Toshiba 40WH08G, 40WH08B Schematic

FILE NO. 030-200004

SERVICE MANUAL

COLOUR TELEVISION

C00P Chassis

40WH08G,40WH08B

PRINTED IN JAPAN Jun., 1999 T

CHAPTER 1 GENERAL ADJUSTMENTS

SAFETY INSTRUCTIONS........................................................................................................................................3

CRT ASSEMBLY REPLACEMENT AND MOUNTING .............................................................................................4

PICTURE TUBE COMPONENTS ADJUSTMENT.................................................................................................... 6

SERVICE POSITION................................................................................................................................................9

SERVICE MODE ....................................................................................................................................................10

DESIGN MODE ......................................................................................................................................................13

GENERAL ADJUSTMENTS

ELECTRICAL ADJUSTMENT ................................................................................................................................14

CONVERGENCE ADJUSTMENT ..........................................................................................................................22

SCREEN AND MIRROR ALIGNMENTS ................................................................................................................31

CIRCUIT CHECKS .................................................................................................................................................32

CHAPTER 2 SPECIFIC INFORMATIONS

SETTING & ADJUSTING DATA ..............................................................................................................................33

LOCATION OF CONTROLS ...................................................................................................................................34

CIRCUIT BLOCK DIAGRAM ..................................................................................................................................36

TABLE OF CONTENTS

MECHANICAL DISASSEMBLY ..............................................................................................................................37

CHASSIS AND CABINET REPLACEMENT PARTS LIST......................................................................................38

PC BOARDS BOTTOM VIEW.................................................................................................................................65

TERMINAL VIEW OF TRANSISTORS ...................................................................................................................80

SPECIFICA TIONS .................................................................................................................................................. 81

APPENDIX:

CIRCUIT DIAGRAM

– 2 –

CHAPTER 1 GENERAL ADJUSTMENTS

SAFETY INSTRUCTIONS

WARNING: BEFORE SERVICING THIS CHASSIS, READ THE “X-RAY RADIATION PRECAUTION”, “SAFETY PRECAU-

TION” AND “PRODUCT SAFETY NOTICE” INSTRUCTIONS BELOW.

X-RAY RADIATION PRECAUTION

1. Excessive high voltage can produce potentially hazardous X-RAY RADIATION. To avoid such hazards, the high voltage must not be above the specified limit. The nominal value of the high voltage of this receiver is (A) kV at zero beam current (minimum brightness) under a (C) V AC po wer source. The high voltage must not, under any circumstances, exceed (B) kV.

Refer to table-1 for high voltage (A), (B) & AC voltage (C). (See SETTING & ADJUSTING DATA on page 33)

Each time a receiver requires servicing, the high voltage should be checked following the HIGH VOLTAGE CHECK procedure in this manual. It is recommended that the reading of the high voltage be recorded as a part of the service record. It is important to use an accurate and reliable high voltage meter.

SAFETY PRECAUTION

WARNING : Service should not be attempted by any one unfamiliar with the necessary precautions on this receiver . The following are the necessary precautions to be observed before servicing this chassis.

1. An isolation transformer should be connected in the power line between the receiver and the AC line before any service is performed on the receiver.

2. Always discharge the picture tube anode to the CRT conductive coating before handling the picture tube. The picture tube is highly evacuated and if broken, glass fragments will be violently expelled. Use shatter proof goggles and keep picture tube away from the unprotected body while handling.

3. When replacing a chassis in the cabinet, always be certain that all the protective devices are put back in place, such as; nonmetallic control knobs, insulating covers, shields, isolation resistor-capacitor network etc.

2. The only source of X-RAY RADIATION in this TV receiver is the picture tube. For continued X-RAY RADIATION protection, the replacement tube must be exactly the same type tube as specified in the parts list.

3. Some part in this receiver have special safety-related characteristics for X-RAY RADIATION protection. For continued safety, parts replacement should be undertaken only after referring to the PRODUCT SAFETY NOTICE belo w.

GENERAL ADJUSTMENTS

PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These characteristics are often passed unnoticed by a visual inspection and the protection afforded b y them cannot necessarily be obtained b y using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in this manual and its supplements; electrical components having such features are identified by the international hazard symbols on the schematic diagram and the parts list. Before replacing any of these components, read the parts list in this manual carefully. The use of substitute replacement parts which do not have the same safety characteristics as specified in the parts list may create shock, fire, X-ray radiation or other hazards.

– 3 –

CRT ASSEMBLY REPLACEMENT AND MOUNTING

CAUTION : DO NOT LOOSEN THE HEX HEAD BOLTS WITH SPRINGS (12 PCS), BECAUSE THOSE ARE FOR

SEALING OF CRT COOLANT.

GENERAL ADJUSTMENTS

Attention Serviceman

The Hex Head Bolts with Springs. (see sketch) used on CRT assembly, are “NOT”

Adjustment Screws DO NOT LOOSEN-FLUID LEAKAGE WILL OCCUR.

4 Screws

Lens Assembly

CRT Assembly

CRT Anode Cap Assembly

S.V.M. Coil

CRT DRIVE Board

4 Screws

CRT Mounting

Deflection Yoke and Conver Yoke

Lens and Neck Components View

– 4 –

TO REMOVE CRT (Same procedure for R, G, B)

1. Remove CRT DRIVE Board, S. V. M. COIL and DEF. YOKE from CRT.

2. Remove Lens Assembly.

3. Detach CRT Anode Cap from CRT.

4. Remove CRT Assembly from CRT Mounting.

CRT REPLACEMENT (Same procedure for R, G, B) Reverse the removal procedures except the followings.

1. Anode Cable should be replaced with new one. See "SERVICING PRECAUTIONS" shown below.

2. Install silicon (T461B) to the CRT, replace the Anode cable and put enough silicon again on around the Anode Cap as illustrated.

