Sanyo CE32WH3-F Manuel utilisateur

Service Manual CE32WH3-F

ColourTelevision

Model CE32WH3-F

Service Ref. No. CE32WH3-F-01

PRODUCT CODE: 111340310

ORIGINAL VERSION: Chassis Series: WB5

Give complete “SERVIC EREF. NO.” for parts order or

servicing. It is shown on the rating plate at the cabinet

back of the unit.

Note

This TV receiver will not work properly in foreign

countries where the television transmission

system and power source differ from the design

specification. Refer to the specifications for the

design specifications.

Contents

Safety precautions/Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5

Digital scan operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . .6-8

Power supply &protection diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . .9

Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Option setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . .11

Service adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-15

CPU port functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . .16-18

IC block diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19-27

Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28-31

Pin description of semi-conductors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . .32

Parts description and reading in schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Cabinet parts List/T VStand parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34-36

Chassis electrical parts lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . .37-60

Part No. SKSM0325 F7YLVSEPT 1999

F7YLV

1: An isolation transformer should be connected in the

power line between the receiver and the AC line

when a service is performed on the primary of the

converter transformer of the set.

2: Comply with all caution and safety-related notes

provided on the cabinet back, inside the cabinet, on

the chassis or the picture tube.

3: When replacing a chassis in the cabinet, always be

certain that all the protective devices are installed

properly, such as, control knobs, adjustment covers

or shields, barriers, isolation resistor-capacitor

networks etc. Before returning any television to the

customer, the service technician must be sure that

it is completely safe to operate without danger of

electrical shock.

-2-

SAFETY PRECAUTION

X-RADIATION PRECAUTION

The primary source of X-RADIATION in the television receiver is the picture tube. The picture tube is specially

constructed to limit X-RADIATION emissions. For continued X-RADIATION protection, the replacement tube must

be the same type as the original including suffix letter. Excessive high voltage may produce potentially hazardous

X-RADIATION. To avoid such hazards, the high voltage must be maintained within specified limit. Refer to this

service manual, high voltage adjustment for specific high voltage limit. If high voltage exceeds specified limits,

take necessary corrective action. Carefully follow the instructions for +B1 volt power supply adjustment, and high

voltage adjustment to maintain the high voltage within the specified limits.

PRODUCT SAFETY NOTICE

SPECIFICATIONS

Product safety should be considered when a component replacement is made in any area of a receiver.

Components indicated by mark in the parts list and the schematic diagram designate components in which

safety can be of special significance. It is particularly recommended that only parts designated on the parts list in

this manual be used for component replacement designated by mark . No deviations from resistance wattage or

voltage ratings may be made for replacement items designated by mark .

Power source AC 220~240V, 50Hz

Television system System B/G, D/K, I, L/L’

Colour system PAL/SECAM/NTSC4.43 on air

NTSC3.58 in AV mode

Channel coverage VHF: E2-E12, A-H, H1, H2, F2-F10, R1-R12

UHF: 21-69, F21-F69

CATV: X, Y, Z, Z+1, Z+2, S1-S41, B-Q

Aerial input impedance 75ohm

AV terminal

21-pin terminals AV1: CENELEC Standard with RGB

AV2: CENELEC Standard with S-inputs

AV3: CENELEC Standard

Front AV terminals AV3: RCA Terminal, Video and Audio(L/R) Input

Sound output Main L/R 10.0 x 2

(Continuous)(watts)

Picture tubes(inches) 32

Dimensions(WxHxD mm) 876 x 584 x 556

Weight (kg) 50kg

-3- F7YLV

This is a diagram for all models and therefore differs slightly from the actual block diagram.

