DOWNLOAD Panasonic KX-TDA6178X / KX-TDA6178XJ (serv.man8) Service Manual ↓ Size: 256.23 KB | Pages: 4 in PDF or view online for FREE

ORDER NO. KMS1710910SE

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

PAGE

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

1.1. Replacement Parts List ---------------------------------- 2

2 CORRECTION------------------------------------------------------ 3

2.1. Specifications ----------------------------------------------- 3
2.2. Power Supply----------------------------------------------- 4

2

KX-TDA6178X/KX-TDA6178XJ

 

Reason for Change
*The following items (1-8) indicate the reason for change. See the “Notes” column for each part in ORIGINAL AND NEW PARTS COMPARISON 
LISTS.
1. Improve performance

2. Change of material or dimension
3. To meet approved specification
4. Standardization
5. Addition
6. Deletion
7. Correction
8. Other

Interchangeability Code (Symbols: B) Following V-Z interchange abilities are indicated on the Notes in the bottom column.

Parts

Set Production

V Original

New

Early (before change)
Late (after change)

Original or new parts may be used in early or late production sets.
Use original parts until exhausted, then stock new parts.

W Original

New

Early (before change)
Late (after change)

Original parts may be used in early production sets only. New parts may be used in early or
late production sets. Use original parts where possible, then stock new parts.

X Original

New

Early (before change)
Late (after change)

New parts only may be used in early or late production sets.
Stock new parts.

Y Original

New

Early (before change)
Late (after change)

Original parts may be used in early production sets only. New parts may be used in late
production sets only. Stock both original and new parts.

Z Other

Ref. No.

Part No.

Part Name & Description

Pcs

Remarks

Notes

Time of change 

(Suffix)

Original (Old)

Main Board Parts
IC602

PNWI26178XJ7

IC

1

1

W

---

3

KX-TDA6178X/KX-TDA6178XJ

Change from the Original Service Manual Section 3.

Functional Block

Functional contents

Extension Interface

Number of Ports

24 ports

SLT Interface

-26V 26mA Feeding function

(Voltage in ports 1-8 are switched over to -45V, depending on the circuit dis-
tance.)

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

4

KX-TDA6178X/KX-TDA6178XJ

Change from the Original Service Manual Section 5.2.6.

NM

KXTDA6178X

KXTDA6178XJ

TA

RA

C313A

CN201

2

DIAG_T

RL201A

6

7

5

CN201

3

DIAG_R

RL201A

3

2

4

C313B

DG

C302A

C303A

C302B

C303B

VBATa

J300A

DG

DG

R310A

R308A

R309A

R308B

R309B

D

305A

C

304A

DG

D

304A

FG

C

305A

C

321A

C3

1

0

A

R315A

R316A

C3

0

9

A

L300A

DG

DG

R314A

D

301A

1

2

C308A

L301A

+40V

DG

Q300A

S

1 2 3

G

4

D

5 6 7 8

Q301A

S

D

G

CN200

26

1

C307A

IC300A

TIPa

1

SRINGDCa

5

SRINGACa

6

STIPACa

7

STIPDCa

8

SVBATa

11

SDCHa

20

SDCLa

21

DCDRVa

22

DCFFa

23

DCFFb

24

STIPDCb

38

STIPACb

39

SRINGACb

40

SRINGDCb

41

RINGa

59

R319A

R318A

R313A

R306A

R306B

R307A

R307B

RL200A

9

10

8

RL200A

4

3

5

R317A

R260A

R261A

m

b

m

b

b

m

m

b

SDCL

SDCH

DCDRV

TIP

(Port1-8)

0

-45V

RING

(Port9-24)

-26V

Voltage and current generated by the SLIC is supplied to the phones.

Preset voltage is -45V(port1-8), -26V (port9-24) (On-hook).

Current is set as 26mA (Off-hook).