CAUTION: Align the Anode cable as illustrated on page

ADJUSTING PROCEDURE IN REPLACING CRT

1. R.G.B. CUTOFF (SCREEN VR) ADJUSTMENT (page 6.)

2. R.G.B. FOCUS ADJUSTMENT (page 6.)

3. PICTURE TILT ADJUSTMENT (page 7.)

4. USER CONVERGENCE CENTER CHECK (Refer to owner's manual.)

5. CENTERING ADJUSTMENT (page 7.)

6. CONVERGENCE ADJUSTMENT (page 22.)

7. WHITE BALANCE ADJUSTMENT (page 14.)

Adjustments are complete.

Anode Cap

GENERAL ADJUSTMENTS

Silicon (On shaded area) TSE3843W #23960136

SERVICING PRECAUTIONS

■ Do not use a magnetized screw driver for screws of Deflection Yoke and Velocity Modulation Coil to avoid magnetization of electron gun. Magnetization of electron gun will degrade basic function and result in unbalance of right and left shift of user static convergence, and result in no variable quantity.

2 ~ 5 mm

15 ~ 25 mm

■ When replacing the anode cap assembly (CRT) or anode lead assembly (F.B.T.), remove the anode lead holder from old one and attach the holder again to new anode lead.

■ Check the point of anode lead in a straight line, if it is winding, please revise it.

Screw for D.Y

Screw for SVM coil

Anode lead holder

– 5 –

WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "X-RAY RADIATION PRECAUTION", "SAFETY PRE-

CAUTION" AND "PRODUCT SAFETY NOTICE" ON PAGE 3 OF THIS MANUAL.

PICTURE TUBE COMPONENTS ADJUSTMENT

ADJUSTING PROCEDURE IN REPLACING CRT

Cutoff

Lens focus

Electrical focus

GENERAL ADJUSTMENTS

Yoke horizontal

DESCRIPTION OF NECK COMPONENTS

S.V.M. COIL

1 Deflection yoke and convergence yoke.

The position on the neck is required most front (CRT funnel side) and the screw is fastened after rotating yoke adjusting picture tilt.

2 Centering magnet

After adjusting picture tilt, picture position is finally fixed by this magnet. In order to get maximum margin of user convergence control for center of screen, this magnet have to be used for center convergence adjustment.

PREPARATION

Operate the receiver for at least 5 minutes.

R, G, B CUTOFF (SCREEN VR) ADJUSTMENT

1. Adjust before replace the screen assembly.

2. Set user control to reset position. CONTRAST → Max

(

BRIGHTNESS, COLOR, TINT → Center.

3. Call up the adjustment mode display, then select the

item RCUT.

4. Adjust the data of items RCUT, GCUT, and BCUT to

"40H".

5. Press the -/-- ("Info") button on Remote. (Y-MUTE : ON)

6. Gradually rotate R, G and B screen volume of FOCUS

PAC clockwise or counterclockwise until the raster appears slightly on the CRT through the each lens, and leave them. (Lookin to the lens in order to check the raster.)

7. Press the -/-- ("Info") button on Remote. (Return to Normal)

Picture)

User convergence center check

Centering (PAL)

Convergence adjustment (PAL/NTSC)

White balance

Sub bright adjustment

End

RGB FOCUS ADJUSTMENT

1. Call-up the adjustment mode (see page 10)

2. Press a b utton on the remote controller in order to display the internally-generated black cross-hatch (See TEST SIGNAL SELECTION on page 11.)

3. Expose only RED by cover ing the GREEN and BLUE lenses with caps.

4. Loosen the RED lens fixing screws (refer to Fig. a), and adjust the RED lens focus to obtain the sharpest point while observing the middle and peripheral sections of the screen.

Fig. a

5. Use the focus VR of “R” of the focus pac k in order to adjust the electric focus in the middle and peripheral sections of the screen to its sharpest level.

6. Check the RED focus of the whole screen and if necessary repeat steps 4 and 5.

7. Fix the RED lens by tightening its fixing screws.

8. Expose only GREEN by covering the RED and BLUE lenses with caps.

9. Display the internally-generated black cross-hatch signal.

10. Adjust the GREEN lens focus on the left border of the screen to its sharpest level, then check the focus on the right border, and if it is at its sharpest level, fix it in that

)

position by tightening the lens screws.

(1) If the horizontal line toward the right border is red-

flared, turn the lens screw slightly right in order to balance it with the left border. (After adjustment, the left border tends to be slightly green-flared, and the right border tends to be slightly red-flared.)

(2) If the horizontal line toward the right border is green-

flared, turn the lens screw slightly left in order to balance it with the left border. (After adjustment, the left border tends to be slightly red-flared, and the right border tends to be slightly green-flared.)

– 6 –

Note: The aim of the abov

for the Green lens focus is to obtain the best lens focus after 2 - 3 hours of warming up taking into account the focus drift; it applies if the war ming up time before the adjustment is less than 30 minutes. (The horizontal line in the screen middle section tends to be slightly redflared.)

e-descr

ibed adjustment procedure

Note: Keep in mind that only the BLUE electric focus is ad-

justed with the black cross-hatch.

18. Check the BLUE focus of the whole screen and if necessary repeat steps 17 and 19.

19. Fix the BLUE lens by tightening its fixing screws.

In case of warming up of more than 2 hours under a condition that the large anode current is running through the projection tube so that for example the all-white pattern appears, adjust to obtain the sharpest focus while observing the whole screen like in the RED case.

11. Use the focus VR of “G” of the focus pack in order to adjust the electric focus in the middle section of the screen to its sharpest level.

