InFocus 900 Series User manual

900 Series Service Guide
010-0319-00

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.

LP900 Series Service Manual 3
Table of Contents
Table of Contents.......................................................................................................... 3
Safety Precautions ........................................................................................................ 4
Important Precautions .................................................................................................. 4
Important Safety Instructions ...................................................................................... 5
Parts Replacement ........................................................................................................ 7
Adjusting the optional ultra wide angle lens................................................................. 7
Bottom case............................................................................................................... 10
ECA stack.................................................................................................................. 13
Elevator assembly ..................................................................................................... 16
Exhaust fan assembly................................................................................................ 18
Filter tray.................................................................................................................... 21
Focus and zoom rings ............................................................................................... 22
Front bezel................................................................................................................. 24
IR assembly and IR window ...................................................................................... 26
Keypad assembly ...................................................................................................... 28
Lamp module............................................................................................................. 29
Projection lens ........................................................................................................... 31
Optical engine............................................................................................................ 34
Power supply ............................................................................................................. 38
Rear bezel ................................................................................................................. 43
Speakers ................................................................................................................... 45
Top case.................................................................................................................... 47
Software ....................................................................................................................... 49
Download the software .............................................................................................. 49
Install the software on the computer .......................................................................... 50
Upgrade the software through the CableWizard 2..................................................... 51
Functional Tests.......................................................................................................... 58
Troubleshooting.......................................................................................................... 62
Parts Lists.................................................................................................................... 76
FRUs by alphabetic listing ......................................................................................... 76
FRUs by numeric listing............................................................................................. 80
Parts list - Fasteners.................................................................................................. 84
Standard Accessories................................................................................................ 85

The lightning flash with arrowhead
symbol, within an equilateral triangle,
is intended to alert the user to the
presence of uninsulated "dangerous
voltage" within the product's
enclosure that may be of sufficient
magnitude to constitute a risk of
electric shock to persons.
The exclamation point within an
equilateral triangle is intended to
alert the user to the presence of
important operating and
maintenance (servicing) instructions
in the literature accompanying the
appliance.
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS
APPLIANCE TO RAIN OR MOISTURE. DANGEROUS HIGH VOLTAGES ARE
PRESENT INSIDETHE ENCLOSURE. DO NOT OPEN THE CABINET. REFER
SERVICING TO QUALIRED PERSONNEL ONLY.
CAUTION: Laser beam is emitted when the laser button of the remote control is pressed. Do not
look from the front of the remote control. Do not face toward a person or to a mirror.
FCC Radio Frequency Interference Statement
Note: This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to
provide reasonable protection 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 installed and used in accordance with the
instruction manual, may cause harmful interference to radio communications.
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 interference at his
own expense.
WARNING: Changes or modifications made to this equipment, not expressly approved by
Toshiba, or parties authorized by Toshiba, could void the user's authority to operate
the equipment.
Notice: This Class A digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe A est conforme à la norme NMB-003 du
Canada.
IMPORTANT PRECAUTIONS
Save Original Packing Materials
The original shipping carton and packing materials will come in
handy if you ever have to ship your LCD projector. For maximum
protection, repack the set as it was originally packed at the factory.
Avoid Volatile Liquid
Do not use volatile liquids, such as an insect spray, near the unit.
Do not leave rubber or plastic products touching the unit for a long
time. They will mar the finish.
Moisture Condensation
Never operate this unit immediately after moving it from a cold
location to a warm location. When the unit is exposed to such a
change in temperature, moisture may condense 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.
In the spaces provided below, record the Model and Serial No. Iocated
at the rear of your LCD projector.
ModeNo. SerialNo.
Retain this information for future reference.
SAFETY PRECAUTIONS
TDP-T1 /TDP-S2ServiceManual

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 manufactured
to assure personal safety. Improper use can
result in electric shock or fire hazard. The
safeguards incorporated in this unit will protect
you if you observe the following procedures for
installation, use 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 protect 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 products
(including amplifiers) that produce 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 product 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 cords should be routed so
that they are 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 protection for this product
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 to the product
due to lightning and power-line surges.
TDP-T1 /TD

