Panasonic PT-LB80NTU, PT-LB80NTE, PT-LB80NTEA, PT-LB80U, PT-LB80E Service Manual

...

PT-LB80NTU PT-LB80NTE PT-LB80NTEA PT-LB80U PT-LB80E PT-LB80EA PT-LB75NTU

ORDER NO. VED0804386C0

D10

LCD Projector

PT-LB75NTE PT-LB75NTEA PT-LB75U PT-LB75E PT-LB75EA

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

CONTENTS

Page Page

1 Safety Precautions 5

1.1. General Guidelines

1.2. Leakage Current Check

5 5

1.3. UV Precaution and UHM Lamp Precautions

2 Ext Option

2.1. Procedure to enter EXT OPTION

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

2.2. EXT OPTION Menu and Functions 6

2.3. Canceling EXT OPTION

3 Self-Check Mode

3.1. Procedure to enter the self-check mode

3.2. Self Check Display and Contents

3.3. Canceling the self-check mode

4 Test Pattern

4.1. Procedure to display test patterns

4.2. Canceling the test pattern display

5 Flicker Adjustment Mode

5.1. Procedure to enter the adjustment mode

5.2. Adjustment Display and Contents

5.3. Canceling the flicker adjustment mode

6 Using the SERIAL Connector

6.1. Connection

6.2. Pin Layout and Signal Names for SERIAL Connector

6.3. Communication Settings

6.4. Control commands

6.5. Communication Cable Specifications

7 Disassembly Instructions

7.1. Printed Circuit Board and Main Parts Location

7.2. Removal of Upper Case

7.3. Removal of A-P.C.Board

7.4. Removal of K1-P.C.Board and K2-P.C.Board Block

7.5. Removal of S-Module

7.6. Removal of WL-P.C.Board (Only for PTLB80NT**/LB75NT**)

7.7. Removal of Z-P.C.Board

7.8. Removal of B/Q-Module

7.9. Removal of P-Module

7.10. Removal of Lamp Unit

7.11. Removal of Analysis Block and Projection Lens

7.12. Removal of LCD Block

7.13. Replacement of LCD Panel (B)

7.14. Replacement of Incidence Polarizer (G)

7.15. Replacement of Incidence Polarizer (R and B)

7.16. Replacement of Projection Polarizer

7.17. Replacement of PBS Array (Analysis Block)

8 Measurement and Adjustments

8 9

10 10

10 10 10

11 11 11 12 12

13 14 14 14 15

8.1. Cautions for Adjustment

8.2. Setting Before Adjustment

8.3. Convergence Adjustment

8.4. Software for Adjustment

8.5. Flicker Adjustment

8.6. Input Level Adjustment

8.7. Model Information Setup

9 Troubleshooting 10 Int erc onnection Bloc k Diagram

10.1. Interconnection Block Diagram (1/2)

10.2. Interconnection Block Diagram (2/2)

11 Block Diagram

11.1. Power Supply

11.2. Signal Processing (1/3)

11.3. Signal Processing (2/3)

11.4. Signal Processing (3/3)

12 Schematic Diagram

12.1. A-P.C.Board (1/6)

12.2. A-P.C.Board (2/6)

12.3. A-P.C.Board (3/6)

12.4. A-P.C.Board (4/6)

12.5. A-P.C.Board (5/6)

12.6. A-P.C.Board (6/6)

12.7. WL-P.C.Board (1/2) 15 15 15 16 17 17 17 18 18 19 19

12.8. WL-P.C.Board (2/2)

12.9. S-Module

12.10. K-P.C.Board

12.11. B-Module (1/2)

12.12. B-Module (2/2)

13 C irc uit Boards

13.1. A-P.C.Board

13.2. S-Module, WL-P.C.Board

14 Te rm inal guide of ICs and transist ors 15 Ex ploded Views 16 Replacement Parts List

21 21 21 22 27 27 27

29 41

41 42

43 44 45 46

48 49 50 51 52 53 54 55 56 57 58 59

61 62

63 64 68

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

1 Safety Precautions

1.1. General Guidelines

· For continued safety, no modification of any circuit must be

attempted.

