Toshiba TW40F80 Guide d'installation

TECHNICAL TRAINING MANUAL

N5SS CHASSIS

NTDPJTV05

TW40F80

PROJECTION TELEVISION

Only the different points from the training manual “N5SS chassis” with its file

No. 026-9506 are described on this manual.

For other parts common with “N5SS chassis”, please refer to the original manual

with its file No. 026-9506.

NATIONAL SERVICE DIVISION

TRAINING DEPARTMENT

1420-B TOSHIBA DRIVE

LEBANON, TENNESSEE 37087

PHONE: (615)449-2360

FAX: (615)444-7520

www.toshiba.com/tacp

Contents

SECTION I: OUTLINE................................................................................................6

1. FEATURE....................................................................................................................6

2. MERITS OF BUS SYSTEM......................................................................................6

3. SPECIFICATIONS..................................................................................................... 7

4. FRONT VIEW ...........................................................................................................8

5. REAR VIEW ............................................................................................................... 9

6. REMOTE CONTROL VIEW..................................................................................10

7. CHASSIS LAYOUT..................................................................................................11

8. CONSTRUCTION OF CHASSIS...........................................................................12

SECTION II: TUNER, IF/MTS/S. PRO MODULE ................................................13

1. CIRCUIT BLOCK ................................................................................................... 13

2. POP TUNER ............................................................................................................. 17

SECTION III: CHANNEL SELECTION CIRCUIT ............................................... 18

1. OUTLINE OF CHANNEL SELECTION CIRCUIT SYSTEM ..........................18

2. OPERATION OF CHANNEL SELECTION CIRCUIT ......................................18

3. MICROCOMPUTER............................................................................................... 19

4. MICROCOMPUTER TERMINAL FUNCTION..................................................20

5. EEPROM (QA02) .....................................................................................................22

6. ON SCREEN FUNCTION....................................................................................... 22

7. SYSTEM BLOCK DIAGRAM................................................................................ 23

8. LOCAL KEY DETECTION METHOD ................................................................ 24

9. REMOTE CONTROL CODE ASSIGNMENT ..................................................... 25

10. ENTERING TO SERVICE MODE ...................................................................... 28

11. TEST SIGNAL SELECTION ...............................................................................28

12. SERVICE ADJUSTMENT .................................................................................... 28

13. FAILURE DIAGNOSIS PROCEDURE ............................................................... 29

14. TROUBLESHOOTING CHART .......................................................................... 32

SECTION IV: DVD SWITCH CIRCUIT ................................................................. 35

1. DVD SWITCH BLOCK DIAGRAM ...................................................................... 35

2. OUTLINE..................................................................................................................36

Contents Page 1

SECTION V: WAC CIRCUIT .................................................................................... 37

1. OUTLINE..................................................................................................................37

2. CIRCUIT OPERATION ..........................................................................................37

3. BLOCK DIAGRAM ................................................................................................. 42

4. WIDE ASPECT CONVERSION CIRCUIT FAILURE ANALYSIS

PROCEDURES......................................................................................................... 43

SECTION VI: DUAL CIRCUIT ................................................................................ 45

1. OUTLINE..................................................................................................................45

2. PRINCIPLES OF OPERATION............................................................................. 45

3. SYSTEM COMPONENT DIAGRAM OF DUAL UNIT......................................46

4. CIRCUIT OPERATION ..........................................................................................47

5. TERMINAL FUNCTION, DESCRIPTION AND BLOCK DIAGRAM OF

MAIN IC.................................................................................................................... 51

SECTION VII: 3-DIMENSION Y/C SEPARATOR CIRCUIT .............................. 58

1. OUTLINE..................................................................................................................58

2. CIRCUIT DESCRIPTION ...................................................................................... 58

SECTION VIII: VERTICAL OUTPUT CIRCUIT.................................................. 60

1. OUTLINE..................................................................................................................60

2. V OUTPUT CIRCUIT.............................................................................................. 61

3. PROTECTION CIRCUIT FOR V DEFLECTION STOP ...................................64

4. RASTER POSITION SWITCHING CIRCUIT .................................................... 66

SECTION IX: HORIZONTAL DEFLECTION CIRCUIT .................................... 67

1. OUTLINE..................................................................................................................67