Note: Nor mally the most clearly visible point of the scanning

line is the sharpest point of the Green focus, howev er as the characteristics vary depending on the projection tube, the sharpest focus points of the vertical and horizontal lines may not match each other , thus when you turn the focus VR, if the picture tends to be tremendously unstable (rolls horizontally or vertically), adjust the balance of the vertical and horizontal lines to its best position.

12. Check the GREEN focus of the whole screen and if necessary repeat steps 10 and 11.

13. Fix the GREEN lens by tightening up its fixing screws.

14. Expose only BLUE by covering the RED and GREEN lenses with caps.

15. Display the internally-generated black cross-hatch.

16. Loosen the BLUE lens fixing screws (refer to Fig. a), and adjust the BLUE lens focus while observing the middle and peripheral screen sections.

17. Use the focus VR of “B” of the f ocus pack in order to adjust the focus in the middle section of the screen to its sharpest level. (The point of the Blue focus becomes sharpest when the brightness level of BLUE is lowest, the cross-hatch is clearly visible.)

TILT ADJUSTMENT

Rotate R, G, B deflection yoke so that picture becomes horizon, then fasten screw.

CENTERING ADJUSTMENT

1. Stretch a thread between two center of screen edge (top and bottom, left and right).

2. Select the adjustment mode. (See page 10.)

3. Press TV/VIDEO button on the Remote Control to displa y the black cross-hatch.

GENERAL ADJUSTMENTS

4. Adjust G centering magnet so that the cross-hatch pattern center comes to screen center.

5. Perform HEIGHT adjustment . (See page 14.)

6. Perform WIDTH adjustment. (See page 14.)

7. Check whole quality of green line.

8. Adjust R, B centering magnet so that the cross-hatch pattern center comes to screen center.

– 7 –

LOCATION OF SCREEN AND FOCUS VR'S

To remove the Speaker grille and Front panel.

GENERAL ADJUSTMENTS

SCREEN VR

FOCUS VR

Front panel

Speaker grille

REPLACEMENT OF HIGH VOLTAGE CABLE

ANODE LEAD

RUBBER BOOT

LEAD HOLDER

1. When replacing Anode Lead or Anode Cap with new

one, remove Lead Holder from old lead as shown in figure below , and put it on new lead. Do not throw awa y Lead Holder.

NOTE : THE LEAD HOLDER IS ATTACHED TO

TP A5007 (Z450), BUT IS NO T A TTACHED TO ANODE LEAD AND ANODE CAP. RUBBER BOOT IS ATTA CHED TO ANODE LEAD AND ANODE CAP.

Fig. a

Z450 TPA5007

– 8 –

2. Detaching Lead Holder

LOCK

LEAD HOLDER

RUBBER BOOT

Fig. b

OLD ANODE LEAD

ANODE CAP

Cut here rubber boot and lead together to detach Lead Holder.

WARNING: BEFORE SER VICING THIS CHASSIS , READ THE "X-RAY RADIA TION PRECA UTION", "SAFETY PRECAU-

TION" AND "PRODUCT SAFETY NOTICE" ON PAGE 3 OF THIS MANUAL.

SERVICE POSITION

In order to assure the performance, processed wires shall be replaced after the repair work. Work procedures are as follows:

1. Remove the back board.

2. Remove lead wires.

3. Draw out the chassis.

4. Rest the chassis against the back cabinet, chassis as shown bellow.

After repair work finished, replace it in the opposite procedure.

GENERAL ADJUSTMENTS

– 9 –

1. ENTERING TO SERVICE MODE

1) Press o button once on Remote Control.

SERVICE MODE

2) Press o button again to keep pressing.

3) While pressing the o button, press MENU button on TV set.

or Sound Mute

GENERAL ADJUSTMENTS

2. DISPLAYING THE ADJUSTMENT MENU

1) Press MENU button on TV.

Service mode

3. KEY FUNCTION IN THE SERVICE MODE

The following key entry during display of adjustment menu provides special functions. Screen adjustment mode ON/OFF: -/-- ("Info") button (on Remote)

Test signal selection : a button (on Remote) Selection of the adjustment items : Channel s/t (on TV or Remote) Change of the data value : Volume ; +/– (on TV or Remote) Adjustment menu mode ON/OFF : MENU button (on TV) Initialization of the memory (QA02) : CALL + Channel button on TV (s) Reset the count of operating protect

circuit to “00”: CALL + Channel button on TV (t) “RCUT” selection : 1 button “GCUT” selection : 2 button “BCUT” selection : 3 button “SCNT” selection : 4 button “COLC” selection : 5 button “TNTC” selection : 6 button Convergence adj : YELLOW button Self diagnostic display ON/OFF : 9 button

Item Data

(Service mode display)

Adjustment mode

Press

Item Data

Color thickness correction note: Displayed differently as shown below, de-

pending on the setting of the receiving color

system. COLP (PAL) COLC (NTSC) COLS (SECAM)

CAUTION : Never try to perform initialization unless you have changed the memory IC.

– 10 –

4. SELECTING THE ADJUSTING ITEMS

1) Every pressing of CHANNEL s button in the service mode changes the adjustment items in the order of table-2. (t button for reverse order)

Refer to table-2 for preset data of adjustment mode. (See SETTING & ADJUSTING DATA on page 33)

5. ADJUSTING THE DATA

1) Pressing of VOLUME ; +/– button will change the value of data in the range from 00H to FFH. The variable

range depends on the adjusting item.

6. EXIT FROM SERVICE MODE

1) Pressing POWER button to turn off the TV once.

■ INITIALIZATION OF MEMORY DATA OF QA02

After replacing QA02, the following initialization is required.

1. Enter the service mode, then select any register item.

2. Press and hold the CALL button on the Remote, then press the CHANNEL s button on the TV. The initialization of QA02 has been complated.