· Unplug the power cord from the power outlet before

disassembling this projector.

· Use correctly the supplied power cord and must ground it.

· It is advisable to use an isolation transformer in the AC

power line before the service.

· Be careful not to touch the rotation part (cooling fan, etc.) of

this projector when you service with the upper case removed and the power supply turned ON.

· Observe the original lead dress during the service. If a short

circuit is found, replace all the parts overheated or damaged by the short circuit.

· After the service, all the protective devices such as

insulation barriers, insulation papers, shields, and isolation R-C combinations must be properly installed.

· After the service, check the leakage current to prevent the

customer from getting an electric shock.

1.2. Leakage Current Check

1. Prepare the measuring circuit as shown in Fig.1. Be sure to use a voltmeter having the performance

described in Table 1.

Fig. 2

2. Assemble the circuit as shown in Fig. 2. Plug the power cord in a power outlet.

3. Connect M1 to T1 according to Fig. 2 and measure the voltage.

4. Change the connection of M1 from T1 to T2 and measure the voltage again.

5. The voltmeter must read 0.375 V or lower in both of steps 3 and 4. This means that the current must be 0.75 mA or less.

6. If the reading is out of the above standard, the projector must be repaired and rechecked before returning to the customer because of a possibility of an electric shock.

1.3. UV Precaution and UHM Lamp

Precautions

· Be sure to unplug the power cord from the power outlet when replacing the lamp.

· Because the lamp reaches a very high temperature during its operation, wait until it cools completely when replacing the Lamp Unit.

· The lamp emits small amounts of UV-radiation, avoid directeye contact with the light.

· The lamp unit has high internal pressure. If improperly handled, explosion might result.

· Because the high pressure lamp involves a risk of failure, never touch the lamp wire lead during the service. (See Fig.

Fig. 1

Table 1

Fig.3

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

2 Ext Option

This projector has EXT OPTION in addition to standard on-screen menus.

· There are SELF CHECK and TEST PATTERN for service, etc.

2.1. Procedure to enter EXT OPTION

1. Press "MENU" button on the main unit or remote control unit to display "MENU" screen, then select "OPTION" and press "ENTER" button.

2. Select "INPUT GUIDE" on "OPTION" menu and press "ENTER" button 3 seconds or longer. MENU → OPTION → INPUT GUIDE

2.2. EXT OPTION Menu and Functions

· FREEZE MESSAGE Switching ON/OFF "FREEZE" on-screen display

· FAN FULL MODE Setting the cooling fan motor rotation speed

−

− Switching ON "FAN FULL MODE", the rotation level of the fan becomes high-speed rotation (fixed). Moreover, when "FAN

− −

FULL MODE" is ON, changing "ALTITUDE" in OPTION becomes impossible (setting "FAN FULL MODE" is given priority more than "ALTITUDE").

· AUTOSETUP Setting AUTO SETUP mode

−

− STANDARD: To set the normal mode (the dot clock is adjusted strictly))

− −

−

− SPECIAL: To set the special mode (the dot clock is adjusted roughly)

− −

Note:

−

− Do not change the initial setting (STANDARD).

− −

· SYNC

Setting SYNC processing mode

−

− STANDARD: To set the normal mode

− −

−

− SPECIAL: To set the special mode (noise reduction mode)

− −

Note:

−

− Do not change the setting when it is possible to receive normally.

− −

Change the setting only when the image is not displayed normally because of the sync signal noise of connected equipment.

· VGA60/480p

−

− AUTO: Switching RGB of VGA60 and 480p automatically

− −

−

− VGA60: Inputting signals in 59.9Hz / VGA480

− −

−

− 480p: Inputting signals in RGB of 480p

− −

· HPLL

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

When non-standard signal of VIDEO/S-VIDEO is inputted (VCR, VHD, etc.), horizontal synchronization might be disordered according to connected equipment. In this case, set HPLL to OFF.

