3M MP7770 User Manual

MP7770 Multimedia Projector

Service Manual

3M Visual Systems Division EPS Service Documentation
6801 River Place Boulev

ard Copyright © 2002, 3M IPC. All Rights Reserved.

Austin, T

exas 78726-9000 78-6970-8985-8

Warranty and Limited Remedy. This product will be free from defects in material and manufacture for a period o

f

two years from the date of purchase. 3M MAKES NO OTHER WARRANTIES INCLUDING, BUT NOT LIMITED TO, ANY
IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. If this product is defective

within the warranty period stated above, your exclusive remedy shall be, at 3M’s option, to replace or repair the 3M product o

r

refund the purchase price of the 3M product. ______________________________________________________________

_

Limitation of Liability

. Except where prohibited by law, 3M will not be liable for any loss or damage arising from this

3M product, whether direct, indirect, special, incidental or consequential regardless of the legal theory asserted.

MP7770 Table of Contents

 2002, 3M IPC. i

SECTION 1. MACHINE OVERVIEW

1-1 Overview.................................................................................................................................................1-1

1-2 Machine Identification............................................................................................................................1-1

1-3 Cleaning..................................................................................................................................................1-1

1-4 Safety......................................................................................................................................................1-2

1-5 Specifications..........................................................................................................................................1-3

SECTION 2. DISASSEMBLY/REASSEMBLY

2-1 Overview.................................................................................................................................................2-1

2-2 Required Tools........................................................................................................................................2-1

2-

3

Steps for Removing Projector Components............................................................................................2-1

2-3-1 Remove Bottom Cover...........................................................................................................2-2

2-3-2 Remove Top Cover.................................................................................................................2-4

2-3-3 Remove Interface Board Plate................................................................................................2-5

2-3-4 Remove Interface Board.........................................................................................................2-6

2-3-5 Remove DMD Kit...................................................................................................................2-7

2-3-6 Remove Main Fan...................................................................................................................2-8

2-3-7 Remove Power Supply and Flyback Converter......................................................................2-9

2-3-8 Remove Video Board .............................................................................................................2-10

SECTION 3. TROUBLESHOOTING

3-1 Troubleshooting Flowcharts...................................................................................................................3-1

3-1-1 Firmware Update.........................................................................................................................3-1

3-1-

2

Fan Cooling System Check.........................................................................................................3-2

3-1-3 Sound Check................................................................................................................................3-3

3-1-4 Video Check................................................................................................................................3-4

3-1-

5

No Image, Start-Up Screen OK...................................................................................................3-5

3-1-

6

No Image, No Start-Up Screen....................................................................................................3-6

3-1-

7

Lamp Does Not Work..................................................................................................................3-7

3-1-8 No Function.................................................................................................................................3-8

3-1-

9

Switch OFF In Hot Condition.....................................................................................................3-9

MP7770 Table of Contents

 2002, 3M IPC. ii

SECTI

ON 4. THEORY AND DIAGRAMS

4-1 Theory of Operation..............................................................................................................................4-1

4-2 Wiring Diagrams...................................................................................................................................4-2

4-2-1 Wire Routing ...............................................................................................................................4-2

4-2-

2

Wire Routing Parts Identification................................................................................................4-3

4-2-3 Component Connections .............................................................................................................4-4

4-3 Cabling and Cable Connectors..............................................................................................................4-5

4-3-

1

PC and MAC Cabling..................................................................................................................4-5

4-3-2 PC Cabling...................................................................................................................................4-6

4-3-

3

Cabling Parts Identification.........................................................................................................4-7

4-3-4 Cable Connectors.........................................................................................................................4-8

4-4 Functional Diagrams .............................................................................................................................4-11

4-4-1 Component Layout......................................................................................................................4-11

4-4-

2

Component Pin Connections.......................................................................................................4-12

3M™ Multimedia Projector MP7770 Machine Overview

 2002, 3M IPC. 1-1

1. Machine Overview

1-1. Overview

Make advanced adjustments to this projector in a clean environment with minimal dust and positive pressure.
This section provides the advanced adjustment procedures needed to maintain a high quality projection image.
There is a specific order that adjustments are to be made and specific tools needed to complete each adjustment.

Important

Only complete advanced adjustments to a projector
when the machine settings fall outside of the
allowable tolerances for that adjustment or when
instructed to do so by another procedure.

1-2. Machine Identification

To avoid incorrect adjustments or part replacements, verify the model and version of the projector prior to
making any adjustments or repairs.

Different versions have unique adjustment requirements. The serial number for the projector is located on the
machine identification label on the bottom of the projector.