ROM

47 46 45 4419

12/6

13/5

910

12/6

13/5

910

IC804 MC14066

BUS SW

14 4

IC808

PCF8574

IC807

PCF8574

MUTE ON/OFF

AV3/FRONT AV4 SW

3D SURROUND ON/OFF

3L-Y/C SEP ON/OFF

PAL/NTSC SW

AV3 SW

AV2 SW

AV1 SW

I/O

EXPANDEDER

SCART1

AV1

SCART2

AV2

SCART3

AV3

FRONT

AV4

MONITOR-

OUT SC1 V-IN

SC2 V-IN

SC2 Y-IN

SC2 C-IN

IC1201

MM1313BD

TV-OUT

R/G/B/BLK

IC1181

NJM2284

SCL/SDA

IF/VIDEO/

CHROMA/

MARTIX

39 34 18 20 21 47

CVBS-OUT

Y-OUT

C-OUT

CVBS-2-IN

BLK

Aerial

Tuner X132

SAF

Q131

IC7101

CXD2064

3L-Y/C

SEP

VYC

171 72

A/D

D/A

CONVERTER

SCAN

CONVERTER

IC7250

SAA4991

IC101

TDA9321

FIELD

MEMORY

IC7206

SAA4955

FIELD

MEMORY

911 1416

2Y-OUT

2U-OUT

2V-OUT

IC201

TDA9178

Q7341

Q7305

Q7309 MATRIX

DEFLECTION

IC202

TDA9330

24 844

38 37 36 35 3

10 11

SDA/SCL

SCL/SDA

IC801

ST9212915

CPU

RGBBLK

OSD

BGR

BLK

IC711

TDA6111

IC721

TDA6111

IC7311

TDA6111

B VIDEO-OUT

G VIDEO-OUT

R VIDEO-OUT

358

RCRT

IC501

LA7846

H-DRIVE

E-W

Q402

T401A

H-DRIVE

IC471

MB3759

Q237

Q236

Q235

V DRIVE -

V DIRVE+

15 8

PCC

CONTROL

H-OUTPUT

Q411

POWER ERROR

Q1803

Q1904

CS-SW

IC809

CXA1315

Q473

140V

FOCUS

SCREEM

T402

CHOKE TRANS

T402

FLYBACK

65V

HEATER

200V

D.Y

VERT

OUTPUT

653

VM CIRCUIT VM COIL

Q307

IC301

L302

Q301

SELECTOR

FRONTAV4/AV3 SW

IC803

FRONTAV-IN

SCL/SDA

IC806 MC14066

BUS SW

SCL/SDA

Q801

Q803

Q804

Q802

I2C BUS

2V-OUT

2H-OUT

MEMORY

SCL/SDA SCL/SDA

Q366/

Q378

297

TV-OUT

IC7207

SAA4955

H.V

IC802

M27C1001

Outline

CHASSIS BLOCK DIAGRAMS

Fig.-1

-4-

F7YLV

IC101

IF/VIDEO/

CHROMA

IC202

CTI

IC201

SHARPNESS

DIGITAL

SCAN

CONVERTER

CIRCUIT

3LY/C SEP.

SELECTOR

CIRCUIT

SIF

Filtering

circuit

Buffer

20 21 26 28 29

Y, U, V 2(Y, U, V)

H-Sync

V-Sync

2HD

2VD

External RGB in

SAW Filter

IF Stage

Video-in

C-in

Y-in

Y-out

AV1

AV2

AV3

AV4

358

IC731

R-VIDEO OUT

358

IC721

G-VIDEO OUT

358

IC711

B-VIDEO OUT

RGB OSD

DISPLAY from CPU

Picture Tube

Video signal routeing

SCART1

AV1

SCART2

AV2

SCART2

AV3

FRONT

AV4

1,4

16,11

L/R SC3-IN

IC1201

MM1313

22,24

IC3501

MM1369 3D

SURROUND

PROCESSOR

3D SUPPER

SPEAKER

HEADPHONE

JACK

Q001

IC807

PCF8574

IC3451

TDA9875

Q3453

Q3452

IC002

TA8200 AUDIO

AMP

711 12

MUTE

31 60

IC101

TDA9321

SCL/SDA

NICAM&

SOUND

CONTROLLER

L/R

TV-OUT

MONITOR

OUT SC1-IN

SC2-IN

L/R IC1181

NJM2284

Q1215

Q1217

Q1223

Q1224

FROM

CPU

L/R

TV-IN

SIF

MONO

Tuner Q131

X131

SAF

Aerial

L/R

IF/VIDEO/

CHROMA

44 5

IF/VIDEO/

CHROMA

I2CBUS

SELECTOR

I/O

EXPANDER

ACTIVE 3D SURROUND PROCESSING

Audio signal routeing

Fig.-2

Fig.-3

-5- F7YLV

IC801

CPU

IC802

ROM

CVBS input

Q1652

RL1601

Power

Supply

Circuit

OSD

RGB Drive

H-Sync

V-Sync

61 60 48 49 44-47 42

RC Pre-amp.

