Brother 190 Sm 04

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III 17

3. CONTROL ELECTRONICS

3.1 Configuration

The hardware configuration of the facsimile equipment is shown below.

Line

Handset

Speaker NCU PCB

FAXengine

*2

2-pin 2-pin

(Note)

J1J2

J3 4-pin

P1P2

2-pin

P4 6-pin

P3 2-pin

P12 P10

2-pin 6-pin

P8 12-pin

P7 7-pin

P6 5-pin

Main PCB

*1

Configuration of Facsimile Equipment

Controlpanel PCB

LCD

CIS unit 13-pin

Power supply PCB

Recording head

Cutter HPsensor

Motor

SolenoidDrive unit

Externaltelephone

FPC key

(Note)

12-pin: U.S.A. versions18-pin: European versions

*1 On the main PCB are these sensors:

PE sensor (SW1) Cover sensor (SW2) Hook switch sensor (SW3) (This sensor serves no

function in those versions equipped with a Binatonehandset.)

Document front sensor (PH1) Document rear sensor (PH2)

*2 On the drive unit is the cutter HP sensor.

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III 18

3.2 Main PCB

The main PCB, which is the nucleus controlling the entire operation of the equipment, con-sists of a FAX engine (ASIC), memories, MODEM, motor drive circuitry, sensor detection cir-

cuitry, and analog circuits for scanning, recording, and power transmission shifting.

E2PROM: Electrically Erasable Programmable Read-only MemoryPSRAM: Pseudo Static Random Access Memory

ROM

E2PROM

PSRAMFAX

engine

(ASIC)Motordriver

Sensors

Automatic

cutter

Speaker

Powersupply

NCU

Recording head

Control panel

Motor

CIS

Block Diagram of Main PCB

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III 19

Main PCB Circuit Diagram 1/4

1 SW3, hook switch sensor (microswitch) (This sensor serves no function in those ver-sions equipped with a Binatone handset.)

2 SW2, cover switch sensor (microswitch)

3 SW1, paper empty sensor (microswitch)

4 Reset IC which turns on at the powering-on sequence and at any of the reset opera-tions.

5 Connector for the control panel6 FAX engine (ASIC) which integrates a CPU, digital portion of a MODEM and gate array

for managing the I/Os, memories, and drivers.

7 XT2, oscillator which oscillates at 16 MHz for the CPU.

8 XT1, oscillator which oscillates at 32.768 kHz for the calendar clock.

9 XT3, oscillator which oscillates at 20.736 MHz for the MODEM.

: Connector for the cutter HP sensor

a Backup circuit for the calendar clock of the control panel

1

2

3

4

5

6

7

8

9

:

a

FAX-170/190/510/HOME FAX

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III 20


1 E2PROM (16k x 1 bit in the European versions, 8k x 1 bit in other versions)

2 ROM (128k x 8 bits. Note that the qualification machines for demonstration have a 2-megabit ROM.)

3 PSRAM (32k x 8 bits)

4 Not mounted.

1

2

34

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III 21


1 Connector for the CIS

1-1: Power for the CIS LED array

1-2: Clock output

1-3: Trigger signal output. One shot of this signal triggers a line of scan.

1-4: LED control signal output circuit which controls the intensity of the CIS LED ar-ray.

1-5: Input of video data (VID) to the FAX engine

1-6: Clamp circuit that gives the bias level to the amplifier of the VID input circuit ac-cording to the CLAMP and CLPWM signals issued by the CPU (that monitorsthe current video data input) for compensating the DC component of video sig-nals for the next scan line

2 Connector for the thermal recording head

2-1: Power 26V for the thermal recording head

2-2: Thermister signals which are normalized by the resistor network and fed to theFAX engine

2-3: Strobe signals

2-4: Data signals

2-5: Power 5V for the logic circuit of the thermal recording head

3 Connector for the motor

4 Connector for the solenoid (that switches the power transmission)

1 1-4

1-5

1-6

2

1-11-21-3

3

4

5-1

5-2

5-3

5-4

6

6-1

2-12-22-32-42-32-5

6-2

5

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III 22

5 Transistor array which consists of seven transistors

5-1: Transistors that control the rotation direction of the motor according to the MM4through MM1 signals.

5-2: Transistor that turns on and off the solenoid.The combination of the solenoid state and the motor rotation direction deter-mines to which the motor torque should be transmitted, the cutter, the documentfeeding mechanism, or the paper feeding mechanism.

5-3: Transistor that turns on and off the CR1 relay for switching on and off the +26Vpower source to the thermal recording head.

5-4: Transistor that turns on and off the CML relay.

6 Document front and rear sensor circuitry that is active only while the SEON signal is on.

The LEDs for the sensors are driven by the +26V source.

6-1: PH2, document rear sensor

6-2: PH1, document front sensor

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III 23


1 Connector for the power supply PCB

1-1: CR1, recording head on/off relay

2 3-terminal regulator which eliminates unstabilized components of the +8V source togenerate stabilized 5V source.

3 Connector for the NCU

3-1: Power for the NCU3-2: Signals from the telephone

4 Analog signal selectors

4-1: Selects either input signals from the handset or those from the MODEM.4-2: Selects either RL1 or RL2 signals inputted from the communications network.4-3: Selects either sound signals (e.g., alarm beeps, key clicks and ringer sounds) generated

by the FAX engine or signals selected by4-2.

5 Amplifier circuit for signals outputted from the MODEM.

6 Analog front end IC which processes the analog I/O signals from/to the MODEM.

7 Amplifier & shaper circuit for signals inputted from the communications network.

8 Telephone circuit for transmitting signals.

9 Speaker amplifier circuit which amplifies sounds issued from the above analog signalselector4-3 and feeds them to the speaker.

: Connector for the speaker

a Speaker volume control circuita-1: VOL1 OFF ON ON

a-2: VOL2 OFF OFF ON

Speaker volume High Medium Low (ON: Closed OFF: Opened)

1

1-1 2

3

3-2

3-14-1

4-2

4-3

5 6

7

8

9:

a

a-1

a-2

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III 24


1 SW1, hook switch sensor (microswitch)

2 SW2, cover switch sensor (microswitch)

3 SW3, paper empty sensor (microswitch)

4 Reset IC which turns on at the powering-on sequence and at any of the reset opera-tions.

5 Connector for the control panel

6 FAX engine (ASIC) which integrates a CPU, digital portion of a MODEM and gate arrayfor managing the I/Os, memories, and drivers.