3. Check the picture carefully. If necessary, adjust any adjustment item above. Perfor m “Auto search Memory” on the owner’s manual.

CAUTION: Never attempt to initialize the data unless QA02 has been replaced.

7. TEST SIGNAL SELECTION

1) Every pressing of a button on the Remote Control changes the built-in test patterns on screen as described below in SERVICE MODE.

Signal off

NTSC signals (5 patterns)

PAL signals (5 patterns)

Signals Picture

• Red raster

• Green raster

• Blue r aster

• All White

• Black cross-hatch

GENERAL ADJUSTMENTS

The signals marked with are not usable to display in the Test signal for some model.

– 11 –

8. SELF DIAGNOSTIC FUNCTION

1) Press “9” button on Remote Control during display of adjustment menu in the service mode. The diagnosis will begin to check if interface among IC’s are executed properly.

2) During diagnosis, the following displays are shown.

2300****

TIME : 000000

POWER : 00

BUS CONT : OK

BLOCK : UV V1 V2 V3 QV01

GENERAL ADJUSTMENTS

1 Part number of microcomputer (QA01) 2 Total hour of turn the Power on. (unit: hour) 3 Operation number of protecting circuit ----“00” is nor-

mal. When indication is other than “00”, overcurrent apts to flow, and circuit parts may possibly be damaged.

4 BUS CONT ----“OK” is normal.

When indication shows “Q uuu (Green: OK, Red: NG)”, the device with the number ma y possibly be damaged.

5 BLOCK

UV : TV reception mode V1 : VIDEO 1 input mode (a1) V2 : VIDEO 2 input mode (a2) V3 : VIDEO 3 input mode (a3)

Indicated color of mode now selected : Green and Red Indicated color of other modes : White

Green :Normal Red : The microcomputer operates to provide judgement

of no video signal. The red color is still indicated though the signal is input, failure may e xist in input signal line including QV01.

QV01 : In case of indication green ---Normal

In case of indication red with input signal---Failure may exist in output line including QV01.

The items marked with are not usable to display in the SELF DIAGNOSTIC FUCTION for some model.

3) Press "9" button on Remote Control during display of selfcheck display as above, the selfcheck screen for EPG/TEXT unit as shown below is displayed. (This function is only 40WH08G (EPG model).

SELFCHECK EPG/TEXT QF01 XXX QF10 XXX QF02 XXX QF03 XXX QF04 XXX QF05 XXX

Part No. QF01

QF10

QF02 QF03 QF04

Part Name MEGATEXT

DRAM

SUB-MICOM PROGRAM

FLASH-ROM DATA FLASH-ROM

XXX ERR 00 20 00 18 20 02 04 ERR xxyy ERR 00 A4

Contents MEGATEXT plus SDA5275 access failed Unknown MEGATEXT plus SDA5275-3P C02-22 no DRAM 8 Mbit DRAM (2k-refresh type 16 Mbit DRAM) 16 Mbit DRAM (4k-refresh type 16 Mbit DRAM) C161RI Version BB step C161RI Version AA step ROM access failed Subsystem Version xx.yy FLASH-ROM access failed no FLASH-ROM AM29F040 (AMD, 4Mbit) MBM29F040C (Fujitsu, 4Mbit) MX29F040 (Macronix, 4Mbit) Unknown 4Mbit FLASH-ROM EEPROM access failed No EEPROM 8kbit EEPROM

QF05

EEPROM

FF ERR 00 12

– 12 –

1. ENTERING TO DESIGN MODE

1) Select the Service mode.

DESIGN MODE

2) While pressing CALL button on Remote and press MENU button on TV.

3) Press MENU button on TV.

S D

(Design mode) (Adjustment mode)

When QA02 is initialized, items “OPT0” and “OPT1” of DESIGN MODE are set to the data of the representative model of this chassis family. Therefore, because ON-SCREEN specification remains in the state of the representative of model. This model is required to reset the data of items “OPT0” and “OPT1”.

2. SELECTING THE ADJUSTING ITEMS

Every pressing of CHANNEL t button in the design mode changes the adjustment items in the order of table-3. (s button for reverse order)

Refer to table-3 for data of design mode. (See SETTING & ADJUSTING DATA on page 33)

3. ADJUSTING THE DATA

Pressing of VOLUME s or t button will change the value of data.

Press

ITEM DATA

GENERAL ADJUSTMENTS

– 13 –

PAL

ELECTRICAL ADJUSTMENT

ITEM ADJUSTMENT PROCEDURE

WIDTH (WID)

GENERAL ADJUSTMENTS

HEIGHT

(HIT)

1. Select picture size WIDE mode.

2. Call up the adjustment mode display, and press the TV/VIDEO button on the remote untill the white cross dot pattern appears on the screen.

3. Press the CHANNEL s or t button to select the item WID and press the VOLUME s or t button to get the pictuer so the left and right edges of rester begin to lack.

4. Press the VOLUME s or t to advance the data 13 steps.

* CAUTION

"WID" data don't adjust other picture size, only WIDE mode.

1. Call up the adjustment mode display, then select the item HIT.

2. Press the VOLUME s or t button to get the picture so the top of raster begins to lack.

3. Press the VOLUME s button to advance the data by following steps.

WIDE: 11 steps Super Live: 13 steps CINEMA: 21 steps Sub Title: 17 steps

* CAUTION

First adjust WIDE mode next other.

Note : Check the vertical picture position is correct.

ITEM ADJUSTMENT PROCEDURE

WHITE BALANCE

(RCUT) (GCUT) (BCUT) (RDRV) (BDRV)

Black and White pattern

High light area Adjust "RDRV" or "BDRV" to be white.

Low light area Fine adjust "RCUT", "GCUT" or "BCUT" to be black.

