Panasonic PT-LB30NTU, PT-LB30NTE, PT-LB30NTEA, PT-LB30U, PT-LB30E Service Manual

PT-LB30NTU
PT-LB30NTE
PT-LB30NTEA
PT-LB30U
PT-LB30E
PT-LB30EA

ORDER NO. VED0506363C0

D10

LCD Projector

© 2005 Matsushita Electric Industrial Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.

PT-LB30NTU / PT-LB30NTE / PT-LB30NTEA / PT-LB30U / PT-LB30E / PT-LB30EA

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PT-LB30NTU / PT-LB30NTE / PT-LB30NTEA / PT-LB30U / PT-LB30E / PT-LB30EA

CONTENTS

Page Page

1 Safety Precautions 5 1.1. General Guidelines 5

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PT-LB30NTU / PT-LB30NTE / PT-LB30NTEA / PT-LB30U / PT-LB30E / PT-LB30EA

1.2. Leakage Current Check 5

1.3. UV Precaution and UHM Lamp Precautions

2 Ext Option

2.1. Procedure to enter EXT OPTION

2.2. EXT OPTION Menu and Functions

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 Service Mode

4.1. Procedure to enter the service mode

4.2. Canceling the service mode

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. Basic Format

6.5. Control / Query Commands

6.6. Communication Cable Specifications

6.7. Signal Selector Connecting 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 WL-P.C.Board (PT-LB30NTU/E/EA only)

7.5. Removal of S1-P.C.Board

7.6. Removal of S2-P.C.Board

7.7. Removal of K-P.C.Board

7.8. Removal of G-P.C.Board

7.9. Removal of B/Q-Module

7.10. Removal of P-Module

7.11. Removal of Lamp Unit

7.12. Removal of Analysis Block and Lens

7.13. Removal of LCD Block

7.14. Replacement of LCD Panel

7.15. LCD Panel Discrimination

7.16. LCD Panel Combination

7.17. Replacement of Incidence Polarizer (R and B)

7.18. Replacement of Incidence Polarizer (G)

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7.19. Replacement of Projection Polarizer

7.20. Replacement of PBS Array (Analysis Block)

8 Measurement and Adjustments

8.1. Adjustment Procedure Flowchart

8.2. Cautions for Adjustment

8.3. Setting Before Adjustment

8.4. Convergence Adjustment

8.5. Lighting Area Adjustment

8.6. Software for Adjustment

8.7. Flicker Adjustment

8.8. Input Level Adjustment

8.9. 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 (1/4)

12.2. A-P.C.Board (2/4)

12.3. A-P.C.Board (3/4)

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

12.5. WL-P.C.Board (1/2)

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

12.7. B-Module (1/2)

12.8. B-Module (2/2)

12.9. K-P.C.Board

12.10. S1-P.C.Board, S2-P.C.Board

12.11. G-P.C.Board

13 C irc uit Boards

13.1. A-P.C.Board (Foil Side) / WL-P.C.Board (Foil
Side/Component Side)

13.2. A-P.C.Board (Component) , S1/G-P.C.Board (Foil
Side/Component Side)

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

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PT-LB30NTU / PT-LB30NTE / PT-LB30NTEA / PT-LB30U / PT-LB30E / PT-LB30EA

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.

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

power line before the service.

· 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.

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.

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

3)

Fig. 1

Table 1

Fig. 2

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

Fig.3

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PT-LB30NTU / PT-LB30NTE / PT-LB30NTEA / PT-LB30U / PT-LB30E / PT-LB30EA

2 Ext Option

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

· There are SELF CHECK and SERVICE MODE 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 "OSD" on "OPTION" menu and press "ENTER" button 3 seconds or longer.
MENU → OPTION → OSD

2.2. EXT OPTION Menu and Functions

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

· ANGLE RESET
Switching ON/OFF "AUTO KEYSTN (Automatic Keystone)" reference level setting

Note:

−

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

− −

· FAN FULLMODE

Setting the cooling fan motor rotation speed

−

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

− −

FULLMODE" is ON, changing "FAN CONTROL" in OPTION becomes impossible (setting FAN FULLMODE is given priority
more than FAN CONTROL).

· 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.

· SELF CHECK
To enter the self-check mode

· SERVICE MODE
To enter the service mode

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PT-LB30NTU / PT-LB30NTE / PT-LB30NTEA / PT-LB30U / PT-LB30E / PT-LB30EA

· FLICKER ADJ

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.

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PT-LB30NTU / PT-LB30NTE / PT-LB30NTEA / PT-LB30U / PT-LB30E / PT-LB30EA

3.2. Self Check Display and Contents

3.3. Canceling the self-check mode

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

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PT-LB30NTU / PT-LB30NTE / PT-LB30NTEA / PT-LB30U / PT-LB30E / PT-LB30EA

4 Service Mode

This mode is used to display 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:

· On the service mode, displays above patterns by each color without test equipment such as PC or SG. Use the service

mode for simplified adjustments by your eyes and so on.

