TOSHIBA 43CJ337, 50VJ33Q service manual

FILE NO. 030-200403

SERVICE MANUAL

Colour Television

43VJ33Q

VJ13 Chassis

50VJ33Q

Published in Japan, May. 2004 (YC)

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

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

CONVERGENCE ADJUSTMENT ........................................................................................................................... 19

SCREEN AND MIRROR ALIGNMENTS ................................................................................................................. 25

CIRCUIT CHECKS ................................................................................................................................................. 26

CHAPTER 2 SPECIFIC INFORMATIONS

SETTING & ADJUSTING DATA ............................................................................................................................. 27

LOCATION OF CONTROLS................................................................................................................................... 28

PROGRAMMING CHANNEL MEMORY................................................................................................................. 30

MECHANICAL DISASSEMBLY .............................................................................................................................. 31

CHASSIS AND CABINET REPLACEMENT PARTS LIST ......................................................................................32

PC BOARDS BOTTOM VIEW................................................................................................................................. 45

TERMINAL VIEW OF TRANSISTORS ................................................................................................................... 55

CIRCUIT BLOCK DIAGRAM .................................................................................................................................. 57

SPECIFICATIONS .............................................................................................................................................. END

APPENDIX:

CIRCUIT DIAGRAM

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 power 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 26)

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 anyone 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 below.

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 by them cannot necessarily be obtained by 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.

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.

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.

Lens Assembly

CRT Assembly

CRT Anode Cap Assembly

S.V.M. Coil

4 Screws

CRT DRIVE Board

Deflection Yoke and Conver Yoke

Lens and Neck Components View

CRT Mounting

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 20.)

7. WHITE BALANCE ADJUSTMENT (page 14.)

Adjustments are complete.

Anode Cap

Silicon (On shaded area) TSE3843W #23960136

2 ~ 5 mm

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.

Screw for D.Y

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.

Anode lead holder

Screw for SVM coil

WARNING

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

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

PICTURE TUBE COMPONENTS ADJUSTMENT

ADJUSTING PROCEDURE IN REPLACING CRT

Cutoff

Lens focus

Electrical focus

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.

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.

User convergence center check

Centering (PAL)

Convergence adjustment (PAL/NTSC)

White balance

Sub bright adjustment

End

RGB FOCUS ADJUSTMENT

1. Connect a VIDEO signal generator which generates a cross-hatch pattern.

2. Receive a white cross-hatch pattern by pressing the signal slection key on the VIDEO signal generator.

3. Expose only RED by covering 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 pack 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 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.

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 -/-- 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 -/-- button on Remote. (Return to Normal

Picture)

(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-

)

Note: The aim of the above-described adjustment procedure

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.)

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 warming up time before the adjustment is less than 30 minutes. (The horizontal line in the screen middle section tends to be slightly redflared.)

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: Normally the most clearly visible point of the scanning

line is the sharpest point of the Green focus, however 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.

TILT ADJUSTMENT

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

CENTERING ADJUSTMENT

1. Stretch threads towards the center of the screen (top and bottom, left and right).

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

16. Use the focus VR of “B” of the focus 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.)

17. Check the BLUE focus of the whole screen and if necessary repeat steps 15 and 16.

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

2. Enter to the user's Convergence Adjustment Mode from the menu.

3. Adjust G centering magnet so that the cross pattern center comes to screen center.

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

5. Perform VERT. LINEARITY 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 pattern center comes to screen center.

LOCATION OF SCREEN AND FOCUS VR'S

To remove the Speaker grille and Front panel.

Speaker grille

RGB

SCREEN VR's

FOCUS VR's

REPLACEMENT OF HIGH VOLTAGE CABLE

ANODE LEAD

RUBBER BOOT

LEAD HOLDER

Fig. a

Z450 TPA5007

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 away Lead Holder.

NOTE : THE LEAD HOLDER IS ATTACHED TO

TPA5007 (Z450), BUT IS NOT ATTACHED TO ANODE LEAD AND ANODE CAP. RUBBER BOOT IS ATTACHED TO ANODE LEAD AND ANODE CAP.

2. Detaching Lead Holder

OLD ANODE LEAD

ANODE CAP

LOCK

RUBBER BOOT

LEAD HOLDER

Fig. b

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

WARNING

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

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

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.

SERVICE MODE

1. ENTERING TO SERVICE MODE

(Service mode display)

Item

Data

or Sound Mute

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

2) Press o button again to keep pressing.

2. DISPLAYING THE ADJUSTMENT MENU

1) Press MENU button on TV.

3. KEY FUNCTION IN THE SERVICE MODE

The following key entry during display of adjustment menu provides special functions.