1. Set user control to reset position. CONTRAST → Max.

(

BRIGHTNESS, COLOR, TINT → Center.

2. Call up the adjustment mode display, then select the item RCUT.

3. Adjust the data of items RCUT, GCUT, and BCUT to "40H".

4. Press the "Info" button on Remote control. (Y-MUTE : ON)

5. Gradually rotate R, G and B screen volume of FOCUS PAC clockwise or

counterclockwise until the raster appears slightly on the CRT through the each lens, and leave them. (Lookin to the lens in order to check the raster.)

6. Press the "Info" button on Remote control. (Return to Normal Picture)

7. Press the a button on Remote, and select the Black and White pattern.

8. Adjust the data of items RCUT, GCUT and BCUT for proper white-balanced

picture in low light area.

9. Adjust the data of items RDR V and BDR V for proper white-balanced picture in

high light area.

10. Check the white balance in both low and high light areas. If necessary, perform again steps from 8 to 9.

)

– 14 –

(Reference factory adjustment)

Item Name Setting Input signal Measuring point Adjusting method Adjustment standard

– 15 –

[SCNT]

[BRTC]

[COLP]

[COLS]

[SRY]

[SBY]

Sub-contrast

Sub-bright center

Sub-color center PAL

Sub-color center SECAM

SECAM R-Y black level

SECAN B-Y black level

Picture mode 1 A

udio system: I

Wide mode Picture mode 1

Wide mode

Picture mode 1 Wide mode

Sub-bright signal (PAL-I signal)

Sub-bright signal

Sub-bright signal (PAL)

SECAM color bar

TP46B SIGNAL unit

Screen adjustment

TP46B SIGNAL unit

TP02 SIGNAL unit

TP01 SIGNAL unit

y Adjust the amplitude from the pedestal

level to the white peak.

y Adjust the number of collapsed black

bars of the sub-bright signal.

x Carry out adjustment after adjusting the

W/B and SCNT.

y Adjust the amplitude of the color bar. x Adjust the P-P value of the upper half.

y Adjust so that the level of the mono-

chrome signal part can meet the level of the H.BLK.

y Adjust so that the level of the mono-

chrome signal part can meet the level of the H.BLK.

2.4 ± 0.1 Vpp

4 ± 1.5 bars

1.20 ± 0.1 Vpp

1.75 ± 0.1Vop

0 ± 10 mV

GENERAL ADJUSTMENTS

Item Name Setting Input signal Measuring point Adjusting method Adjustment standard

– 16 –

Screen adjustment

Focus adjustment

RDRV BDRV

RCUT BCUT

Vert. Center voltage adjustment

Screen

Focus

Bright part W/B

Dark part W/B

Center voltage

Factory- screenadjustment mode

Dynamic mode Cinema mode

Dynamic mode Wide mode

Retoma signal (PAL-I)

Crosshatch signal

Phillips pattern (PAL-I)

CRT screen

Screen adjustment

Between TP-V and TP-G

y Make the surrounding as dark as

possible.

x Enter factory-screen-adjustment mode.

(Y mute, DRV.CUT. = 40 H)

c Directly observe the CRT screen, and

adjust the screen VR to the point where it begins to emit light.

v Use R, G, and B tubes respectively to

perform above-mentioned adjustments.

y Make adjustments to achieve the best

possible position by repeating electrical and optical focusing.

x Use jigs to protect the CRTs, except the

axis under adjustment, from any light.

c Use R, G, ad B tubes respectively to

perform above-mentioned adjustments.

y Adjust the color temperature of the

bright part (103cd/m

y Adjust the color temperature of the dark

part (17cd/m

y Connect a voltmeter and adjust the high

voltage to +30 ± 10mV.

Point where it begins to emit light.

For details, refer to the focus adjustment method

8750k–0.002uv

+30 ± 10mV

Focus adjustment method (1/2)

Model Adjustment points Adjustment methods

– 17 –

40WH08G 40WH08B

Electrical focus

Lens focus

(Precautions)

Conditions: (1) RED, BLUE: Internal Retoma signals (PAL)

(2) GREEN: Internal crosshatch signal (white crosshatch on black background) (3) User adjustment: Dynamic mode, cinema mode (4) Carry out electrical focus and lens focus after rough adjustment. (5) Use the jig to protect everything, except the color subjected to adjustment, from exposure to light.

(1)Receive the internal Retoma signals, use the focus VR of the focus pack (Z410), and adjust the electrical focus of

each R and B projection tube to the position where the center of the screen gets optimally focused.

(2)Receive the internal crosshatch signals, use the focus VR of the focus pack (Z410), and adjust the electrical focus of

G so that the vertical scanning lines on the screen center can appear most clearly.

(1)R, B: Receive the internal Retoma signals, watch the screen center and its periphery, and make adjustment to the

best possible focus.

(2)G: Adjust this by the method

y Carry out anticipated adjustment on the G lens, considering the time until the lens focus stabilizes. x The level of anticipated adjustment on the G lens results in a required level of correction, if an adjustment point is

set on the screen.

c During a heat run, be sure to keep lower the G’s screen VR of the focus pack from turning on the power of the set

until immediately before the cutoff adjustment in order to stabilize the G’s coupling liquid temperature.

GENERAL ADJUSTMENTS

– 18 –

GENERAL ADJUSTMENTS

Focus adjustment method (2/2)

GREEN lens focus adjustment

Model Metodo di regolazione

[1] 40WH08 series (1)Receive internal crosshatch signals, use the lens cap, and concentrate on the single color of G.

(2)Watch the horizon of both the left and right ends on the horizontal axis of the screen, adjust the lens focus of G to

Adjusting points

Left end

Screen

Right end

the very best, and check that the left-and-right focus balance is appropriate. (Check left-and right balance of G lens focus)

y Use the left (or right) end crosshatch and make the best adjustment on the G’s lens focus. x Check the right (or left) end focus.