1-3. Cleaning

When cleaning any components of the light engine, extreme care must be taken. Use only soft, dry, clean,
Chamois Swabs (Part number 78-8118-3302-5) to clean reflective surfaces. No chemicals should be used on any
surface.

Important

Use extreme care when cleaning any optics
device. Special coatings can be scratched very
easily.

3M™ Multimedia Projector MP7770 Machine Overview

 2002, 3M IPC. 1-2

1-4. Safety

Read and understand all safety procedures before making any repairs to the MP7770 Multimedia Projector.

Note

When

any work is being carried out on the device, the mains cable must be disconnected from the mains supply.
Only service personnel may carry out service work. For any repair regional and corresponding national regulations
are to be followed.

Up to 30.000 V may be incurred when the lamp is ignited; lethal hazard!

An isolation transformer has to be used during any service to avoid possible shock hazard, because of not
protected live parts on opened device
Eye damage may result from directly viewing into the lamp
The lamp is very high temperature and high pressure during operation. Cool down, before opening lamp cover and
handling. Wear special protective glasses. Never switch “ON“ without the lamp (high voltage an lamp wiring, 25-35
kV).

1

1. Service and repairs may only be carried
out by well-trained personnel. Regional
and national regulations concerning the
execution of repairs have to be observed.

2.

O

perate the unit with mounted protection
plate only (item 1) for protection against
possible lamp explosion.

3.Put the unit on an antistatic and hard-to­ inflame support only.

4.

Cables around power supply and lamp
are under high tension.

5. Take care not to touch the lamp base
when replacing the lamp. It is extremely
hot and may cause burns to the skin.

Allow the unit at least 5 minutes to cool
down.

3M™ Multimedia Projector MP7770 Machine Overview

 2002, 3M IPC. 1-3

1-5. Specifications

4,5

x

3,4

1,5

x

1,13

2
x

1,5

2,5

x

1,88

3
x

2,25

3,5

x

2,63

4
x
3

H%

B

x

H

36mm tele

6,0

L

(m)

28mmwide

(m)

4,0

3,0

2,0

5,4

4,7

3,4
3,3

2,7
2,6

2,3

1,9

1,5

1,1

~

100 - 240V AC
200 - 240V AC

50 - 63 Hz

35 C max

10 C min

3,0 Kg

95 F max

50 F min

1024

768

80

40

215

257

H

B

L

3M™ Multimedia Projector MP7770 Disassembly/Reassembly

 2002, 3M IPC. 2-1

2. Disassembly/Reassembly

2-1. Overview

Disassembly and reassembly of the MP7770 is done using the reference photographs and the step-by-step
procedures that follow. Many component disassembly steps build upon previous disassembly steps. Refer to the
previous disassembly steps as needed.

For general machine operation instructions including air filter or lamp replacement, refer to the Operator’s
Guide.

To avoid electrical shocks, unplug projector power cord before performing any
maintenance to electrical components.

To avoid burns to fingers, allow projector lamp and internal projector components to
cool off prior to lamp removal or disassembly.

2-2. Required Tools

An entire disassembly and reassembly can be completed with the following tools:

•= #3 T

orx driver

•= #10 Torx driver

•= #15 Torx driver

•= 5 mm nut driver

•= 5.5 mm nut driver

•= Wire cutter

2-3. Steps for Removing Projector Components

Removal topics include:

•= B

ottom Cover

•= Top Cover

•= Interface Board Plate

•= Interface Board

•= DMD Kit

•= Main Fan

•= Power Supply and Flyback Converter

•= Video Board

√√√√ Note

If performing a complete disassembly, record lamp time.

!

Caution

!

WARNING

3M™ Multimedia Projector MP7770 Disassembly/Reassembly

 2002, 3M IPC. 2-2

1

2

3

2-3-1. Remove Bottom Cover

To avoid electrical shocks, unplug projector
power cord before performing any maintenance to
electrical components.

To avoid burns to fingers, allow projector lamp
and internal projector components to cool off prior
to lamp removal or disassembly.

1.

Press locking tabs and lift upward to remove

air filter

cover.

2.

Press locking tab and open lamp

door.

3.

Press both sides of wire clip/handle to disengag

e.

!

Caution

!

WARNING

3M™ Multimedia Projector MP7770 Disassembly/Reassembly

 2002, 3M IPC. 2-3

4

5

6

7

8

4. Using steady pressure, pull upward on clip/handle to
rem

ove lamp m

odule.

5.

Close lamp

door.

6.

Use a #10 torx driver and remove five

(5) screws on

bottom

of proj

ector.

7.

