Toshiba TW40F80 Bedienungsanleitung

QUICK REFERENCE GUIDE

N5SS CHASSIS

TW40F80

PROJECTION TELEVISION

NATIONAL SERVICE DIVISION

TRAINING DEPARTMENT

1420-B TOSHIBA DRIVE

LEBANON, TENNESSEE 37087

PHONE: (615) 449-2360

FAX: (615) 444-7520

www.toshiba.com/tacp

NTDPJTV06

REV 1297

Contents

DISASSEMBLY............................................................3

1. Front....................................................................................................................................................... 3

2. Rear........................................................................................................................................................ 5

CRT ADJUSTMENTS ................................................6

1. Template Instructions........................................................................................................................... 6

2. Optical and Electrical Focus................................................................................................................ 6

3. Mechanical Tilt ................................................................................................................................... 7

4. User Convergence ................................................................................................................................ 8

5. Magnetic Centering ............................................................................................................................. 8

6. Electrical Centering............................................................................................................................. 8

7. Green Geometry................................................................................................................................... 9

8. Red Convergence ............................................................................................................................... 10

9. Blue Convergence .............................................................................................................................. 11

10. White Balance ................................................................................................................................... 11

11. WID, HIT, & VLIN.......................................................................................................................... 12

BLOCK DIAGRAMS.................................................13

1. System .................................................................................................................................................. 13

2. Power Supply ...................................................................................................................................... 14

3. Video .................................................................................................................................................... 15

4. Audio.................................................................................................................................................... 16

5. Deflection............................................................................................................................................. 17

TROUBLESHOOTING FLOW CHARTS ..............18

1. Shut down............................................................................................................................................ 18

DISASSEMBLY

1. Front

1.Retract the two screws located at the

bottom of the speaker grill. Then, remove the

speaker grill from the cabinet.

2.Retract the two screws located on the

front service panel. Remove the panel by

lifting up and pulling the bottom out and away

from the cabinet.

3.Retract the two screws located near

the bottom of the x-ray shield. Loosen the top

two screws. Slide the shield to the right and

downward, then pull it away from the cabinet.

4.Retract the four screws located at the

bottom of the Front-LED panel. This panel will

still be attached to the cabinet via the Front-

LED board’s wiring harness.

5.Retract the two screws located near

the Front-LED P.C. board. Remove the Front-

LED P.C. board from the panel and pull the

panel away from the cabinet.

6.Retract the four screws located at the

bottom of the bezel. Pull the bezel away from

the cabinet while lowering the top of the bezel

to the floor. The bezel will still be attached to

the cabinet via the Front-control board’s wire

harness.

7.Retract the two screws located near

the Front control PC board. Remove the PC

board from the bezel. Pull the bezel away

from the cabinet.

8.Pull the two brass clips up and away

from the screen. Then, remove the lenticular

and fresnel screens by lifting them up and

away from the cabinet.

This completes the front disassemby

procedure.

2. Rear

1.Remove seven (7) wood screws and

four (4) brass screws on the back panel and

remove the back panel.

2.Remove the five (5) screws that secure

the PC board chassis to the cabinet.

3.Release the wires from their harness

clips. Remove the brass screw securing the

grey plastic tray to the inside of the cabinet

and remove the tray.

4.Partially slide both PC board chassis

out from the cabinet. Release the wires from

thier harness clips located at the bottom front

of the cabinet. Slide both chassis to approxi-

mately 50% of the way out from the cabinet.

6.Stand both chassis frames up on end

with the solder sides of the PC boards facing

outward. The TW40F80 is now in the proper

service position.

5.Lift the corner of each chassis frame

while sliding both chassis completely out of

the cabinet.

CRT ADJUSTMENTS

1. Template Instructions

CAUTION: Use only water and a

damp cloth to clean an overlay. Any

other cleaning substance may cause

damage.

Both the TW40F80 and TW56F80 are

converged at four separate screens. In order

to reduce the number of times a template

must be installed and centered, two screens

have been printed on each template.

On PSOL4001, the SOLID lines are for

the FULL crosshatch and the DASHED lines

are for the WIDE#1 crosshatch.

On PSOL4002, the SOLID lines are for

the WIDE#2 crosshatch and the DASHED

lines are for the WIDE#3 crosshatch.

The 56” templates are manufactured the

same way. PSOL5601 contains the FULL and

WIDE#1 crosshatch patterns. PSOL5602

contains the WIDE#2 and WIDE#3 crosshatch

patterns.

The templates for the TW40F80 are

centered by aligning the four corner brackets

(located on each template) with the inner

border that outlines the screen’s viewing

area.

For the TW56F80, temporarily install the

template on the screen. Locate the cen-

ter of the screen by stretching two pieces of

string diagonally across it, corner to corner.

Align the template’s center crosshairs with the

center point of the screen.

Secure each template to the bezel with

low tack tape. To reduce parallax error, place

the template as flat against the screen as

possible.

2. Optical and Electrical Focus

Always allow the set to warm up for at

least 15 minutes before making CRT

adjustments.

