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17

The circuit which generates output +3.3V, +5V with input +15V. It is configured with the circuit that reduces the voltage from
+15V to +3.3V by IC801, Q801, D801 and L801 switching power supply, and with the circuit that reduces the voltage from +15V
to +5V by IC802, Q802, D802 and L802 switching power supply.
There are two protection lines. One is F1 for +15V short protection, the other is   the over voltage protection which detects

+3.3V/+5V voltage rise and make FET Q15 OFF.

PG

P.G

PG

P.G

PG

P.G

PG

P.G

PG

P.G

+3.3V

PG

P.G

PG

P.G

D

806

C

807

D803

C805

C

820

L802

C8

1

6

C

808

R

820

Q

801

S

D

G

L801

R817

R826

R8

1

3

Q1

6

1

6

2

L803

0

L8

1

1

C

818

C

821

D

802

D807

L8

1

0

R

812

R822

R816

D804

R8

0

2

R815

IC801

1

CE/CSS

2

VSS

3

FB

4 EXT/

5

VIN

Q1

6

4

3

5

R814

D8

0

1

IC802

1

CE/CSS

2

VSS

3

FB

4 EXT/

5

VIN

C

809

R827

D808

C8

1

7

L804

DA801

1

2

3

Q8

0

2

S

D

G

C

810

C8

1

9

C815

R

819

R

801

C806

Q1

5

S

D

G

R8

1

1

R821

R8

2

5

R8

2

4

+15VIN

+3.3V

+5V

PG

P.G

IP1

CN1

A1

+15VPTA1

B1

+15VPTB1

A2

+40V

B2

+15V

A3

POWER_GNDA3

B3

POWER_GNDB3

+15V

+15V

C

801

R810

TH1

+15VIN

18

Three power input systems from the main power voltage; +15V, +30V and +40V. 
The power voltage which is used in the main circuit is +15V, +5V and +3.3V, so it generates and use the power voltages in the
circuit below.

+15V Input

OP Amp(IC1A-IC1H,  IC1I-IC1P)

CPU(IC401), Flash(IC402), SRAM(IC403)
ASIC(IC3)
Caller ID ASIC(IC308, IC409 / IC508, IC609)

CODEC(IC6, IC7/IC6, IC7)

+3.3V

+5V

19

Basic Shelf

(KX-TDA600 / KX-TDE600)

Expansion Shelf

(KX-TDA620 / KX-TDE620)

Basic Shelf

(KX-TDA600 / KX-TDE600)

Expansion Shelf

(KX-TDA620 / KX-TDE620)

EMPR/IPCMPR Card

Free Slots

BUS-M Card Slot

PSU Slot

BUS-S Card

Free Slots

PSU Slot

20

To protect the back board from static electricity, do not touch parts on the back board in the main unit and on the optional service
cards.To discharge static, touch ground or wear an earthing strap.

16-port analogue trunk card with CallerID function and 4 power failure transfer (PFT) ports.

Accessories (included): Screws X 2

User-supplied (not included): Amphenol connector

•To connect the amphenol connector, refer to " Fastening Amphenol Type Connector ".
•For details about power failure transfer, refer to " Power Failure Connections  ".

•To confirm the trunk connection, refer to "Confirming the Trunk Connection" in " Starting the PBX ".

Card Type

Slot Type

KX-TDA600 / KX-TDE600

KX-TDA620 / KX-TDE620

Free 1-10

EMPR

BUS-M

Free 1-11

BUS-S

EMPR  Card

No

Yes

No

No

No

BUS-M Card

No

No

Yes

No

No

BUS-S Card

No

No

No

No

Yes

Trunk Cards

Yes

No

No

Yes

No

Extension Cards

Yes

No

No

Yes

No

OPB3 Card

Yes

No

No

Yes

No

CTI-LINK Card

Yes

No

No

No

No

EECHO Card

Yes

No

No

Yes

No

Amphenol

To trunk

LED