DOWNLOAD Panasonic KX-MB263RU / KX-MB263UA (serv.man7) Service Manual ↓ Size: 11.49 MB | Pages: 127 in PDF or view online for FREE

21

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

SDMAÇO

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 (RING)

L24

PIO38

O

3.3V

NOT USED

L25

PIO36

O

3.3V

NOT USED

L26

PIO35

O

3.3V

NOT USED

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

NOT USED

M25

PIO26

O

3.3V

NOT USED

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

O

3.3V

NOT USED

P25

PIO17

O

3.3V

NOT USED

P26

PIO18

I

3.3V

HIGH VOLTAGE UNIT INTERFACE

R01

SDUDM1

O

3.3V

SDRAM DQMU1

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

R15

VSS

-

GND

GND

PIN NO.

PinName

I/O

POWER SUPPLY VOLTAGE

EXPLANATION

22

R16

VSS

-

GND

GND

R23

PIO13

O

3.3V

NOT USED

R24

PIO12

O

3.3V

NOT USED

R25

PIO14

O

3.3V

NOT USED

R26

PIO15

O

3.3V

NOT USED

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

NOT USED

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

I

3.3V

INPUT PORT (HOOK)

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

NOT USED

V25

PSCIO22

O

3.3V

NOT USED

V26

PSCIO23

O

3.3V

NOT USED

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

I

3.3V

INPUT PORT (FANDET2)

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

NCU INTERFACE

PIN NO.

PinName

I/O

POWER SUPPLY VOLTAGE

EXPLANATION

23

The scanning block of this device consists of a control circuit and a CIS (contact image sensor), and AFE (Analog Front End)
include A/D Converter.

When an original document is inserted and the start button pressed, pin A3 of IC300 goes to a low level and the transistor Q518
turns on. This applies voltage to the CIS. The CIS is driven by each of  the CCDSH , CCDCLK  signals output from IC300, and the
original image illuminated by the LED to output an analog image signal. 
The analog image signal is input to the AFE on VINP(20pin of IC503) and converted into 16-bit data by the A/D converter inside
IC503. Then this signal undergoes digital processing in order to obtain a high-quality image.

24

1. Functions

All driving forces of printer engine part are supplied by this engine motor.
Engine motor is controlled so as to rotate at constant speed during printing and copying.

2. Motor operation

<Start operation>
In order to start the motor rotation, following 3 signals are supplied from IC300.
1. SS signal (Output pin: Pin B12/Output Signal: "H")
When this signal is inverted by transistor Q502 and becomes "L", motor recognize this signal as "start" signal.
2. Clock signal (Output pin: Pin A12/Output Signal: Pulse)
Pulse frequency :approx. 1.9KHz (at normal printing speed, )
Pulse frequency :approx. 0.5KHz.(at half printing speed)
This signal is also inverted by transistor Q525, and supplied to motor as "clock" signal .
3. Brake signal (Output pin: Pin C12/Output Signal: "H")
When this signal is inverted by transistor Q526 and becomes "L", motor recognize this signal as "brake off" signal.

When motor reaches constant speed, "L" signal is supplied from motor to IC300 pin B12 as "Lock detect (LD)" signal.
if "LD" signal does not becomes "L" within predetermined period after "SS" signal becomes "H",  or if "LD" signal becomes
"H" during rotation, it is judged that motor Error occurred.

Timing Chart of Start operation