IC804

Bus-SW. IC806

Bus-SW.

I2C Bus

SDA/SCL

I2C Bus

SDA/SCL-1

MEMORY

I2C Bus

SDA/SCL-2

SDA/SCL-3

19 20 21 22 23 24

Photo

Sensor

Power ON/OFF

DIGITAL

SCAN

CONVERTER

CS SW.

IC421

H-Drive

Q401-Q402 T401

Drive Trans

Q411

H-Output

IC501

V-Output <LA786>

56 3

V-Drive +

V-Drive -

Q421

EW-Out

15 8

IC471

Q472 Q473

Vert.

Coil

Horiz.

Coil

Deflection

Yoke

T402

FlyBack Trans.

T403

Choke

Trans.

L461/L462

C421

Pcc Control

IC202

DEFLECTION

2H-Sync

2V-Sync

Screen Width Control

Y.U.V

H-SYNC

V-SYNC

System control

Deflection circuit

Fig.-4

Fig.-5

-6-

F7YLV

IC7207

FIELD

MEMORY-1

IC7206

FIELD

MEMORY-2

IC7205

SCAN

CONVERTER

IC7201

A/D, D/A

TIMING

CONTROLLER

PLL VCO

Y/U/V

SWC

SWCK SRCK

SRCK

LLD

2Y_out

2U_out

2V_out

2HD_out

2VD_out

IC7208 IC7203 IC7202,IC7204

70 72

15 26 62 26

Digital scan circuit

100Hz Digital Scan Converter circuit

100Hz converter circuit consists of the following ICs.

- SAA4977H

A/D, D/A, Timing generator

- SAA4991WP

100Hz converting processor

- SAA4955TJ x2

1.9Mbit field memory

-MC74HC4046AF

PLL(Phase Locked Loop)

The Y/U/V signals decoded in the HOP IC (IC101) are sent to the scan converter circuit. The

Y/U/V signals are sent to SAA4977H through the AC coupling capacitors and converted to 8bit

digital data with 16MHz sampling clock at the A/D converting stage in the IC respectively.

SAA4977H has built-in L.P.F. and the input stage for A/D conversion, so no external L.P.F. are

required. The digitalised U/V signals are compressed with 1 by 4 at SAA4977H and sent to the

field memory IC, SAA4955T as the 8bit Y-signal and 4bit C-signal data stream. Two fields picture

information are always maintained by two field memory IC, SAA4955TJ.

SAA4991WP creates a 100Hz converted field picture information to display next field from these 2

field picture information, and sends this to SAA4977H. There are two ways to create a new field

picture information, the one is creating the compensation data by detecting the motion image in

DIGITAL SCAN OPERATION

Fig.-7

-7- F7YLV

the fields and other one is simply reading out field data twice with double scanning frequency. In

the SAA4977H, the converted 8bit Y-signal is added sharpness processing and the converted 8bit

U/V-signals are added the CTI processing. The processed signals which become 10 bit digital

signals are demodulated to analogue Y/U/V signals by the10 bit D/A converter with 32MHz clock

rate (the double of input A/D sampling).

The Y/U/V signals up-converted to 100Hz are eliminated the clock components at external 12MHz

LPF, and output from the scan converter circuit after adjusting the gain amplitude for sharpness

IC, TDA9178, at the next stage. Also 100Hz H-sync and V-sync signals are supplied to the

deflection circuit.

The clock used for system control is line lock clock. The H/V signals which is synchronised with

Y/U/V signals are sent to the scan converter for timing control. The PLL/VCO circuits generate a

system clock 32MHz by referring to its 15.7kHz H-signal. The PLL, MC74HC4046AF, phase

compares the H-signal getting waveform-shaped at TC7S32F and the signal getting divided

32MHz clock by 1024 and controls VCO circuit at the next stage to synchronise the phase. After

waveform-shaping at TC7SU04F and TC7SH00F, its clock signal are supplied to each ICs as the

32MHz system clock.

The making of display information with 100Hz scan conversion is performed by the following

format.

1) Digital scan

odd field even field odd field even field odd field

Signal A B C D E

100Hz scan field * o e o e o e o e o e

Display field A+b a+B B+c b+C C+d c+D D+e d+E E+f e+F

* e = even, o = odd field

The display field picture information on the digital scan is made by analysing the 2 fields previous

data stored in the field memory. The digital scan analyses the picture information on the same

peripheral area of the pixel between the fields and detects the motion vector, and creates a new

field picture information according to its motion.

