Toshiba 43A10, 43AX60, 50A50, 50A60, 55A60 Schematic

FILE NO. 023-200023

SERVICE MANUAL

COLOR TELEVISION

N0NSP Chassis

43A10, 43AX60

(TAC0054)

(TAC0057)

– SUMMAR Y –

43A10, 43AX60 are the same as 50A60 except for the parts and bus data of micro-processor, Convergence ajustment and Mechanical disassembly tabled on back of this sheet. Use this service manual together with the service manual of 50A60, 50A50, 55A60, 61A60 (File No. 020-200012).

PUBLISHED IN JAPAN. Jul., 2000 So

SETTING & ADJUSTING DATA DIFFERENCES

SERVICE MODE

ADJUSTING ITEMS AND DATA IN THE SERVICE MODE:

Item

HIT VSC WID LIN PARA TRAP

DESIGN MODE

ADJUSTING ITEMS AND DATA IN THE DESIGN MODE:

Item Name of adjustment Preset Data Data

OPT1 OPT2

OPTION 1 OPTION 2

Name of adjustment Preset

V-HEIGHT V-S CORRECTION PICTURE WIDTH V -LINEARITY E-W PARABOLA(DPC) TRAPEZIUM

Table-2

Table-3

64H 10H 28H 12H 29H 10H

80H 00H

Data

5EH 0EH

29H 11H 26H 20H

C1H

03H

– 2 –

CONVERGENCE ADJUSTMENT

Adjust convergence from center to circumference in order.

1. Select the adjustment mode following the steps on page 9 of original service manual.

KEY FUNCTION IN THE CONVERGENCE ADJUSTMENT:

Up : 2 button Selet Green color: 3 button Left : 4 button Blinking of cursor ON/OFF: 5 button Right: 6 button Adjust mode ON/OFF: 7 button Down: 8 button Erase Green line: 0 button Erase Red line: 100 button Erase Blue line: CHRTN (ENT) button

2. Press “7” button to display the built-in cross-hatch pattern.

RCUT 40H

21.5 (43")

26.5 (50")

28.5 (55")

31.0 (61")

Cursor

P = 43.7 x14 (43")

50.5 x14 (50")

55.8 x14 (55") 62 x14 (61")

Note:

Adjusting procedure in replacing convergence board.

1. User convergence center check. Make sure the best convergence setting is about the center of adjustable range.

2. CENTERING ADJUSTMENT

3. PICTURE POSITION ADJUSTMENT

4. HIT, WID ADJUSTMENT

5. CONVERGENCE ADJUSTMENT

21.5 (43")

3.5 (43", 50")

4.0 (55")

5.0 (61")

P = 72.2 x12 (43")

84 x12 (50")

92.5 x12 (55")

102.5 x12 (61")

3.5 (43", 50")

4.0 (55")

5.0 (61")

26.5 (50")

28.5 (55")

31.0 (61")

The pattern includes three colors (R, G, B). The cursor should be blinking in Red. This means that the Red color is adjustable. Adjustment around cursor can be done.

3. Press “3” button to select Green color to be adjusted.

4. Press “5” button to stop the blinking of cursor.

5. Press “2 (up)”, “8 (down)”, “4 (left)” or “6 (right)” to obtain the correct cross-hatch pattern as above. If necessary, the specified color line can be erased from the screen.

100 button .................. to erase Red line

0 button .................. to erase Green line

RTN (ENT) button .................. to erase Blue line

6. Press “5” button to make the cursor blinking.

7. Press “2”, “8”, “4”, “6” buttons to move the cursor to other point to be adjusted.

8. Repeat steps 4 to 7.

9. Repeat steps 3 to 8 to adjust Red and Blue colors. Converge the selected color line into the Green line.

10. Press “7” button to enter the adjusted states. At this time, picture changes for about 1 second.

11. Press “7” button again to return to the normal picture.

– 3 –

K501

K503

MECHANICAL DISASSEMBLY

K502

20 SCREWS

K601

LABELS

SCREWS

4 SCREWS

A103

A202

A102

A201

A251

A254 (A257) (A258)

11 SCREWS

9 SCREWS

A420

A424

4 SCREWS

A101

K111 K112 K113

6 SCREWS

– 4 –

REPLACEMENT PARTS LIST DIFFERENCES

Location

No.

A101 23465852 Wood Cabinet A102 23519892 Speaker Grille, R (43A10) A102 23527147 Speaker Grille, R (43AX60) A103 23519893 Speaker Grille, L (43A10) A103 23527148 Speaker Grille, L (43AX60) A201 23510392 Bezel (43A10) A201 23540142 Bezel (43AX60) A202 23450265 Control Panel (43A10) A202 23450274 Control Panel (43AX60) A251 23427384 Door (43A10) A251 23427844 Door (43AX60) A254 23445157 Knob, Power (43A10) A254 23445424 Knob, Power (43AX60) A255 23564376 Label A257 23836492 Spring A258 23451976 Push Catch A420 23427355 Back Cover A424 23540128 Back Board A701 23525619 Case (43A10) A701 23525654 Case (43AX60) A703 23935778 Packing, Top A708 23935779 Packing, Bottom C477 24082943 PF, 3600pF, ±3%, 1500V C621 24085960 EL, 4.7?F, ±20%, 50V,