7 XT2, oscillator which oscillates at 16 MHz for the CPU.

8 XT1, oscillator which oscillates at 32.768 kHz for the calendar clock.

9 XT3, oscillator which oscillates at 57.6 MHz for the MODEM.

: Connector for the cutter HP sensor

P I O 1

S E O N ( O D )

S P S L ( S M C )

C I

T L O F

H O O K

S T D

C M L

D P S

P L S

L N C R ( C O M P )

T E L

R S T

S O L ( O D )

S E N 2

S E N 3

S E N 4

S E N 5

S E N 6

S E N 7

S E N 8

E X T L

X T L

I O R D

I O WE

P I O 2

E I T 1

A V D D

C P 1 I

C P 3 I

C P 4 I

C P N N

R D A 6

R E F H

R E F L

A V D D

A 0

A 1

A 2

A 3

A 4

A 5

A 6

A 7

A 8

A 9

A 1 0

A 1 1

V D D

V D D

V D D

V D D

V D D

V D D

P I O 5

E 2 C S

R D A T

T G

D I F

C L 1

C L 2

R B

R D A 6 1

S T 1

S T 2

H D C

D I N

D O U T

R M 1

C T X D

L I G T ( P WM )

P I O 6

P I O 4 ( O D )

P I O 3 ( S R A M )

P 0 3 ( O D )

P C L K

S D O U T

R A S 0

B A R M R D

R M R D

R M WE

R O M C

C R X D

C K S

T X D

R X D

C T S

P WO N

R T C C O N

R V D D

D M T

D M K

A D M D

A A M D

C 0

C 1

C 2

A M U T

D 0

D 1

D 2

D 3

D 4

D 5

D 6

D 7

V S S

V S S

V S S

V S S

V S S

V S S

V S S

V S S

V S S

# 8

T 7 D 6 0

4 4

1 4 3

1 4 1

7 0

7 2

1 2 4

1 2 3

1 2 2

1 7 7

1 7 6

1 7 5

1 2 1

1 8 4

1 6 6

1 6 7

1 8 3

8 8

1 9 3

1 9 4

1 9 2

1 9 5

1 8 7

1 8 8

1 8 9

5 7

1 9 1

8 0

1 0 7

8 2

8 3

1 8

1 7

2 0 8

2 3

2 0

2 0 4

2 6

2 0 3

1 0 3

6 9

4 1

1 0 8

1 8 6

9 2

9 1

9 4

9 0

1 0 2

1 0 4

1 0 1

9 8

9 5

1 0 0

5 2

1 8 2

5 1

5 6

5 5

5 4

5 3

5 0

4 9

4 8

5 8

1 5

3 8

6 0

8 1

9 6

1 0 5

1 1 9

1 4 2

1 0

4 3

9 7

1 1 4

1 3 2

2 0 1

1 2 7

1 2 8

1 2 9

1 3 0

1 3 1

1 3 3

1 3 4

1 3 5

1 3

1 2

1 1

1 6

1 4

6

5

1 3 6

1 3 7

1 3 8

1 3 9

1 4 8

1 4 9

1 5 0

1 5 1

1 5 2

1 5 3

1 5 4

1 5 5

1 5 7

1 5 8

1 5 9

1 6 0

1 6 1

1 6 2

1 6 3

4 5

4 6

1 6 9

1 7 1

1 7 0

1 6 8

1 7 2

1 7 3

1 7 4

1 2 5

1 2 6

1 4 5

1 4 6

1 4 0

1 4 4

6 4

6 1

2 0 2

1 9 9

1 9 6

1 9 7

1 9 8

A B U S 2 6 B , 3 4 D

M O D E M T B U S

4 8 A , 5 8 D

G N D

G N D

+ 5

A M U T E

D A 1

D A 2

D A 3

D A 4

D A 5

D A 6

D A 7

D A 8

D A 9

D 0 0

D 0 1

D 0 2

D 0 3

D 0 4

D 0 5

D 0 6

D 0 7

T S T B

I N T

B S R Q

B S A K

N M I

W A I T

R F S H

M 1

I O R Q

M R E Q

R D

WR

C K 1 6

C K 8 M

A 0

A 1

A 2

A 3

A 4

A 5

A 6

A 7

A 8

A 9

A 1 0

A 1 1

A 1 2

A 1 3

A 1 4

A 1 5

M A 1 6

M A 1 7

M A 1 8

T S T A

R V D D

4 6 D R N G L

3 3 C C L A M P

3 4 C , 3 2 A T G

3 2 E S T 1

3 2 E S T 2

3 3 A L I G T

+ E 5

4 7 E V O L 3

3 3 D C P 3 I

4 3 A T E L L

1 5 B P C L K

4 2 F T L O F 2

1 2 B C O V E R

4 2 F E A T

4 2 D O T O

5 3 B C L S E L

2 5 B L O N

S P O N4 0

E 1 C S1 0 6

4 2 F C I

4 2 F T L O F

X T 2

C S T 1 6 . 0 0 M X

X T 1

3 2 . 7 6 8 k H z

C L C I

O D P I O 0

O D P I O 1

O D P I O 2

F C S 2

1 7 8

1 7 9

1 8 0

3 7

R S T L 1 4 A

C L R S T

C L C K

C L T X S

2 3 F S O L R M 32 8

R M 42 9

3 9R I N G

R 5 20

C 4 0

1 0 4

C 4 2

1 2 P

( R 8 2

N O P A T T R N )

( R 8 5

P A T T R N

S H O R T )

L 1 5

M M Z R 6 0 1 A

C 5 7

1 0 4

C 6 2

1 0 4

C 4 5

1 0 4

C 5 3

1 0 4

8 9P O 1

V D D

1 4 7

V D D1 6 5

4 7A G N D V S S

1 5 6

P O 2

M O N M D C K

M I O 3

M I O 1 1

M V S S

D A 0

C 1

C 2

A A P D M D

A D P D M D

D P D M C K

D P D M D T

M I O 0 ( P WM )

M I O 1 ( P WM )

