Toshiba S9S Schematic

FILE NO. 060-200101

To CTV

SERVICE MANUAL

COLOUR TELEVISION

S9S Chassis

20N7XE

PRINTED IN JAPAN, Jan., 2001 T

CHAPTER 1 GENERAL ADJUSTMENTS

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

SET-UP ADJUSTMENT ............................................................................................................................................ 4

SERVICE MODE ......................................................................................................................................................6

DESIGN MODE ........................................................................................................................................................9

ELECTRICAL ADJUSTMENT ................................................................................................................................ 10

CIRCUIT CHECK....................................................................................................................................................17

GENERAL ADJUSTMENTS

CHAPTER 2 SPECIFIC INFORMATIONS

SETTING & ADJUSTING DATA ..............................................................................................................................18

LOCATION OF CONTROLS ................................................................................................................................... 19

PROGRAMMING CHANNEL MEMORY................................................................................................................. 20

CIRCUIT BLOCK DIAGRAM ..................................................................................................................................21

CHASSIS AND CABINET REPLACEMENT PARTS LIST......................................................................................22

PC BOARDS BOTTOM VIEW.................................................................................................................................29

TERMINAL VIEW OF TRANSISTORS ................................................................................................................... 33

SPECIFIC INFORMATIONS

SPECIFICA TIONS .................................................................................................................................................. 37

APPENDIX:

CIRCUIT DIAGRAMS

– 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 abov e 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 v oltage (A), (B) & A C v oltage (C) (See SETTING & ADJUSTING DATA on page 18)

Each time a receiver requires servicing, the high voltage should be checked f ollowing the HIGH VOLT AGE 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 f ollowing 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 CR T 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. F or contin ued 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 NO TICE below.

GENERAL ADJUSTMENTS

SPECIFIC INFORMATIONS

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 b y using replacement components rated for higher voltage, w attage, etc. Replacement parts which have these special saf ety 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 –

WARNING: BEFORE SERVICING THIS CHASSIS, READ THE “X-RAY RADIATION PRECAUTION”, “SAFETY PRECAUTION” AND “PRODUCT SAFETY NOTICE” ON PAGE 3 OF THIS MANUAL.

■ The following adjustments should be made when a complete realignment is required or a new picture tube is installed. Perform the adjustments in order as follows :

1. Color Purity

2. Convergence

3. White Balance

Note: • The PURITY/CONVERGENCE MAGNET assembly and rubber wedges need mechanical positioning.

Refer to figure 1.

GENERAL ADJUSTMENTS

COLOR PURITY ADJUSTMENT NOTE : Before attempting any purity adjustments, the receiver

1. Demagnetize the picture tube and cabinet using a degauss-

2. Set the brightness and contrast to maximum.

3. Use a green raster from among the built-in test signals.

4. Loosen the clamp screw holding the yoke and slide the

• Mounting position of the purity magnet assembly should fit to same position as old one because slightly difference to the position depend on a tube.

There are no adjustment of purity and convergence in some picture tube (Unified with purity magnet)

should be operated for at least fifteen minutes.

ing coil.

yoke backward or forward to provide vertical green belt (zone) in the picture screen.

SPECIFIC INFORMATIONS

SET-UP ADJUSTMENT

5. Remove the Rubber Wedges.

6. Rotate and spread the tabs of the purity magnet (See figure 2.) around the neck of the picture tube until the green belt is in the center of the screen. At the same time , enter the raster vertically.

7. Slowly move the yoke forward or backward until a uniform green screen is obtained. Tighten the clamp screw of the yoke temporarily.

8. Check the purity of the red and blue raster.

GLASS CLOTH TAPES

DEFLECTION YOKE

29.1mm(28", 29") 25mm(25") 19mm(19", 20", 21") 14mm(13", 14")

PURITY/ CONVERGENCE MAGNET ASS'Y

Figure 1.

TEMPORARY MOUNTING

RUBBER WEDGE

ADHESIVE

DEFLECTION YOKE

– 4 –

CONVERGENCE ADJUSTMENTS

NOTE: Before attempting any convergence adjustments, the

receiver should be operated for at least fifteen minutes.

■ CENTER CONVERGENCE ADJUSTMENT

1. Use the cross-dot pattern from among the built-in test signals.

2. Set the brightness and contrast for well defined pattern.

3. Adjust two tabs of the 4-Pole Magnets to change the angle between them (See figure 2.) and superimpose red and blue vertical lines in the center area of the picture screen.

4. Turn the both tabs at the same time keeping the angle constant to superimpose red and blue horizontal lines at the center of the screen.