The small and capital letter show which field data is emphasised when making the field data. The

capital letter shows emphasised field data.

50Hz 100Hz

AABBC

A' = A, B'= B

(a) Normal Scan (b) Normal Double Scan

100Hz

A+ba+B B+cb+C c+D

Fig.-8

-8-

F7YLV

2) 100Hz Normal scan

odd field even field odd field even field odd field

Signal A B C D E

100Hz scan field o e o e o e o e o e

Display field A A B B C C D D E E

* e = even, o = odd field

The display field picture information on the normal scan is made simply by reading out each field

data stored in the field memory with double scanning frequency repeatedly.

SAA4977H and SAA4991WP are controlled via IIC bus. The CPU of the TV sends the control

data to SAA4977H to control the display mode. The equipped micro-computer in SAA4977H

receives external commands via IIC bus and controls SAA4991WP to change the operation

through the SNERT-bus.

The system clock is 32MHz, f=fH x 1024 x 2

NTSC : 32.223776MHz

PAL : 32.000000MHz

Y0Y1Y2Y3Y4

1024 sampling

sampling clock=16MHz=1024/1 horiz.

Y0Y1Y2Y3Y4

R-Y0

B-Y0B-Y1B-Y2B-Y3B-Y4

R-Y4

R-Y3

R-Y2

R-Y1

(R-Y

0)'

(B-Y0)'

Write

Time divided multiplex

Y0Y1Y2Y3Y4

(R-Y0)' (B-Y0)' (R-Y4)' (B-Y4)' (R-Y8)'

Y5Y6Y7Y8Y9

R-Y0

B-Y0

R-Y2

B-Y2

R-Y4R-Y5

B-Y4

R-Y7

B-Y7

R-Y9R-Y1

B-Y1B-Y3

R-Y3

B-Y6

R-Y6

B-Y8

R-Y8

B-Y5B-Y9

1024 sampling

Double

Scan

Converting

sampling clock=32MHz=2048/1 horiz.

Read out in double clock

(a) (b)

(c)

R-Y

B-Y

R-Y

B-Y

Fig.-9

-9- F7YLV

CONVERTER TRANS

IC6111

SWITCHING

54321

C605

Rectifier

D601

D613

AC SW601

MAINS SW T1651

RL160

RELAY

RC14V

5V RC5V

IC1651 IC676

12V

D1659

D1658

D1651

D1653

Q611 Q621

R647

IC631

33V

140V

14V

-18V

7.5V

27V

D636

D635

D634

D631

D633

D632

D651

Q1652

IC7351

IC7352

IC7353

IC674

D5V

A5V

D3.3V

A3.3V

5VTV

Vertical

Deflection

V.Def

200V

T402

FLYBACK TRANS

T403

CHOKE TRANS

HighVoltage

FocusVoltage

ScreenVoltage

65V

CRT

Heater

POWER ON/OFF

ON:HI

RELAY

IC808

I/O EXPANDER

414

IC809

I/O EXPANDER

Q1804

R1809

D1803 D1804

Q1803

D811

D292 D294

Q1806

R1816

HIGH VOLTAGE &

POWER FAIL

DETECTION

HIGH VOLTAGE &

POWER FAIL

DETECTION

D485

D481

D486

Video Out

Q411

Q572

D646

D649

D647

D638

D637

Q632

Q631

IC673

IC672

IC671

8VTV

9VTV

12VTV

D672

D677

POWER FAILURE

DETECTION

8V Reg

9V Reg

12V Reg

D679

D7353

D828

D7351

D7352

D7354

5V Reg

3.3V Reg

5V Reg

12V Reg

D642 D643

20,19

1514

9,10

5,6

T611 CPU

IC801

23 24

C BUS

SCL/SDA

H-OUTPUT

14V Reg

Power Supply Lines

Power Failuer Detection Lines

Power supply & Protection circuit

Fig.-5

POWER SUPPLY & PROTECTION DIAGRAMS

-10-

F7YLV

DISASSEMBLY

CABINET BACK DISASSEMBLY

1. Remove 10 screws(A) and 2 screws(B)

2. Pull out the cabinet back.

AV1

AV2

AV3

ANALOGUE

ANT.75Ω

(A)

(B)

Ce manuel convient aux modèles suivants

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