InFocus DP8000, DP8000HB Service Manual
Service Guide for the
DP8000/DP8000HB
SAFETY PRECAUTION
WARNING: Service should not be attempted by anyone unfamiliar with the necessary precautions on this
projector. The following are the necessary precautions to be observed before servicing this chassis.
1 . An isolation Transformer should be connected in the power line between the projector and the AC Iine
before any service is performed on the projector.
2. When replacing a chassis in the cabinet, always be certain that all the protective devices are put back in
place, such as; non-metallic control knobs, insulating covers, shields, isolation resistor-capacitor network
etc.
3. Before returning the set to the customer, always perform an AC Ieakage current check on the exposed
metallic parts of the cabinet, such as terminals, screwheads, metal overlays, control shafts etc. to be sure
the set is safe to operate without danger of electrical shock. Plug the AC Iine cord directly into a AC outlet
(do not use a line isolation transformer during this check). Use an AC voltmeter having 5000ohm per volt or
more sensitivity in the following manner: Connect a1500ohm 10W resistor, paralleled by a 0.15 µF, AC type
capacitor, between a known good earth ground (water
pipe, conduit, etc.) and the exposed metallic parts, one
at a time. Measure the AC voltage across the combina-
tion of 1500ohm resistor and 0.15 µF capacitor. Reverse
the AC plug at the AC outlet and repeat AC voltage mea-
surements for each exposed metallic part. Voltage mea-
sured must not exceed 5.25V(rms). This corresponds
to 3.5 mA(AC). Any value exceeding this limit consti-
tutes a potential shock hazard and must be corrected
immediately.
PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These charac-
teristics are often passed unnoticed by a visual inspection and the protection afforded by them cannot neces-
sarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts
which have these special safety characteristics are identified in this manual and its supplements; electrical
components having such features are identified by the international hazard symbols on the schematic diagram
and the parts list.
Before replacing any of these components, read the parts list in this manual carefully. The use of substitute
replacement parts which do not have the same safety characteristics as specified in the parts list may create
shock, fire or other hazards.
ULTRAVIOLET DANGER IN SERVICE MODE
Eye damage may result from directly viewing the light produced by the lamp used in this product. Always turn
off lamp before opening this cover. Ultraviolet radiation eye protection required during servicing.
LP790 Service Manual 2
TLPB2 Service Manual Rev. 2.0
Table of Contents
Safety Precautions........................................................................................................ 5
Important Precautions .................................................................................................. 5
Important Safety Instructions ...................................................................................... 6
Parts Replacement ........................................................................................................ 7
What is the difference between the DP8000 and the DP8000HB? 7
Replaceable Part Hierarchy 8
Remove and Replace the Lamp Door and Lamp Module 9
Remove and Replace the Dust Filter 11
Remove and Replace the Rear Feet 13
Remove and replace the Top Case and Keypad 14
Remove and Replace the Speakers 18
Remove and Replace the IR ECA and IR Window 20
Remove and Replace the Ballast 21
Remove and Replace the Handle 27
Remove and Replace the Engine Blower 28
Remove and Replace the Thermal Switch 30
Remove and Replace the Controller ECA 32
Remove and Replace the NV RAM Chip on the DP8000HB 37
Change the Logo Screen 40
Remove and Replace the Side Vent and Fans 44
Remove and Replace the Lamp Blower 46
Remove and Replace the Elevator Assembly 48
Remove and Replace the Power Supply 51
Remove and Replace the Optical Engine 54
Remove and Replace Lamp Housing 58
Remove and Replace the Interlock Switch and Interlock Switch Cable 62
Remove and Replace the Bottom Case 65
Remove and Replace the Focus and Zoom Rings 66
Functional Tests.......................................................................................................... 68
Required equipment 68
Before beginning 69
Perform the following tests 69
Troubleshooting.......................................................................................................... 72
Troubleshooting Power Problems 73
Troubleshooting Image Problems 77
Troubleshooting Audio Problems 81
Troubleshooting Remote Control Problems 85
Troubleshooting Keypad Problems 86
Troubleshooting Menu Problems 87
Check Controller Voltages 88
Check Speaker Resistance 89
Wiring Diagram 90
DP8000/8000HB Service Manual 3
Parts Lists.................................................................................................................... 91
Exploded View 91
Legend 92
FRUs by alphabetic listing 94
Hardware Kit Contents 97
Standard Accessories 98
DP8000/8000HB Service Manual 4
SAFETY PRECAUTIONS
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS
CAUTION: Laser beam is emitted when the laser button of the remote control is pressed. Do not
APPLIANCE T O RAIN OR M OIST URE. DANGEROUS HIGH VOLTAGES AR E
PRESENT INSIDETHE ENCLOSURE. DO NOT OPEN THE CABINET. REFER
SERVICING TO QUALIRED PERSONNEL ONLY.
look from the front of the remote contr ol. Do not face towar d a person or to a mirror.