1 8 5

7 6

7 7

7 8

7 9

3 0

3 1

3 2

1 0 9

1 1 0

1 1 1

1 1 2

1 1 3

1 1 5

1 1 6

1 1 7

1 1 8

1 2 0

C 3 0

1 0 4

C 3 6

1 0 4

P A N E L

P 6

B 5 B - P H

W H I T E

G N D G N D

5

1

3

2

4

R 9 5 4 7 0

C 7 6

1 0 1

C 7 4

1 0 4

# 8

T 7 D 6 0

E 0 V

C 0

R E X T

4

6 2

D A B U S2 6 B , 2 6 E

D A 0

D A 4

D A 5

D A 6

D A 7

D A 8

D A 9

2 0 7

G N D

X T 3

5 7 . 6 M H z

R 5 0

2 2 0

C 4 3

5 P

C 4 3

5 P

M T X L2 0 6

M E X T L

G N D

P 5

N C

+ 5 B

G N D

Q 6

R H 5 V A 4 3

V C C

O U T

G N D

R S T L 1 6 A , 3 6 D , 4 7 B , 1 4 B , 5 7 E

D A 3

D A 2

D A 1

R 5 1

1 0 0

C 1 1 7

1 0 4

C 3 9

1 0 4

9 3

D B U S 2 5 E , 3 6 D

+ 5 M

R 1 4 3

R 1 4 0

P B U S

1 7 B

C 5 1

1 0 4

R 9 7

N C

+ 5

G N D

4 3 B T A D H

4 3 E P L S

C 3 5

1 0 1

1 2 B P E

G N D

3 3 C C L P WM

3 8 E P W O N

1 5 B S D I N

3 6 C R D A T

2 7R M 2

R 1 0 1 4 7 0

C 8 4

1 0 1

C 8 2

1 0 2 B

4 2 F D A S T

3 4 C S M C

R X T6 3

4 3 D D A R E C

R 3 4 1 0 K1 9

M I O 2 ( P WM )

3 6 B R E A R

5 2 C C L B S Y

1 7 C H O O K

R 6 3 N C

R 6 9 1 0 K

2 5 D R A S 0

B A R M R D

+ 5

3 6 D S E O N

4 2 E R D P S

C M L H

+ 5

L 1 3

M M Z R 6 0 1 A

C R X D

C K S

T X D

R X D

C T S

E 5 V

E 0 V

R 3 9

7 5 F

C 3 2

1 0 4

R 4 9

7 5 F

R 4 6

1 0 0 F

C R X D

C T S

R X D

T X D

C K S

+ 5

G N D* P 1 3

8 7 1 8 0 - X 8 8

2

3

P C I

4

7

5

1 6 B P B U S

1

8

6

3 2 E H D C

3 2 A R B

3 4 C S R A M

5 4 A C T S E L

C 7 9

1 0 1

1 6 4

2 0 0

V S S

V D D1 9 0

A G N D5 9

C 53

2

1

C 4

C 3C 5

C 4

C 3

4 2 F R S T L

4 6 E V O L 1

1 5 B S D O T

1 2 B S D I N

1 2 B P C L K

1 2 B S D O U T

A P D M D T

A P D M C KA M K

A M T

9

8

M U T E7 M U T

R 1 4 1

9 9C L B

4 2 F D A S N O

R 9 6 1 0 K

2 2M I O 5

2 4M I O 1 2

G N D

2 1M I O 4

4 6 E S P O N

4 5 D H A F H

4 4 D T X S L

3 7 C F R N T

5 2 D C L R X S

S D I N

1 4 A R S T L

7 3B A E N B

6 6C K 3 2

6 8B A K C L K

7 4B A V D D

6 5B A K S E L

2 5M I O 1 3

2 0 5M V D D

+ 5

+ 5

M M 3

S B U S 3 4 D

M M 2

M M 1

M M 2

M M 3

M M 4

8 4

8 5

8 6

8 7

WR

M M 4

M X 0 V

T C 7 4 V H C U 0 4 F S

# 9

4 1 1 7

1 4

C 3 8

1 0 4

+ 5

35

# 9 T C 7 4 V H C U 0 4 F S

1 38 9 1 2

R 4 7 4 . 7 K

O D P I O 31 8 1

O D P I O 44 2

F D C L K3 3

F D O U T3 4

F D I N3 5

F C S 13 6

6 7C K 3 2 O N

4 2 F A D L C

E 0 V

R 4 5

1 0 K C 3 3

1 0 4

R 6 0

2 2 K

* R 7 8 N C

R 6 5 N C

V O L 2 4 6 E

M M 1

I O R Q

C K 1 6

R D

M B U S 2 3 C

M R E Q

R 9 2

2 0 0

2 5 B E P D O

C 3 4

1 0 4

3 2 E D O U T

3 4 C E 1 C S

3 2 E D I N

+ 5

G N D

R 1 4 4 1 0 K

R 1 4 2

+ 5

C 4 9

1 0 4

+ 5 V

R 5 5 1 0 0

G N D

C 5 0

1 0 2 B

+ 5 B

4 5 E R N G O

C 3 7

1 0 4

C 4 8

N C

G N D

R 6 6 N C

L 1 6

3 0 0

2

1

3

R 5 3

1 . 5 K

13

2

R A 2

R A 2

R A 3

R A 3

R A 2

R A 2

R A 3

R A 3

2 0 0 ( X 4 )

2 0 0 ( X 4 )

R 1 4 6 2 0 0

R 1 4 5 2 0 0

2 0 0

2 0 0

1 0 0

1 0 0

7 5C A S2 5 D C A S

7 1B A R M WEB A R M WE

R A 1

R A 1

R A 1

R A 1

2 0 0 ( X 4 )

R 1 3 9 1 0 0

R M R D

R O M C

R 9 4 1 0 0 K

R 7 4 0

M X 0 V

E P C L K

* L 1 1

* L 7

* L 1 0

* L 5

* L 2

* L 9

* L 6

* L 8

+ 5

C 1 1 8

N C

G N D

+ 2 6 V

R 3 8

7 5 K

+ 5

R 1 0 2

1 K

* C 6 7

N C

G N D

1

2

P 1 2

B 2 B - P H

W H I T E

C U T T E R

L 4

N . C

G N D F G

4 1

3 2

1 4

2 3

1 4

2 3

R 1 0 3

4 . 7 K

R 9

4 . 7 K

R 2 7

4 . 7 K

+ 5

G N D

S W3

S W2

S W1

S W - 1 6 2 x 3

1 6 C H O O K

1 3 D C O V E R

1 3 D P E

* C 8 0

0

+ E 5+ 5 + E 5+ 5

G N D E 0 V

0 X 8

G N D

G N D

+ 5

L 2 0

0

* C 2 7

0

3 3 B V I D

L 3

0

G N D

C 4 7

1 0 P

1

1 2 3 4 5 6 7 8

21 3 4 5 6 7 8

A

B

C

D

E

F

A

B

C

D

E

F

Not mounted.