C636 24085960 EL, 4.7?F, ±20%, 50V,

C646 24815223 Chip, 0.022?F, ±10% C647 24815473 Chip, 0.047?F, ±10% C648 24815333 Chip, 0.033?F, ±10% C664 24669479 EL, 4.7?F, ±20%, 50V CV10 24794100 EL, 10?F, ±20%, 16V CV11 24232103 CD, 0.01?F, +80%, _20%, 50V CV12 24232103 CD, 0.01?F, +80%, _20%, 50V CZ01 24797478 EL, 0.47?F, ±20%, 50V

CZ02 24794101 EL, 100?F, ±20%, 16V (43A10) CZ03 24092398 CD, 0.01?F, +80%, _20%, 25V

CZ04 24476103 CD, 0.01?F, ±30%, 16V

CZ05 24476103 CD, 0.01?F, ±30%, 16V

CZ06 24476103 CD, 0.01?F, ±30%, 16V

CZ07 24794101 EL, 100?F, ±20%, 16V (43A10) CZ09 24567103 PF, 0.01?F (43A10) CZ11 24567103 PF, 0.01?F (43A10) CZ12 24474181 Chip, 180pF, ±10% (43A10) CZ13 24476103 CD, 0.01?F, ±30%, 16V

CZ14 24476103 CD, 0.01?F, ±30%, 16V

CZ15 24473560 CD, 56pF (43A10) CZ16 24473470 CD, 47pF (43A10) CZ18 24092398 CD, 0.01?F, +80%, _20%, 25V

CZ19 24794330 EL, 33?F, ±20%, 16V (43A10) CZ23 24092398 CD, 0.01?F, +80%, _20%, 25V

CZ27 24436080 CD, 8pF, ±0.25pF (43A10)

Part No. Description

Non-Polar (43A10)

(43A10)

Location

No.

CZ28 24436151 CD, 150pF, ±0.25pF (43A10) CZ29 24436151 CD, 150pF, ±0.25pF (43A10) CZ30 24436101 CD, 10pF, ±0.25pF (43A10) DB11 23358501 Diode (LED), SCL003URC5F DB14 23118859 Diode, 1SS133 E031Z CRT-D/R Board, PB9454C1

*

E031Z CRT-D/R Board, PB9454F1

*

E032Z CRT-D/G Board, PB9454C2

*

E032Z CRT-D/G Board, PB9454F2

*

E033Z CRT-D/B Board, PB9454C3

*

E033Z CRT-D/B Board, PB9454F3

*

E034Z FRONT-CON Board, PB9454C8

*

E034Z FRONT-CON Board, PB9454F8

*

E035Z FRONT-IN Board, PB9454C9

*

E035Z FRONT-IN Board, PB9454F9

*

E036Z SVM Board, PB9454C6

*

E036Z SVM Board, PB9454F6

*

E037Z 2L-COMB Board, PB9454C7

*

E040Z REM Board, PB9454C10

*

E040Z REM Board, PB9454F10

*

K111 23430512 Delta, 67-A/B Assembly K112 23430512 Delta, 67-A/B Assembly K113 23430512 Delta, 67-A/B Assembly K501 23430786 Lenti Sheet, SCREEN43KK-L K502 23837526 Fresnel Sheet, SCREEN43KH-F K503 23430776 CONT-SCR43DK K601 23430514 Mirror, MIRROR43H (43A10) K601 23430601 Mirror, MIRROR43J (43AX60) K912 23306359 Remote Hand Unit, CT-90037

K912 23306370 Remote Hand Unit, CT-90047

K912A 23101998 Battery, R6KGT SP-2T (43A10) L407 23248196 Coil, Choke, TLN3457AD LV19 23238705 Coil, Peaking, TRF4560AJ LZ01 23289330 Coil, Peaking, TRF4330AF

LZ02 23103880 Coil (Ferrite Bead), TEM2011Y

LZ03 23289339 Coil, Peaking, TRF43R3AF

LZ04 23103880 Coil (Ferrite Bead), TEM2011Y

LZ05 23289100 Coil, Peaking, TRF4100AF

Part No. Description

(43A10)

(43AX60)

(43A10)

(43AX60)

(43A10)

(43AX60)

(43A10)

(43AX60)

(43A10)

(43AX60)

(43A10)

(43AX60)

(43A10)

(43AX60)

(43A10)

(43AX60)

(43A10)

– 5 –

Location

No.

Part No. Description

Location

No.

Part No. Description

LZ06 23289270 Coil, Peaking, TRF4270AF

LZ08 23289159 Coil, Peaking, TRF41R5AF

LZ09 23289339 Coil, Peaking, TRF43R3AF

PB21 23368580 Plug, 6P PV04 23365819 Jack, 1S3P PV59 23367069 Plug, 9P PZ01 23368006 Plug, 8P (43A10) PZ02 23902064 Socket, 8P (43A10) QA01 23000443 IC, MN102L35GFC (43AX60) QB11 23114528 Transistor, 2SC1740S-Q QZ01 23906207 IC, TC90A45P (43A10) QZ02 23114528 Transistor, 2SC1740S-Q