The lightning flash with arrowhead
symbol, within an equilater al triangle,
is intended to alert the user to the
presenc e of uninsulated "dangerous
voltage" within the product's
enclosure that may be of sufficient
magnitude to c onstitute a risk of
electric shock to persons.
The exclamation point within an
equilateral triangle is intended to
alert the user to the presenc e of
important operating and
maintenance (s ervicing) instructions
in the literature accompanying the
appliance.
FCC Radio Frequency Interf erence Statement
Note: This equipment has been tested and found to c omply with the limits for a Class A
WARNING: Changes or modifications made to this equipment, not expressly approved by
Notice: This Class A digital apparatus complies with Canadian ICES-003.
IMPORTANT PRECAUTIONS
Save Original Packi ng Mater ials
The original shipping carton and packing materials will come in
handy if you ever have t o ship your LCD projector. For maximum
protection, repack the set as it was originally packed at the factory.
digital device, purs uant to part 15 of the FCC Rules. These limits are designed to
provide reasonable pr otection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can
radiates radio frequency energy and, if not inst alled and used in accordance with the
instruction manual, may cause harmful interference t o radio communic ations.
Operation of this equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct the interf erence at his
own expens e.
Toshiba, or parties authorized by Toshiba, could void the us er's authority to operate
the equipment.
Cet appareil numérique de la classe A est conforme à la norme NMB-003 du
Canada.
In the spaces provided below, record the Model and Serial No. Iocated
at the rear of your LCD projector.
Mode No. Serial No.
Retain this information for future reference.
Avoid Volatile Liquid
Do not us e volatile liquids, s uch as an insect spr ay, near the unit.
Do not leave rubber or plastic products t ouching the unit for a long
time. They will mar the finish.
Moisture Condensation
Never operate this unit immediately after moving it fr om a cold
location to a warm location. When the unit is exp osed to such a
change in temperature, moisture may condens e on the crucial
internal parts. To prevent the unit from possible damage, do not use
the unit for at least 2 hours when there is an extreme or sudden
change in temperature.
LP280/LP290 Service Manual 4
IMPORTANT SAFETY INSTRUCTIONS
CAUTION: PLEASE READ AND OBSERVE
ALLWARNINGS AND
INSTRUCTIONS GIVEN IN THIS
OWNER'S MANUAL AND THOSE
MARKED ON THE UNIT. RETAIN
THIS BOOKLET FOR FUTURE
REFERENCE.
This set has been designed and manufactur ed
to assure personal safety. Improper use can
result in electric shock or fire hazard. The
safeguards inc orporated in this unit will protect
you if you observe the f ollowing procedures for
installation, us e and servicing. This unit is fully
transistorized and does not contain any parts
that can be repaired by the user.
DO NOT REMOVE THE CABINET COVER, OR
YOU MAY BE EXPOSED TO DANGEROUS
VOLTAGE. REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL ONLY.
1. Read Owner's Manual
After unpacking this product, read the
owner's manual carefully, and follow all
the operating and other instructions.
2. Power Sources
This product should be operated only from
the type of power source indicated on the
marking label. If you are not sure of the
type of power supply to your home,
consult your product dealer or local power
company.
For products intended to operate from
battery power, or other sources, refer to
the operating instructions.
3. Source of Light
Do not look into the lens while the lamp
is on. The strong light from the lamp may
cause damage to your eyes or sight.
4. Ventilation
Openings in the cabinet are provided for
ventilation and to ensure reliable
operation of the product and to pr otect it
from overheating, and these openings
must not be blocked or covered. The
openings should never be blocked by
placing the product on a bed, sofa, rug or
other similar surface. This product should
not be placed in a built-in installation such
as a bookcase or rack unless proper
ventilation is provided or the
manufacturer's instructions have been
adhered to.
IMPORTANT SAFETY INSTRUCTIONS
5. Heat
The product should be situated away from
heat sources such as radiators heat
registers, stoves, or other pr oducts
(including amplifiers) that produc e heat.
6. Water and Moisture
Do not use this product near water - for
example, near a bath tub, wash bowl,
kitchen sink, or laundry tub; in a wet
basement ; or near a swimming pool and
the like .