4.1. Procedure to enter the service mode

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

Note:

· In the service mode, pressing the up-arrow "

left-arrow "

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

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

4.2. Canceling the service mode

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

5 Flicker Adjustment Mode

If replacing the optical parts (Analysis / LCD / Lens 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 ADJ" 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.

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PT-LB30NTU / PT-LB30NTE / PT-LB30NTEA / PT-LB30U / PT-LB30E / PT-LB30EA

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 basic format below.

6.1. Connection

Note:

Use a proper communication cable which is suitable for the PC to connect the optional serial adapter, which is connected with
SERIAL connector of this projector, and the PC.

6.2. Pin Layout and Signal Names for SERIAL Connector

Pin No Signal Name Contents

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

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PT-LB30NTU / PT-LB30NTE / PT-LB30NTEA / PT-LB30U / PT-LB30E / PT-LB30EA

6.4. Basic Format

The data sent from the PC to the projector is transmitted in the format shown below.

Notes:

· If sending multiple commands, check that a call back has been received from the projector for 1 command before sending

the next command.

· When a command which does not require parameters is sent, the colon (:) is not required.

6.5. Control / Query Commands

Control Commands

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PT-LB30NTU / PT-LB30NTE / PT-LB30NTEA / PT-LB30U / PT-LB30E / PT-LB30EA

Query Commands

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Parameters

PT-LB30NTU / PT-LB30NTE / PT-LB30NTEA / PT-LB30U / PT-LB30E / PT-LB30EA

[Example]

When controls the audio volume to +30 by a PC
(Sends commands as the following:)

· When a command which does not require parameters is sent, the colon (:) is not required.

6.6. Communication Cable Specifications

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PT-LB30NTU / PT-LB30NTE / PT-LB30NTEA / PT-LB30U / PT-LB30E / PT-LB30EA

6.7. Signal Selector Connecting Cable Specifications

When connecting to a signal selector (ex. TW-SWS62J), use a cable with specifications below.
Connecting method: Connects a video signal cable from the signal selector to "VIDEO IN", and an RGB signal cable to "RGB1 IN".

Note:

Set VP control terminal switch of the signal selector to VP TYPE "B".

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PT-LB30NTU / PT-LB30NTE / PT-LB30NTEA / PT-LB30U / PT-LB30E / PT-LB30EA

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.

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

7.1. Printed Circuit Board and Main Parts Location

Electrical Parts

Optical Parts

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PT-LB30NTU / PT-LB30NTE / PT-LB30NTEA / PT-LB30U / PT-LB30E / PT-LB30EA

7.2. Removal of Upper Case

1. Turn the projector upside down.

2. Unscrew the 6 screws.

3. Return the projector to the normal position.

4. Lift the upper case upward (approx. 10 cm).

5. Disconnect the cable from S1-P.C.Board (connector A8 on
A-P.C.Board) and remove the upper case.

5. Disconnect the connectors from/to the A-P.C.Board block
with the S2- and G-P.C.Boards.

6. Unscrew the 3 screws and remove the A-P.C.Board block.

7.3. Removal of A-P.C.Board

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

2. Unscrew the 1 screw on the backside and remove the
connector cover.

3. Unscrew the 1 screw fixing the connector metal fittings on
the backside.

4. Unscrew the 4 screws and remove the lamp shield.

7. Disconnect the flexible cable from connector A20 on A­P.C.Board.

8. Unscrew the 10 screws and remove the connector metal
fittings.

Notes:

· Because the S2-P.C.Board block is attached, work

carefully when removing the connector metal fittings.

· G-P.C.Board is attached to the connector metal

fittings. Be careful with handling.

9. While disconnecting the connector between A- and S2­P.C.Boards, remove the S2-P.C.Board block.

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7.4. Removal of WL-P.C.Board (PT­LB30NTU/E/EA only)

PT-LB30NTU / PT-LB30NTE / PT-LB30NTEA / PT-LB30U / PT-LB30E / PT-LB30EA

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

"Removal of Upper Case".

2. Unscrew the 4 screws and remove the shield metal and

wireless LAN module.

Notes:

· Because the wireless LAN module is connected with

the WL-P.C.Board, work carefully when removing it.

· When installing/detaching the antenna connector,

insert or pull out it straight along the center of the
connector pin. It causes damage and/or poor
contacting of the connector when forcibly
installing/detaching it.

· When reassembling, secure the antenna coaxial

cable with the radio wave absorption tape that had
been used originally, and return it to the original
condition.

· Connect the connector from the antenna with the

original position (connector on the wireless LAN
module) after reassembling.

3. Unscrew the 1 screw and remove the WL-P.C.Board.

7.6. Removal of S2-P.C.Board

1. Remove the S2-P.C.Board block according to the section

7.3. "Removal of A-P.C.Board".

2. Remove the holder while expanding the resin hooks
outside.

Note:

· Work carefully not to damage the resin hook.

7.7. Removal of K-P.C.Board

1. Remove the analysis block, LCD block and lens according
to the steps 1 through 3 in the section 7.12. "Removal of
Analysis Block and Lens".