QZ03 23114528 Transistor, 2SC1740S-Q

QZ04 23114528 Transistor, 2SC1740S-Q

R416 24533102 FR, 1k ohm, 2W R435 24322278 MF, 0.27 ohm, 1W (43AX60) R601 24872682 Chip, 6800 ohm, 1/16W R602 24872682 Chip, 6800 ohm, 1/16W R603 24872562 Chip, 5600 ohm, 1/16W R604 24872562 Chip, 5600 ohm, 1/16W R611 24872332 Chip, 3300 ohm, 1/16W R612 24872332 Chip, 3300 ohm, 1/16W R900 24000945 FR, 1.8 ohm, 2W (43AX60) RA81 24366683 CF, 68k ohm RA82 24366223 CF, 22k ohm RA83 24366103 CF, 10k ohm RA86 24366822 CF, 8200 ohm RA87 24366153 CF, 15k ohm RA88 24366273 CF, 27k ohm RB11 24366271 CF, 270 ohm RB14 24366103 CF, 10k ohm RV16 24366750 CF, 75 ohm RV17 24366750 CF, 75 ohm RV18 24366750 CF, 75 ohm RV19 24366332 CF, 3300 ohm RZ01 24366101 CF, 100 ohm (43A10) RZ02 24366221 CF, 220 ohm (43A10) RZ03 24366102 CF, 1k ohm (43A10) RZ04 24366102 CF, 1k ohm (43A10) RZ05 24366821 CF, 820 ohm (43A10) RZ08 24366102 CF, 1k ohm (43A10) RZ09 24366221 CF, 220 ohm (43A10) RZ10 24366101 CF, 100 ohm (43A10) RZ11 24366680 CF, 68 ohm (43A10) SA11 23145226 Switch, Push, 1C1P SA12 23145226 Switch, Push, 1C1P SA13 23145226 Switch, Push, 1C1P SA14 23145226 Switch, Push, 1C1P SA15 23145226 Switch, Push, 1C1P SA16 23145226 Switch, Push, 1C1P SA17 23145226 Switch, Push, 1C1P SA18 23145226 Switch, Push, 1C1P U701 23784783 DIGI-CONV Board, PB9453D

*

U801 DEF/Power Board, PB9451C

*

U801 DEF/Power Board, PB9451D

*

(43A10)

(43AX60)

U901 Signal/CON Board, PB9450E

*

U901 Signal/CON Board, PB9450H

*

UV01 A/V Board, PB9452C (43A10)

*

UV01 A/V Board, PB9452E (43AX60)

*

UY01 23148736 Module, MKMU31 (43AX60)

UZ01 23148718 Module, YMCJ31 (43AX60) * V901R 23003591 Coupling, R43 (43A10) * V901R 23005446 Coupling, R (43AX60) * V902G 23005423 Coupling, G43 (43A10) * V902G 23005447 Coupling, G (43AX60) * V903B 23003593 Coupling, B43 (43A10) * V903B 23005448 Coupling, B (43AX60)

W661 23351131 Speaker, SPK-1390

W662 23351131 Speaker, SPK-1390

Y101 23563954 Owner's Manual, English,

Y101 23563956 Owner's Manual, English,

Y101F 23563955 Owner's Manual, French,

Y101F 23563957 Owner's Manual, French,

Z410 23110842 Focus Pack, TPA6031

(43A10)

(43AX60)

43A10

43AX60

43A10

43AX60

(43AX60)

– 6 –

MEMO

........................................................................................................................................

– 7 –

TOSHIBA CORPORATION

1-1, SHIBAURA 1- CHOME, MINATO-KU, TOKYO 105-8001, JAPA N

FILE NO. 020-200012

SERVICE MANUAL

COLOR TELEVISION

N0NSP Chassis

50A60, 50A50

(TAC0050)

55A60

(TAC0052)

(TAC0051)

,

61A60

(TAC0053)

PUBLISHED IN JAPAN, May., 2000 S

CHAPTER 1 GENERAL ADJUSTMENTS

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

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

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

REPLACEMENT OF THE CRT.................................................................................................................................8

SERVICE MODE ......................................................................................................................................................9

ELECTRICAL ADJUSTMENT ................................................................................................................................11

GENERAL ADJUSTMENTSSPECIFIC INFORMATIONS

CONVERGENCE ADJUSTMENT ..........................................................................................................................13

SCREEN AND MIRROR ALIGNMENTS ................................................................................................................15

CIRCUIT CHECKS .................................................................................................................................................16

CHAPTER 2 SPECIFIC INFORMATIONS

SETTING & ADJUSTING DATA ..............................................................................................................................17

LOCATION OF CONTROLS ...................................................................................................................................18

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

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

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 120V AC power source. The high voltage must not, under any circumstances, exceed (B) kV.

Refer to table-1 for high voltage (A), (B). (See SETTING & ADJUSTING DATA on page 17)

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 any one unf amiliar 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 bef ore 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 fr agments 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; non-metallic control knobs, insulating covers, shields, isolation resistor-capacitor network etc.

4. Before returning the set to the customer, always perform an AC leakage current check on the exposed metallic parts of the cabinet, such as antennas, terminals, screwheads, metal overlays, control shafts etc. to be sure the set is saf e to operate without danger of electrical shock. Plug the A C line cord directly into a 120V AC outlet (do not use a line isolation transformer during this check). Use an AC voltmeter having 5000 ohms per volt or more sensitivity in the following manner:

PRODUCT SAFETY NOTICE

2. This receiver is equipped with a F ail Safe (FS) circuit which prevents the receiver from producing an excessively high voltage ev en if the B+ voltage increases abnormally. Each time the receiver is serviced, the FS circuit must be checked to determine that the circuit is properly functioning, following the FS CIRCUIT CHECK procedure in this manual.