7. Cleaning
Unplug this pr oduct from the wall outlet
before cleaning. Do not use liquid cleaners
or aerosol cleaners. Use a damp cloth for
cleaning.
8. Power-Cord Protection
Power-supply c ords should be routed so
that they ar e not likely to be walked on or
pinched by items placed upon or against
them, paying particular attention to cords
at plugs, convenience receptacles, and
the point where they exit from the product.
9. Overloading
Do not overload wall outlets; extension
cords, or integral convenience
receptacles as this can result in a risk of
fire or electric shock.
10. Lightning
For added pr otection for this pr oduct
during storm, or when it is left unattended
and unused for long periods of time,
unplug it from the wall outlet.
This will prevent damage t o the product
due to lightning and power-line surges.
Parts Replacement
What is the difference between the DP8000 and the DP8000HB?
PROXIMA has released a new version of the DP8000 called the DP8000HB. The revised model has
higher lumen output and an improved cooling system. The DP8000HB also allows you to replace the
optical engine or the controller ECA separately rather than as a kit.
From the outside, the DP8000 and DP8000HB are identical. You must refer to the serial number label on
the bottom case to determine which model you are working on (see the table below). It is important that
you do this because many internal parts differ between the models. However, troubleshooting and parts
replacement procedures are the same for both.
Model Serial Number Prefix
DP8000 ABCxxxxxx
DP8000HB AFWxxxxxx
DP8000/8000HB Service Manual 7
Replaceable Part Hierarchy
The flow chart below shows what parts must be removed to access each replaceable part in the projector.
The parts on the first level (the lamp door, for example) are accessible without removing any other parts.
The more levels down a part is, the more parts you need to remove.
Start
Lamp door
Dust Filter
Right & Left
Rear Feet
Top Case
Lamp Module
Speakers
Keypad
IR Window and
IR ECA
Ballast
Handle &
Handle Bracket
Optical Engine
Power Supply
Elevator Actuator
Zoom Ring and
Focus Ring
Bottom Case
Interlock Switch
and Cable
Lamp Housing
Engine Blower
Thermal Switch
Controller ECA
Elevator Foot
Lamp Blower
Side Vent
92mm Lamp Fan
60mm Power
Supply Fan
80mm Engine Fan
DP8000/8000HB Service Manual 8
Remove and Replace the Lamp Door and Lamp Module
The lamp door (4009073) is located on the bottom of the projector. It covers the lamp module (DP8000:
SP-LAMP-001, DP8000HB: SP-LAMP-008). When the lamp door is shut properly, it closes an interlock
switch, which allows the lamp to strike when the projector is powered up.
1 Place the projector upside down on the work surface.
2 Loosen the captive screw that fastens the lamp door to the bottom case, then lift the door off of
the projector.
DP8000/8000HB Service Manual 9
3 Loosen the three captive screws that fasten the lamp module to the lamp housing. Then grasp
the module using the recessed handle and lift the lamp module out of the projector.
Assembly Note
♦ If you install a new lamp, you need to reset the lamp counter.
1. Turn the projector on, then press Menu on the remote control or the keypad.
2. In the Basic menu, select Setup.
3. In the Setup menu, select Service.
4. In the Service menu, select Reset Lamp timer.
DP8000/8000HB Service Manual 10
Remove and Replace the Dust Filter
The dust filter (300728) traps dust particles before they pass through the engine blower and then into the
optical engine. You can replace or clean the dust filter without disassembling the projector.
1 Place the projector upside down on the work surface.
2 Loosen the captive screw that fastens the dust filter to the bottom case. Do not remove the screw.
3 Use a small bladed screwdriver to pry the edge of the dust filter away from the bottom case. Then
pull the filter out of the bottom case.
DP8000/8000HB Service Manual 11
4 To clean the dust filter use a vacuum on the ribbed side of the filter (shown below), or blow
compressed air through the other side.
Assembly Note
♦ Insert the end opposite the captive screw into the slot in the bottom case first, then slide the filter
into position. Do not over tighten the screw.
DP8000/8000HB Service Manual 12
Remove and Replace the Rear Feet
Two rubber rear feet (4009084xx) fasten to back corner of bottom of the projector. Both feet are
adjustable, allowing the user to adjust the image so that it is level. The rear feet are also included with a
new bottom case.
1 Turn the projector upside down on the work surface.
2 To remove a damaged rear foot, turn it counter-clockwise. To install a rear foot, turn it clockwise.
Do not over tighten the foot.
