port 15 16 

Port 13 14 

Port 11 12 

Port 9

10 

SPI 

C_CS[0:11]

C_INT[0:11]

nIRQ2 

Local 
Control 
Bus 

C_CS[0]  

C_CS[1]  

C_CS[2]  

C _INT[0]

C_INT[1]  

C_INT[2]  

C_INT[3]  

C_CS[3]  

PCM_HW 

SPI 

C_INT[4]  

C_CS[4]  

PCM_HW 

SPI 

C_INT[5]  

C_CS[5]  

PCM_HW 

SPI 

C_INT[6]  

C_CS[6]  

PCM_HW 

SPI 

C_INT[7]  

C_CS[7]  

PCM_HW 

SPI 

C_INT[8]  

C_CS[8]  

PCM_HW 

SPI 

C_INT[9]  

C_CS[9]  

PCM_HW 

SPI 

C_INT[10]  

C_CS[10]  

PCM_HW 

SPI 

C_INT[11]  

C_CS[11]  

PCM_HW 

SPI 

Port8

Port7

Port10

Port9 

Port12 

Port11 

Port14 

Port13 

Port16 

Port15 

Port18 

Port17 

Port20 

Port19 

Port22 

Port21 

Port24 

Port23 

OSC32M 

Program

connector

Note1.Group of Signal lines
Local Control

 Bus

:

 connect to PLD

ADR[4:0],DATA[15:0], nWE , nR D ,nWAIT , CKIO

PCM - HW :
HWCLK

 ,HWFH

 ,DHW

 ,UHW

SPI :
SCLK

 ,DOUT

 ,DIN

LED x 2 

40V  

Serge

DCDC

DCDC  

40V  

PR_SET

PF_RELAY

T/R

T/R

PFT  

Relay

PFT  

Relay

Serge

DCDC

Serge

DCDC

4

KX-TDA6178X / KX-TDA6178XJ

• CPU (System clock: 12.288 MHz)......IC601

Data bus: 16bit, Address bus: 23bit

• Flash ROM (512Kbyte)......IC602

Flash memory consists of two areas: boot space and administration space.
Administration program can be rewritten through downloading.

• SRAM (1Mbit)......IC603

Used for the data buffer for CPU work area, and SLT communication.

• Reset

Resets of an MCSLC24 card are roughly classified into the two kinds: ASIC reset and LPR reset.
After the release of the ASIC reset, the LPR reset is released by the soft reset from the side of the main card and the LPR pro-
gram is booted.

Type of reset

Reset method

Specification

ASIC reset

ASIC reset is reset under the AND condition of reset signals (negative logic)
listed below.

Power-on reset

Reset by reset IC

Hard reset from the main bus

Reset by EC_RST signal

Soft reset from the main bus

Released after the specified time

LPR reset

Soft reset from the main bus

Low active
Reset pulse width: 1.6 microseconds or more