3. 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.

4. 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.

Connect a 1500 ohm 10 watt resistor , paralleled b y a 0.15 µF, AC type capacitor, between a known good earth ground (water pipe, conduit, etc.) and the exposed metallic parts, one at a time. Measure the AC voltage across the combination of 1500 ohm resistor and 0.15 µF capacitor. Reverse the AC plug at the AC outlet and repeat AC voltage measurements for each exposed metallic part. Voltage measured must not exceed 0.3 volts rms. This corresponds to 0.2 milliamp. AC. Any value exceeding this limit constitutes a potential shock hazard and must be corrected immediately.

AC VOLTMETER

0.15µF Place this probe on

Good earth ground such as a water pipe, conduit, etc.

1500 ohm 10 watt

each exposed metallic part.

GENERAL ADJUSTMENTSSPECIFIC INFORMATIONS

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 –

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 ADJUSTMENTSSPECIFIC INFORMATIONS

8 o’clock

4 o’clock

Lens Assembly

R

GB

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

CRT Assembly

CRT Anode Cap Assembly

S.V.M. Coil

CRT DRIVE Board

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

4.

ADJUSTING PROCEDURE IN REPLACING CRT

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

2. PICTURE TILT ADJUSTMENT (page 6.)

3. USER CONVERGENCE CENTER CHECK (See owner's manual.)

4. CENTERING ADJUSTMENT (page 6.)

5. CONVERGENCE ADJUSTMENT (page 13.)

6. WHITE BALANCE ADJUSTMENT (page 12.)

Adjustments are complete.

Anode Cap

GENERAL ADJUSTMENTSSPECIFIC INFORMATIONS

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 RADIA TION PRECA UTION”, “SAFETY PRECAUTION” AND “PRODUCT SAFETY NOTICE” ON PAGE 3 OF THIS MANUAL.

DESCRIPTION OF NECK COMPONENTS TILT ADJUSTMENT

GENERAL ADJUSTMENTSSPECIFIC INFORMATIONS

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.

PICTURE TUBE COMPONENTS ADJUSTMENT

2

1

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

CENTERING ADJUSTMENT

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

2. Select the adjustment mode.

3. Press TV/VIDEO button on the Remote Control to display the white cross-bar.

PREPARATION

Operate the receiver for at least 5 minutes.

R, G, B FOCUS ADJUSTMENT

1. Before adjusting the R, G, B FOCUS, remove the 4 screws of Lens Assembly which is fixed on the CRT Assembly. (See page 4.) Then turn around the Lens Assembly by 180˚ to adjust the fastening screw (Fig. a) and f asten the 4 scre ws to secure Lens Assembly.

2. Select the adjustment mode. (See page 9.)

3. Press “7” button to display the built-in cross-hatch.

4. Press “0” and “R TN” buttons to mak e the picture a single Red color.

100 button ............... to erase Red color

0 button ............... to erase Green color

RTN button ............... to erase Blue color

5. Loosen the fasten screw and adjust Red lense focus to best focusing point of picture center. Then fasten the screw. (See Fig. a.)

4. Perform VCEN adjustment. (See page 11.)

5. Adjust G centering magnet so that the cross-bar pattern center comes to screen center.

6. Perform HEIGHT adjustment . (See page 12.)

7. Perform VERT. LINEARITY adjustment.

8. Perform WIDTH adjustment. (See page 12.)

9. Check whole quality of green line.

10

. Adjust R, B centering magnet so that the cross-bar pat-

tern center comes to screen center.

Fig. a

6. Adjust FOCUS VR “R” of FOCUS PACK to find best focusing point of picture center.

7. Repeat steps 3 to 5 for Green and Blue colors.

– 6 –

LOCATION OF SCREEN AND FOCUS VR’S

RGB

SCREEN VR

GENERAL ADJUSTMENTSSPECIFIC INFORMATIONS

FOCUS VR

– 7 –

Service parts are provided for each R, G and B. The contents of the parts are as follows.

HITACHI

CRT

GENERAL ADJUSTMENTSSPECIFIC INFORMATIONS

REPLACEMENT OF THE CRT

RGB

50A50 23796001 23005397 23796003 50A60 23005114 23005115 ↑ 55A60 23005242 ↑↑ 61A60 23005249 ↑ 23796486

REPLACEMENT OF HIGH VOLTAGE CABLE

ANODE LEAD

RUBBER BOOT

LEAD HOLDER

Fig. a

Z450 TP A5007

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 ne w lead. Do not throw awa y Lead Holder.

NOTE : THE LEAD HOLDER IS ATTACHED TO

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

2. Detaching Lead Holder

RUBBER BOOT

LOCK LEAD HOLDER

Fig. b

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

OLD ANODE LEAD

or

ANODE CAP

– 8 –

1. ENTERING TO SERVICE MODE

1) Press MUTE button once on Remote Control.

MUTE

SERVICE MODE

2) Press MUTE button again to keep pressing.

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

S

(Service mode display)

2. DISPLAYING THE ADJUSTMENT MENU

1) Press MENU button on TV.