IIIIII
11. Object and Liquid Entry
Never push objects of any kind into this
product through openings as they may
touch dangerous voltage points or short-out
parts that could result in a fire or electric
shock. Never spill liquid of any kind on the
product.
12. Do not place the product vertically
Do not use the product in the upright
position to project the pictures at the
ceiling, or any other vertical positions.
It may fall down and dangerous.
13. Stack Inhibited
Do not stack other equipment on this
product or do not place this product on the
other equipment.
Top and bottom plates of this product
develops heat and may give some
undesirable damage to other unit.
14. Attachments
Do not use attachments not recommended
by the product manufacturer as they may
cause hazards.
15. Accessories
Do not place this product on an unstable
cart, stand, tripod, bracket, or table. The
product may fall, causing serious injury to a
child or adult, and serious damage to the
product. Use only with a cart, stand, tripod,
bracket, or table recommended by the
manufacturer, or sold with the product. Any
mounting of the product should follow the
manufacturer's instructions and should use
a mounting accessory recommended by the
manufacturer.
A product and cart combination should be
moved with care. Quick stops, excessive
force, and uneven surfaces may cause the
product and cart combination to overturn.
IMPORTANT SAFETY INSTRUCTIONS
16. Damage Requiring Service
Unplug this product from the wall outlet and
refer servicing to qualified service
personnel under the following conditions:
a) When the power-supply cord or plug is
damaged.
b) If liquid has been spilled, or objects have
fallen into the product.
c) If the product has been exposed to rain or
water.
d) If the product does not operate normally by
following the operating instructions. Adjust
only those controls that are covered by the
operating instructions as an improper
adjustment of other controls may result in
damage and will often require extensive
work by a qualified technician to restore the
product to its normal operation.
e) If the product has been dropped or
damaged in any way.
f) When the product exhibits a distinct change
in performance - this indicates a need for
service.
17. Servicing
Do not attempt to service this product
yourself as opening or removing covers
may expose you to dangerous voltage or
other hazards. Refer all servicing to
qualified service personnel.
18. Replacement Parts
When replacement parts are required, be
sure the service technician has used
replacement parts specified by the
manufacturer or have the same
characteristics as the original part.
Unauthorized substitutions may result in
fire, electric shock, or other hazards.
(Replacement of the lamp only should be
made by users.)
19. Safety Check
Upon completion of any service or repairs
to this product, ask the service technician to
perform safety checks to determine that the
product is in proper operating condition.
IMPORTANT SAFETY INSTRUCTIONS

LP900 Series Service Manual 7
Parts Replacement
Adjusting the optional ultra wide angle lens
You adjust the image cast through the ultra-wide angle lens to match a specific rear projection screen
size. The ultra-wide angle lens is not compatible with the LP925.
To make this adjustment, the projector must be mounted in the rear projection mechanism. The projector
should be plugged into a power source. All other adjustments, including image size and basic focus must
be made before adjusting the lens.
NOTE For clarity some pictures show the top case removed. You can reach all the screws with the top
case in place. The projector will not operate with the top case removed.
1 Remove the front bezel (see page 24).
2 Turn the keystone adjustment knob clockwise until the lens tilts all the way down.

LP900 Series Service Manual 8
3 Use the 3mm ball head hex wrench (included with the lens) to loosen the two focus ring mounting
screws. Do not remove the screws. They only need to be loose enough to adjust the focus ring.
4 Use the 3mm ball head hex wrench to loosen the two plane correction ring mounting screws. Do
not remove the screws. They only need to be loose enough to adjust the ring.
5 Power up the projector.

LP900 Series Service Manual 9
6 Rotate the focus ring and the resolving plane correction ring to adjust the image.
The image should be sharp across the entire screen.
7 Tighten the four screws.

LP900 Series Service Manual 10
Removing and replacing the bottom case
The bottom case (LP920: 505-0675-xx; LP925, LP930: 505-0854-xx) encloses the bottom half of the
projector. When you replace the bottom case, you must first remove all the FRUs in the old case, then
install them in the new bottom case. You also need to install a certification label (IOpen 920: 020-1011-xx;
LP920: 020-1000-xx; LP925: 020-1071-xx; LP930: 020-1068-xx) on the new bottom case.
1 Remove the following items:
Front bezel (see page 24)
Rear bezel (see page 43)
Top case (see page 47)
Exhaust fan assembly (see page 18)
Speakers (see page 45)
ECA stack (see page 13)
Optical engine (see page 34)
Power supply (see page 38)
Elevator assembly (see page 16)
2 Use a tweezers or small flat bladed screwdriver to remove the two case retainer slides (340-
0660-xx) from each side of the bottom case. Insert the tweezers or screwdriver blade between
the slide and the bottom case. Gently pry the center portion of the slide away from the bottom
case while pulling the slide toward the front of the projector. Save the case retainer slides. You'll
need them for the new bottom case.

LP900 Series Service Manual 11
3 Remove the front bezel bracket from the bottom case. To do this, use a T-10 Torx driver to
remove the M3x8 screws that fasten the bracket to the bottom case. Save the bracket. You'll
need to install it in the new bottom case.
4 Use a hair drier or heat gun to loosen the serial number label (shown below). Don't use too much
heat. Then carefully peel it off of the certification label. You will reuse the serial number label
when you install the new bottom case.

LP900 Series Service Manual 12
Assembly Notes
♦ Install the front bezel bracket (removed in step 3 above) in the new bottom case.
♦ Attach a new certification label to the recessed area on the outside of the bottom case. Then attach
the serial number label to the new certification label.
♦ In the illustration below, the certification is the larger label. The smaller serial number label is circled.
♦ To replace the case retainer slides (removed in step 2 above) in the bottom case, position each slide
with the handle toward the front of the projector. Make sure that the latch tabs face upward and that
the slots in the slide fit between the front pair of tabs in the bottom case. Then move the slide toward
the rear of the projector to lock the slide in place in the bottom case.