· EMULATE

Switching the operation of RS-232C command to communicate with models other than LB80 series.

−

− DEFAULT: LB80 series standard, F100 series standard, D3500

− −

−

− TYPE1: L730/L780/L735/LB/LC series

− −

−

− TYPE2: L785

− −

−

− OTHER: Models other than the above-mentioned (Consult your dealer or Authorized Service Center for details.)

− −

· AUDIO IN STANDBY

Setting the audio output when STANDBY

−

− OFF: Does not output it.

− −

−

− ON: Outputs it.

− −

Note:

−

− When setting it to "ON", audio source of the input channel when the power supply is turned off (switched to STANDBY)

− −

is outputted. Do with the remote control unit, control panel or RS-232C communication when you switch the channel. The audio volume can be adjusted by the remote control unit or RS-232C communication.

· OVER SCAN

Setting the rate of over scanning

−

− 1: Approx. 6%

− −

−

− 2: Approx. 4%

− −

Note:

−

− Normally, set it to "1".

− −

· LAST POWER MEMORY

−

− ON: Ordinary mode [If unplugging the power code during the projecting mode (lamp ON), the projector will start from the

− −

projecting mode when the power code will be connected next time.]

−

− OFF: Always becomes STANDBY mode [Even if unplugging the power code during the projecting mode (lamp ON), the

− −

projector will start from the standby mode when the power code will be connected next time.]

Note:

It is effective only when the setting of "DIRECT POWER ON" that is the submenu of "OPTION" menu is OFF.

· CLOSED CAPTION

−

− STANDARD: To set the normal mode

− −

−

− SPECIAL: To set the special mode

− −

(For DVD and/or VCR with time-based corrector, jitter of the character is improved.)

Note:

−

− Do not change the setting when it is possible to receive normally.

− −

Normally, set it to "STANDARD".

· MENU LOCK

Switching ON/OFF "MENU LOCK" function

−

− OFF: Accessible to MENU

− −

−

− ON: The access to MENU is restricted (The password is required).

− −

−

− When MENU LOCK is set to "ON", the password input screen is displayed when it accesses the menu, and the

− −

adjustment in the menu item is locked.

· MENU LOCK PASSWORD

Setting the password into MENU LOCK

−

− The default password is "AAAA".

− −

When you want to reset the password into the default password, do the following operation.

1. Press on the remote control unit the AUTO SETUP button, or on the main unit the INPUT SELECT button and the button at the same time for 2 seconds or more.

2. Press

· ANGLE RESET

button for 2 seconds or more.

Resetting "Real-time Keystone" reference level

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

Note:

−

− Normally, do not select. (Angle reset data will be rewritten.)

− −

· SELF CHECK

To enter the self-check mode

· TEST PATTERN

To display test patterns

· FLICKER ADJUST

To enter the flicker adjustment mode

2.3. Canceling EXT OPTION

Press "MENU" button on the main unit or remote control unit.

3 Self-Check Mode

This mode is used to narrow down the location of the failure.

3.1. Procedure to enter the self-check mode

Select "SELF CHECK" on "EXT OPTION" menu and press "ENTER" button on the main unit or remote control unit.

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

3.2. Self Check Display and Contents

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

3.3. Canceling the self-check mode

Press "MENU" button on the main unit or remote control unit.

4 Test Pattern

This projector displays seven kinds of test patterns [Horizontal lines, Vertical lines, Dots, Crosshatch, White cross, Black cross and White (No pattern)] in the four colors (White, Red, Green and Blue).

Note:

· Because the above patterns can be displayed by each color without test equipment such as PC or SG, use it for simplified

adjustments by your eyes and so on.

4.1. Procedure to display test patterns

Select "TEST PATTERN" on "EXT OPTION" menu and press "ENTER" button on the main unit or remote control unit.

Note:

· On the test pattern screen, pressing the up-arrow "

the left-arrow "

" or right-arrow " " button the color selection (White / Red / Green / Blue).

4.2. Canceling the test pattern display

Press "MENU" button on the main unit or remote control unit.