Service mode

S

Press

Adjustment 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: TV (ANT)/VIDEO button (on TV)

Selection of the adjustment items : Channel s/t (on TV or Remote) Change of the data value : Volume s/t (on TV or Remote) Adjustment menu mode ON/OFF : MENU button (on TV) Initialization of the memory (QA02) : RECALL+Channel button on TV (s) Initialization of the self diagnostic data: RECALL+Channel button on TV (t)

“RCUT” selection : 1 button “GCUT” selection : 2 button “BCUT” selection : 3 button “SCNT” selection : 4 button “SCOL” selection : 5 button “TNTC” selection : 6 button Convergence adj : 7 button Test audio signal ON/OFF (1kHz) : 8 button Self diagnostic display : 9 button

GENERAL ADJUSTMENTSSPECIFIC INFORMATIONS

Item Data

– 9 –

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 17)

5. ADJUSTING THE DATA

1) Pressing of VOLUME s or t button will cahnge 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

GENERAL ADJUSTMENTSSPECIFIC INFORMATIONS

After replacing QA02, the following initialization is required.

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

2. Press and hold the RECALL 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 “Programming Channel Memory” on the owner's manual.

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

7. 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.

SELF CHECK

1 2 3 4 5

1 Part number of microprocessor (QA01)

2 Operation number of protection circuit (current limiter) . . . . “000” is normal.

3 BUS line check “OK” ................... Normal

4 BUS line ACK (acknowledge) check

5 Sync. signal check Green display..... Normal

NO. 23XXXXXX POWER : 000 BUS LINE : OK BUS CONT : OK BLOCK : MAIN SUB

“SCL-GND” or “NG” ........... SCL-GND short circuit

“SDA-GND” or “NG” ........... SDA-GND short circuit

“SCL-SDA” or “NG” ............ SCL-SDA short circuit

“OK” ..................... Normal

Display of Location Number . . . . NG

(Display example) “QA02 NG”, “H001 NG”, “Q501 NG” etc. Note: The indication of failure place is only one place though failure places are plural. When

repair of a failure place finishes, the next failure place is indicated. (The order of priority of indication is left side.)

Red display ........ NG

MAIN ........ Main sync

SUB .......... Sub sync (when turn on the PIP)

– 10 –

ELECTRICAL ADJUSTMENT

ITEM ADJUSTMENT PROCEDURE

VERTICAL POSITION (VCEN)

SUB-BRIGHTNESS (BRTC)

SUB-COLOR (SCOL) SUB-TINT (TNTC)

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

2. Press the VOLUME s or t button to get the voltage +30 ±10 mV.

3. Measuring method of voltage as follows.

TP-V

(on SIGNAL board)

TP-G C

(on SIGNAL board)

DIGITAL VOLT METER

1. Constrict the picture height until the vertical retrace line appears adjusting the HEIGHT control on the MAIN board.

2. Adjust the CONTRAST to the minimum and BRIGHTNESS to the center.

3. Enter the service mode, then select “BRTC” register.

4. Adjust the data value so the belt of vertical retrace line just disappear.

5. Adjust the HEIGHT control. * Adjust the SUB-BRIGHTENESS after

adjusting the WHITE BALANCE.

Vertical retrace line

1. Receive color-bar signal from color-bar generator.

2. Adjust the BRIGHTNESS and CONTRAST to the center (RESET status).

3. Connect oscilloscope to TP501on the MAIN board.

4. Enter the service mode, then select “SCOL”.

5. Temporarily adjust the data value to achieve about 1V0-p of blue bar.

6. Select “TNTC” register.

Magenta

Blue

7. Adjust the data value to obtain the blue bar to magenta bar ratio of 3:2 as shown.

0

2

8. Select “SCOL” register.

9. Adjust the data value to achieve 1.8V of blue bar on scope.

0-p

10. Check the picture with off-air signal.

3 (1.8V

0-P

GENERAL ADJUSTMENTSSPECIFIC INFORMATIONS

)

SUB-CONTRAST (SCNT)

1. Tune in a color program and adjust the BRIGHTNESS and CONTRAST to normal mode(RESET).

2. Enter the service mode, then select "SCNT" register.

3. Change "SCNT" data to13H.

4. Check the picture contrast.

PICTURE POSITION 1. Receive the pattern signal which shows it's center

on the screen.

2. Adjust the picture position alternately by turning CENTERING MAGNETS for proper picture position.

3. Check the picture with off-air signal.

– 11 –

ITEM ADJUSTMENT PROCEDURE

HEIGHT (HIT)

WIDTH (WID)

GENERAL ADJUSTMENTSSPECIFIC INFORMATIONS

VERTICAL LINEARITY (VLIN)

WHITE BALANCE (RCUT) (GCUT) (BCUT) (RDRV) (BDRV)

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 10 steps.

Note : Check the vertical picture position is correct.

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

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

3. Press the VOLUME s or t button to advance the data by 10 steps. Note : Check the horizontal picture position is correct.

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

2. Receive cross-hatch pattern signal.

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

4. Then readjust the item HIT.

Center

1. Press RESET button on TV or remote hand set.

2. Call up the adjustment mode display, then adjust the data of items RCUT, GCUT and BCUT to “40”.

3. Press TV (ANT)/VIDEO button on TV.

4. Gradually rotate R, G and B SCREEN volume of FOCUS PAC (page 7) clockwise or counterclockwise until the raster appears slightly on the CRT through the each lens, and leave them. (Look into the lens in order to check the raster.)