2. Unscrew the 2 screws and remove the lamp unit terminal.

7.5. Removal of S1-P.C.Board

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

2. Unscrew the 2 screws and remove the S1-P.C.Board.

3. Unscrew the 2 screws and remove the socket holder.

4. Unscrew the 1 screw and separate the socket holder and
thermofuse attachment fittings.

5. Unscrew the 2 screws and remove the K-P.C.Board.

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PT-LB30NTU / PT-LB30NTE / PT-LB30NTEA / PT-LB30U / PT-LB30E / PT-LB30EA

7.8. Removal of G-P.C.Board

5. Unscrew the 4 screws and remove the power block (P­Module and B/Q-Module).

6. Unscrew the 3 screws and remove the power box.

1. Remove the A-P.C.Board block according to the steps 1
through 6 in the section 7.3. "Removal of A-P.C.Board".

2. Disconnect the flexible cable between the G-P.C.Board and
A-P.C.Board.

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

7.9. Removal of B/Q-Module

1. Remove the lamp unit according to the section 7.11.
"Removal of Lamp Unit".

2. Remove the A-P.C.Board block according to the steps 1
through 6 in the section 7.3. "Removal of A-P.C.Board".

3. Unscrew the 2 screws and remove the lamp unit terminal.

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

7. While pressing to shut each hook of the 4 resinous stands,
remove the B/Q-Module.

7.10. Removal of P-Module

1. Remove the power block and power box according to the
steps 1 through 6 in the section 7.9. "Removal of B/Q
Module".

2. Unscrew the 1 screw.

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

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7.11. Removal of Lamp Unit

1. Turn the projector upside down.

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

PT-LB30NTU / PT-LB30NTE / PT-LB30NTEA / PT-LB30U / PT-LB30E / PT-LB30EA

7.12. Removal of Analysis Block
and Lens

1. Remove the lamp unit according to the section 7.11.

"Removal of Lamp Unit".

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

through 6 in the section 7.3. "Removal of A-P.C.Board".

3. Unscrew the 3 screws and remove the analysis block, LCD

block and lens.

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

Note:

· When installing the lamp unit (or a new one) in the

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

Then, tighten the 2 screws fixing the lamp unit, and
attach the lamp unit cover.

4. Unscrew the 4 screws A and remove the lens.

5. Unscrew the 2 screws B and remove the LCD block (the
analysis block remains).

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PT-LB30NTU / PT-LB30NTE / PT-LB30NTEA / PT-LB30U / PT-LB30E / PT-LB30EA

7.13. Removal of LCD Block

1. Remove the A-P.C.Board block according to the steps 1
through 6 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.

7.14. Replacement of LCD Panel

· The procedure is described as an example of LCD panel
(R).

1. Remove the LCD block according to the section 7.13.
"Removal of LCD Block".

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 adjuster complete set (adjuster,

attachment and base plate) is the 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.

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PT-LB30NTU / PT-LB30NTE / PT-LB30NTEA / PT-LB30U / PT-LB30E / PT-LB30EA

7. Adjust the convergence according to the section 8.4.
"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.

Notes:

· Prepare a hexagon head wrench processed short.

9. Reassemble the projector as it was.

7.15. LCD Panel Discrimination

LCD

panel

R L5BDAXQ00224

G L5BDAXQ00225

B L5BDAXQ00226

Part No. ID-tag seal

Red

(L3P08X-45G10)

—

(L3P08X-45G10)

Blue

(L3P08X-45G10)

7.17. Replacement of Incidence
Polarizer (R and B)

1. Remove the LCD block according to the section 7.13.

"Removal of LCD Block".

2. Unscrew the 2 screws.

3. Remove the analysis case (upper) while expanding the

hook of it outside.

Note:

· Because the hook is damaged easily, be careful not

to expand it excessively.

· The incidence polarizer (G) is installed in the

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

ID-tag seal color LCD panel

Red LCD panel (R)
Blue LCD panel (B)

(No seal) LCD panel (G)

· Since the ID-tag seal is pasted to the FPC of LCD Panel,

(R), (G) or (B) can be easily identified by the color of the
seal.

· Finally, identify the panel color by the part number printed

on the FPC.

4. Replace the incidence polarizer.

Note:

· Be careful not to touch the surface of incidence

polarizer.

7.16. LCD Panel Combination

· Part number is printed on the FPC of LCD Panel.

· When replacing LCD Panel, use a component which has

the same part number as the original.

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PT-LB30NTU / PT-LB30NTE / PT-LB30NTEA / PT-LB30U / PT-LB30E / PT-LB30EA

7.18. Replacement of Incidence
Polarizer (G)

1. Remove the LCD block according to the section 7.13.
"Removal of LCD Block".

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.

c. Press the adhesive part and secure the projection

polarizer.

1. Remove the A-P.C.Board block according to the steps 1
through 6 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

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.

7.19. Replacement of Projection

Polarizer

· The procedure is described as an example of projection
polarizer (R).

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7.20. Replacement of PBS Array
(Analysis Block)

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

through 3 in the section 7.17. "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-LB30NTU / PT-LB30NTE / PT-LB30NTEA / PT-LB30U / PT-LB30E / PT-LB30EA

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