" or down-arrow " " button allows the test pattern selection and

5 Flicker Adjustment Mode

If replacing the optical parts (LCD Panel / LCD block) of this projector and/or A-P.C.Board (assembly), enter the flicker adjustment mode and minimize the flicker.

5.1. Procedure to enter the adjustment mode

Select "FLICKER ADJUST" on "EXT OPTION" menu and press "ENTER" button on the main unit or remote control unit.

Note:

"DESK setting (blue)" is displayed when entering the adjustment mode.

5.2. Adjustment Display and Contents

· Setting value is increased and decreased with the right-arrow " " and left-arrow " " buttons.

": Decrease, " ": Increase

−

− Adjust the setting value to minimize the flicker on the screen.

− −

−

− Execute the adjustment by 6 patterns below.

− −

· The pattern (adjustment display) is switched with the up-arrow "

": Forward direction, " ": Reverse direction

−

− There are 6 patterns of "DESK setting (blue)", "DESK setting (red)", "DESK setting (green)", "CEILING setting (blue)",

− −

"CEILING setting (red)" and "CEILING setting (green)".

−

− The setting value is saved into this projector when the pattern is switched.

− −

" and down-arrow " " buttons.

5.3. Canceling the flicker adjustment mode

Press "MENU" button on the main unit or remote control unit.

Note:

When "MENU" button is pressed, the setting value at that time is saved into this projector and the adjustment mode is canceled.

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

6 Using the SERIAL Connector

The serial connector which is on the back connector panel of the projector conforms to RS-232C standard. This projector can be controlled by a PC which is connected as shown in "6.1. Connection".

For controlling this projector by a PC, requires communication software on the market, and inputs control commands according to Communication Settings and Control Commands below.

6.1. Connection

Note:

Use a proper communication cable which is suitable for the PC to connect SERIAL connector and the PC.

6.2. Pin Layout and Signal Names for SERIAL Connector

Pin No Signal Name Contents

1 --- NC 2 TXD Transmit data 3 RXD Receive data 4 --- NC 5 GND Ground 6 DSR 7 CTS Connected internally 8 RTS 9 --- NC

6.3. Communication Settings

Signal Level Contents Description

Sync. method Asynchronous Synchronizes every 1 character (8 bits)

Baud rate Conforms to 9 600 bps Data transfer speed

Parity RS-232C None Error detection method

Character length standard 8bits Number of bit composing 1 character

Stop bit 1bit Uses stop bit when asynchronous method X parameter Not used S parameter Not used

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

6.4. Control commands

6.5. Communication Cable Specifications

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

7 Disassembly Instructions

Warning:

· Be sure to unplug the power cord from the power outlet before disassembling this projector.

Caution:

· While turning over a printed circuit board, be sure to put a insulating material under it to prevent a short circuit.

· Printed circuit boards and wires must not be pulled forcibly, but be handled carefully.

· Connectors also must be handled carefully.

· When reassembling, replace used adhesive tape with new one (Do not re-use used tape).

· After repairing this projector, be sure to put back the wires and connectors to the original condition.

· Service or repair the product according to service information on the service manual, etc. so that a fire, injury or electric

shock caused by an improper repair may not occur.

1. Do not modify equipments, components and materials when attempting to service or repair.

2. Do not repair nor connect wires even in case of a part of the disconnection when the wiring unit is supplied as a replacement parts, replace the wiring unit (complete).

3. For a fasten terminal (push-in type terminal), pull out or insert straightly without twisting it.

4. When the fuse has blown, do not turn on the power supply replacing only the fuse because the secondary disaster of fumes, fire or other hazards is expected. Turn on the power supply after doing the confirmation and measures of defective causes (structure and circuit, etc.).

5. After the service or the repair is completed, confirm the operation of the product is normal.

6. Do handling and safekeeping carefully because the user setup information remains in the projector.

7.1. Printed Circuit Board and Main Parts Location

Electrical Parts

Optical Parts

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

7.2. Removal of Upper Case

1. Turn the projector upside down.

2. Unscrew the 7 screws.

6. Unscrew the 12 screws and remove the connector metal fittings.

Note:

· For PT-LB80NT**/LB75NT**, WL-P.C.Board is

3. Return the projector to the normal position.

4. Remove the upper case.

attached on the connector metal fittings. Be careful with handling.