5. Press TV (ANT)/VIDEO button on TV again.

6. Exit from service mode.

7. Receive white laster pattern signal, and adjust the contrast to the minimum to make white picture to low light.

8. Adjust the data of items RCUT, GCUT and BCUT for low light area.

9. Adjust the contrast to the maximum to make white picture to high light.

10. Adjust the data of items GDRV and BDRV Controls for proper white-balanced picture in high light area.

11. Check the white balance in both low and high light areas. If necessary, perform again steps from 7 to 9.

The data of item GDRV changes red drive actually.

*

– 12 –

CONVERGENCE ADJUSTMENT

Adjust convergence from center to circumference in order.

1. Select the adjustment mode following the steps on page 9.

KEY FUNCTION IN THE CONVERGENCE ADJUSTMENT:

RCUT 40H

Up : 2 button Selet Green color: 3 button Left : 4 button Blinking of cursor ON/OFF: 5 button Right: 6 button Adjust mode ON/OFF: 7 button Down: 8 button Erase Green line: 0 button Erase Red line: 100 button Erase Blue line: CHRTN (ENT) button

Note:

Adjusting procedure in replacing convergence board.

1. User convergence center check. Make sure the best convergence setting is about the center of adjustable range.

2. CENTERING ADJUSTMENT

3. PICTURE POSITION ADJUSTMENT

4. HIT, WID ADJUSTMENT

5. CONVERGENCE ADJUSTMENT

2. Press “7” button to display the built-in cross-hatch pattern.

27.5

Cursor

P = 50.5 x14 (50")

55.8 x14 (55") 62 x14 (61")

27.5

44

P = 84 x12 (50")

92 x12 (55") 103 x12 (61")

The pattern includes three colors (R, G, B). The cursor should be blinking in Red. This means that the Red color is adjustable. Adjustment around cursor can be done.

3. Press “3” button to select Green color to be adjusted.

4. Press “5” button to stop the blinking of cursor.

5. Press “2 (up)”, “8 (down)”, “4 (left)” or “6 (right)” to obtain the correct cross-hatch pattern as above. If necessary, the specified color line can be erased from the screen.

100 button .................. to erase Red line

0 button .................. to erase Green line

RTN (ENT) button .................. to erase Blue line

6. Press “5” button to make the cursor blinking.

7. Press “2”, “8”, “4”, “6” buttons to move the cursor to other point to be adjusted.

8. Repeat steps 4 to 7.

9. Repeat steps 3 to 8 to adjust Red and Blue colors. Converge the selected color line into the Green line.

10. Press “7” button to enter the adjusted states. At this time, picture changes for about 1 second.

11. Press “7” button again to return to the normal picture.

GENERAL ADJUSTMENTSSPECIFIC INFORMATIONS

– 13 –

NOTES

In many cases, color misconv ergence may be corrected by returning HIT and WID data in main deflection side to initial adjusting values. Following cases will surely require readjustment of convergence.

CRT REPLACEMENT

When CRT is replaced, main deflection readjustment and color matching are required. Perform following procedures.

1. Replace two CRT’s of blue and red.

2. Perform horizontal adjustment for blue and red yokes on base of green CRT data. Mount yoke and velocity mod. coil alignment, pushing towards CRT without gap.

3. Adjust alignment of blue and red. (Refer Alignment adjustment for details.)

4. Rotating centering magnet, adjust CRT centers of red and blue to CRT center of green. (Picture position adjustment)

GENERAL ADJUSTMENTSSPECIFIC INFORMATIONS

5. Adjust HIT and WID data of main deflection, and decide data at the most precise screen comparing to green data.

6. Adjust convergence of each screen picture for color matching. Do not move green one at this time.

7. After convergence adjustment of each screen picture finishes, replace green CRT. For green CRT as well, repeat steps 2 to 5 above on bases of red and blue color matching to adjust convergence.

REPLACING CONVERGENCE UNIT

When replacing convergence unit, all picture screens require readjustment basically, but the following method allo ws process be reduced considerably.

1. Replace the memory (Q713) on defective unit with memory on new unit. Mounting the unit on the SET after the above working realizes picture screen before replacement immediately.

2. Mount unit which has combination of old and new memories, on SET and turn it on. Screen shows whole picture looks like straightly shifted towards vertical or horizontal direction.

3. Adjust again centers of green, red and blue with centering magnets.

4. Check each picture screen for slight disparity of color and picture size. If necessary, add some adjustments of main deflection and color matching of convergence.

– 14 –

SCREEN AND MIRROR ALIGNMENTS

ASSEMBLING OF FRONT SCREEN

FRONT

Protect shield

FRONT

Label with part number

(for 50”)

Lenticular sheet

MOUNTING OF FRONT SCREEN

5 screws

Fresnel sheet

GENERAL ADJUSTMENTSSPECIFIC INFORMATIONS

3 screws

Protect shield

3 screws

Fresnel sheet

Stick cotton cloth tape

Label with part number

(for 55”, 61”)

Lenticular sheet

Protect shield

FRONT

Label with part number

Stick contton cloth tape

Fresnel sheet

Label with part number

CAUTION : Do not hold the optical system parts (lens and

mirror) with bare hand to avoid finger-prints on the surface of those parts.

HOW TO CLEAN LENS AND MIRROR

1. Be sure to remove sand dust with an air brush, etc.

2. When it is stained slightly , breathe upon it and wipe awa y with the specified cleaning cloth. For other stains than the above, wipe the stains away with the specified cloth into which a cleaning liquid has been soaked.

