DOWNLOAD Panasonic KX-NT366RU (serv.man2) Service Manual ↓ Size: 3.56 MB | Pages: 82 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 Specifications ------------------------------------------------------4

3.1. General Descriptions--------------------------------------4

4 Technical Descriptions------------------------------------------5

4.1. Block Diagram ----------------------------------------------5
4.2. Circuit Operations ------------------------------------------6

5 Location of Controls and Components------------------ 18

5.1. Name and Locations ------------------------------------ 18

6 Installation Instructions--------------------------------------- 19

6.1. Optional Accesory---------------------------------------- 19

7 Troubleshooting Guide---------------------------------------- 20

7.1. No Operation ---------------------------------------------- 20
7.2. LCD Does Not Operate--------------------------------- 23
7.3. Handset Does Not work -------------------------------- 24
7.4. Headset Does Not work -------------------------------- 25
7.5. Speaker-Phone Trouble -------------------------------- 26
7.6. Ethernet Does Not work -------------------------------- 27
7.7. LED Does Not Light ------------------------------------- 30
7.8. Bluetooth Does Not work------------------------------- 31

8 Disassmbly Instructions-------------------------------------- 33
9 Maintenance ------------------------------------------------------ 34

9.1. Terminal Guide of the ICs Transistors and

Diodes------------------------------------------------------- 34

9.2. How To Replace a Flat Package IC ----------------- 35
9.3. memo-------------------------------------------------------- 36

10 Schematic Diagram--------------------------------------------- 37

10.1. Block Diagram -------------------------------------------- 37
10.2. Main No.1 -------------------------------------------------- 38
10.3. Main No.2 -------------------------------------------------- 42
10.4. Main No.3 -------------------------------------------------- 46
10.5. Main No.4 -------------------------------------------------- 48
10.6. Jack---------------------------------------------------------- 52
10.7. LCD ---------------------------------------------------------- 53
10.8. Waveform -------------------------------------------------- 54

11 Printed Circuit Board ------------------------------------------ 58

11.1. Main Board------------------------------------------------- 58
11.2. Jack Board ------------------------------------------------- 60
11.3. LCD Board ------------------------------------------------- 61

12 Appendix Information of Schematic Diagram --------- 62
13 Exploded View and Replacement Parts List ----------- 63

13.1. IC Data------------------------------------------------------ 63
13.2. Cabinet and Electric Parts ----------------------------- 75
13.3. Accessories and Packing Materials ----------------- 76
13.4. Replacement Parts List --------------------------------- 77

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

When repairing, the following precautions will help prevent recurring malfunctions.

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

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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Design and specifications are subject to change without notice.

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Analog I/F 

HeadSet IF

Address Bus 

JK5

Data Bus 

Handset

RJ11

IC24

IC27

IC26

SW

Transistor

MIC

Speaker

CN5

CN4

JK4

KEY/LED/LCD

Bluetooth unit

Self-labeling LCD

<LCD_Boad>

CN603

LCD

CN

604

CN

602

Back

 light

CN

601

PCMSYNC1,PCMOUT,

CN

9

IC1

IC3 IC2 

SDRAM

8Mbyte

FLASH

4Mbyte

GPIO

IC20

MUTE_SP1

IC29

IC25

IC26

SW

SW

IC27

IC26

SW

SW

SW

SW

SW

HSIN

VoIP/DSP

Analog

Q1

IC21

IC28

IF

IC28

IC20

IC30

IC23

CN10

MUTE_SP2

CPU(Slave)

IC5

PCMIN,PCMCLK

PIO[3:0],RESET,

UART_TX/RX,UART_RTS/CTS

BK_LIT

CPU(Slave)

LED / Key 

IC4

SIO

PCM_I/F

HSOUT

MICIN

SPOUT

MUTE_SP0

GPIO

IC12

Reset

IC

INT

RESETn

RxRDY,OP_DET,SCLK,

RxD,TxD, RESET_OUT 

DC/DC

+4V

+3.3V

+1.5V

REG(1.5V)

Super

CAP

REG(3.3V)

DC ALARM

CN2

(For Option) 

IC10,31

IC11

C501

C502

IC8

IC13

Power I/F 

PoE chip

IC9

nRST_PHY

nRST_PHY

JK2

JK1

X1

Ethernet I/F

25.00

MHz

PULSE

Trans

PULSE

Trans

T2

RJ45

RJ45

To LAN

10/100Base-t

To PC 

10/100Base-t

KX-NT366

RU

/KX-NT366

RU

-B Block Diagram

T1

X2

+9V

DC IN

TX_EN,TX_ER,

TXD[3:0],

TX_EN,TX_ER,

TXD[3:0],

CRS

TX_CLK

RX_DV

RX_ER

RXD[3:0],

RX_CLK

TX_CLK

RX_CLK

COL

CRS

RX_DV

RX_ER

RXD[3:0],

COL

Ethernet

PHY

(KSZ8041)

IC6

Ethernet

PHY

(KSZ8041)

IC7

MAC1

MII2

MAC2

MII1

+48V

8.192

MHz

TXD,RESET,

SCLK_SELF

Self-labeling

TXD,RESET,

RXD_SUB,SCLK_SUB