7.3. Removal of A-P.C.Board

1. Remove the upper case according to the section 7.2. "Removal of Upper Case".

2. Loosen the 2 screws until they idle, remove the lamp unit cover.

Note:

· For the interlock switch damage prevention when

reassembling, must remove the lamp unit cover.

3. Unscrew the 2 screws and remove the connector cover.

4. Unscrew the 3 screws and remove the Lamp house.

5. Unscrew the 2 screws and remove the A-P.C.Board block (with WL-P.C.Board).

7.4. Removal of K1-P.C.Board and K2-P.C.Board Block

1. Remove the A-P.C.Board block according to the steps 1

through 5 in the section 7.3. "Removal of A-P.C.Board".

2. Loosen the 3 screws until they idle, remove the lamp unit

with the handle.

3. Unscrew the 3 screws and remove the block of Analysis

Block, LCD Block and Projection Lens.

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

4. Unscrew the 2 screws fixing the socket holder.

5. Lift the socket holder, then unscrew the 1 screw and remove the thermofuse attachment fittings.

6. Disconnect the connector between power block and K2P.C.Board.

7. Unscrew the 3 screws and remove the block of K1P.C.Board and K2-P.C.Board.

7.5. Removal of S-Module

1. Remove the upper case according to the section 7.2. "Removal of Upper Case".

2. Unscrew the 5 screws and remove the S-Module.

7.6. Removal of WL-P.C.Board (Only for PTLB80NT**/LB75NT**)

1. Remove the upper case according to the section 7.2.

"Removal of Upper Case".

2. Unscrew the 3 screws and remove the WL-P.C.Board.

7.7. Removal of Z-P.C.Board

1. Remove the block of Analysis Block, LCD Block and

Projection Lens according to the steps 1 through 3 in the section 7.11. "Removal of Analysis Block and Projection Lens".

2. Unscrew the 2 screws and remove the lamp fan base.

Note:

· If you disconnected the flexible cable between S-

Module and A-P.C.Board, must put back it to the original condition (Connection described below).

If it makes a mistake in the direction of insertion, the projector does not operate correctly.

3. Unscrew the 2 screws and remove the Z-P.C.Board.

7.8. Removal of B/Q-Module

1. Remove the A-P.C.Board block according to the steps 1

through 5 in the section 7.3. "Removal of A-P.C.Board".

2. Unscrew the 5 screws and remove the S-Module.

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

3. Unscrew the 2 screws and remove the exhaust fan.

4. Unscrew the 3 screws fixing the power block (B/Q-Module and P-Module).

5. Lift the power block, then unscrew the 1 screw and remove the lamp connector terminal.

Note:

· Because the lead wire between the power block and

the lamp connector terminal is short, be careful not to apply excessive force into it.

6. Remove the power block.

8. Unscrew the 2 screws.

9. While pressing to shut each hook of the 2 resinous stands, remove the B/Q-Module.

7.9. Removal of P-Module

1. Remove the power unit (P-Module block) according to the steps 1 through 7 in the section 7.8. "Removal of B/QModule".

2. Unscrew the 2 screws.

3. While pressing to shut each hook of the 2 resinous stands, remove the P-Module.

7. Unscrew the 4 screws and separate the ballast unit and the power unit.

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

7.10. Removal of Lamp Unit

1. Loosen the 2 screws until they idle, remove the lamp unit cover.

2. Loosen the 3 screws until they idle, remove the lamp unit with the handles.

with the handle.

3. Unscrew the 3 screws and remove the block of Analysis Block, LCD Block and Projection Lens.

4. Unscrew the 2 screws A and remove the LCD block .

5. Unscrew the 4 screws B and remove the projection lens (the analysis block remains).

Note:

· When installing the lamp unit in the main unit, place

it in a specified position and press the connector side and the opposite sides of the lamp unit (arrow positions shown in the figure below), and confirm the lamp unit is inserted securely.