Cleaning liquid.................... LENS LUSTER (Manufac-

tured by Edmund Scientific Co.), etc.

4 screws

Please refer to Mechanical Disassembly on page 23.

*

HOW TO CLEAN SCREEN

When cleaning the screen, use a soft cloth so as not to damage the screen.

1. Wipe the screen with a dry cloth to remove moisture on the screen.

Note : Absolutely do not use detergent, water, alcohol,

benzine, thinner, etc. for cleaning in order not to wipe away the black print on the surface.

– 15 –

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 anode of the picture tube.

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

3. High voltage must be measured below (B) kV. Refer to table-1 for high voltage (B).

(See SETTING & ADJUSTING DATA on page 17)

GENERAL ADJUSTMENTSSPECIFIC INFORMATIONS

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

CAUTION:

When the following parts fail, check the High Voltage after replacing.

Location

No.

T461 C447 C406 C407

ANODE VOLTAGE MEASURING METHOD

CAUTION: Take extra precaution when measuring this high

1. Disconnect the FBT anode cable as outlined below . Measure high voltage at the point where the cable enters the FBT.

2. Holding the rubber cover firmly, turn it counterclockwise and check that the lock has been disengaged. (See Fig. b on page 8.)

3. Determine the extent of the rubber cover before disconnecting the cable.

4. Pull straight up the anode cable to disconnect.

5. When reconnecting the cable, proceed in the reverse order . After reconnecting, tug on the cable to check that it is secure.

Name

Flyback Trans. Capacitor Capacitor Capacitor

voltage. High voltages are also present in surrounding circuit boards (CRT DRIVE assembly, DEFLECTION assembly, and POWER SUPPLY assembly).

Name

TFB3078ZD 3900pF, ±3% 1500pF, ±3% 4700pF, ±3%

FS CIRCUIT CHECK

The Fail Safe (FS) circuit check is indispensable for the final check in servicing. Checking should be done following the steps below.

1. Turn the receiver on.

2. T emporarily short TP- (R) and TP- (X) on the DEF/POWER Board with a jumper wire. Raster and sound will disappear.

3. The receiver must remain in this state ev en after removing the jumper wire. This is the evidence that the FS circuit is functioning properly.

4. To obtain a picture again, temporarily turn the receiver off and allow the FS circuit more than 5 seconds to reset. Then turn the receiver on to produce a normal picture.

Troubleshooting Guide for Fail Safe Circuit

Check that the set returns to normal operation when pin 12 of Z801 is grounded with jumper wire.

YES NO

Check the voltage across Capacitor C471 is approximately (

Refer to table –4 for fall safe voltage (

YES

Defective Fail Safe Circuit

C)

volts.

C)

(See SETTING & ADJUSTING DATA on page17)

.

NO

Faulty power circuit or horizontal circuit.

– 16 –

CHAPTER 2 SPECIFIC INFORMATIONS

SETTING & ADJUSTING DATA

SAFETY INSTRUCTIONS

HIGH VOLTAGE AT ZERO BEAM: (A) 31.3 kV MAX HIGH VOLTAGE:

Table-1

SERVICE MODE

43", 50", 55", 61"

(B) 32.4 kV

ADJUSTING ITEMS AND DATA IN THE SERVICE MODE:

Item Name of adjustment

RCUT GCUT BCUT GDRV BDRV CNTX BRTC COLC TNTC SCOL SCNT HPOS VPOS HIT LIN VSC WID VPS

R CUTOFF G CUTOFF B CUTOFF G DRIVE B DRIVE SUB CONT MAX SUB-BRIGHT SUB-COLOR SUB-TINT SUB COLOR SUB-CONTRAST HORIZ. POSITION VERT. POSITION HEIGHT V-LINEARITY V-S CORRECTION PICTURE WIDTH V -SHIFT

Preset Date

40H 40H 40H 40H 40H 7FH 80H 50H 44H 05H 10H 19H 00H 64H 12H 10H 28H 18H

← ← ← ← ← ← ← ← ← ← ← ← ← ← ← ←

23H

←

Item Name of adjustment Preset Date

VCP PARA CNR TRAP HCP VFC PHUE PCNT PCOL RGBB PROF PBOF PGOF STRH STRP VLD VCEN TVOP

V-COMPENSATE E-W PARABOLA (DPC) E-W CORNER TRAPEZIUM H-COMPENSATE V-F CORRECT PIP TINT PIP CONT PIP COLOR RGB BRIGHT PIP R OFFSET PIP B OFFSET PIP YG OFFSET START H START PTN VLD V POSITION TV OPTION

0AH 29H 08H 10H 00H 00H 00H 00H 0FH 54H 00H 00H 00H 67H 8AH 41H 81H 00H

GENERAL ADJUSTMENTSSPECIFIC INFORMATIONS

← ← ← ← ← ← ← ← ← ← ← ← ← ← ← ← ←

←

CIRCUIT CHECKS

T able-2

FBT DETECTION VOLTAGE (C) 24.5V

Table-3

– 17 –

TV front

GENERAL ADJUSTMENTSSPECIFIC INFORMATIONS

LOCATION OF CONTROLS (Representative : 50A60)