Screen adjustment mode ON/OFF: -/-- (

) 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 “COLP” selection : 5 button “TNTC” selection : 6 button Convergence adj : YELLOW button Self diagnostic display ON/OFF : 9 button

1) Press o button once on Remote Control.

Adjustment mode

Press

Service mode

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.

4. SELECTING THE ADJUSTING ITEMS

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

Refer to table-2 for preset data of adjustment mode. (See SETTING & ADJUSTING DATA on page 26)

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 button on the TV. The initialization of QA02 has been complated.

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

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

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.

Indicated color of mode now selected : Green and Red

2300* * * *(SAA556*PS/M3/* * * *)



TIME : 000000



POWER : 0



BUS LINE : OK



BUS CONT : OK



BLOCK : UV V1 V2 V3



Indicated color of other modes : Black

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 exist in input signal line including QV01.

NOTE: (1) In case that "on timer" indicator is blinking with

interval of 0.5 seconds; it means protecting circuit (Current limiter) is operating, and circuit components may possibly be damaged. Check related components.

(2) In case that "on timer" indicator is blinking with

interval of 1 second; Protecting circuit does

 Part number of microcomputer (QA01)  Total hour of turn the TV on. (Unit: H)

not operate, but a part of Bus line does not operate normally. Check Bus line.

 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.

 BUS LINE ----“OK” is normal.

When indication shows “SDA-GND”, the SDA line may possibly be shorted to GND..

 BUS CONT ----“OK” is normal.

When indication shows “Q uuu NG”, the device with the number may possibly be damaged.

 BLOCK

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

( 3)

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

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)

Press

ITEM

DATA

2. SELECTING THE ADJUSTING ITEMS

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

Refer to table-3 for data of design mode. (See SETTING & ADJUSTING DATA on page 26)

3. ADJUSTING THE DATA

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

ELECTRICAL ADJUSTMENT

ITEM ADJUSTMENT PROCEDURE

WIDTH

(WID)

VERTICAL LINEARITY

(VLIN)

HEIGHT

(HIT)

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

2. Press the VOLUME t button to get the picture so the left or right edges of raster begins to lack.

3. Press the VOLUME s button to advance the data by 12 steps.

Note : Check the horizontal picture position is correct.

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

2. Receive the cross-hatch pattern which appears on the screen by the signal generator.

3. Press the VOLUME s or t button to obtain the picture of the best linearity

Center

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

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

3. Press the VOLUME s button to advance the data by 11 steps.

Note : Check the vertical picture position is correct.

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 -/-- button on Remote. (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 -/-- button on Remote. (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 RDRV and BDRV 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.

)

Reference factory adjustment

TP-V

TP-G

Adjusting

standards

ight 4±1.5 lines

vel up to the 3.25±0.1V(p-p)

Adjusting methods

0.05V(p-p)

1.6±0.05V(p-p)

2.10

ainbow color bar.

W/B, SCNT.

Applied the Image MUTE.

signals.

1) Adjust the amplitude of the r

2) Adjust after adjusting

Adjust the amplitude of the color bar.

1)2)3)

t can

Point that

starts lighting

y Tube and

ts lighting.

For details,

or each tube of G, R,

y repeating electrical focus and

vel of H.BLK.

vel of black and white signal par

VR to the point that star

Adjust the P-P value of the upper half.

(Y mute, DRV.CUT=40H)

adjust the screen

and B.

3) Directly observe the surface of Cathode Ra

4) Make above-mentioned adjustments f

1) Adjust to the best position b

refer to [focus

adjusting

method]

introduced in

the next page.

8750k-0.002uv

or each tube of G, R,

T except the axes under

ature of the bright part (103cd/m

ature of the dark part (17cd/m

adjustment.

and B.

2) Use the jig and shade the CR

3) Make above-mentioned adjustments f

± 25mV 0

Digital

voltmeter

y VCEN data.

oltmeter between TP-V

and TP-G and adjust it to 0 mV b

(No designation on polarity of degital voltmeter)

SIGNAL unit 2) Adjust the P-P value of the upper half.

(PAL)

(PAL-I signal) SIGNAL unit white peak.

WIDE mode signal adjustment

Audio system: I

center

signal

PA L

center

Items Names Settings Input signals Measuring points

BRTC Sub-bright Picture mode 1 Sub-bright Screen 1) Adjust the number of black collapsed lines of sub-br

SCNT Sub-contrast Picture mode 1 Sub-bright signal TP46B 1) Adjust amplitude from the pedestal le

COLP Sub-color Picture mode 1 Sub-bright TP46B

COLS Sub-color Picture mode 1 SECAM TP46B

color bar SIGNAL unit

SECAM TP02 1) Adjust so that the le

SECAM

center

R-Y Black level color bar SIGNAL unit be aligned with the le

SRY SECAM

CRT tubular 1) Darken the environment as much as possible.

screen 2) Set to factory-set screen adjusting MODE.

