DOWNLOAD Panasonic KX-MB1500RUB / KX-MB1500RUD / KX-MB1500RUW / KX-MB1520RUB / KX-MB1520RUW / KX-MB1530RUB Service Manual ↓ Size: 25.67 MB | Pages: 127 in PDF or view online for FREE

25

KX-MB1500RU/KX-MB1520RU/KX-MB1530RU

K24

PIO41

O

3.3V

MAIN MOTOR INTERFACE

K25

PIO40

O

3.3V

NOT USED

K26

PIO39

O

3.3V

NOT USED

L01

SDMD24

I/O

3.3V

SDRAM DATA BUS 24

L02

SDMD25

I/O

3.3V

SDRAM DATA BUS 25

L03

SDMA1

O

3.3V

SDRAM ADDRESS BUS 1

L04

SDMA0

O

3.3V

SDRAM ADDRESS BUS 0

L11

VSS

-

GND

GND

L12

VSS

-

GND

GND

L13

VSS

-

GND

GND

L14

VSS

-

GND

GND

L15

VSS

-

GND

GND

L16

VSS

-

GND

GND

L23

PIO37

I

3.3V

INPUT PORT (BELL)

L24

PIO38

O

3.3V

NOT USED

L25

PIO36

I

3.3V

INPUT PORT (ALC)

L26

PIO35

O

3.3V

OUTPUT PORT (CID_RX)

M01

SDMD26

I/O

3.3V

SDRAM DATA BUS 26

M02

SDMD27

I/O

3.3V

SDRAM DATA BUS 27

M03

SDMA10

O

3.3V

SDRAM ADDRESS BUS 10

M04

SDBA1

O

3.3V

SDRAM BANK ADDRESS 1

M11

VSS

-

GND

GND

M12

VSS

-

GND

GND

M13

VSS

-

GND

GND

M14

VSS

-

GND

GND

M15

VSS

-

GND

GND

M16

VSS

-

GND

GND

M23

PIO33

O

3.3V

NOT USED

M24

PIO34

O

3.3V

OUTPUT PORT (FAX_RX)

M25

PIO26

O

3.3V

OUTPUT PORT (F_MUTE)

M26

PIO25

O

3.3V

OUTPUT PORT(CNGMUTE)

N01

SDMD28

I/O

3.3V

SDRAM DATA BUS 28

N02

SDMD29

I/O

3.3V

SDRAM DATA BUS 29

N03

SDBA0

O

3.3V

SDRAM BANK ADDRESS 0

N04

VDD1.2

-

1.2V

POWER SUPPLY

N11

VSS

-

GND

GND

N12

VSS

-

GND

GND

N13

VSS

-

GND

GND

N14

VSS

-

GND

GND

N15

VSS

-

GND

GND

N16

VSS

-

GND

GND

N23

VDD3.3

-

3.3V

POWER SUPPLY

N24

PIO23

O

3.3V

NOT USED

N25

PIO22

O

3.3V

NOT USED

N26

PIO20

O

3.3V

NOT USED

P01

SDMD30

I/O

3.3V

SDRAM DATA BUS 30

P02

SDMD31

I/O

3.3V

SDRAM DATA BUS 31

P03

NSDCS

O

3.3V

SDRAM CHIP SELECT 1

P04

VDD3.3

-

3.3V

POWER SUPPLY

P11

VSS

-

GND

GND

P12

VSS

-

GND

GND

P13

VSS

-

GND

GND

P14

VSS

-

GND

GND

P15

VSS

-

GND

GND

P16

VSS

-

GND

GND

P23

VDD1.2

-

1.2V

POWER SUPPLY

P24

PIO16

I

3.3V

INPUT PORT

P25

PIO17

I

3.3V

INPUT PORT

P26

PIO18

O

3.3V

NOT USED

R01

SDUDM1

O

3.3V

NOT USED

R02

SDLDM0

O

3.3V

SDRAM DQML0

R03

BZVDD33

-

3.3V

POWER SUPPLY

R04

BZRST33

-

3.3V

POWER SUPPLY

R11

VSS

-

GND

GND

R12

VSS

-

GND

GND

R13

VSS

-

GND

GND

R14

VSS

-

GND

GND

PIN NO.