S-VIDEO

TV rear

Behind the door

AUDIO

VIDEO L/MONO

Video Audio inputs

MENU

VOL VOL

CH

EXIT DEMOTV/VIDEO

POWER

R

POWER

MENU

AUDIO CENTER

CHANNEL IN

ON OFF

OUT

R

L

S-VIDEO

VIDEO

L/ MONO

AUDIO

R

COLOR

VIDEO-2VIDEO-1

STREAM INPUT

VAR AUDIO

Y

VIDEO

L/

C

B

MONO

AUDIO

RLR

C

R

AUDIO

OUTDVD ININ

CH

VOLUMET S

ANT (75Ω)

ANT-1

OUT

ANT-2

EXIT DEMO

CHANNEL st

TV/VIDEO

– 18 –

Remote Control

LIGHT

TV/CABLE/VCR switch

Set to “TV” to control the TV.

MUTE

Channel Number

C. CAPT

ENTER

FAV t

RESET

PIP CH t

TV

CABLE

VCR

1 4

7

100

C.CAPT

FAV

RESET

STOP SOURCE

REC

RECALL

3

6 9

CH RTN

ENT

PLAY PIP

POWER

TIMER

CH

VOL

MENU

EXIT

LIGHT

MUTE TV/VIDEO

2

5

8 0

ADV/

PIP CH

ENTER

ADV/

PIP CH

TV/VCR REW FF

FAV

RECALL

POWER

TIMER

TV/VIDEO

CHANNEL s/t

VOLUME s/t

CH RTN

MENU

PIP CH

s

FAV s

s/t/T/S

EXIT

PIP functions

(For “TV” and “CABLE” modes)

GENERAL ADJUSTMENTSSPECIFIC INFORMATIONS

STILL LOCATE SWAP

– 19 –

PROGRAMMING CHANNEL MEMORY

The channel memory is the list of TV channel numbers the TV tunes in when you press the CHANNEL s or t button.

First, use the TV/CABLE and CH PROGRAM functions to preset all active channels in your area automatically.

If necessary, arrange the preset channels with the ADD/ERASE functions so that you can tune into only desired channels.

Note: If you utilize both ANT-1 and ANT-2 terminals for some model, perform programming channels for each input source.

TV/CABLE function

1 Press MENU, then press S or T until the SET UP menu

appears.

GENERAL ADJUSTMENTSSPECIFIC INFORMATIONS

2 Press t (or s) until “TV/CABLE” is highlighted.

3 Press : or ; to highlight either “TV” or “CABLE”, whichever

you use.

CH PROGRAM function

1 Select “CH PROGRAM” following steps 1 and 2 above.

2 Press : or ; to start channel programming.

The TV will automatically cycle through all the TV or CABLE channels selected by the TV/CABLE function, and store active channels in the channel memory.

3 When channel programming is complete, you will see the

message to the right appears.

4 Press CHANNEL s or t to make sure the channel

programming has been done properly.

ADD/ERASE function

After performing the CH PROGRAM function, you can add or erase specific channels.

1 Select the channel you want to erase using the CHANNEL

s or t button, or select the channel you want to add using the Channel Number buttons.

2 Press MENU, then press S or T until the SET UP menu

appears.

3 Press t (or s) until “ADD/ERASE” is highlighted.

4 Press S or T :

To erase the channel press the button until “ERASE” is

highlighted.

To add the channel press the button until “ADD” is highlighted.

5 Repeat steps 1 to 4 for other channels.

You have now completed the channel programming.

Note: The CHANNEL t/s buttons on the TV function as the

t/s buttons while a menu is on the screen.

* Please refer to owner's manual in detail.

– 20 –

CIRCUIT BLOCK DIAGRAM

– 21 –

– 22 –

MECHANICAL DISASSEMBLY

K501

(K511)

4 screws

A201

K502

A424

A160

3 screws

5 screws

A401

3 screws

(A150)

(A110)

1 screw

A265

A266

A267

A201

1 Speaker Grille Removal 2 Control Panel Removal

A101

A221

(A322)

A213

A224

A202

A103

A126 A127

A268

3 Front Mask Removal

4 Mask Removal

A102

5 Shield Plate, Lens Removal 6 Mirror Removal

4 screws

K111 K112 K113

4 screws

A269

5 screws

K601

– 23 –

A152

7 Back Board Removal

8 Light Box Removal

– 24 –

Toshiba 43A10, 43AX60, 50A50, 50A60, 55A60 Schematic

SETTING & ADJUSTING DATA DIFFERENCES

CONVERGENCE ADJUSTMENT

MECHANICAL DISASSEMBLY

REPLACEMENT PARTS LIST DIFFERENCES

TABLE OF CONTENTS

CHAPTER 1 GENERAL ADJUSTMENTS

SAFETY INSTRUCTIONS

CRT ASSEMBLY REPLACEMENT AND MOUNTING

PICTURE TUBE COMPONENTS ADJUSTMENT

REPLACEMENT OF THE CRT

SERVICE MODE

ELECTRICAL ADJUSTMENT

CONVERGENCE ADJUSTMENT

SCREEN AND MIRROR ALIGNMENTS

CIRCUIT CHECKS

CHAPTER 2 SPECIFIC INFORMATIONS

SETTING & ADJUSTING DATA

PROGRAMMING CHANNEL MEMORY

CIRCUIT BLOCK DIAGRAM

MECHANICAL DISASSEMBLY