Emerson SC319C Guida rapida

CONTROL

HEAD

CL402

AC HEAD ASSEMBLY

MAIN CBA

KEY 1

RF-SW

ST-SENS.

T-REEL

KEY 0

DV-SYNC

C-SYNC C-SYNC

V-ENV

REMOTE

CTL(+)

RESET

ROTA

D-REC-H D-REC-H

REC-SAFETY

A-MUTE

SCL

SDA

A-MUTE

CTL(-)

RF-SW

DV-SYNC

V-ENV

ROTA

END-SENS.

IC201

(SERVO/SYSTEM CONTROL)

RS201

REMOTE

SENSOR

CTL AMP-OUT

AL+5V

D203

S-LED

CTL

J116

(DECK ASSEMBLY)

Servo/System Control Block Diagram BLOCK DIAGRAMS

END-SENS. T-REELST-SENS.

Q202 Q206

Q201

Q205

RESET

TIMER+5V

TAPE-SPEED 28

EXT-H/INSEL 29

RENTAL 30

SPL-PLAY

TAPE-SPEED

EXT-H/INSEL

RENTAL

SPL-PLAY

REC/EE/PB REC/EE/PB

EXT-H/INSEL

SP-MUTE SP-MUTE

SW211

REC

SAFETY

TO VIDEO

BLOCK

TO AUDIO

BLOCK

KEY

SWITCH

KEY

SWITCH

SW201 SW205

1-8-1 1-8-2 T7300BLS

SCL

(MEMORY)

SDA

REC LED 22

REC LED 23

P-DOWN 84

P-ON-H P-DOWN

P-ON-H

D204 REC

AL+5V

LD-SW1

I2C-OPEN 45

AL+5V

SW212

LD-SW

TO POWER

SUPPLY BLOCK

SW206 SW210

SDA

SCL TO CHROMA

/TUNER

BLOCK

SDA

SCL

IC202

WF3

I2C-OPEN

5 5CTL(+)

6 6CTL(-)

MOTOR

CYLINDER ASSEMBLY CAPSTAN MOTOR

SENSOR CBA

(ST-SENSOR)

SENSOR CBA

(END-SENSOR)

DRUM

MOTOR

SENSOR 1C-F/R

2AL+12V

3D/L+12V

4P-ON+5V

5GND

6C-FG

C-CONT

8GND

9D-FG

10LD-CONT

D-CONT

12D-PG

CN201

C-FG

C-CONT

D-FG

D-PG

C-F/R

LD-CONT

D-CONT77

AL+12V

D/L+12V

P-ON+5V

CAPSTAN

MOTOR

LUMINANCE

SIGNAL PROCESS

MAIN CBA

Video Block Diagram

VIDEO (L) HEAD

VIDEO (R) HEAD

1-8-3 1-8-4 T7300BLV

(DECK ASSEMBLY)

V(L)

V-COM

V(R)

CL401

Q401

JK701

REAR V-IN

J188

V-OUT

V-AGC

TUNER

LINE

R P

SYNC

SEPA

FBC

Y/C

MIX

CCD 1H

DELAY

DOC YNR Y/C COMB

CHROMINANCE

SIGNAL PROCESS

IC401

VIDEO/AUDIO

SIGNAL PROCESS 35

REC VIDEO SIGNAL PB VIDEO SIGNAL MODE: SP/REC

CHARA

MIX

6dB

AMP

ENV

DET

AGC

AMP

HPF

FROM/TO

SERVO/SYSTEM

CONTROL BLOCK

TO CHROMA/

TUNER BLOCK

TO CHROMA/

TUNER BLOCK

FROM/TO

SERVO/SYSTEM

CONTROL BLOCK

CYLINDER ASSEMBLY

RF-SW

V-ENV

J190

WF1

J189

PB-C-MONI

BUFFER

D-V SYNC

C-SYNC

TAPE-SPEED SP/LP/EP

ROTA

D-V SYNC

ROTA

SPL-PLAY

REC/EE/PB

RENTAL

TRICK

REC/EE/PB

RENTAL

TU-VIDEO

EXT-V-IN

EXT-H/INSEL

VIDEO

45 47 49 44

Q402

BUFFER

WF6

WF5

WF4

Audio Block Diagram

BLOCK DIAGRAM FOR SECTION 2 (DECK MECHANISM)

MAIN CBA

PB-AUDIO SIGNAL REC-AUDIO SIGNAL

1-8-5

JK702

A-IN

IC301

IC401

Mode : SP/REC

T7300BLA1-8-6

BIAS

OSC

Q872

P-ON+5V

Q871

Q873

Q874

Q875

(AUDIO PROCESS)

IC801 (AMP)