The TW40F80 and TW56F80 should be in the

WIDE 1 picture size for these adjustments.

1. Follow the appropriate disassembly

instructions to gain access to the CRTs.

2. If the wing nuts on the lenses are

pointed toward the screen, reverse the lenses

on each tube so the wing nuts are facing the

back of the set. Leave the lenses in this

position after servicing. Put the screen as-

sembly back on.

3. Enter the service mode by pressing

MUTE on the remote control. Press and hold

the MUTE key a second time, while pressing

the MENU key on the set’s front control panel.

An “S” appears in the upper right corner of the

screen, indicating the set is in the Service

Mode. Press the MENU key again to enter

the service adjustment mode, and “RCUT”

appears in the upper left corner of the screen.

Press the 7 key to display the convergence

cross hatch pattern.

8.Repeat the optical focus, then tighten

the wing nut.

9.Repeat the electrical focus.

10. Push the 100 key to turn on the red

tube, and the 0 key to turn off the green tube.

11. Adjust the red optical and electrical

focus.

12. Push the RTN key to turn on the blue

tube, and the 100 key to turn off the red tube.

13. Adjust the blue optical and electrical

focus. However, defocus the blue slightly with

the electrical focus control to maintain uniform

brightness.

14. Select the FULL picture size with

the PIC SIZE key on the TW40F80 and

TW56F80.

15. Push the 7 key two times to exit the

convergence mode and call up the built in test

patterns. There should be no connection to

the Video 1 Input.

3. Mechanical Tilt

Make sure there is no connection to

the VIDEO 1 input.

1.With the set still in service adjust-

ment mode, push the TV / VIDEO key until the

white cross bar on black background test

pattern is displayed. Check each CRT’s tilt. If

a CRT’s cross bar pattern is tilted, loosen the

appropriate yoke with a non magnetic screw

driver and rotate the yoke until the cross bar

pattern is aligned vertically and horizontally.

On the TP50F50/51, the notches in the

screen bezel can be used as a guide.

For the TW40F80 and TW56F80, place

the FULL / WIDE 1 template on the screen

and use the FULL (solid lines) center cross

hairs as a guide.

2.Turn the power off to exit the service

mode.

4.Select the WIDE 1 picture size with the

PIC SIZE key on the TW40F80 and TW56F80.

5.Push the 100 key to turn off the red

tube, and the RTN key to turn off the blue

tube.

6.Move around to the rear of the set.

Loosen the wing nut on the green lens. Ro-

tate the lens while looking up at the back of

the screen at the reflected image. Adjust the

lens for the best focus in the center area of

the screen. It helps to have the room dark. If

the room is not dark enough, place the

speaker grill, or a similar dark object, in front

of the screen.

7.Move around to the front of the set and

adjust the electrical focus for best focus in the

center of the screen.

4. User Convergence

1.Turn the power on.

2. Put the TW40F80 and TW56F80 in the

FULL picture size.

3.Enter the customer convergence

screen:

a) TW40F80 andTW56F80: Press the

menu key. Using the left or right arrow keys,

select the PICTURE icon. Use the down

arrow key to select CONVERGENCE. Use

the right arrow key to start the customer

convergence screen. The ENTER key selects

RED or BLUE. The arrow keys move the

selected color up, down, left, and right.

b) TP50F50/51: Press the setup key until

CONVERGENCE is highlighted. Press the +

or - key to start the customer convergence

screen. The + and - keys then select RED or

BLUE to converge. The 2 and 8 keys move

the selected color up and down, the 4 and 6

keys move the selected color left and right.

4.Move the red vertical cross bar as far

as it will go to the right. Note the location.

Move the red vertical cross bar as far as it will

go to the left. Note the location. Set the red

vertical cross bar to the center of the two

extremes.

5. Move the red horizontal cross bar as

far as it will go towards the top of the screen.

Note the location. Move the red horizontal

cross bar as far as it will go toward the bottom

of the screen. Note the location. Set the red

horizontal cross bar to the center of the two

extremes.

6. Switch to the blue cross bars and

repeat the entire process.

7.Exit the customer convergence screen.

5. Magnetic Centering

1.Enter the service adjustment mode.

Use the TV/VIDEO key to select the white

cross bar on black background test pattern.

2.Rotate the centering rings on the green

CRT to center the green cross bar. If the

rings won’t turn, remove the locking glue with

a small knife. On the TP50F50/51, use the

center cross hairs of the convergence tem-

plate or the center notches in sides of the

screen bezel.

There are no center notches on the

screen bezels of the TW40F80 or TW56F80.

Use the FULL center cross hairs of the FULL /

WIDE 1 convergence template. The red and

blue CRT centering rings may be misadjusted

to make it easier to center the green cross

bars.

3.Center the red and blue cross bars

using the green cross bars as a guide.

4.Lock the centering rings with a pliable

adhesive.

5.Exit the service adjustment mode.

6. Re-install the CRT x-ray shield.

6. Electrical Centering

1.Disconnect any input at the Video 1

input.