5. Adjust two tabs of 6-Pole Magnets to superimpose red/ blue line and green one. Adjusting the angle affects the vertical lines and rotating both magnets affects the horizontal lines.

6. Repeat adjustments 3, 4, 5 keeping in mind red, green and blue movement, because 4-Pole Magnets and 6-Pole Magnets have mutual interaction and make dot movement complex.

6-POLE

4-POLE

MAGNETS

ADJUST THE ANGLE (VERTICAL LINES)

■ CIRCUMFERENCE CONVERGENCE ADJUSTMENT

1. Loosen the clamping screw of deflection yoke slightly to allow the yoke to tilt.

2. Temporarily put a wedge as shown in figure 1. (Do not remove cover paper on adhesive part of the wedge.)

3. Tilt front of the deflection yoke up or down to obtain better convergence in circumference. (See figure 3.) Push the mounted wedge into the space between picture tube and the yoke to fix the yoke temporarily.

4. Put other wedge into bottom space and remove the cover paper to stick.

5. Tilt front of the yoke right or left to obtain better convergence in circumference. (See figure 3.)

6. Keep the yoke position and put another wedge in either upper space. Remove cover paper and stick the wedge on picture tube to fix the yoke.

7. Detach the temporarily mounted wedge and put it in another upper space. Stick it on picture tube to fix the yoke.

8. After fixing three wedges, recheck overall convergence. Tighten the screw firmly to fix the yoke and check the y oke is firm.

9. Stick three adhesive tapes on wedges as shown in figure

FIXED

GENERAL ADJUSTMENTS

ROTATE TWO TABS AT THE SAME TIME (HORIZONTAL LINES)

PURITY MAGNETS

CONVERGENCE MAGNET ASSEMBLY ADJUSTMENT OF MAGNETS

Figure 2.

BLU RED

BLU

RED

4-POLE MAGNETS MOVEMENT

BGR

R G B

RGB

RED/BLU

GRN

Center Convergence by Convergence Magnets

B G R

RED/BLU GRN

6-POLE MAGNETS MOVEMENT

B G R

BGR

RGB

R G B

SPECIFIC INFORMATIONS

INCLINE THE YOKE UP (OR DOWN)

Circumference Convergence by DEF Yoke

Figure 3. Dot Movement Pattern

INCLINE THE YOKE RIGHT (OR LEFT)

– 5 –

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.

GENERAL ADJUSTMENTS

2. DISPLAYING THE ADJUSTMENT MENU

1) Press MENU button on TV.

Adjustment mode

ITEM DATA

3. KEY FUNCTION IN THE SERVICE MODE

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

SPECIFIC INFORMATIONS

A single horizontal line ON/OFF: - / - - button (on Remote) or a button (on TV) 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 “CNTX” (or “SCNT”) selection : 4 button “COLC” selection : 5 button “TNTC” selection : 6 button Test audio signal ON/OFF (1kHz) : 8 button Self diagnostic display ON/OFF : 9 button

Item Data

Press

Item Data

(Service mode display)

Service mode

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.

– 6 –

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 18)

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. Perform “Auto search Memory” on the owner’s manual.

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

7. TEST SIGNAL SELECTION

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

GENERAL ADJUSTMENTS

Signal off

NTSC signals (14 patterns)

PAL signals (14 patterns)

Signals Picture

• Red raster

• Green raster

• Blue raster

• All Black

• All White

• Black & White

• Black cross-bar

• White cross-bar

• Black cross-bar on green raster

• Black cross-hatch

• White cross-hatch

• Black cross-dot

• White cross-dot

SPECIFIC INFORMATIONS

• H signal (white)

• H signal (black)

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

– 7 –

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.

23******



POWER : 00



BUS LINE : OK



 BUS CONT : OK



 BLOCK : UV V1 V2



(or SYNC) QV01 QV01S

GENERAL ADJUSTMENTS

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 exist 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.

 Part number of microcomputer (QA01)  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 CHECK ----“OK” is normal.

“SCL(SCL1)-GND”...............SCL-GND short circuit

“SDA(SDA1)-GND” .............. SDA-GND short circuit

“SCL(SCL1)-SDA (SDA1)”... SCL-SDA short circuit

 BUS CONT ----“OK” is normal.

When indication shows “Q uuu NG”, the device with

SPECIFIC INFORMATIONS

the number may possibly be damaged.

 BLOCK ----“OK” is normal.

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

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

NOTE: Component which controls character display on

screen is QT01 (TELETEXT IC.). If this display function fails to operate due to damage in QT01, self diagnosis procedure is as follows. (1) In case that power 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 power indicator is blinking with

interval of 1 second; Protecting circuit does not operate, but a part of Bus line does not operate normally. Check Bus line.