1

2

3

5 4

7

8

6

9

:

FAX-270MC/290MC/520DT/520MC/MFC370MC/390MC

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III 25


1 E2PROM (16k x 1 bit)

2 ROM (256k x 8 bits. Note that the qualification machines for demonstration have a 2-megabit ROM.)

3 DRAM (512k x 8 bits)

4 Backup circuit for the calendar clock of the control panel and DRAM.

1 4 D

A 0

A 1

A 2

A 3

A 4

A 5

A 6

A 7

A 8

A 9

A 1 0

A 1 1

D A 3

D A 4

D A 5

D A 6

D A 7

D A 8

D 0

D 1

D 2

D 3

D 4

D 5

3 0

2

3

2 9

2 8

4

2 5

2 3

2 6

2 7

5

6

7

8

9

2 1

2 0

1 9

1 8

1 7

1 0

1 1

1 2

1 5

1 4

1 3

# 1 3

P D 2 7 C 2 0 0 1 A

A 1 7

A 1 6

A 1 5

A 1 4

A 1 3

A 1 2

A 1 1

A 1 0

A 0 9

A 0 8

A 0 7

A 0 6

A 0 5

A 0 4

A 0 3

A 0 2

A 0 1

A 0 0 D 0

D 1

D 2

D 3

D 4

D 5

D 6

D 7

B A T

1

2

P 1 6

B 2 B - P H

O U T

G N D

R H 5 R A 4 7

A 0

A 1

A 2

A 3

A 4

A 5

A 6

A 7

A 8

A 9

N C

V C C

I / 0 3

I / 0 1

I / 0 0

I / 0 2

G N D

G N D

D A 0

D A 1

D A 2

D A 3

D A 4

D A 5

D A 6

D A 7

D A 8

D A 9

D 3

D 2

D 1

D 0

1 4

1 5

2 8

9

2 0

1 9

1 8

1 7

1 6

1 3

1 2

1 1

1 0

2

3

4

5

2 1

+ 5 B

# 1 4

H M 5 1 4 8 0 0 J P

2 7

2 6I / 0 7

I / 0 5

I / 0 4

I / 0 6

D 7

D 6

D 5

D 42 4

2 5

1V C C W

0 E

N C6

1 4 ED B U S

D A B U S

D A 9

D 6

D 7

A B U S1 7 D

2 2 R O M C1 6 B

- 0 E

- C E

1 6 BR M R D2 4

- P G M3 1

+ 5

R 1 0 9

N C

( D S : 0 )V C C

V P P

G N DG

N

D

3 2

1

1 6

C 7 7

1 0 4

+ 5

1 0 4

C

B

6

G N D

R A S 01 6 A

C A S1 6 A

B A R M WE1 6 A

B A R M R D1 6 B

C A S

R A S

+ 5

8

6

1

2

3

4

V C C

N C

S C L

S D A

A 2

A 1

A 0

1 6 E E P D 0

1 7 E E P C K

C 2 9

1 0 4

5

V S S

R 4 2

7

+ 5

G

N

D

2 4 L C 3 2

* # 74 . 7 K

P 1 6

P 1 6Q 7

V C C

G N D

+ 5 B

C 7 2

1 0 V 1 0 0

+ 5

R

1

1

3

N

C

L 1 7

0

G N D

G

N

D

+

5

R V D D

D 5

N C

R 7 6

N C C 6 4

N C

0

1

3

2

0

L 1 9

L 1 8

R 1 0 4

1 K

C 9 2

1 0 4

1 2

3

D A 1

1 S S 3 7 8

+ 9 V

R 1 0 9

0

( D S : N C )

1 2 3 4 5 6 7 8

21 3 4 5 6 7 8

A

B

C

D

E

F

A

B

C

D

E

F

2

3

4

1

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III 26


1 Connector for the CIS

1-1: Power for the CIS LED array

1-2: Clock output

1-3: Trigger signal output. One shot of this signal triggers a line of scan.

1-4: LED control signal output circuit which controls the intensity of the CIS LED ar-ray.

1-5: Input of video data (VID) to the FAX engine

1-6: Clamp circuit that gives the bias level to the amplifier of the VID input circuit ac-cording to the CLAMP and CLPWM signals issued by the CPU (that monitorsthe current video data input) for compensating the DC component of video sig-nals for the next scan line

2 Connector for the thermal recording head

2-1: Power 26V for the thermal recording head

2-2: Thermister signals which are normalized by the resistor network and fed to theFAX engine