Remove one (1) longer screw by adjustme

nt foot.

8.

Carefully lift bottom cover off of projector body

.

9.

Reassemble in reve

rse order.

3M™ Multimedia Projector MP7770 Disassembly/Reassembly

 2002, 3M IPC. 2-4

2

1

3

4

2-3-2. Remove Top Cover

To avoid electrical shocks, unplug projector
power cord before performing any maintenance to
electrical components.

To avoid burns to fingers, allow projector lamp
and internal projector components to cool off prior
to lamp removal or disassembly.

R

emove bottom cover.

1.

Use a #10 torx driver and remove

three (3) screws

securing

top cove

r.

2.

Turn the projector over and carefully

lift upward on

the top cov

er to separate it from the proj

ector

components.

√√√√ Note

Attached to the top cover is a ribbon cable and wire
connector that must be disconnected.

3. Disconnect ribbon cable.

4. Disconnect wire connector.

5.

Remove top cove

r.

6.

Reassemble in reverse order.

!

Caution

!

WARNING

3M™ Multimedia Projector MP7770 Disassembly/Reassembly

 2002, 3M IPC. 2-5

1

2

3

2-3-3. Remove Interface Board Plate

To avoid electrical shocks, unplug projector power

cord before performing any maintenance to
electrical components.

To avoid burns to fingers, allow projector lamp
and internal projector components to cool off prior
to lamp removal or disassembly.

Rem

ove top and bottom covers.

1.

Use a 5mm nut driver and remove

four (4) nuts

securing plate.

2. Disconnect wire connector.

3. Rem

ove

plate.

4.

Reassemble in reve

rse order.

!

Caution

!

WARNING

3M™ Multimedia Projector MP7770 Disassembly/Reassembly

 2002, 3M IPC. 2-6

1

3

2

2-3-4. Remove Interface Board

To avoid electrical shocks, unplug projector
power cord before performing any maintenance to
electrical components.

To avoid burns to fingers, allow projector lamp
and internal projector components to cool off prior
to lamp removal or disassembly.

R

emove top cover, bottom cover and interface board

plate.

1.

Disconnect seve

n (7) wire connectors.

2. Disconnect ribbon cable.

3.

Use #10 torx driver to remove

three (3) screws

securing board.

4.

Carefully

pull at top of board to separate the white pin

connector.

5.

Reassemble in reve

rse order.

!

Caution

!

WARNING

4

3M™ Multimedia Projector MP7770 Disassembly/Reassembly

 2002, 3M IPC. 2-7

1

5

6

3

2

4

2-3-5. Remove DMD Kit

To avoid electrical shocks, unplug projector
power cord before performing any maintenance to
electrical components.

To avoid burns to fingers, allow projector lamp
and internal projector components to cool off prior
to lamp removal or disassembly.

R

emove top cover, bottom cover, interface board plate

and interface board.

1.

Use #10 torx driver to loosen one (1) screw securing
the thermo

stat.

2.

Use a 5.5mm nut driver to remove

three (3) nuts.

3.

Use a #3 torx driver and remove

four (4) nuts.

4.

Use a #10 torx driver and remove

one (1) screw.

√√√√ Note

The DLP-Kit replacement board will
come with a protective spacer.
Remove spacer and install it on
all warranty returns, to prevent
damage during shipment.

5.

Carefully separate DMD board and lay

it down on the

bench top.

6. Disconnect one (1) ribbon cable connector.

√√√√ Note

Notice the printing on the ribbon cable and during
reassembly, install the ribbon cable same side up.
Reversing the cable will cause poor image quality.

7. Reassemble in reverse order.

!

Caution

!

WARNING

3M™ Multimedia Projector MP7770 Disassembly/Reassembly

 2002, 3M IPC. 2-8

1

2

5

4

3

2-3-6. Remove Main Fan

To avoid electrical shocks, unplug projector
power cord before performing any maintenance to
electrical components.

To avoid burns to fingers, allow projector lamp
and internal projector components to cool off prior
to lamp removal or disassembly.

Rem

ove top and bottom covers.

1.

Disconnect all wire connectors from

fan.

√√√√ Note

It is very important to repeat the exact wire paths during
reassembly. A different wire path can cause excess noise
and reduce image quality.

2.

Cut three (3) wire ties securing wi

res.

3.

Use a #10 torx driver to remove

three (3) screws

securing fan.

4.

Slide the fan assembly forward to access one (1) wi

re
connector located underneath. Disconnect wire
connector.

5.

Lift upward to remove the fan assembly

.

6.

Reassemble in reve

rse order.

!

Caution

!

WARNING