DOWNLOAD Panasonic KX-TDA3194XJ Service Manual ↓ Size: 1.5 MB | Pages: 34 in PDF or view online for FREE

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1 Safety Precautions -----------------------------------------------3

1.1.  For Service Technicians ---------------------------------3

2 Warning --------------------------------------------------------------3

2.1. About Lead Free Solder (PbF: Pb free) --------------3

3 Technical Descriptions------------------------------------------5

3.1. Block Diagram ----------------------------------------------5
3.2. Circuit Operations ------------------------------------------6

4 Location of Controls and Components--------------------7

4.1. Names and Locations-------------------------------------7

5 Installation Instructions-----------------------------------------7

5.1. Installation of KX-TDA3194 (ESVM2 Card) ---------7
5.2. Installing/Removing the Optional Service

Cards ----------------------------------------------------------8

6 Troubleshooting Guide---------------------------------------- 13

6.1. OGM REC/PLAY/ERASE Cannot be USED ------ 13
6.2. Cannot USE CO-ESVM2-CO Conversation------- 16
6.3. Cannot USE CO-ESVM2-CO VOX Detection ---- 18

7 Miscellaneous ---------------------------------------------------- 20

7.1. Terminal Guide of ICs, Transistors and Diodes--- 20
7.2. How To Replace a Flat Package IC ----------------- 21
7.3. Memo-------------------------------------------------------- 21

8 Schematic Diagram--------------------------------------------- 22
9 Printed Circuit Board ------------------------------------------ 26

9.1. Component View ----------------------------------------- 26
9.2. Bottom View ----------------------------------------------- 27

10 Appendix Information of Schematic Diagram --------- 28

11 Exploded View and Replacement Parts  List ---------- 29

11.1. IC Data------------------------------------------------------ 29
11.2. Cabinet and Electrical Parts Location--------------- 30
11.3. Accessories and Packing Materials ----------------- 31
11.4. Replacement Parts List --------------------------------- 32

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• Repair service shall be provided in accordance with repair technology information such as service manual so as to pre-

vent fires, injury or electric shock, which can be caused by improper repair work.

1. When repair services are provided, neither the products nor their parts or members shall be remodeled. 
2. If a lead wire assembly is supplied as a repair part, the lead wire assembly shall be replaced. 
3. FASTON terminals shall be plugged straight in and unplugged straight out. 

• ICs and LSIs are vulnerable to static electricity.

1. Cover plastic parts boxes with aluminum foil.
2. Ground the soldering irons.
3. Use a conductive mat on worktable.
4. Do not grasp IC or LSI pins with bare fingers.

In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder that con-
tains lead.
We will use PbF when discussing the lead free solder used in our manufacturing process which is made from Tin, (Sn), Silver,
(Ag), and Copper, (Cu).
This model, and others like it, manufactured using lead free solder will have PbF stamped on the PCB. For service and repair
work we suggest using the same type of solder. 

• PbF solder has a melting point that is 50

° ~ 70° F, (30° ~ 40°C) higher than Pb solder. Please use a soldering iron with tempera-

ture control and adjust it to 700

° ± 20° F, (370° ± 10°C). 

Exercise care while using higher temperature soldering irons.:
Do not heat the PCB for too long time in order to prevent solder splash or damage to the PCB.

• PbF solder will tend to splash if it is heated much higher than its melting point, approximately 1100

°F, (600°C).

• When applying PbF solder to double layered boards, please check the component side for excess which may flow onto the

opposite side (See figure, below).

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There are several types of PbF solder available commercially. While this product is manufactured using Tin, Silver, and Copper,
(Sn+Ag+Cu), you can also use Tin and Copper, (Sn+Cu), or Tin, Zinc, and Bismuth, (Sn+Zn+Bi). Please check the manufac
turer's specific instructions for the melting points of their products and any precautions for using their product with other 
materials. 
The following lead free (PbF) solder wire sizes are recommended for service of this product: 0.3mm, 0.6mm and 1.0mm.

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CN101

DHW[1]
C4M
LD[7:0]
LA[0]

LDHW[1]
HWCLK[0]

LUHW[1]

nCSx
LA[11-10]
nHW_FH
SHW_CLK
nSHW_FH
C8K
C16K

nRD
nWR

DX0
nDSPCS
HW_FH

nDSPACK
nPDN
nDSPRST

Card_ID[7:0]

LA[3:0]
LD[7:0]
nRD
nWR

+5V
+3.3V
GND

DTMFR[0]
DTMFR[1]

CNGDET

VOX[3:0]

CS_PIO

PIO-ASIC

CO-CO
transfer

AGC,REC

DSP

IC1

IC2

Flash

Memory

CPLD

IC9

IC5

CNGSEL

IC7

CNG

detection(0)

VOX

detection(0)

VOX

detection(1)

VOX

detection(2)

VOX

detection(3)

CODEC

IC10

CODEC

IC11

KX-TDA3194XJ  BLOCK DIAGRAM