– 8 –

1. ENTERING TO DESIGN MODE

1) Select the Service mode.

DESIGN MODE

2) While pressing o (or 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.

Refer to table-3 for data of design mode. (See SETTING & ADJUSTING DATA on page 18)

3. ADJUSTING THE DATA

Pressing of VOLUME s or t (; +/–) button will change the value of data.

Press

ITEM DATA

GENERAL ADJUSTMENTS

SPECIFIC INFORMATIONS

– 9 –

ELECTRICAL ADJUSTMENT

ITEM ADJUSTMENT PROCEDURE

FOCUS VR ADJ.

SUB-BRIGHTNESS (BRTC)

GENERAL ADJUSTMENTS

SPECIFIC INFORMATIONS

Note: Constrict the picture height

until the vertical retrace line appears adjusting the item HIT (HEIGHT).

HORIZONTAL POSITION ADJUSTMENT (HPOS)

VERTICAL POSITION ADJUSTMENT (VPOS)

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

2. Press the TV/VIDEO button on the Remote until the black cross-bar pattern appears on the screen.

3. Adjust the FOCUS control (on T461) for well defined scanning lines on the picture screen.

1. Set CONTRAST to minimum, and BRIGHTNESS to center by adjusting user controls.

2. Set the TV in service mode to get white cross-bar of inside pattern.

3. Select BRTC (brightness correction), and adjust the ; – /+ button to reduce the value so that white portion of inside pattern slightly light.

4. Adjust ; – /+ button to increase the data value of BRTC, and set it just before the difference between the belt of vertical retrace and the border of black portion of inside pattern is visible. After that, return vertical height and contrast.

1. Set the TV in service mode, and get

black or white cross-bar signal with VIDEO button on remote hand unit.

2. Select either HPOS (Hor izontal pic-

ture phase) or VPOS (V ertical picture phase) with CHANNEL s, t buttons, and adjust horizontal or vertical picture position in the center of screen with VOLUME ; – /+ buttons.

Belt of vertical retrace

VERTICAL AMPLITUDE ADJUSTMENT (HIT)

1. Set the TV in service mode, and get

black or white cross-hatch signal with VIDEO button on remote hand unit.

2. Select HIT (Vertical amplitude) with

CHANNEL s, t buttons, and adjust vertical amplitude with VOLUME ; – /+ buttons so that vertical amplitude lacks a little.

3. Adjust vertical amplitude with VOL-

UME ; – /+ buttons so that the first bar on cross-hatch signal touches edge of screen.

– 10 –

The first

ITEM ADJUSTMENT PROCEDURE

WHITE BALANCE ADJUSTMENT

CUTOFF ADJUSTMENT

•

(RCUT) (GCUT) (BCUT)

DRIVE ADJUSTMENT

•

(GDRV) (BDRV)

1. Set Contrast to 40, and brightness to +20 by picture control.

2. Set the TV in service mode, and get the inside W/B adjusting signal with VIDEO button.

3. Select RCUT, GCUT and BCUT with CHANNEL s, t buttons, to set individual values to 20, and to set GDR V and BDRV to 80 with VOLUME ; – /+ buttons.

4. Press VIDEO button on TV set and rotate Screen VR to get one slight horizontal line on screen. Note: Every pressing of VIDEO button provides Horiz ontal line picture and Normal picture alternately.

5. Press VIDEO button to release horizontal line picture, and select the two other colors which did not light in the above step with CHANNEL s, t buttons. Then tap VOLUME ; – /+ buttons so that three colors slightly light in the same lev el.

X To correct white balance in light area,

select GDRV and BDR V with CHANNEL s, t buttons to adjust.

X To correct white balance in dark area,

perform fine adjustment of RCUT , GCUT and BCUT.

Light area check

(to show white)

Dark area check

(to show black)

GENERAL ADJUSTMENTS

SPECIFIC INFORMATIONS

– 11 –

MODEL: S9S Series (Reference factory adjustments)

NO ADJUSTMENT

1. SUB CONTRAST (Measuring point) Q501 #14 R-OUT (Adjusting signal) Sub Bright (NTSC) signal (Adjusting method)

1. BUS data of Q501 RCUT (Q501 SUB ADDR:0C) → Initial value (20H) Yγ (Q501 SUB ADDR:08/D7) → OFF (0) WPL (Q501 SUB ADDR:08/D6) → OFF (1) P A CL (Q501 SUB ADDR:08/D5) → OFF (0)

GENERAL ADJUSTMENTS

SPEC V p-p

2. SUB COLOR PAL (THIS ADJUSTMENT AFTER SUB COLOR NTSC) (Measuring point) Q501 #12 B-OUT

SPECIFIC INFORMATIONS

(Adjusting signal ) Sub Bright (PAL) signal (Adjusting method)

COLOR (Q501 SUB ADDR:02/D7-DC) → MIN (00H)

2. Set user control to the standard 1

3. Change to adjust SCNT data (Q501 SUB ADDR:05/D4~D0). X It makes the point which doesn't have a change and it adjust with screen VR.