2. HORIZONTAL DRIVE CIRCUIT.........................................................................67

3. BASIC OPERATION OF HORIZONTAL DRIVE............................................... 67

4. HORIZONTAL OUTPUT CIRCUIT ..................................................................... 69

5. HIGH VOLTAGE GENERATION CIRCUIT .......................................................76

6. HIGH VOLTAGE CIRCUIT ................................................................................... 78

7. X-RAY PROTECTION CIRCUIT.......................................................................... 80

8. OVER CURRENT PROTECTION CIRCUIT ...................................................... 81

Contents Page 2

SECTION X: DEFLECTION DISTORTION CORRECTION CIRCUIT

(SIDE DPC CIRCUIT)............................................................................................... 82

1. DEFLECTION DISTORTION CORRECTION IC (TA8859CP) ....................... 82

2. DIODE MODULATOR CIRCUIT ......................................................................... 83

3. ACTUAL CIRCUIT..................................................................................................84

SECTION XI: DIGITAL CONVERGENCE CIRCUIT ......................................... 87

1. OUTLINE..................................................................................................................87

2. CIRCUIT DESCRIPTION ...................................................................................... 87

3. PICTURE ADJUSTMENT......................................................................................89

4. CASE STUDY ........................................................................................................... 97

5. TROUBLESHOOTING ...........................................................................................98

6. CONVERGENCE OUTPUT CIRCUIT................................................................. 99

7. CONVERGENCE TROUBLESHOOTING CHART ......................................... 101

Contents Page 3

OVERALL BLOCK DIAGRAM................................................................................102

2. MERITS OF BUS SYSTEM

2-1. Improved Serviceability

Most of the adjustments previously made by resetting vari-

able resistors and/or capacitors can be made on the new chas-

sis by operating the remote control and seeing the results on

the TV screen. This allows seeing adjustments to be made

without removing servicing speed and efficiency.

2-2. Reduction of Parts Count

The use of digital-to-analog converters built into the ICs,

allowing them to be controlled by software, has eliminated

or reduced the requirement for many discrete parts such as

potentiometers and trimmers, etc.

2-3. Quality Control

This central control of the adjustment data makes it easier to

understand, analyze, and review the data, thus improving

quality of the product.

***

1. FEATURE

The TW40F80 is a first PJ-TV with a wide screen aspect

ratio of 16:9 we introduce to North U.S.A. markets.

As the basic chassis N5SS chassis is used.

The future of the model TW40F80 is the use of the N5SS

chassis. This chassis introduces a new bus system, devel-

oped by the PHILIPS company, called the I2C (or IIC) bus.

IIC stands for Inter-Integrated Circuit control. This bus co-

ordinates the transfer of data and control between ICs inside

the TV. It is a bi-directional serial bus consisting of two lines,

named SDA (Serial DATA), and SCL (Serial CLOCK). This

bus control system is made possible through the use of digi-

tal-to analog converters built into the ICs, allowing them to

be addressed and controlled by strings of digital instructions.

The TW40F80 is a first wide TV with a double window sys-

tem we introduce to North U.S.A. markets.

The size of the main and sub screens separated in left and

right on the screen is the same as each other. So it is possible

to enjoy two programs or video and TV program at the same

time.

The sub screen is equipped wit 9 screen search function and

this is very convenient convenient to search a program you

desire.

Note:

Only the different points from the manual

“N5SS Chassis” with its file No. 026-9506

aredescribedonthismanual. Forother parts

common with “N5SS Chassis”, please refer

to the original manual with its File No. 026-

9506.