2-3: Strobe signals

2-4: Data signals

2-5: Power 5V for the logic circuit of the thermal recording head

3 Connector for the motor

4 Connector for the solenoid (that switches the power transmission)

+

2

6

V

R B 1 3 E

1 3 D

1 3 D

G N D

+ 5

C I S

P 7

B 7 B P H

1

3

9

5

4

T M

3

7

8

P 8

B 1 2 B P H

R 1 0 5

3 3 K F

R 1 0 6

1 0 0 K F

T G 1 3 E

7

2

6

2

1 0

D O U T

1 3 D

1

R 1 1 2

1 2

6

R 1 0 8

8 . 2 K F

R 1 2 6 7 5 0

R 1 2 3 7 5 0

R S T H A T A P

P O R T 0

P O R T 1

A I N

T E M P

T R I G

P D 6 / S D C K

C L K 2

P D 4 / P P 4

D A C K / P P 7

D 7

D 6

D 5

D 4

D 3

D 2

D 1

D 0

4 2

3 9

4 0

3 1

3 4

3 3

4 7

4 8

5 1

5 2

5 3

5 7

6 0

2 7

2 2

2 1

2 5

1

2

3

4

1

2

3

4

# 1 5

L C 8 2 1 0 2

1 7 B

1 9

A 3

A 2

A 1

1 6

1 8

2 3

5 4

5 5

S H6 3

D R E Q / P P 65 8

M T P / P P 55 9

I C L K

I O C S

M C S

I O E

M E

R D

3 7

R S T L

A D R E F L

3 8

3 6

4 6

A G N D

A G N D

A 0

M M 1

D 7

D 6

D 5

D 4

M M 4

M M 3

M M 2

P O R T 3

S A M P

P D 7 / S D

1 5 A

R S T L

A 3

A 2

A 1

C K 1 6

I O R Q

R D

WR

M R E Q

1 3 D S M C

A V D D

A 0

WR

C L K I N

R E S E T

V D D

V D D

V D D

D G N D

D G N D

D G N D

D G N D

D G N D

R

0

V

R 1 2 2

1 5 0

C 9 9

1 0 4

C 1 0 7

1 0 4

R 1 2 8

7 5

R 1 3 3

3 9 0

+ R 5

V I D3 3 C , 3 2 B

4 3

T G3 2 B

S B U S

C 1 0 2

1 0 4

+ R 5

R

0

V

2 0

1 3 D E 1 C S

1 6 E S R A M

3 0

2 9

2 8

A 7

A B U S

A 7

A 6

A 5

1 1

1 3

1 4

1 5 A 4

1 2

A 81 7 D

A 4

A 8

A 6

A 5

1 7 C

2 4

5 6

9

1 7

2 6

4 9

6 4

C

1

1

0

1

0

4

C

1

0

0

1

0

4

C

9

6

1

0

2

B

G N D

P O R T 2

P D 5 / S D E

P D 3 / P P 3

P D 2 / P P 2

P D 1 / P P 1

P D 0 / P P 0

C L K 1

R S

C 1 0 5

1 0 4 C 1 0 5

1 6 V 1 0

R 0 VR D A T

1 6 C

5 0

G

N

D

6 1

6 2

M B U S

1

2

3

4

5

6

P 4

B 6 B P H

0 1

0 2

0 3

0 4

0 5

0 6

0 7

I N 1

I N 2

I N 3

I N 4

I N 5

I N 6

I N 7

+ 2 6 V

+ 2 6 V

1

2

4 2 A

4 1 E

P O N

C M L L

P 3 B 2 B P H

# 1 2

T D 6 2 0 0 3 P

1 6

1 5

1 4

1 3

1 2

1 1

1 0

D B U S

8

D 1

D 2

D 3

D 0

1 4 E

5

6

7

1 3 E

1 6 D

1 6 D

5

6

7

S O L

P WO N

C M L H

P 0 V

8

G N D

Z D 3

M T Z J 8 . 2

Z D 4

M T Z J 8 . 2

+ 2 6 V

.9

C O M

4 1

4 5

4 4

3 5

3 2

1 0+ 5

+

R

5

R 0 V

C 1 0 1

1 0 4

Q 1 1

D 2 0 9 6

R 1 3 6

N C

R 1 2 7

1 0 0

R 1 1 5

5 6 K

R 1 1 7

3 . 3 K

1 3 B L I G T

R 1 2 0

2 . 2 K

C 9 8

1 0 4

+

5

G N D

R 1 3 1

1 0 0

R 1 3 5

1 / 4 W

1 8

R 1 2 9

1 W

2 7

Q 1 3

D T D

1 1 3 Z K

L O N1 6 D

P 0 V

* R 1 1 6

0

V I D3 7 B

* Q 1 0

R 0 V

* C 9 7

N C

N C

R

1

1

9

1

0

K

R 0 V

D

S

G

*

R

1

1

8

N

C

* Q 9

N C

+ R 5

* R 1 1 0

N C

C L A M P

1 6 D

G N D

* C 9 5

N C

* R 1 1 4

N C

C L P WM1 6 D

* R 1 1 1

N C

+ 5

*

C

1

0

4

N

C

*

R

1

2

4

0

* R 1 2 1

N C

+ R 5

* R 1 3 4

0

* R 1 3 7

N C

5

6 # 1 6

N J M 2 1 1 4

R 0 V

1 2

* R 1 2 5

N C

* C 1 0 3

C 9 0

R 1 M

R 0 V

* Z D 5

N C

* D 6

N C

+ R 5

* R 1 3 2

N C

R 0 V

V I D

V I D

3 7 B

1 3 C

R 0 V G N D

+ 5+ R 5

C

1

0

9

1

0

4

R 0 V

+ 2 6 V

R 1 3 0

8 2 0

1 / 2 W

R 0 V

C 1 0 8

1 0 4

+ 5

1 3 E

1 3 D

+ 5

+ 5

+ 2 6 V

C 5 6

G N D

N C

R 6 2

1 / 2 W

2 . 4 K

S G - 1 0 5 F 3 0 8

P H 1

S G - 1 0 5 F 3 0 8

P H 2

1 3 ES E O N

Q 3

G N D

K R C 1 0 7 S

G N D

R 3 0

1 0 0 K

R E A R

R 3 7

1 0 0 K

F R N T

4

5

1 1

H 2 6 V

R 0 V

C P 3 I1 2 E

C 9 3

1 0 2 B

G N D

S T 21 3 D

C 9 4

1 0 2 B

1 0 0

1 3 D

D I N

C 8 1

1 0 0 PR 9 8

1 5 0

L 1 4

M M Z Y 6 0 1 B

H D C

S T 1

C 8 5

1 0 2 B

G

N

D

+ 5

C 9 1

1 0 4

C 8 8

1 0 4

C 8 7

N C

P 0 VG N D

C 8 3

1 0 0 P

# 1 6

N J M 2 1 1 4

8

4

M O T O R

S O L

7

1

2

3 # 1 6

N J M 2 1 1 4

0

Not mounted.