Then, tighten the 3 screws fixing the lamp unit, and attach the lamp unit cover.

7.11. Removal of Analysis Block and Projection Lens

7.12. Removal of LCD Block

1. Remove the A-P.C.Board block according to the steps 1 through 5 in the section 7.3. "Removal of A-P.C.Board".

2. Unscrew the 2 screws and remove the LCD block.

Note:

· Be careful not to touch the surface of prism and LCD

panel.

1. Remove the A-P.C.Board block according to the steps 1 through 5 in the section 7.3. "Removal of A-P.C.Board".

2. Loosen the 3 screws until they idle, remove the lamp unit

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

7.13. Replacement of LCD Panel (B)

1. Remove the LCD block according to the section 7.12. "Removal of LCD Block".

Note:

· Be careful not to touch the surface of prism and LCD

panel.

2. Cut the 4 LCD panel installation spindles at the position A and remove the LCD panel.

3. Cut the 4 LCD panel installation spindles at the position B and remove them.

Notes:

· Work carefully not to apply external force around the

spindle part by using a cutter, cutting nipper or the like for cutting the spindle.

· Adjust the height after the spindle is cut to 1 mm or

less.

4. Attach the base plate with 4 screws.

5. Tighten the 2 screws temporarily just until new LCD panel (with the panel attachment and panel adjuster) can be shifted by your fingers.

Note:

· The panel adjustment fittings set (panel attachment,

panel adjuster and base plate) is an option for service.

6. Reassemble the projector in the reverse order of disassembling, but leave the upper case and the screws fixing the A-P.C.Board block as they are removed.

7. Adjust the convergence according to the section 8.3. "Convergence Adjustment".

8. After the adjustment, while paying attention not to vary the adjusting result, tighten the 2 screws fixing the panel attachment with a hexagon head wrench.

Note:

· Prepare a hexagon head wrench processed short.

9. Reassemble the projector as it was.

7.14. Replacement of Incidence

Polarizer (G)

1. Remove the A-P.C.Board block according to the steps 1 through 5 in the section 7.3. "Removal of A-P.C.Board".

2. Mark positions of the incidence polarizer (G).

Note:

· Mark accurately as possible because the marks will

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

be used for resetting the incidence polarizer position.

3. Unscrew the 1 screw and remove the incidence polarizer (G).

4. Attach a new incidence polarizer (G) and align it with the mark.

5. Tighten the 1 screw with care not to move the incidence polarizer position.

4. Replace the incidence polarizer.

Note:

· Do not touch the incidence polarizer directly by the

hand. Must use a fingerstall or clean gloves.

7.15. Replacement of Incidence

Polarizer (R and B)

1. Remove the A-P.C.Board block according to the steps 1 through 5 in the section 7.3. "Removal of A-P.C.Board".

2. Unscrew the 2 screws and remove the LCD block.

Note:

· Be careful not to touch the surface of prism and LCD

panel.

3. Unscrew the 3 screws and remove the analysis case (upper) .

Note:

· The incidence polarizer (G) is installed in the

analysis case (upper). Handle with care not to apply external force to the incidence polarizer (G).

7.16. Replacement of Projection Polarizer

· The procedure is described as an example of projection

polarizer (B).

1. Remove the LCD block according to the section 7.12.

"Removal of LCD Block".

Note:

· Be careful not to touch the surface of prism and LCD

panel.

2. Remove the projection polarizer which requires replacing.

(The projection polarizer is secured with adhesive tape.)

Notes:

· Be careful not to damage peripheral components

(prism, LCD panel, etc.).

· Use tweezers.

3. Install new projection polarizer.

a. Put adhesive tape on the projection polarizer. b. Stick the projection polarizer on the specified position.

Notes:

· Align the projection polarizer with the guides

(lower, side) of LCD block.

· Be careful not to touch the surface of projection

polarizer.

· Use tweezers.