(3)If the left and right lens focus is not properly balanced (tendency for flare), divide and adjust it to the middle grade. (4)Check on the periphery, and make certain that the focus grade lies within a tolerable level (including flare).

ø 100 mm ø 100 mm

(Point of observation) Inside the circle of 100mm that is in contact with left and right bezels.

Completion of adjustment

– 19 –

Item Name Setting Input signal Measuring point Adjusting method

Screen position adjustment

HIT VLIN

HIT

Vertical amplitude adjustment (PAL WIDE)

Vertical amplitude adjustment (PAL Super-live)

Vertical amplitude adjustment (PAL cinema)

Picture mode 1

Picture mode 1 WIDE mode

Picture mode 1 Super-live mode

Picture mode 1 CINEMA mode

Phillips pattern (PAL-I)

Screen adjustment

(1)Adjust the vertical and horizontal

screen positions and centering magnet so that the central + mark of the dummy screen and the + mark of the Phillips

pattern can overlap in conformity. Carry this out individually on 3 tubes of R, G, and B

(Note) Do not move HPOS, VPOS data (1)Turn the screen size to WIDE.

(2)In the first place, shorten the vertical

amplitude using HIT data until the upper and low flags emerge on the screen.

(3)Then, extend the vertical amplitude with

the HIT data until either upper or lower flag end conforms to the screen end (Adjust the vertical center of the pattern to the central mark of the screen.)

(1)Turn the screen size to Super-live. (2)Adjust with the HIT so that the top and

bottom of the inner circle of Phillips pattern will contact the screen edge. (Note) VLIN adjustment is not performed.

(1)Turn the screen size to CINEMA. (2)Adjust the registers on the top and

bottom of the Phillips pattern

(Note) Do not touch the centering magnet

Adjustment standard

Less than ø7mm

Upper and lower flags are to be in contact

The inner circle is to contact the screen edge

GENERAL ADJUSTMENTS

Completion of adjustment

GENERAL ADJUSTMENTS

– 20 –

Item Name Setting Input signal Measuring point Adjusting method

HIT

WID

NHIT NLIN

NHIT

Vertical amplitude adjustment (PAL SUBTITLE)

Vertical amplitude adjustment PAL WIDE

Vertical amplitude adjustment NTSC WIDE

Vertical amplitude adjustment SUPER-LIVE NTSC

Vertical amplitude adjustment CINEMA NTSC

Vertical amplitude adjustment SUB-TITLE NTSC

Picture mode 1 Super-live mode

Picture mode 1 WIDE mode

Picture mode 1 SUPER-LIVE mode

Picture mode 1 CINEMA mode

Picture mode 1 SUB-TITLE mode

Phillips pattern (PAL-I)

Monosco signals NTSC LEADERE-435B

Monosco signals NTSC LEADER-435B

Screen adjustment

(1)Turn the screen size to SUB-TITLE. (2)Adjust the registers on the top and

bottom of the Phillips pattern as shown in the next page.

(Note) Do not touch the centering magnet (1)Turn the screen size to WIDE.

(2)The left and right flags of the Phillips

pattern are to contact the screen edge.

(3)The user center position adjustment is to

be 0.

(1)Turn the screen size to WIDE mode. (2)The 1st line on the screen is to be

hidden by the mask.

(1)Turn the screen size to SUPER-LIVE

mode.

(2)Adjust so that the upper side 3rd line on

the screen will contact the screen edge.

(3)Do not adjust the NVLI. (1)Turn the screen size to CINEMA mode.

(2)Adjust so that the character 30 on the

upper, lower, and left-and-right ends will contact the screen edge.

(1)Turn the screen size to SUB-TITLE

mode.

(2)Adjust so that the upper side 5th line of

the register on the screen will contact the screen.

(3)The NVLI is not to be adjusted.

Adjustment standard

Completion of adjustment

– 21 –

Item Name Setting Input signal Measuring point Adjusting method

NWIDE Horizontal

amplitude adjustment WIDE NTSC

Picture mode 1 WIDE mode

Monosco signals NTSC LEADER-435B

Screen adjustment (1)Turn the screen size to WIDE.

(2)Adjust the 2nd left register to the left

edge of the screen.

Adjustment standard

GENERAL ADJUSTMENTS

1. Screen Adjustment

The four PAL screens Wide/4:3, Super Live, Cinema and Subtitle, and the four NTSC screens Wide/4:3, Super Live, Cinema and Subtitle are adjusted. When adjusting, input an external signal for matching the sync.

CAUTION: The con vergence circuit eliminates screen distortion but cannot mak e large corrections such as changing the overall screen size. Use caution because the protection circuit will be activated if corrections are excessively large. Before starting to adjust the various screens, alwa ys adjust the v ertical size (HIT) and horizontal size (WID) by changing the main deflection data.

Execute the adjustment screens in the sequence Wide/4:3 → Super Live → Cinema → Subtitle for both PAL and

NTSC.

GENERAL ADJUSTMENTS

1-1. Entering Adjustmet Menu

CONVERGENCE ADJUSTMENT

+ + MENU key

F+7 key

Menu screen

CONVER ADJUST MENU

Adjust PAL Wide

PAL Wide to Others

Adjust PAL S.Live

Adjust PAL Cinema

Adjust PAL S.title

PAL to NTSC (Wide)

PAL to NTSC (ALL)

Adjust NTSC Wide

NTSC Wide to Others

Adjust NTSC S.Live

Adjust NTSC Cinema

Adjust S.title

Service data indication

MENU SELECTION

+ key

SCREEN ADJUSTMENT

CALL: to exit

Adjusting screen

+ key

– 22 –

1-2. Remote Control Key

i g

1 2 3

4 5 6

7 8 9

INFO.