4. After adjustment, return the data which are set in steps 1, 2 above, to original data.

1. Set BUS data of Q501 to the same value as that of SUB TINT adjustment.

2. Set user control to the standard 1.

3. Change COLP data (COLC Difference data) to adjust the 6th peak amplitude of rainbow color bar.

Adjust the amplitude of color bar

(p-p value of the upper half)

4. After adjustment return the data set in steps 1,2 above, to the original data.

– 12 –

1.3 ± 0.2 V p-p

NO ADJUSTMENT

3. SUB COLOR SECAM (THIS ADJUSTMENT AFTER SUB COLOR NTSC) (Measuring point) Q501 #12 B-OUT (Adjusting signal) SECAM color bar signal (Adjusting method)

1. Set BUS data of Q501 to the same value as that of SUB TINT adjustment.

2. Set user control to the standard 1.

3. Change COLS data (COLC Difference data) to adjust the peak amplitude of SECAM

color bar.

Adjust the amplitude of color bar.

[A]V[B]V

4. After adjustment, return the data set in steps 1, 2 above to the original data.

V p-p

GENERAL ADJUSTMENTS

SPECIFIC INFORMATIONS

– 13 –

4. SUB TINT (Measuring point) Q501 #12 B-OUT (Adjusting signal) Sub Bright (NTSC) signal (Adjusting method)

1. BUS data of Q501 BDRV (Q501 SUB ADDR:0A) → Initial value (80H) BCUT (Q501 SUB ADDR:0E) → Initial value (20H) COLOR LIMITER (Q501 SUB ADDR:0F/D2) → OFF (0) MUTE (Q501 SUB ADDR:1B/D7~D6) → Y mute (10) P/N CD ATT (Q501 SUB ADDR:12/D5~D4) → 0dB (01)

GENERAL ADJUSTMENTS

S-field (Q501 SUB ADDR:1F/D7) → OFF (0) SCD ATT (Q501 SUB ADDR:1F/D6) → 0dB (0) P-ACL (Q501 SUB ADDR:18/D5) → OFF (0)

2. Set user control to the standard 1

3. Change to adjust TNTC data (Q501 SUB ADDR:03/D6D0) so that difference between 6th peak and 5th and 7th

peaks of rainbow color bar becomes 2:1.

SPECIFIC INFORMATIONS

4. After adjustment, return the data which are set in steps 1, 2 above, to original data.

5. SUB COLOR NTSC (Measuring point) Q501 #12 B-OUT (Adjusting signal) Sub Bright (NTSC) signal (Adjusting method)

1. Set BUS data of Q501 to the same value as that of Sub TINT adjustment.

2. Set user control setting to the standard 1

3. Change COLC data (Q501 SUB ADDR:02/D7~D0) to adjust the 6th peak amplitude of rainbow color bar.

0°

#5 #6 #7

–5°

#5 #6 #7

Adjust the amplitude of color bar.

(p-p value of the upper half)

–10°

#5 #6 #7

–5 ± 5 (˚ )

1.3 ± 0.2 V p-p

4. After adjustment, return the data set in steps 1 and 2 above, to the original.

– 14 –

6. SUB BRIGHT

(Adjusting signal) SUB Bright (PAL or NTSC) signal (Adjusting method)

1. Set user control setting to the standard 1.

2. Change BRTC data (Q501 SUB ADDR:01/D7D0) to set black collapse numbers by eye check.

SPEC 4 ± 1.5 BARS

7. WHITE BALANCE ADJUSTMENT (Adjusting method)

1. Set user control setting to the standard 1.

2. BUS data of Q501 GDRV (Q501 SUB ADDR:09) → Initial value (80H)

BDRV (Q501 SUB ADDR:0A) → Initial value (80H) RCUT (Q501 SUB ADDR:0C) → Initial value (20H) GCUT (Q501 SUB ADDR:0D) → Initial value (20H) BCUT (Q501 SUB ADDR:0E) → Initial value (20H)