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

−

− If the surface of projection polarizer is caught,

− −

it might be damaged. Must catch the edge of projection polarizer

with tweezers.

c. Press the adhesive part and secure the projection

polarizer.

7.17. Replacement of PBS Array (Analysis Block)

1. Remove the analysis case (upper) according to the steps 1

through 3 in the section 7.15. "Replacement of Incidence Polarizer (R and B)".

2. Remove the PBS array.

3. Install new PBS array.

Note:

· Be careful not to mistake the direction (inside and

outside, upper and lower).

· Be careful not to touch the surface of PBS array.

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

8 Measurement and Adjustments

When the following components in this projector are replaced, adjustments are required. Adjust each item according to the table below.

8.1. Cautions for Adjustment

· Never unplug the power cord until the power indicator on the projector illuminates red.

· To maintain and ensure safety, always use the designated components for replacement parts.

· If removing any clamps, lead wires or connectors, always place them back in their proper locations.

· Be careful not to damage the lead wires or components when using a soldering iron or similar tool.

8.2. Setting Before Adjustment

· Set up the projector to obtain the projection distance below.

· Turn the zoom ring of the projector to obtain the largest size of the picture.

8.3. Convergence Adjustment

Execute this adjustment when replacing the LCD panel (B) .

8.3.1. Tools to be used

Service Kit (Part No. TZSH07026) : This kit is composed of 3 extension flexible cables.

Note:

· Consult your dealer or Authorized Service Center for the service kit.

8.3.2. Preparation

1. Loosen 2 screws fixing the panel adjuster and 2 screws fixing the panel attachment, then tighten the 4 screws temporarily just until the LCD panel can be shifted by your fingers.

Note:

· See figures in the section 7.13. "Replacement of LCD Panel (B)" for 2 screws fixing the panel adjuster and 2 screws

fixing the panel attachment.

2. Reassemble the projector in the reverse order of disassembling, but leave the upper case and the screws fixing the AP.C.Board block as they are removed.

3. Connect the service kit (extension flexible cables).

· Each flexible cable of LCD Panels (R/G/B) - Connectors (A1/A2/A3) on A-P.C.Board

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

4. Covering with an insulator (cloth or the like) to prevent a short circuit, set the A-P.C.Board block on the main unit.

Note:

· Handle with care not to apply external force to connecting parts which connect the main unit and A-P.C.Board.

8.3.3. Adjustment Procedure

Prepare 2 pieces of thick black paper (23 mm × 100 mm) that can be shaded.

· Cover and shade LCD panels (R) and (G) with the paper.

1. Display the green crosshatch pattern and adjust the lens focus.

2. Display green and blue crosshatch patterns.

3. Adjust focus by shifting the panel adjuster for LCD panel (B) back and forth, then tighten the 2 screws.

4. Adjust the LCD panel (B) position so that the vertical center of blue crosshatch pattern is overlapped with the vertical center of green crosshatch pattern.

5. Adjust the LCD panel (B) position so that the horizontal center of blue crosshatch pattern is overlapped with the horizontal center of green crosshatch pattern.

6. Correct the tilt of the blue crosshatch pattern by adjusting the LCD panel (B) position.

7. Display green, red and blue crosshatch patterns and confirm the convergence. If it is necessary, fine adjust the convergence so that the blue crosshatch pattern is overlapped with green one.

Repeat steps (1) to (3) until the green and blue crosshatch patterns merge into a cyan pattern.

8. After the adjustment, reassemble the projector according to the steps 8 in the section 7.13. "Replacement of LCD Panel (B)".

8.4. Software for Adjustment

8.4.1. Outline

· This projector needs computer-aided adjustments.

· After the software adjustments, this projector must be turned off and on again to memorize the settings.

· Connect the cable between the projector and a PC as shown below.

· Updating the software will change the version number.

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

8.4.2. Operating Procedure

1. Run software program by the keyboard entry.

Note:

· Use the software program as below.