2.Select the FULL picture size on the

TW40F80 and TW56F80. Put the set in the

service adjustment mode.

3.Push the TV/VIDEO key on the remote

until the white cross bar pattern on a black

background is displayed.

4.Check the centering of the cross bar

pattern with the centering notches in the bezel

on the TP50F50/51. For the TW40F80 and

TW56F80, use two pieces of string stretched

diagonally, corner to corner, to find the center

of the screen, or use the FULL center cross

hairs of the FULL / WIDE 1 convergence

template.

5.If the horizontal position is off, push the

channel up or down key until the “HPOS”

center the pattern.

6.If the vertical position is off, push the

channel up or down key until the”VPOS”

center the pattern.

7.Push the TV/VIDEO key until no test

pattern is displayed. Turn the power off.

7. Green Geometry

1. Put the set in the service adjustment

mode and bring up the convergence cross

hatch pattern. Select the FULL picture size

for the TW40F80 and TW56F80.

2.Push the 100 key to turn off the red

tube, and RTN to turn off the blue tube.

3. Place the convergence template on the

screen and align the center cross hairs with

the center of the screen. Start with the FULL /

WIDE 1 template on the TW40F80 and

TW56F80. The solid line crosshatch is for

FULL. The dashed line crosshatch is for

WIDE 1.

4.Use low tack masking tape to attach

the template to the bezel. Get the template as

flat as possible against the screen to reduce

parallax errors.

NOTE: If the microcomputer memory IC

(QA02) has been reset or replaced, or the

crosshatch pattern is not reasonably close to

the template pattern, make the adjustments in

section 11 (WID, HIT, & VLIN Adjustments).

Then proceed with step 5.

5.Push the 3 key on the remote until the

blinking cursor in the upper left corner of the

screen turns green.

6.Move the blinking cursor to the right

with the 6 key, then down with the 8 key until

it’s one line to the right of center. The 4 key

moves the cursor to the left, and the 2 key

moves it up.

7.Push the 5 key to lock the cursor in

place.

8.Use the 2, 6, 8, and 4 keys to align the

lines of the cross hatch with those on the

template.

9.Push the 5 key to unlock the cursor.

10. Move the cursor to another location

and repeat steps 7 and 8.

There are two common methods for

accomplishing digital convergence:

A. The first method begins in the center

of the screen and moves in a counter-clock-

wise spiral outward to the various adjustment

locations on the crosshatch pattern.

At each adjustment location the cross-

hatch line is pulled vertically and horizontally

to align with the template.

B. The second method starts at the

center of the screen and adjusts all vertical

lines working outward to the right side.

Then, starting back at the center of the

screen, adjusts all vertical lines working

outward to the left side.

The process is then repeated for the

horizontal lines.

From the center of the screen, adjust all

horizontal lines working upward to the top.

Go back to the center and adjust all

horizontal lines working downward to the

bottom.

Usually, either process will need to be

repeated in order to fine tune the adjust-

ments. Choose the method that is most

comfortable for you.

After completing the Green Geometry for

the FULL picture size, press the PIC SIZE key

to change the picture size to WIDE 1. The

crosshatch pattern does a one second distor-

tion, indicating the FULL convergence set-

tings have been saved.

NOTE: This completes the green geometry for

the TP50F50/51, however, the TW40F80

and TW56F80 require green geometry

adjustments for 3 additional picture

sizes:

11. Press the PIC SIZE key to change the

picture size to WIDE 1. The cross hatch

pattern does a 1 second distortion, indicating

the FULL convergence settings have been

saved.

NOTE: If the WIDE 1 cross hatch pattern

is not reasonably close to the WIDE 1 tem-

plate, you may need to make the adjustments

in section 11 for WIDE 1 only. WIDE 1 has its

own WID, HIT, and VLIN registers.

12. Repeat steps 5 through 10 for the

WIDE 1 picture size.

13. Press the PIC SIZE key to save the

WIDE 1 settings and change to the WIDE 2

picture size.

14. Remove the FULL / WIDE 1 overlay.

Put the WIDE 2 / WIDE 3 overlay in place

and center it on the screen. The solid line

crosshatch is for WIDE 2. The dashed line

crosshatch is for WIDE 3.

15. Repeat steps 5 through 10 for the

WIDE 2 picture size.

16. Press the PIC SIZE key to save the

WIDE 2 settings and change to the WIDE 3

picture size.

17. Repeat steps 5 through 10 for the

WIDE 3 picture size.

NOTE: The Red and Blue must be

converged to the green. The Red and Blue

convergence steps must be repeated for all

picture sizes on the TW40F80 and the

TW56F80.

8. Red Convergence

1.On the TW40F80 and TW56F80,

change the Picture Size to FULL.

2.Remove the template and press the

100 key to turn on the red tube.

3.Press the 3 key until the red cursor

appears.

4.Align the red cross hatch pattern to the

green cross hatch pattern, using the same

procedure used to align the green cross hatch

pattern to the template.

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