SECAM TP01 1) Adjust so that the le

color bar SIGNAL unit be aligned with the le

adjusting mode

R-Y Black level

SBY SECAM

Screen Screen Factory screen

adjustment

(PAL-I) adjustment optical focus adjustments

Crosshatch

signal

Picture mode 1 Retma signal Screen

Focus Focus

adjustment

Screen 1) Adjust the color temper

adjustment

icture mode 1

icture mode 1 Screen 1) Adjust the color temper

WIDE mode

Picture mode 1 Phillips Pattern Between TP-V 1) Connect a digital v

WIDE mode

DFS-100 Hz and TP-G

Dark part W/B P

voltage

VW/B

BDR

RCUT

BCUT

RDRV Bright part P

VCEN Midpoint

adjustment

Adjustment items Adjusting methods

Focus adjustment (Conditions)

- User adjustment: Dynamic mode, Cinema mode

- To be performed after centering magnet adjustment.

- Signal : Lens: R .... Crosshatch (PAL)

Electrical focus :

(Adjustment)

1. Common item

1) Make coarse adjustments in advance on the lens focus and electrical focus of each R, G, and B tube.

2. G adjustment

1) Set to the G monochrome by lens cap.

2) Receive the image of crosshatch.

G.... Crosshatch (PAL)

B .... Crosshatch (PAL)

R .... Crosshatch (PAL)

G.... Crosshatch (PAL)

B .... Crosshatch (PAL)

3) Adjust the G electric focus. Adjust the G electrical focus by the focus volume of focus block (Z410) so that the screen center will come to optimum focus. (Although the G electrical focus is to be adjusted to allow the scanning lines in the center of the screen to be seen most clealy, if G alignment and astigmatism are inferior with the appearance of vertical and horizontal flares in the center of and around the screen and if the lines become thicker, adjust to the best point observing the entire screen.)

4) Adjust the G lens focus. Keep an eye on the center of the crosshatch pattern and adjust so that the screen center will become clear. As a rough guide to decrease unevenness, adjust so that red flares on both sides of the crosshatch line will come to 1mm in thickness.

5) Repeat 3, 4, and attempt to further improve the focus quality.

Adjustment items Adjusting methods

Focus adjustment

Concerning items 1), 2), 3), and 5) of G adjustment, these are common to the ones on the previous page.

3. R adjustment

1) Set to the R monochrome by lens cap.

2) Receive the image of the internal crosshatched pattern.

3) Adjust the R electrical focus. Adjust by focus volume of the focus block (Z410) so that the screen center will come to optimum focus.

4) Adjust the R lens focus. Adjust so that the screen center will become the best.

5) Repeat 3, 4, and attempt to further improve the focus quality.

4. B adjustment

2/3L

1) Set to the B monochrome by lens cap.

2) Receive the image of internal crosshatch pattern.

3) Adjust the B electrical focus. Adjust the B electrical focus by using the focus VR on the focus block (Z410) so that the scanning line is the most distinct at the point of 2/3L left side from the screen center.

4) Adjust the B lens focus. Pay attention to the border of the blue line and the black (background) in the vicinity of the screen center. First of all, make coarse adjustments of the lens, and move the lens adjusting screw to the right at the point being considered as the best focus. Then, the lines of the border become clear. Check and confirm under the circumstance that a flare appears. On the contrary, if the lens adjusting screw is moved to the left from the situation, the flare will disappear, and at this point you will find a point from which the borderline itself begins to go out of focus. Adjust to the very point where the focus begins to go out.

Adjusting

standards

8 ± 1 flags

n r

k of th

k of the Phillips patte

Adjusting methods

dummy screen and the cross mar

can overlap precisely.

This will be carried out individually for the tubes of R, G, and B.

1) Adjust the vertical and horizontal screen positions using

(Caution) Do not move HPOS and VPOS data.

VLIN.

y th

ertically. If not, adjust

hen VLIN is adjustd, adjust the screen position b

lower flags appear on the screen.

1) Shorten the vertical amplitude by HIT data until the upper and

centering magnet.

2) The amplitude should be balanced v

3) Subsequently, lengthen the vertical amplitude by HIT data until

ten the amplitude

y WID data so that th

ight flags appear completel

izontal amplitude b

either upper or lower flag end is aligned with the screen end.

2) Lengthen the hor

y the mask.

ertically.

k to the left screen edge

ks will come to 8 in total (each 4 flags

number of register mar

at the left and right sides).