Adjustment Tool [PT-LB80, LW80 Series]

2. The first menu is Port selection menu.

3. Adjust the projector by selecting the necessary item from the menu in each stage.

8.4.3. Port Selection Menu

Select the applying item with the list box and click "Data" or "Adjustment".

8.4.3.1. Explanation of Buttons

Port:

Port name of PC which connects with the projector

Data:

Displays the data setting menu.

Adjustment:

Displays the adjustment menu.

Exit:

Exits this application.

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

8.4.4. Data Setting Menu

8.4.4.1. Explanation of Buttons

Micom Data Transmission:

Reads the microcomputer data from the file and transmits it to the projector.

Micom Data Reception:

Receives the microcomputer data from the projector and writes it in the file.

Gamma Data Transmission:

Reads the gamma data from the file and transmits it to the projector.

Gamma Data Reception:

Receives the gamma data from the projector and writes it in the file.

Uniformity Data Transmission:

Reads the color unevenness correction data from the file and transmits it to the projector.

Uniformity Data Reception:

Receives the color unevenness correction data from the projector and writes it in the file.

Serial Number

Displays the serial number setting menu.

Log Display

Displays the log receiving menu.

Exit:

Exits this application.

8.4.4.2. Receiving and transmitting of the data

Click a target button and specify a file name.

8.4.4.3. Setting the Serial Number

Set the serial number if the A-P.C.Board is replaced and the product serial number disappears.

Note:

· Set the projector into standby mode (POWER indicator on the projector illuminated red), and execute the procedure in

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

8.4.4.3.3.

8.4.4.3.1. Setting Menu

8.4.4.3.2. Explanation of Buttons

Send:

Sends and writes the serial number to the projector.

Receive:

Receives the serial number from the projector.

Close:

Closes this dialog.

8.4.4.3.3. Setting Procedure

1. Display the serial number setting menu.

2. Click "Send" button after inputting the serial number.

8.4.4.4. Receiving Log Information

Log information on errors etc. that occurred in this projector can be accessed.

8.4.4.4.1. Receiving Menu

8.4.4.4.2. Explanation of Buttons

Receive:

Receives the log information.

Close:

Closes this display.

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

8.4.4.4.3. Receiving Procedure

1. Display the log receiving menu.

2. Click "Receive" button.

Note:

· The state displayed in log information and the meaning are as follows.

8.4.5. Adjustment Menu

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

8.4.5.1. Explanation of Buttons

Input Level Adjustment RGB:

Displays the RGB input level adjustment menu.

Model Info Setup

Displays the model information setup menu.

Exit:

Exits this application.

8.5. Flicker Adjustment

According to the procedure of chapter 5 "Flicker Adjustment Mode", minimize the flicker.

8.6. Input Level Adjustment

8.6.1. Adjustment Menu

8.6.2. Explanation of Buttons

OK:

Executes automatic sub contrast and sub brightness adjustments, then closes this dialog.

Cancel:

Cancels this menu.

8.6.3. Equipment to be used

PC, RGB Signal Generator, Software for Adjustment

8.6.4. Adjustment Procedure

1. Display Input Level Adjustment(RGB) menu.

2. Input a window pattern signal to COMPUTER 1 IN connector.

Note:

· Use approx. 15 % window pattern as follows.

Black background (screen width) : White window width = 2 : 1 Black background (screen height) : White window height = 3 : 1

· Use the window pattern of XGA (1 024 × 768).

3. Click the OK button.

8.7. Model Information Setup

Set the model information when the A-P.C.Board is replaced.

Note:

· et the projector into standby mode (POWER indicator on the projector illuminated red), and execute the procedure in 8.7.4.

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

8.7.1. Adjustment Menu

8.7.2. Explanation of Buttons

Radio buttons:

Selects the corresponding model name.

OK:

Executes model information setup, then closes this dialog.

Cancel:

Cancels this menu.

8.7.3. Equipment to be used

PC, Software for Adjustment

8.7.4. Setup Procedure

1. Display Model Information Setup menu.

2. Select the corresponding model name.

3. Click the OK button.

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

9 Troubleshooting

PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA

+ 88 hidden pages