3. Set the mode to the one horizontal line mode MUTE (Q501 SUB ADDR:1B/D7~D6) → H. Line (11)

BRIGHT (Q501 SUB ADDR:01) → Initial value (80H)

4. Change SCREEN VR to set it so that one of lines R, G and B will light slightly.

5. Change CUTOFF data to adjust so that each one of R, G and B will light slightly (for about white).

6. Release the H. Line mode.

7. Change B/G drive data and R/G/B CUTOFF data to adjust white balance in bright area and dark area.

NO ADJUSTMENT

8. SECAM BELL FILTER ADJUSTMENT (Measuring point) Q501 #36 B-Y OUT (Adjusting signal) Color bar (SECAM) signal (Adjusting method)

1. Connect resistor 1k ohm between color limiter terminal (Q501 #26) and 5V.

2. Connect resistor 100 ohm between Q501 #35 and 5V.

3. Set COLOR control data to "04H".

4. Set MICOM YS output to "H", and set Q501 to DIGITAL RGB mode.

5. Change BELL data (Q501 SUB ADDR:ifD1D0) to set it so that SECAM signal at #36 pip of Q501 (B-Y OUT) can be flat.

6. After adjustment, remove resistor 1k ohm between color limiter terminal (Q501 #26). and 5V, and remove resistor 100 ohm between Q501 #35 and 5V, to return COLOUR control. data to original.

GENERAL ADJUSTMENTS

SPECIFIC INFORMATIONS

Make flat the white part

SPEC %

– 15 –

NO ADJUSTMENT

9. SECAM OFFSET ADJUSTMENT (Measuring point) Q501#35 R-Y OUT

(Adjusting signal) Color bar (SECAM) signal (Adjusting method)

1. Change SRY data (Q501 SUB ADDR:11/D7~D4) to coincide level of black and white part in color differential signal (R-Y) to the level of H. BLK part.

GENERAL ADJUSTMENTS

2. Change SBY data (Q501 SUB ADDR:11/D3~D0) to coincide level of black and white part in color differential signal (B-Y) to the level of H. BLK part.

SPECIFIC INFORMATIONS

#36 B-Y OUT

SPEC B-Y/R-Y mV p-p

10. CHROMA TRAP ADJUSTMENT → NO ADJUSTMENT

11. H. CENT ADJUSTMENT (Point) Receiving adjustment (Adjusting signal) WG PHILIPS pattern

Do not use France SECAM pattern.

(Adjusting method) CONT=Maximum BRIGHT=Center COLOR=Center

Vary SUB Address [HPOS] to adjust picture center to screen center. (Set D-C to minimum by CRT adjusting magnetic field.)

12. V. HEIGHT ADJUSTMENT (Point) Receiving adjustment (Adjusting signal) WG PHILIPS pattern

Do not use France SECAM pattern.

(Adjusting method) CONT=Maximum BRIGHT=Center COLOR=Center

V ary SUB Address [VPOS] to adjust center of Philips pattern to screen center. Adjust SUB Address [HIT] so that top and bottom flags of Philips pattern can just be hidden.

– 16 –

13. V901 ADJUSTMENT (Point) C.CRT adjusting magnetic field (Adjusting magnetic field)

Correction field

Mid Near East

Russian

Asia, Hongkong

New Zealand, Australia

Adjusting procedure is based on working instruction of CPT Adjustment.

North field North field

Zero field

South field

Adjusting

perpendicular field

35 µT 35 µT

5 µT

–50 µT

Confirming

perpendicular field

35 µT 35 µT

5 µT

–50 µT

CIRCUIT CHECKS

HIGH VOLTAGE CHECK CAUTION: There is no HIGH VOLTAGE ADJUSTMENT on this chassis. Checking should be done following the steps

below.

1. Connect an accurate high voltage meter to the second anode of the picture tube.

2. Turn on the receiver. Set the BRIGHTNESS and CONTRAST controls to minimum (zero beam current).

3. High voltage must be measured below (B) kV.

GENERAL ADJUSTMENTS

SPECIFIC INFORMATIONS

Refer to table-1 for high voltage (B). (See SETTING & ADJUSTING DATA on page 18)

4. Vary the BRIGHTNESS control to both extremes to be sure the high voltage does not exceed the limit under any conditions.

– 17 –

+ 38 hidden pages

Toshiba S9S Schematic

TABLE OF CONTENTS

CHAPTER 1 GENERAL ADJUSTMENTS

SAFETY INSTRUCTIONS

SET-UP ADJUSTMENT

SERVICE MODE

DESIGN MODE

ELECTRICAL ADJUSTMENT

CIRCUIT CHECKS