DP8000/8000HB Service Manual 13
Remove and replace the Top Case and Keypad
The top case (4009070) encloses the top half of the projector. When you replace the top case, you must
adhere a new logo label, front label and rear label to the top case. All labels are available in the label
kit (401941).
Once you have removed the top case, you have access to the keypad (4008088). See step 6 below.
1 Turn the projector upside down on the work surface.
2 Remove the two M3x104 Phillips Plastite screws on the bottom case.
3 Turn the projector right side up on the work surface.
DP8000/8000HB Service Manual 14
4 Remove the eight M3x7 black Torx Plastite screws and the M3x13 black Torx screw that fasten
the top case to the projector.
5 To separate the top case from the bottom case, do the following:
Lift the top case near the projection lens.
DP8000/8000HB Service Manual 15
While holding the top case up, flex the rear of the top case below the I/O panel. Flex it just
enough to clear the I/O ports.
Once the two case halves are separate, unplug the I/R-speaker cable from its connector on the
controller ECA.
DP8000/8000HB Service Manual 16
6 Once the top case is removed, you can remove the rubberized keypad. To do this, press the keys
from the outside of the top case. To install a new keypad, press the keys and guides into the
holes in the top case.
If you are replacing the top case with a new one, remove the following items:
Speakers (see page 18)
IR ECA and window (see page 20
Assembly Notes
♦ Install the speakers, the IR ECA, the IR window, and the IR-speaker cable in the new top case.
♦ To install the top case, you need to flex the portion of the top case so the I/O panel fits into its
opening in the top case.
♦ Tighten all screws to 6 in-lbs (.7 Nm).
♦ Adhere a new logo label to the recessed area adjacent to the keypad.
♦ Adhere a new rear label to space beneath the M-1 connector on the rear of the projector. Refer
to the old top case for positioning.
♦ Adhere a new front label to the left side the front IR window. Make sure to position the label so
that it does not cover the transparent portion of the window. Refer to the old top case for
positioning.
DP8000/8000HB Service Manual 17
Remove and Replace the Speakers
There are three speakers mounted to the top case:
♦ low range speaker (505538)
♦ right speaker with a 55mm cable (506499)
♦ left speaker with a 210mm cable (506536)
The right and left speakers are identical with the exception of the cable length.
The procedure to remove and replace all three speakers is identical.
1 Remove the top case (see page 14)
2 Unplug the speaker cable from its connector on the IR ECA.
3 Remove the three M3x6 black Plastite Torx screws with captive washers that fasten the speaker
to the top case. Then remove the speaker.
DP8000/8000HB Service Manual 18
Assembly Notes
♦ If you are replacing the left speaker, make sure to route the speaker cable through the cable
guides in the top case.
♦ Torque all screws to 6 in-lbs (.68 Nm).
DP8000/8000HB Service Manual 19
Remove and Replace the IR ECA and IR Window
The IR ECA (DP8000: 308230x, DP8000HB: 308246x) and the IR window (4009077) fasten to the inside
of the top case. The IR ECA includes the IR receiver and the circuitry that carries the audio signals to the
three speakers.
1 Remove the top case (see page 14)
2 To remove the IR window, pry the hooks on either end of the IR window so that they clear the
tabs in the top case. Then remove the IR window from the outside of the case.
3 To remove the IR ECA, do the following:
Unplug the controller/IR cable and the three speaker cables from the IR ECA.
Remove the two black Plastite Torx screws and lift the ECA out of the bottom case.
Assembly Note
♦ Torque the two screws to 5 in-lbs (.55 Nm).
DP8000/8000HB Service Manual 20
Remove and Replace the Ballast
The ballast (DP8000: 300162x, DP8000HB: 525-0061-xx) provides the high voltage necessary to strike
and run the projection lamp. It receives power from the power supply. The ballast is located in the front of
the projector, adjacent to the projection lens and the lamp housing. The ballast air guide (available in the
hardware kit [410389]) fastens to the ECA portion of the ballast. It directs the flow of air over the ballast
to provide maximum cooling.
1 Remove the top case (see page 14)
2 Remove the two M3x6 black Plastite Torx screws that fasten the ballast to the lamp housing.
Note that the screws have a beveled head.
3 Remove the M3x8 black Plastite Torx screw with a captive washer that fastens the ballast to the
bottom case. The screw is located in the cavity between the lamp housing and the projection lens
barrel.