* Q 8

N C

1 2 3 4 5 6 7 8

21 3 4 5 6 7 8

A

B

C

D

E

F

A

B

C

D

E

F

+

-

+

-

11-11-21-3

1-6

1-4

1-5

3

4

5

6

6-1

6-2

5-15-25-35-4

2-1

2-2

2-3

2-4

2-3

2-5

2

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III 27

5 Transistor array which consists of seven transistors

5-1: Transistors that control the rotation direction of the motor according to the MM4through MM1 signals.

5-2: Transistor that turns on and off the solenoid.The combination of the solenoid state and the motor rotation direction deter-mines to which the motor torque should be transmitted, the cutter, the documentfeeding mechanism, or the paper feeding mechanism.

5-3: Transistor that turns on and off the CR1 relay for switching on and off the +26Vpower source to the thermal recording head.

5-4: Transistor that turns on and off the CML relay.

6 Document front and rear sensor circuitry that is active only while the SEON signal is on.

The LEDs for the sensors are driven by the +26V source.

6-1: PH1, document rear sensor

6-2: PH2, document front sensor

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III 28


1 Connector for the power supply PCB

1-1: CR1, recording head on/off relay

2 3-terminal regulator which eliminates unstabilized components of the +9V source togenerate stabilized 5V source.

3 Connector for the NCU

3-1: Power for the NCU

3-2: Signals to the telephone

3-3: Signals from the telephone4 Analog signal selectors

4-1: Selects either input signals from the handset or those from the MODEM.

4-2: Selects either RL1 or RL2 signals inputted from the communications network.

4-3: Selects sound signals (e.g., alarm beeps, key clicks and ringer sounds) gener-ated by the FAX engine, hands-free monitor signals, or voice playback signals.

5 Analog signal selectors

5-1 Selects either signals gated by4-2 or voice signals coming from the handset.

5-2 Selects either signals gated by4-2 or voice playback signals.

5-3 Selects either signals gated by4-2 or hands-free monitor signals.

6 Amplifier circuit for signals outputted from the MODEM


8 Amplifier & shaper circuit for signals inputted from the communications network.

9 Telephone circuit for transmitting signals.

-

+

1

2

S P

P 1

B 2 B P H

P 1 0

B 5 B P H

# 4

B A 1 0 3 2 4 F

# 4

B A 1 0 3 2 4 F

+ 5

* R 5 4

1 K

1 0 4

* R 1 1

X C O M1 4

A

B

5

6

7

9

1 0

1 1

1 2

1 3

# 2

7 4 H C 4 0 5 3 F

C

I N H

1 4 C

M U T

D M K

D M T

A M K

A M T

C 3

C 4

C 5

-

+

G N D

* C 1 0

C 5 2

1 0 3 B

1 6 C

1 2 B D A S N D

S L 4 4 C

C 2 6 6 8 1

R 2 8 5 6 K

1 6 C

1 2 C D A S T

1 6 C R D P S

1

4

1 0

1 2

7

8

9

3

2

1 6

1 7

1 8

4

1 3

1 4

1 5 1 3 D T L 0 F 2

R 2 3

R 5 7

2 2 K

2

1

5

6

P O WE R

5

6

3

1 1

+

2

6

V

O J E S H 1 2 4 D M

C R 1

4 1

3 2 P O N

+

9

V

R

1

4

8

N

C

P

0

VC 6 1

1 6 V

4 7

+ 5 + 2 6 V

G

N

D

T E L R L4 7 A

R L 2

R L 1

T E L S L

4 4 C

4 4 C

5 2 B

5 5 D

R 3 5

1 / 1 0 W

1 K

G N D

8

9

1 0 R 2 0

1 K

+ 5

+ 2 6 V

R 3 3

N C

Z D 2

C 1 0 5

G N D

R 5 8

1 K

1 6 C P L S

3 4 E C M L L

1 6 C E A T

1 6 C A D L C

+ 5

R 6 8

2 2 K

T L O F

C I

+ 2 6 V

R 1 4 7

2 W

1 K

C 8 9

3 5 V

3 3

P 0 V

+ 9 V

C 4 6

1 0 4

1

2

3

Q 5

7 8 0 5

I N O U T

G N D

C 4 4

1 0 4

C 7 0

1 6 V

4 7

+ 5

# 4

B A 1 0 3 2 4 F

R 1 0 4 3 K

-

+

5 2 A T R L

C 1 7

1 0 3 B

* R 1 4

1 0 0 K

1 2 0 K

1 3

1 2

1 4

D 3

1 S S 1 2 0

D 1

1 S S 1 2 0

0

* D 4 N C

* R 3 6

0

* D 2 N CR 4 4

1 . 5 K

T E L R L

4 1 C

C

B

E

Q 4

K T C 3 8 7 5

G N D

C 4 1

1 0 5

R 4 8

1 0 0 K

O T O1 6 D

R 1 2

4 . 7 K*

R

8

0

*

R

1

7

N

C

A R E F

4 4 D

D

S

G

* Q 2

N C* R 2 9

N C

D A R E C

1 2 B

L 1

0

L 4

0

G N D

C 1

1 0 V

1 0 0C

4

1

0

3

B

R 1

3 3 K

5

7

1

8

G N DV +

# 1

N J M 3 8 6 M

- I N

+ I N

O U T

B P

G A I N

G A I N

2

3

G

N

D

S P O N1 3 C

R

2

1

2

K

R

5

3

0

0

3

1

2

Q 1

V O L 31 6 E

K R C 1 0 7 S

R

4

3

.