SECTION I: OUTLINE

C-Chassis

Model TW56F80TW40F80 TP61F90 TP61F80 TP55F80 TP55F81 TP50F90 TP50F60 TP50F61 TP50F50 TP50F51

CRT 7" 7" 7" 7" 7" 7" 7" 7" 7" 7" 7"

CRT Source Hitach Hitach Hitach Hitach Hitach Hitach Hitach Hitach Hitach Hitach Hitach

Remote H/U Intell Univ Intell Univ Univ Univ Intell Univ Univ. A-Univ A-Univ

RMT Keys 52 key 36 key 52 key 36 key 36 key 36 key 52 key 36 key 36 key 42 key 42 key

PIP 2-TN 2-TN 2-TN 2-TN 2-TN 2-TN 2-TN 2-TN 2-TN 1-TN 1-TN

Dolby Surr ProLgc ProLgc Dy-Sur Dy-Sur Dy-Sur ProLgc

Surround Dsp4Ch ●Dsp4Ch Dsp4Ch Dsp4Ch Dsp4Ch Dsp4Ch ●●●●

SAP ●●●●●●●●●●●

Cyclone

SBS ●●●●●●●●●●●

Audio (W) 28W 28W 28W 28W 28W 28W 28W 28W 28W 28W 28W

Center +20W 20W 20W

Rear +20W 20W 20W 20W 20W 20W

Comb-Filter 3D-Y/C 3D-Y/C 3D-Y/C 3D-Y/C DIG DIG DIG DIG DIG DIG DIG

DQF ●●●●

Scan-Modul ●●●●●●●●●●●

VCC ●●

Black-Expan ●●●●●●●●●●●

Color-D.E ●●●●●●●●●●●

Pic-Prefer ●●●●●●●●●●●

Color-Temp ●●●●●●●●●●●

Flesh-Tone ●●●●●●●●●●●

Nois-Reduce ●●●●●●●●●●●

Hori-Resolu 800 800 800 800 800 800 800 800 800 800 800

Fav-Channel ●●●●●●●●●●●

Ch-Label ●●●●●●●●●●●

3-Language ●●●●●●●●●●●

Clock ●●●●●●●●●●●

Ch-Lock/Off ●●●●●●●●●●●

C.Caption ●●●●●●●●●●●

EDS ● ●●● ●●●●

New-OSD ●●●●●●●●●

S/Sight ●● ●

S-Video In 1+1 1+1 1+1 1+1 1+1 1+1 1+1 1+1 1+1 1 1

AV-In/Out 1+2/1 1+2/1 1+2/1 1+2/1 1+2/1 1+2/1 1+2/1 1+2/1 1+2/1 2/1 2/1

Front-Term ●●●●●●●●●

A(Var)-Out ●●●●●●●●●●●

2RF-Term ●●●●●●●●●

SPK-Term ●●●●●●●●●●●

PIP Audio ●●

C-Ch-Input ●●●

E/Jack

S/S-Jack ●● ●

IR-B & 75W●● ●

Adapter ●●●●●●●●●●●

Rod-Antenna

SPK-Box ●●● ●

EZ RMT ●● ●

Cabinet TW56D90 40W30E TP61E90 TP61E80 TP55E80 TP55E81 New New New New New

3. SPECIFICATIONS

GENERALSOUNDPICTURE

OTHERS

TERMINALACCE

4. FRONT VIEW

Fig. 1-1

Note: [No] Owner's manual page.

POWER

DEMO

ANT/

VIDEO

ENTER

VOLUME CHANNEL

POWER indicator

POWER button

Press to open

the door.

Behind the door

ANT / VIDEO button **

ENTER button

S-VIDEO VIDEO

L/MCNO R

AUDIO

IN-VIDEO 3

VIDEO 3 INPUTS DEMO button

MENU button CHANNEL / buttons

/ buttons

VOLUME / buttons

/ buttons

5. REAR VIEW

S-VIDEO VIDEO

L/MCNO R

AUDIO

IN-VIDEO 3

VIDEO / AUDIO INPUT jacks (VIDEO 3)

S-VIDEO INPUT jack (VIDEO 3)

Behind the door

TV front

Fig. 1-2

EXT SPEAKER

EXT INT

ANT (75 ½)

AMP

VIDEO/AUDIO

VIDEO1

VIDEO

AUDIO

S-VIDEO

AUDIO

VIDEO

AMP

VIDEO

VIDEO2 DVD

RVAR

ACC

AMP

NCUT

MAIN SPEAKER

(+)

(Ð)

(+)

(Ð)

EXTERNAL

SPEAKER

terminal MAIN

SPEAKER

switch

VIDEO / AUDIO

INPUT jacks

(VIDEO 1)