Settings Input signals Measuring points

Picture model Philips Pattern Screen

Items Names

Adjustment

adjustment the centering magnet so that the center cross mar

)

AL-I (P

DFS-100Hz (PAL-I)

of screen

position

CMUT-ON

ertical Picture model Philips Pattern

amplitude DFS-100Hz

adjustment

HITV

VLIN

PALW

WIDE

Screen 1) Lower the WID data in the beginning, and shor

Horizontal Picture mode 1 Philips Pattern

WID

adjustment horizontally until the left and r

CMUT-ON

DFS-100Hz (PAL-I)

adjustment

amplitude

Screen 1) Adjust to touch 16:9 frames of the The upper part of a screen.

adjustment

(PAL-I)

16:9 mode

CMUT-ON

Picture mode 1 Philips Pattern

amplitude

Vertical

adjustment

NTSC

HIT

adjustment 2) The amplitude should be balanced v

signal adjustment

DFS-120Hz signal

Picture mode 1 Monoscope Screen 1) The upper first one on the screen is to be hidden b

Vertical

adjustment

NHIT

NLIN amplitude

DFS-120Hz

Picture mode 1 Monoscope Screen 1) Adjust the 2.5th left register mar

amplitude

NTSC

NWID Vertical

Screen 1) Adjust to touch 16:9 frames of the The upper part of a screen.

adjustment

(PAL-I)

mode

adjustment

16:9 mode

Picture mode 1 Philips Pattern

amplitude

Vertical

NTSC

NHIT

adjustment

NTSC

1. SCREEN ADJUSTMENT

CONVERGENCE ADJUSTMENT

The adjustment is carried out on four screens; 4 : 3 and 16 : 9 screens in both PAL and NTSC modes. When making the adjustments, feed an external signal to make an synchronization.

Note:

The convergence circuit is a circuit to eliminate screen distortion and can not make a drastic correction such as to correct entire screen size. An excessive correction may actuate the protection circuit. So a care will be necessary.

1-1. Entering the Adjustment Menu

When receiving PAL (50Hz)

Conver Adjust MENU

Before proceeding to the adjustment for each screen, always perform the adjustments for vertical size (HIT) and horizontal size (WID) with the main deflection data changed.

Order of the adjusting screens is PAL 4 : 3 → PAL 16 : 9 → NTSC 4 : 3 → NTSC 16 : 9.

The menu order is 1 → 2 → 3 .... when the vertical sync is 50

Hz. (In this case, item 4~6 are not displayed)

The menu order is 4 → 5 → 6 .... when the vertical sync is 60

Hz. (In this case, item 1~3 are not displayed)

When receiving NTSC (60Hz)

1. Adjust PAL (50 Hz) 4:3

2. PALL 4:3 to Others

3. Adjust PAL 16:9

Conver Adjust MENU

4. Adjust NTSC (60 Hz) 4:3

5. NTSC 4:3 to NTSC 16:9

6 Adjust NTSC 16:9

Fig. 1

2. Picture

a) 50 Hz mode (PAL) . . . . Correcting point: Horizontal 8 x Vertical 8 (Arrow marks denote correcting point)

The first picture

Screen centerCursor (red)

(Blinking)

The first picture

Crosshatch pattern. Pattern colors are three color display. Cursor is blinking in red. When changed, condition is last memory state.

Cursor is .......... Data change mode in lighting,

Cursor shifting mode in blinking.

Display color shows the color that data change is possible. (Note: Red is displayed in yellow.)

The second picture

When entering from the first picture to the second picture, correcting wave of convergence is muted for one second. During this period, the changed data is transferred from RAM Q701 to E2PROM Q711, and saved.

The second picture

Data display

The second picture is indicated with data on top left of the first picture, therefore, convergence cannot be adjusted by this picture.

Caution:

, Receive suitable signal for adjustment. Centering of

green picture can be done in 50 Hz mode (PAL).

, Centering of 60 Hz mode (NTSC) can be adjusted by

convergence adjustment. Besides, decide the center by cross pattern of static convergence in menu, and adjust convergence from center to circumference.

+ 46 hidden pages

TOSHIBA 43CJ337, 50VJ33Q service manual

TABLE OF CONTENTS

CHAPTER 1 GENERAL ADJUSTMENTS

SAFETY INSTRUCTIONS

CRT ASSEMBLY REPLACEMENT AND MOUNTING

PICTURE TUBE COMPONENTS ADJUSTMENT

SERVICE POSITION

SERVICE MODE

DESIGN MODE

ELECTRICAL ADJUSTMENT

CONVERGENCE ADJUSTMENT