3

K

V O L 1

1 6 C

R 6

1 K

C 9

1 0 5

+ 9 V

6 4

C 3

N CG

N

D

M O D E M T B U S

X C H 0

X C H 1

Y C O M

Y C H 0

Y C H 1

Z C O M

Z C H 0

- P D

R X I N A1 5

A P D M D T

D P D M C K

D P D M D T

A P D M C K

# 6

T C 3 5 1 3 3 F

C 3

C 4

C 5

M U T E

R X I N B

V B I A S

T X O U T

V D D

V S S 1

V S S 2

Z C H 1

1 6

2

3

1

4

1 4

8

+ 5

C

1

5

1

0

4

G N D

1 5 AR S T L

C 2 3

2 2 1

C 1 8

1 0 4

R 2 6

1 0 0 K

C 2

1 6 V

1 0

C 2 5

1 0 4

C 2 8

1 0 3 B

R 2 1

1 K

Z D 1

H Z S 5 C

R 3

4 . 7 K

G N D

R 7

1 . 5 K

G N D

+ 2 6 V

C 7

5 0 V

1 0 4 C 6

3 5 V

1 0

C 8

N C

1

2

3

R 1 3

2 7 K

C 1 6

1 0 4

A R E F4 4 D

1 1

1 0

9

6

G

N

D

7

V E E

1 2

1 3

1 5

2

1

4

5

3

R N G L

S L

C T S L 1

S P M N

4 1 C

4 1 D

4 2 D

5 2 B

4 2 C

G N D

4 5 B

X C O M1 4

A

B

# 3

7 4 H C 4 0 5 3 F

C

I N H

X C H 0

X C H 1

Y C O M

Y C H 0

Y C H 1

Z C O M

Z C H 0

Z C H 1

1 1

1 0

9

6

G N D

7

V E E

1 2

1 3

1 5

2

1

4

5

3

R L

C T S L 2

C T R L

M C R L

M C S L

S P M N

M S S L

4 3 C

5 2 B

5 2 A

4 3 D

4 3 D

5 4 E1 6 C

1 6 C

1 6 D

V O L 21 7 E

4 2 B

R L 2

R L 1

1 6 C

R 1 8

1 0 0 K

R N G O

R

2

2

1

.

5

K

R 1 9

1 . 5 K

M C S L4 2 C

R 3 2

7 5 K

C 2 4

2 2 1

7

6

5# 4

B A 1 0 3 2 4 F

R 2 5

5 6 K

C 2 0

1 0 2 B

C 1 9

N C

R 1 5

4 . 7 K

G N D

4 4 B

4 6 B

A R E F

R 3 1

5 6 K

H 2 6 V

3 4 E

G N D

1 0 K

C 2 1

T A D H

T X S L

H A F H

1 3 C

1 3 C

1 3 C

M C R L4 2 C

6 8 1 B

G N D

G N D

* R 4 1

G N D

# 4

B A 1 0 3 2 4 F

G N D

V C C

1 1

4

G N D

8

1 6

+ 5

C 1 3

1 0 4 # 2

7 4 H C 4 0 5 3 F

G N D

V C C

G N D

8

1 6

+ 5

C 1 1

1 0 4 # 2

7 4 H C 4 0 5 3 F

G N D

V C C

* P 2

9 1 1 0 S 1 2 L

N C U

R L

C M L H

T E L L

1 2 3 4 5 6 7 8

21 3 4 5 6 7 8

A

B

C

D

E

F

A

B

C

D

E

F

1

3

5

29

7

:

A

B

6

4 8

1-1

B-2

B-3

B-1

5-1

4-1

3-1

3-2

5-2

5-34-2

4-33-3

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III 29

: Speaker amplifier circuit which amplifies sounds issued from the above analog signalselector4-3 and feeds them to the speaker.

a Connector for the speaker

b Speaker volume control circuit

b-1: VOL1 OFF ON ON

b-2: VOL2 OFF OFF ON

b-3: VOL3 OFF OFF ON

Speaker volume High Medium Low (ON: Closed OFF: Opened)

8/11/2019 Brother 190 Sm 04

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III 30

+ 5

# 1 0

B A 1 0 3 5 8 F

X C O M

1 5

A

B

1 1

1 0

9

# 5

T C 3 5 1 3 3 F

C

1 4 C

I N H

6

A M U T

D M K

A D M D

A M K

A A M D

C 0

C 1

C 2

-

+

-

+

# 1 0

B A 1 0 3 5 8 F

R 7 1

C 6 0

1 0 2 B

1

2

P 1 5

B 2 B P H

1 7 E

1 3 C

1 7 D

1 7 D

1 1

8

2

1

6

4

3

5

7

9

C L R S T

1 0

1 3 C

P 1 4

B 1 1 B P H

7

6

5

3

2

1R X I N A

A P D M D T

D P D M C K

D P D M D T

A P D M C K

5

6

7

9

1 0

1 1

1 2

1 3

C 3

C 4

C 5

M U T E

X C H 0

X C H 1

Y C O M

Y C H 0

Y C H 1

Z C O M

Z C H 0

Z C H 1

# 1 1

7 4 H C 4 0 5 3 F

V E E

C

0V

G

N

D

4 2 C

4 5 A

C

7

5

1

0

4

+

9

V

C T R L

* R 8 4

N CT R L

0

* R 8 9

* R 8 8

4 . 7 K

* R 8 7

1 0 0 K* R 8 0

1 0 0 K * R 8 3

1 0 0 K

* R 8 6

N C

4 2 C

4 1 D

4 4 C

C T S L 2

T E L S L

C T S L 1

1 4

1 2

1 3

1 5

2

1

4

5

3

7

G N D

C L S E L

C T S E L1 6 C

1 6 D

R

1

0

0

1

0

0

K

R

9

9

1

0

0

K

G N D

1 7 D

C L C I

C L T X S

C L C K

C L B S Y

C L R X S

C

1

1

1

1

0

1

C

1

1

2

1

0

1

C

1

1

3

1

0

1

C

1

1

4

1

0

1

C

1

1

5

1

0

1

C

1

1

6

1

0

1

G N D C 0 V

M O D E M T B U S

R X I N B

V B I A S

T X O U T

V D D

V S S 1

V S S 2

- P D

1 6

2

3

1

4

1 4

8

+ 5

C 1 2

1 0 4

R S T L1 4 AG N D

C 2 2

2 2 0 P

C 1 4

1 0 4

R 2 4

1 0 0 K

C 5

1 6 V

1 0

G N D

R 6 7

5 6 K

5 6 K

C 6 3

N C

R 7 3

7 5 K

C 5 5

2 2 0 P

R 6 4

4 . 7 K

G N D

R 5 9

2 K

M S S L

4 2 C

C 5 4

1 0 4

* R 7 5

N C

T E L S L

5 2 B

# 1 1

7 4 H C 4 0 5 3 F

C 6 6

1 0 4

1

2

R 7 0

4 . 7 K

G N D

C 5 9

1 8 2 B

R 7 2

2 2 0 K

R 7 9

2 2 0 K

C 6 9

1 8 2 B

R 7 7

1 0 K

R 8 1

1 0 K

C 6 5

1 0 4

C 7 3

1 0 4

R 9 0

1 . 5 K

R 9 1

1 . 5 K

G N D

+ 5

* R 1 3 8

8

G N D

V C C

G N D

1 6

# 1 0

B A 1 0 3 5 8 F

C 5 8

1 0 4

+ 5

4

G N D

V C C

G N D

8

0

1 2 3 4 5 6 7 8

21 3 4 5 6 7 8

A

B

C

D

E

F

A

B

C

D

E

F

Not mounted.