SP 1

SP-GND 2

JK801

EARPHONE JACK

SP801

SPEAKER

CN802

SP-MUTE

FROM PIN 12

OF IC201

TU-AUDIO

FROM/TO

CHROMA/TUNER

BLOCK

J187

A-OUT

AUDIO

HEAD

AC HEAD ASSEMBLY

A-COM

A-PB/REC

CL402

AUDIO

ERASE

HEAD

AE-H

AE-H/FE-H

FE-H

FE-H GND

FULL

ERASE

HEAD

CL403

FE HEAD UNIT

LIMITER

SERIAL

I/F

FM DET AF

AMP

SDA

SCL

CN287

3A-COM

A-PB/REC

AE-H

AE-H/FE-H

FROM/TO

SERVO/SYSTEM

CONTROL BLOCK LINE/PB

TUNER

ATT

Q302

BUFFER



REC

AMP

7 98

AUTO

BIAS

LINE

AMP MUTE 96

ALC

TUNER

LINE

D-REC-H

A-MUTE

EXT-H/INSEL TO SERVO/

SYSTEM

CONTROL

BLOCK

WF8

OUTPUT

AMP

WF9

WF7

AMP

100

SP/LP-ON

MUTE

T7300BLC1-8-7 1-8-8

X301

3.58MHz

CL504

4.5MHz

TRAP

CF302

4.5MHz

BPF

CF301

SAW

FILTER

SF001

IC301 VIDEO/AUDIO/CHROMA/DEFLECTION/IF

TU001

AGC

J191

RF AGC-OUT

SDA

SCL

FSC

IC201

(SYSTEM CONTROL/OSD)

V-SYNC

H-SYNC

OSD-R

OSD-G

OSD-B

OSD-BLK

TU AUDIO TO AUDIO BLOCK

TU VIDEO TO VIDEO BLOCK

EXT V-IN

FROM

VIDEO BLOCK

VIDEO

CRT/H.V. BLOCK

CL504A

FROM/TO

CRT/H.V. BLOCK

BLUE4

GREEN3

RED

AFC

H-DRIVE

ACL

V-RAMP-NF

V-DRIVE

Chroma/Tuner Block Diagram

SDA

SCL

TO SERVO/SYSTEM

CONTROL BLOCK

Q301

BUFFER

REC VIDEO SIGNAL PB VIDEO SIGNAL Mode : SP/REC

REC-AUDIO SIGNAL

WF18

WF17

WF10

WF11

J233

B-OUT

CN303(NO CONNECTION)

CN303 is used for

adjustment at factory

INT.MONITOR

SDA 4

SCL 5

I2C-OPEN

CV-IN

MAIN CBA

WF2

CHROMA

TRAP

SERIAL

I/F

INTELLIGENT

MONITORING

CHROMA

BPF

IF SIGNAL

CONTROL

CIRCUIT

SYNC

SEPARATION

LUMA

SIGNAL

PROCESS

CIRCUIT

CHROMA

SIGNAL

PROCESS

CIRCUIT

H-SYNC

PROCESS

CIRCUIT

V-SYNC

PROCESS

CIRCUIT

OSD MIX/RBG MATRIX/

BLANKING

TUNER

LINE

TUNER

LINE

CLOCK

CONTROL

CIRCUIT

PUMP

AMP

THERMAL

PROTECTION

V-DRIVE

H-DRIVE

GREEN AMP

BLUE AMP

Q501 Q502

Q503

H.DRIVE

Q572

Q571 T572

T7300BLCRT

AFC

ACL

CRT/H.V. Block Diagram

V-

DRIVE

H-

DRIVE

L551

DEFLECTION-YOKE

IC551 (V-DEFLECTION CONTROL)

T571 F.B.T.

ANODE

FOCUS

SCREEN

MAIN CBA

CRT CBA

HEATER

ANODE

GND

V501

CRT

GND

FOCUS

SCREEN

JK501

HEATER 33

CN501

CL501ACL501

REC VIDEO SIGNAL PB VIDEO SIGNAL

CN571

P-ON+180V 11

FROM/TO

CHROMA/TUNER BLOCK

FOCUS VR

SCREEN VR

FROM

CHROMA/TUNER

BLOCK CL504



1-8-101-8-9

FROM

POWER SUPPLY BLOCK

2RED

GREEN

BLUE

DEF+B

H.OUTPUT

V-RAMP-NF

WF12

WF15WF14

WF16

WF13

RED AMP



Mode : SP/REC

CL504A

VCC

Power Supply Block Diagram

LINE

FILTER

BRIDGE

RECTIFIER

T601

IC601

ERROR

VOLTAGE DET

W601

F601

4A/125V L601 D603 - D606

T7300BLP

SWITCHING

Q604 VR601

DEGAUSSING

COIL

CN601

Q601

+B ADJ.

FEED

BACK

LIMITER

Q602

PS601

4 1

3 2

HOT COLD

1-8-12

1-8-11

Q606

Q605

Q607

DG601

AL+33V

P-ON+5V

MAIN CBA

NOTE :

The voltage for parts in hot circuit is measured using

hot GND as a common terminal.

CAUTION !

Fixed voltage power supply circuit is used in this unit.

If Main Fuse (F601) is blown, check to see that all components in the power supply

circuit are not defective before you connect the AC plug to the AC power supply.