PinName

I/O

POWER SUPPLY VOLTAGE

EXPLANATION

26

KX-MB1500RU/KX-MB1520RU/KX-MB1530RU

R15

VSS

-

GND

GND

R16

VSS

-

GND

GND

R23

PIO13

O

3.3V

NOT USED

R24

PIO12

O

3.3V

NOT USED

R25

PIO14

O

3.3V

LSU INTERFACE

R26

PIO15

I

3.3V

INPUT PORT

T01

SDMD0

I/O

3.3V

SDRAM DATA BUS 0

T02

SDMD1

I/O

3.3V

SDRAM DATA BUS 1

T03

NSDCAS

O

3.3V

SDRAM CAS

T04

NSDRAS

O

3.3V

SDRAM RAS

T11

VSS

-

GND

GND

T12

VSS

-

GND

GND

T13

VSS

-

GND

GND

T14

VSS

-

GND

GND

T15

VSS

-

GND

GND

T16

VSS

-

GND

GND

T23

PIO9

O

3.3V

OUTPUT PORT (SNPICK)

T24

PIO8

O

3.3V

OUTPUT PORT (VFUSECUT)

T25

PIO10

O

3.3V

NOT USED

T26

PIO11

O

3.3V

OUTPUT PORT(SNREG)

U01

SDMD2

I/O

3.3V

SDRAM DATA BUS 2

U02

SDMD3

I/O

3.3V

SDRAM DATA BUS 3

U03

NSDWE

O

3.3V

SDRAM WRITE ENABLE

U04

VDD1.2

-

1.2V

POWER SUPPLY

U23

VDD3.3

-

3.3V

POWER SUPPLY

U24

PIO0

O

3.3V

NOT USED

U25

PIO1

O

3.3V

OUTPUT PORT(EXTRLY)

U26

PIO7

O

3.3V

NOT USED

V01

SDMD4

I/O

3.3V

SDRAM DATA BUS 4

V02

SDMD5

I/O

3.3V

SDRAM DATA BUS 5

V03

SDCKE

O

3.3V

SDRAM CLOCK ENABLE

V04

SDMA12

O

3.3V

SDRAM ADDRESS BUS 12

V23

PSCIO20

O

3.3V

NOT USED

V24

PSCIO21

O

3.3V

OUTPUT PORT (OPC_CNTCT)

V25

PSCIO22

O

3.3V

OUTPUT PORT (DRUM_LIFE)

V26

PSCIO23

O

3.3V

OUTPUT PORT (DTMFMUTE)

W01

SDMD6

I/O

3.3V

SDRAM DATA BUS 6

W02

SDMD7

I/O

3.3V

SDRAM DATA BUS 7

W03

SDMA11

O

3.3V

SDRAM ADDRESS BUS 11

W04

SDMA9

O

3.3V

SDRAM ADDRESS BUS 9

W23

PSCIO16

O

3.3V

NOT USED

W24

PSCIO17

O

3.3V

NOT USED

W25

PSCIO18

I

3.3V

INPUT PORT (TOPCVR)

W26

PSCIO19

I

3.3V

INPUT PORT (PSTART)

Y01

VSS

-

GND

GND

Y02

SDCLK

O

3.3V

SDRAM CLOCK 1

Y03

SDMA8

O

3.3V

SDRAM ADDRESS BUS 8

Y04

VSS

-

GND

GND

Y23

AFESEL0

I

3.3V

NCU INTERFACE

Y24

AFESEL1

I

3.3V

NCU INTERFACE

Y25

EXMDMCS

O

3.3V

NOT USED

Y26

DP

O

3.3V

NOT USED

PIN NO.

PinName

I/O

POWER SUPPLY VOLTAGE

EXPLANATION

27

KX-MB1500RU/KX-MB1520RU/KX-MB1530RU

1. Function

This unit has a lithium battery (BAT50) which works for the Real Time Clock IC (RTC: inside IC300).
The RTC continues to work, backed up by a lithium battery even when the power switch is OFF.

2. RTC Inside (IC300) Backup Circuit Operation

When the power switch is turned ON, power is supplied to the RTC (inside IC300). At this time, the voltage at pin AF3 of the
IC300 is +3.3V. When the power switch is turned OFF, the BAT50 supplies power to RTC through DA300. 
When the power switch is OFF and the voltage of +3.3V decreases, pin AF3 of RTC (IC300) becomes roughly the same volt-
age as the battery voltage. RTC goes into the backup mode, in which the power consumption is lower.

28

KX-MB1500RU/KX-MB1520RU/KX-MB1530RU

The modem (Included IC300) has all the hardware satisfying the CCITT standards mentioned previously.
ALL processing is controlled by the SOC (IC300) according to CCITT procedures.
This modem (Included IC300) has an automatic application equalizer. With training signal 1 or 2 at the time of G3 reception, it can
automatically establish the optimum equalizer. 

The digital image data sent on ATXD line from modem (Included IC300).
AFE IC (IC200) and analog circuit to the telephone line.

The analog image data which is received from the telephone line passes through analog circuit and enters AFE IC(IC200). The
signals are changed to digital data in AFE IC and IC300. In this case, the image signals from the telephone line are transmitted
serially. Here, the internal equalizer circuit reduces the image signals to a long-distance receiving level. This is designed to cor-
rect the characteristics of the frequency band centered around 3 kHz and maintain a constant receiving sensitivity.
In this case, the image signals from the telephone line are transmitted serially. 

The path is the same as Facsimile Reception.

This is the call signal which is generated the SOC (IC300) and sent to the speaker.