1 2 3

4


1 Microphone connector

2 Amplifier and shaper circuit for signals inputted from the microphone.


4 Amplifier circuit for signals outputted from the MODEM.

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III 31

12

34

6

7

8

9

:

5

NCU PCB Circuit Diagram (U.S.A. versions)

1 Surge absorber2 Line relay (CML relay)

3 Line transformer

4 Circuit related to the line transformer

5 High-impedance transformer circuit

6 Calling signal detector

7 Loop current detector

8 Dial pulse generator

9 Telephone circuit

: Reference voltage generation circuit for the operational amplifier in 4

3.3 NCU PCB

The NCU PCB switches the communications line to telephone or built-in MODEM, under thecontrol of the main PCB.

FAX-170/190/510/HOME FAX

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5

R E F

4

S 0 V

R A 3 5 1 X 2

+ 2 6 V

P 1

6 0 3 3 B - 1 2 Z

S 0 V

+ 5 V

8

4

S 0 V

6 3 1

4 21

R E F

4

3

4

3

S 0 V

+ 2 6 V

C M L

C R 1

M Z F - 2 4 H G

o r

O U A Z - S S - 1 2 4 D

F G

2

5

+ 5 V

S 0 V

S R E F

4 2

5 3

4

3

1

2

P L S

S 0 V

+

-

2

1 4

3S 0 V

R L 2

2 1

43

T E L O F F

R E F

4

5

C I

S 0 V

S 0 V

N C U S L

S 0 V

+ 2 6 V

C M L

R L 2

C I

T E L O F F

P L S

T E L R L

R L 1

T E L S L

V 1

4 - 4 P M J

T E L S L

4

3

2

S R E F

S 0 V

S 0 V

+ 5 V

C

E BT E L R L

1

+ 2 6 V

S 0 V

F GF G

+ 5 V

+ 5 V

R E F

R 2 4

J W

J W9

J W 1 6

o r

B A 1 0 3 5 8

S B T 0 2 6 0 X 4

o r

F L 5 R 2 0 0 P N X 4

E C 1 0

S B T 0 2 6 0

o r

F L 5 R 2 0 0 P N

3

S B T 0 2 6 0 X 2

o r

F L 5 R 2 0 0 P N X 2

A

B

1 2 3

C

D

1 2 3 5 6

A

B

C

D

6

4

4 5

A

A

A

1A

A

A

A

3

8

2

6

5

4

:

7

9

NCU PCB Circuit Diagram (U.S.A. versions)

1 Surge absorber

2 Line relay (CML relay)

3 Line transformer4 Circuit related to the line transformer




8 Dial pulse generator

9 Telephone circuit

: Reference voltage generation circuit for the operational amplifiers in 4and9.

a Noise filters

7. MC: METALLIZED POLYESTER FILM CAPACITOR

6. PC: POLYESTER FILM CAPACITOR

5. CC: CERAMIC CAPACITOR

4. EC: ALUMINUM ELECTROLYTIC CAPACITOR

3. COMPONENTS IN PARENTHESES NOT TO BE MOUNTED.

2. UNLESS OTHERWISE SPECIFIED, THE VOLTAGE RESISTANCE OF CAPACITORS IS 25V OR 50V.

1. UNLESS OTHERWISE SPECIFIED, POWER CONSUMPTION OF RESISTORS IS 1/4W.

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NCU PCB Circuit Diagram (European versions)

1 Surge absorber

2 Noise filters3 Line relay (CML relay)

4 Line transformer

5 Circuit related to the line transformer




9 Dial pulse generator & DC current loop circuit

: Telephone circuit (Not included in the circuit diagram for power failure phone)

aReference voltage generation circuit for the operational amplifier in

5.

b Pulse shaper

c Line current detection input circuit

1

2

2

2

2

2

3 4

5

6

7

8

9

:

a

c

b

2

2

3

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3.4 Control Panel PCB

The control panel PCB and the main PCB communicate with each other by serially transmit-ting commands and data.

The control panel unit consists of a gate array and LCD, which are controlled by the gatearray according to commands issued from the FAX engine on the main PCB.

The calendar clock is backed up by the backup circuit on the main PCB.

The panel FPC is a flexible keyboard PCB which integrates the key matrix having rubberkeytops.

Control Panel PCB and its Related Circuit

FAXEngine

BackupCircuit

+5V

ResetCircuit

+5VPOWER

I/O Ports

SerialCommunicationsPorts

RESET

Panel FPC(Key Matrix)

LCD

Main PCB Control Panel PCB

SDIN

SDOUT

PCLK

Gate Array

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3.5 Power Supply PCB

The power supply uses the switching regulation system to generate DC power (+26.6V and+8V) from a commercial AC power supply.

The +26.6V source is stabilized and fed to the motor and solenoid for feeding documentsand recording paper or activating the automatic cutter, and also fed to the CIS LED array. Itis also fed to the main PCB where the H26.6V source is generated. The H26.6V source out-puts 26.6V only when the H26.6V ON/OFF control signal is High, for driving the recordinghead.

The +8V source is not stabilized and fed to the speaker. It is also fed to the main PCB wherethe 3-terminal regulator eliminates unstabilized components of the +8V source to generatestabilized +5V source. The +5V source is fed to the logic, control panel, and sensors.

Power Supply Circuit

FuseLightningSurgeAbsorptionCircuit

LinkFilter

RectifierCircuit

CommercialAC Power Line

Output Feedback

26.6 VOutputCircuit

8 VOutputCircuit

8 V

26.6 V

H26.6VH26.6VOutputCircuit

H26.6V ON/OFFControl Signal

Main PCB

OscillatorCircuit

Documents

Brother 190 Sm 04