NexTView

MENU EXIT

SIZE

CALL TEXT

ENTER

o key ...............Push this key twice and the set con-

sole menu key to enter the service

F key .................Push this key and 7 key to enter

Yellow key Convergence adjusting screen key.

5 key .................

2 key ................. Cursor up / adjusting point up.

4 key ................. Cursor left / adjusting point left

8 key ................. Cursor down / adjusting point down

6 key ................. Cursor right / adjusting point right

3 key .................Cursor colour change (Adjusting

+ key .................Excutetion key on convergence menu.

s key ................ Up key on convergence menu.

t key ................ Down key on convergence menu.

mode .

the con vergence menu.

..........

Cursor shift / data change mode change-over.

colour selection).

GENERAL ADJUSTMENTS

VTR / DVD

Fig. 2

– 23 –

1-3. Adjusting Screen

1) Adjusting menu

NO Description

1 Adjust PAL Wide Used for manual adjustment of the Wide/4:3 screen in the PAL mode.

2 P AL Wide to others Automatically sa ves approximate supplementary data f or the other P AL screens based

GENERAL ADJUSTMENTS

3 Adjust PAL S.Live Used for manual adjustment of the PAL Super Live screen.

4 Adjust PAL Cinema Used for manual adjustment of the PAL Cinema screen.

5 Adjust PAL S.title Used for manual adjustment of the PAL S.title screen.

Item

Returns to the original screen data screen before data conversion, explained below.

on the PAL Wide/4:3 screen data. First, the PAL Wide/4:3 screen data are converted to Super Live and the values are saved. Next, the data are converted to Cinema and the values are saved. Finally, the data are converted to Subtitle and the values are sav ed, and then the oper ation ends . Manually check the other screen modes as described below and make corrections if distortion, etc., is present.

Please be aware that all PAL screens are re-adjusted when this menu is selected and executed.

Select this mode for Super Live screen color matching and distortion adjustment. Use the specified dimensions when adjusting.

Select this mode for Cinema screen color matching and distortion adjustment. Use the specified dimensions when adjusting.

Select this mode for S.title screen color matching and distortion adjustment. Use the specified dimensions when adjusting.

6 PAL to NTSC (Wide) PAL Wide/4:3 screen data is calculated, converted to NTSC Wide/4:3 approximate

data and saved. To assure accurate adjustments, select the manual mode explained below and chec k, then apply color matching and distortion adjustments.

7 PAL to NTSC (All) Data for all PAL screens is converted to approximate data for the NTSC screens and

saved. To assure accurate adjustments, select the manual mode explained below and chec k, then apply color matching and distortion adjustments.

8 Adjust NTSC Wide Used for manual adjustment of the NTSC Wide/4:3 screen.

Select this mode for Wide/4:3 screen color matching and distortion adjustment.

Use the specified dimensions when adjusting.

9 NTSC Wide to others Approximate supplementary data for the other NTSC screens is automatically saved

based on the NTSC Wide/4:3 screen data. First, the NTSC Wide/4:3 screen data are converted to Super Live and the values are saved. Next, the data are converted to Cinema and the values are saved. Finally, the data are converted to Subtitle and the values are sav ed, and then the oper ation ends . Manually check the other screen modes as described below and make corrections if distortion, etc., is present.

Please be aware that all NTSC screens are re-adjusted when this menu is selected and executed.

– 24 –

NO Description

Item

10 Adjust NTSC S.Live Used for manual adjustment of the NTSC Super Live screen.

Select this mode for Super Live screen color matching and distortion adjustment. Use the specified dimensions when adjusting.

11 Adjust NTSC Cinema Used for manual adjustment of the NTSC Cinema screen.

Select this mode for Cinema screen color matching and distortion adjustment. Use the specified dimensions when adjusting.

12 Adjust NTSC S.title Used for manual adjustment of the NTSC Subtitle screen.

Select this mode for Subtitle screen color matching and distortion adjustment. Use the specified dimensions when adjusting.

2) Adjustment Screen

X : 1 Y : 1 C : R S : 08

GENERAL ADJUSTMENTS

Wide

Displayed when the cursor blinks and cleared when the cursor lights steady.

X Cursor horizontal position display

Displayed when the cursor blinks and cleared when the cursor lights steady.

Displays the current screen mode.

Y Cursor vertical position display C Cursor color select display S Menu select display

3) Adjustment Sequence When the initial screen opens, X = 1, Y = 1, C = R and S = [Select Menu] are displayed as the defaults. The cursor can now be moved up, down, left and right using the (2), (8), (4) and (6) keys of the remote control. Select the desired adjustment and press the (5) key; the cursor will light steady and the screen display will be cleared. Again press the (2), (8), (4) and (6) keys of the remote control to adjust the shape of the screen. When adjustment has been completed, press the (+) key to return to the Adjustment Menu. When all of the screen adjustments ha ve been completed, turn off the main power supply of the set to reset the menu.

– 25 –

2. Case Study

In many cases, color matching problems can be solved by returning the HIT and WID data for main deflection to the initial adjustment values. Convergence cannot be re-adjusted in the following cases.

2-1 When the CRT has been replaced

Main deflection re-adjustment and color matching are necessary when the CRT has been replaced. Use the following procedure.

1. Replace the blue and red CRTs.

2. Perform the blue and red yoke horizontal adjustments in relation to the green CRT. Press the yokes and speed modulation coils + alignments onto the CRTs and fasten after making sure that there are no gaps.