LP900 Series Service Manual 13
Removing and replacing the ECA stack
The ECA stack (LP920, IOpen 920: 526-0068-xx; LP925, LP930: 526-0068-xx) consists of the I/O ECA,
controller ECA, I/O shield and I/O bezel. The I/O shield and I/O bezel fasten to the ECA stack with two
screws. The I/O ECA attaches directly to the controller ECA with fasteners and a connector. The
controller ECA is positioned above the I/O ECA in a stack. The ECAs are not available separately.
The ECA stack attaches to the top sides of the power supply and optical engine.
1 Remove the following items:
Front bezel (see page 24)
Rear bezel (see page 43)l
Top case (see page 47)
Exhaust fan assembly (see page 18)
2 Unplug the cables from the following connectors on the controller ECA:

LP900 Series Service Manual 14
3 Use a T-10 Torx driver to remove the nine M3x8 Torx screws that attach the ECA stack to the
power supply and optical engine.
4 Carefully lift the ECA stack upward to disengage connectors on the bottom side of the controller
ECA from the optical engine and power supply.
The connectors locations are shown below.
5 Lift the ECA stack away from the projector.

LP900 Series Service Manual 15
Assembly Notes
♦ Make certain that the two connectors on the bottom side of the controller ECA align properly with the
connectors on the optical engine and power supply. Then press the controller down to engage the
connectors.
♦ Fasten the ECA stack to the optical engine and power supply with the M3x8 screws. Tighten the
screws to 4 in.-lbs. (.452 Nm)
♦ Make certain that all nine cables are reconnected to the controller ECA.
♦ After reassembling the projector, make certain that you upgrade the projector software (see page 52).

LP900 Series Service Manual 16
Removing and replacing the elevator assembly
The elevator assembly (505-0647-xx) is comprised of four pieces: a housing, the elevator shaft and two
springs, the elevator actuator, and the elevator button. The rubber foot (505-0649-xx) at the bottom of the
elevator shaft supports the front of the projector in desktop applications. The elevator button presses onto
the end of the spring-loaded actuator and extends through the front bezel. It is not necessary to remove
the elevator from the projector to replace the rubber foot.
The elevator fastens to the inside of the bottom case.
1 Fully extend the elevator to unload the spring tension from the elevator shaft.
2 Remove the bottom case (see page 10).
3 With the bottom case upside-down on the bench, use a #1 Phillips screwdriver driver to remove
the black M3x5 screw from the rubber foot at the end of the elevator shaft.
4 Use a T-10 Torx driver to remove the four M3x8 Torx screws from the elevator housing on the
inside of the bottom case.
5 Lift the elevator assembly out of the bottom case.

LP900 Series Service Manual 17
Assembly Notes
♦ Position the elevator so that the actuator faces the front of the projector before you insert the end of
the elevator shaft through the hole in the bottom case.
♦ Fasten the elevator to the bottom case with the M3x8 screws. Tighten the screws to 4 in.-lbs. (.452
Nm).
♦ Make sure to replace the elevator button at the end of the actuator before you reassemble the
projector.
♦ After you've replaced the elevator, replace the rubber foot. Then fully retract the elevator to prevent
damage to the elevator shaft.

LP900 Series Service Manual 18
Removing and replacing the exhaust fan assembly
The exhaust fan assembly (LP920, IOpen 920: 505-0679-00; LP925, LP930: 505-0679-01) consists of the
exhaust fan and exhaust fan bracket in which the faNmounts. The assembly is located at the rear of the
projector inside of the rear bezel. It is held in place between the bottom and top cases without fasteners.
The fan exhausts hot air generated by the lamp module.
1 Remove the following items:
Front bezel (see page 24)
Rear bezel (see page 43)
Top case (see page 47)
2 Use a T-10 Torx driver to remove the two M3x8 Torx screws from the option card baffle and lift it
away from the projector. Save the option card baffle. You'll need to replace it after you replace
the exhaust fan assembly.
3 Unplug the exhaust fan cable from the controller ECA at connector J500.

LP900 Series Service Manual 19
4 Lift the tab that holds the interlock switch in position on the exhaust fan bracket and slide the
interlock switch out of the recess on the bracket.

LP900 Series Service Manual 20
5 Lift the exhaust fan assembly from the bottom case.
Assembly Notes
♦ Position the exhaust fan assembly so that it rests in the guide slots in the bottom case.
♦ Slide the interlock switch into the recess in the exhaust fan bracket. The tab on the bracket snaps
over the switch to hold it in position.
♦ Connect the exhaust fan cable to the controller ECA at J500.
♦ Replace the option card baffle making sure that the tab at the rear of the baffle properly engages the
slot at the top center of the exhaust fan assembly.