DP8000/8000HB Service Manual 21
4 Lift the end of the ballast adjacent to the lens barrel so that you can unplug the lamp sensor cable
and the ballast power cable.
CAUTION The solder points on the outside of the ballast are very sharp. Take care when you grasp
the ballast.
5 Lift the ballast out of the bottom case. You may need to flex the case outward slightly. Note that
the lamp power cable connector is fastened to the lamp housing.
6 Remove the two M3x8 black Plastite Torx screws with captive washers that fasten the lamp
power connector to the lamp housing. Then unplug the connector.
DP8000/8000HB Service Manual 22
NOTE The ballast insulator protects the outside of the ballast ECA. Make sure to replace it when
installing the ballast.
Assembly Notes
♦ If you are installing a new ballast, you need to fasten the ballast air guide to the new ballast.
You can remove the air guide from the old ballast and attach it to the new one. Or you can install
a new air guide, which is available in the hardware kit (410389).
To separate the ballast air guide and the ballast, remove the two M3x6 black Plastite Torx screws
from the right and left top corner of the ballast. Then slide the air guide off of the ballast ECA.
To install the ballast air guide, insert the two top corners of the ballast ECA into the slots in the air
guide. Then tighten the M3x6 black Plastite Torx screws to 5 in-lbs (.55 Nm).
DP8000/8000HB Service Manual 23
DP8000/8000HB Service Manual 24
♦ To install the ballast and air guide, do the following:
1. Fasten the lamp power cable connector to the lamp housing. Tighten the two black
M3x8 Plastite Torx screws with captive washers to 5 in-lbs (.55 Nm). Do not over
tighten the screws.
2. Make sure the lamp power cable emerges from the end of the ballast and is then
routed through the slot in the air guide flange that fits over the lamp housing.
DP8000/8000HB Service Manual 25
3. Lower the ballast into the bottom case. You may need to flex the case outward
slightly to clear the ballast. Make sure that each end of the ballast fits into the
alignment slots in the bottom case.
4. Route the lamp sensor and ballast power cables beneath the cable clip adjacent to
the M3x8 black Plastite Torx screw with a captive washer. Then tighten the screw
to 8 in-lbs (.95 Nm)
5. Tighten the two black M3x6 Plastite Torx screws that fasten the ballast to the lamp
housing to 5 in-lbs (.55 Nm).
DP8000/8000HB Service Manual 26
Remove and Replace the Handle
The handle (4009081) fastens to the side of the bottom case adjacent to the engine blower fan. The
handle is held in place by the handle bracket and handle pins, both of which are available in the
hardware kit (410389)
1 Remove the top case (see page 14)
2 Remove the M3.5x10 black Torx screw that fastens the handle bracket to the bottom case.
3 Lift both ends of the handle up so that the handle pins disengage from the slots in the bottom
case.
Assembly Note
♦ To install the handle, insert the handle pin into the hole in the handle bracket. While holding the
bracket in place, press the pins into their slots in the bottom case.
♦ Torque the M3.5x10 Torx screw to 8 in-lbs (.95 Nm).
DP8000/8000HB Service Manual 27
Remove and Replace the Engine Blower
The engine blower (DP8000: 300732, DP8000HB: 505-1436-xx) is located in the front of the projector
adjacent to the projection lens barrel. It draws outside air through the dust filter and blows cool air into the
optical engine.
1 Remove the top case (see page 14)
2 Disconnect the blower power cable from the controller ECA (see step 3 below).
3 Remove the two black M3.5x10 Plastite Torx screws that fasten the blower to the bottom case.
The screws are located in the cavity between the projection lens and the blower.
DP8000/8000HB Service Manual 28
4 Lift the front of the blower out of the bottom case first, then slide the blower duct out of the
engine.
Assembly Note
♦ Insert the blower duct into the engine first, then lower the rest of the blower into the bottom case.
Make sure the blower seats properly in the bottom case. There are two spacers that fit into
recesses in the screw holes. Torque the two screws to 5 in-lbs (.55 Nm).
DP8000/8000HB Service Manual 29
Remove and Replace the Thermal Switch
The thermal switch (301572xx) is located on the top of the lamp housing. If the temperature in the
housing becomes too high, the switch opens, shutting down the projector.
To check the thermal switch
When a projector shuts down after operating for a few minutes, you need to check the thermal switch
operation. First, power up the projector with the top off. Let the projector run until it shuts down. Measure
the resistance at the cable connections. If the resistance is infinity (open), replace the thermal switch.
1 Probe the connections indicated below:
DP8000/8000HB Service Manual 30
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