3. Adjust the blue and red alignments (refer to the detailed alignment adjustment item).

4. Use centering magnets to center the blue and red CRTs in relation to the green CRT.

5. Adjust the main deflection HIT and WID data, using the most accurate location in relation to the green as data.

6. Use convergence to match the colors for each screen. Green will not work at this time.

GENERAL ADJUSTMENTS

7. When the convergence adjustments have been completed for all screens, then replace the green CRT.

Repeat the procedures in steps 2 - 5 for the green CR T but this time use con vergence to match the colors using red and blue as reference.

2-2 When replacing the convergence unit

Generally , all of the screens m ust be re-adjusted when the conv ergence unit is replaced, b ut the process can be greatly shortened by using the following method.

1. Replace the memory (Q711, Q712, Q713) of the new unit with the memory (Q711, Q712, Q713) of the defective unit. This makes it possible to quickly reproduce the previous screen status when installed in the set.

2. Install the new unit with the old memory in the set and turn on the power . The entire screen will move linearly in either the vertical or horizontal direction.

3. Use centering magnets to re-adjust the green, red and blue centers.

4. There is possibility of color mismatching or differences in screen siz e when the various screens are check ed. In such case, adjust the main deflection and apply a slight amount of convergence color matching.

2-3 When none of the above cases apply (rare case)

An unexpected situation or major operational error, etc., could be considered but it is recommended that all screens be matched starting from the beginning. If the initial positions of the centering magnets are unknown, disconnect the connectors for the convergence sub-yoke outputs one at a time, adjust the CRT centering and then start the following adjustments.

1. Make sure that there is plenty of room for the static cross convergence to be moved left, right, up and down. If sufficient space is not available, move to an appropriate location and then re-adjust the centering.

2. Enter the convergence adjustment mode and call out the menu. (Leave the PAL signal connected.)

3. Select 1. Adjust PAL Wide and adjust the PAL mode Wide/4:3 screen manually in accordance with the dimension

diagram.

4. When the Wide/4:3 screen adjustment has been completed, return to the Main Menu and select 2. PAL Wide to

others.

The screen will change automatically and the Wide, Cinema and Subtitle screens will be created automatically.

5. Next, select 3. Adjust PAL S.Live and mainly adjust in the horizontal direction in accordance with the dimension

diagram.

6. Next, select 4. Adjust PAL Cinema and fine adjust to remove any Cinema screen distortion.

7. Next, select 5. Adjust PAL Subtitle and fine adjust to remove any Subtitle screen distortion.

8. Next, select 7. PAL to NTSC (ALL), then calculate and copy the data for all PAL screens in the NTSC mode. At this

time, the calculations and screen shape changes will be performed automatically and the NTSC screen data corresponding to the PAL screens will be transferred.

9. Select in sequence 8. Adjust NTSC Wide, 10. Adjust NTSC S.Live, 11. Adjust NTSC Cinema and 12. Adjust NTSC

Subtitle, check the respective NTSC screen modes and, if necessary, adjust for any distortion. All of the screens can be adjusted with the above process but make every effort not to change the factory data unless

absolutely necessary. Try not to change the convergence data any more than necessary.

– 26 –

3 Screen adjustment dimensions

3-1 WIDE/4:3 (PAL mode)

380.0

432.5

228.0

76.0

235

207.5

124.5

41.5

(screen center)

41.5

124.5

207.5 235

76.0

228.0

380.0

432.5

GENERAL ADJUSTMENTS

3-2 Super Wide (PAL mode)

428.0

372.0

218.5

72.5

249.0

220.0

130.5

(pattern center)

-5

49.5

136.5

221.0

249.0

72.5

218.5

372.0

428.0

Caution: Do not perform the VLIN adjustment.

– 27 –

3-3 Cinema (PAL mode)

Note: The cursor will move outside the screen limits in the Cinema mode; therefore, be careful to consider the position

of the cursor displayed on the screen when making adjustments.

262.5

227.5

157.5

52.5

GENERAL ADJUSTMENTS

3-4 Subtitle (PAL mode)

Note: The cursor will move outside the screen limits in the Subtitle mode; therefore, be careful to consider the position

of the cursor displayed on the screen when making adjustments.

Note: Please be aware that the Subtitle screen con vergence pattern center is located at the center of the screen b ut the

image center is located approximately 13mm above that.

432.5

380.0

228.0

76.0

52.5

157.5

227.5

262.5

76.0

228.0

380.0

432.5

272 240

Screen limit changed

432.5

380.0

228.0

76.0

– 28 –

76.0

228.0

380.0

144

240 272

432.5

3-5 WIDE/4:3 (NTSC mode)

231 198

(screen center)

432.5

380.0

3-6 Super Live (NTSC mode)

228.0

76.0

198 231

76.0

228.0

380.0

432.5

249 213

105

(pattern center)

-5

GENERAL ADJUSTMENTS

428.0

372.0

218.5

72.5

Caution: Do not perform the VLIN adjustment.

– 29 –

72.5

218.5

372.0

112

216 249

428.0

3-7 Cinema (NTSC mode)

Note: The cursor will move outside the screen limits in the Cinema mode; therefore, be careful to consider the position

of the cursor displayed on the screen when making adjustments.

Note: Please be aware that the Cinema screen convergence pattern center is located at the center of the screen but the image center is located approximately 13mm above that.

GENERAL ADJUSTMENTS

287 246

123

246 287

432.5

380.0

228.0

76.0

228.0

380.0

432.5

3-8 Subtitle (NTSC mode)

Note: The cursor will move outside the screen limits in the Subtitle mode; therefore, be careful to consider the position

of the cursor displayed on the screen when making adjustments.

Note: Please be aware that the Subtitle screen convergence pattern center is located at the center of the screen but the image center is located approximately 32mm above that.

266 228

114

228 266

432.5

380.0

228.0

76.0

228.0

380.0

432.5

– 30 –

+ 68 hidden pages