Otherwise it may cause some components in the power supply circuit to fail.

4A/125V

TIMER+5V

P-DOWN

(TO PIN84 OF IC201)

P-ON-ON

P-ON+5V

P-ON+8V

AL+12V

AL+5V

P-SAFETY2

(TO PIN3 OF IC201)

P-ON-H

(FROM PIN31 OF IC201)

+5V REG.

+8V REG.

IC602

Q608

Q611

Q610

Q609

CAUTION

FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,

REPLACE ONLY WITH THE SAME TYPE FUSE.

ATTENTION : POUR UNE PROTECTION CONTINUE LES RISQES

D'INCELE N'UTILISER QUE DES FUSIBLE DE MEMO TYPE.

RISK OF FIRE-REPLACE FUSE AS MARKED.

"This symbol means fast operating fuse."

"Ce symbole reprèsente un fusible à fusion rapide."

4A/125V

Q612

+5.7V

REGULATOR

IC301

4449

DEF+B

HOT CIRCUIT. BE CAREFUL.

1-9-3 1-9-4 1-9-5 T7300SCM1

Main 1/4 Schematic Diagram

MAIN 1/4

Ref No. Position

IC201 D-3

IC202 F-4

Q205 C-1

Q206 F-4

J116 D-5

CL201 G-2

CONNECTORS

TEST POINTS

ICS

TRANSISTORS

H5 I5 J5 K5 L5

PB Audio Signal

PB Video Signal

REC Audio Signal

REC Video Signal

1-9-6 1-9-7 1-9-8 T7300SCM2

Main 2/4 Schematic Diagram

MAIN 2/4

Ref No. Position

IC401 I-2

IC801 M-4

Q401 K-2

Q402 L-4

Q491 L-2

Q871 I-2

Q872 I-2

Q873 I-1

Q874 I-1

Q875 I-1

J187 H-3

J188 L-2

J189 J-4

J190 J-2

CL401 H-4

CL402 H-1

CL403 H-1

CN802 N-4

TEST POINTS

CONNECTORS

ICS

TRANSISTORS

O5 P5 Q5 R5 S5

PB Audio Signal

PB Video Signal

REC Audio Signal

REC Video Signal

1-9-9 1-9-10 1-9-11 T7300SCM3

Main 3/4 Schematic Diagram

MAIN 3/4

Ref No. Position

IC301 R-2

Q301 R-5

Q302 Q-3

J191 Q-3

J233 T-2

J234 T-2

J239 T-2

J262 T-1

J264 T-1

CN303 U-5

CONNECTORS

ICS

TRANSISTORS

TEST POINTS

V5 W5 X5 Y5 Z5 AA5

AA4

AA3

AA2

AA1

BB5

BB4

BB3

BB2

BB1

PB Video SignalREC Video Signal

1-9-12 1-9-13 1-9-14 T7300SCM4

Main 4/4 Schematic Diagram

NOTE :

THE VOLTAGE FOR PARTS IN HOT CIRCUIT IS MEASURED USING

HOT GND AS A COMMON TERMINAL.

CAUTION !

Fixed voltage power supply circuit is used in this unit.

If Main Fuse (F601) is blown, check to see that all components in the power supply

circuit are not defective before you connect the AC plug to the AC power supply.

Otherwise it may cause some components in the power supply circuit to fail.

CRT

Ref No. Position

Q501 AA-5

Q502 AA-4

Q503 AA-4

CL501A Z-5

CL504A Z-5

CN501 BB-4

CONNECTORS

TRANSISTORS

MAIN 4/4

Ref No. Position

IC551 V-5

IC601 Z-2

IC602 X-3

Q571 X-5

Q572 X-5

Q591 X-4

Q601 AA-2

Q602 AA-2

Q604 Z-2

Q605 Y-2

Q606 Y-3

Q607 X-2

Q608 W-2

Q609 X-2

Q610 X-2

Q611 W-1

Q612 W-2

J551 Y-4

J552 Y-4

CL501 Z-5

CL504 Z-5

CN571 W-5

CN601 BB-2

VR601 Z-2

ADJUSTMENT

CONNECTORS

TEST POINTS

ICS

TRANSISTORS

VOLTAGE CHART (Power off mode)

Ref. No. S D G

Q601 0.0 137.0 1.8

Ref. No. E C B

Q602 0 3.2 0.5

Q605 0 7.0 0

Q606 7.0 7.0 7.0

Q608 5.0 7.5 5.7

Q609 6.0 6.5 6.6

Q610 0.7 4.7 1.3

Q611 0 2.4 0

Q612 5.3 5.3 0.8

CAUTION

FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,

REPLACE ONLY WITH THE SAME TYPE FUSE.

ATTENTION : POUR UNE PROTECTION CONTINUE LES RISQES

D'INCELE N'UTILISER QUE DES FUSIBLE DE MEMO TYPE.

RISK OF FIRE-REPLACE FUSE AS MARKED.

"This symbol means fast operating fuse."

"Ce symbole reprèsente un fusible à fusion rapide."

4A/125V

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