VIDEO / AUDIO

INPUT jacks

(VIDEO 2) DVD INPUT

jacks

VIDEO /

AUDIO

OUTPU

jacks

S-VIDEO INPUT jack

(VIDEO 1)

VARIABLE AUDIO

OUTPUT jacks

TV rear

Fig. 1-3

6. REMOTE CONTROL VIEW

ADV/

POP CH

ADV/

POP CH

ENT

PIC -SIZE

TV/VIDEO

RECALL

POWER

VOL

CH RTN

EDS MENU

FAV FAV

EXITRESET

STOP SCURCE PLAY POP

REC TV/VCR REW FF

CH SEARCH

STILL SWAP

MUTE

ENTER

TOSHIBA

RECALL* [ 26 ]

POWER [ 20 ]

MUTE* [ 26 ]

CHANNEL / [ 25 ]

CH RTN* [ 26 ]

VOLUME / [ 25 ]

MENU [ 18 ]

POP CH * [ 40 ]

///[18]

RESET * [ 33 ]

POP functions* [40]

(For " TV " and " CABLE " positions)

POP CH * [ 40 ]

FAN * [ 46 ]

ENTER [ 19 ]

EDS* [ 27 ]

Channel Number* [ 25 ]

TV / VIDEO* [ 55 ]

TV / CABLE / VCR switch [ 15 ]

Set to " TV " to control the TV.

TIMER* [ 38, 39 ]

EXIT * [ ON ]

Owner's Manual page

* These function do not have

duplicate locations on the TV.

They can be controlled only by

the Remote Control.

FAN * [ 46 ]

Aim at the remote sensor on the TV

100

CABLE

VCR

Fig. 1-4

Note: [No] Owner's Manual page.

7. CHASSIS LAYOUT

-3 :

CRT-D(B)

-2 :

CRT-D(G)

-1 :

CRT-D(R)

- 6 : SVM

5FOCUS PACK

- 4 : FRONT-LED

- 5 : FRONT-CON

: POWER 1

F.B.T

J-BOX

To CRT

To FOCUS

PACK

330

294

: MAIN

1pc

330

294

: DEFELECTION

1pc

330

294

: CONV / POWER2

1pc

249

165

: AV.EXT SPK

1pcs

249

165

: POWER 1

1pc

330

249

CRT-1pcs

D/FRONT/SHV

-1: A.V

-2: SPEAKER

-1: CRTÐD ( R )

-2: CRTÐD ( G )

-3: CRTÐD ( B )

-4: FRONT LED

-5: FRONT CON

-6: SVH

-1: NEW OSD

-2: FRONT SURROUND

249

165

: NEW OSD/

FRONT SURROUND

2pcs

249

165

: SW DVD

4pcs

249

: POWER S.S

2pcs

242

160

: DIGITAL

CONVER

2pcs

CHIP DOUBLE FACED

TW56F80 ONLY

242

139

:DUAL

2pcs

CHIP DOUBLE FACED

242

155

:3D Y/C

2pcs

CHIP DOUBLE FACED

189

139

:MAC

13 4pcs

CHIP DOUBLE

FACED

330

139

:AUDIO LIVE

6pcs

CHIP SINGLE FACED

242

126

:SIARSIGHT

1pcs

CHIP DOUBLE FACED

242

113

:DOLBY PRO

2pcs

CHIP DOUBLE FACED

MODE1

TW40F80

TW56F80

TUNER DOLBY DSP F.SUR COHB FDS N.OSD STARSIGHT

2PRO 4CH

3DYC

POWER STARSIGHT

(TW56F80 ONLY)

: DIGITAL

CONVER

: CONVERTER/POWER 2

REAR ANP

(TW56F80 ONLY)

CENTER AMP

(TW56F80 ONLY)

: SW DVD

- 3 : DPC

- 2 : SPEAKER

4- 1 : A/V

DOLBY

PRO

-2:

FRO.

SURR

YCS

12 - 6

: DUAL

: AUTOLIVE

:WAC

: MAIN

: DEFLECTION

: STARSIGHT

- 1: NEW OSD

TW56F80 ONLY

(chip)

PC BOARD

Fig. 1-5

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