Eiki LC-XT6 User manual

* Projection lens is optional.
Multimedia Projector
SERVICE MANUAL
Model No. LC-XT6
US, Europe
FOREWORD
For your convenience, all service parts, identified in this manual are available through Eiki’s normal distribution channels.
In addition to service part number, the generic descriptions have been given, where possible, to allow your service
technicians to substitute equivalent components which might be available from other sources.
All orders for service parts will be honored. However, in instances where generic components are considered to be
available from several common sources, as would be the case with an industry standard fuse, resistor, or semicon-
ductor, it may be more economical and expeditious to purchase the part locally.
(2 012 -11) REFERENCE NO. SMA1211008E-00

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Contents
SERVICE MANUAL ................................................... 1
Contents ........................................................................ 2
Safety Instructions......................................................... 3
Safety Precautions ..........................................................3
Product Safety Notice .....................................................3
Service Personnel Warning.............................................3
Specifications ................................................................ 5
Circuit Protections ....................................................... 10
Fuses (F601, F602, F603).............................................10
Thermal fuses (SW903, SW904, SW905, SW906)....... 11
Temperature sensors, wind sensors .............................12
Power failure, fan lock and filter error detection ............ 13
Maintenance................................................................ 14
Maintenance.................................................................. 14
Replacing the unit.......................................................... 14
Air filter unit ................................................................... 14
Lamp unit....................................................................... 17
Quick maintenance .......................................................21
Cleaning the optical parts..............................................22
Security Function Notice ............................................. 23
Lens Mounting............................................................. 24
Mechanical Disassembly............................................. 32
Order of mechanical disassembly.................................32
Optical Parts Disassembly .......................................... 51
Order of optical parts disassembly................................ 51
Servicing Notice .......................................................... 65
Note on main board replacement..................................65
Adjustment data setting.................................................65
Serial number setting ....................................................65
Model no. setting...........................................................65
Adjustments................................................................. 66
Adjustments after parts replacement ............................66
Optical Adjustments .................................................... 67
Optical adjustment location...........................................67
Before adjustment .........................................................68
1. Optical center adjustment..........................................70
2. PBS adjustment......................................................... 74
3. Contrast adjustment .................................................. 75
4. Back focus adjustment .............................................. 76
5. Convergence adjustment ..........................................77
Adjustment tool installation ...........................................78
Adjustment tool removal................................................79
Adjustment ....................................................................80
Electrical Adjustments................................................. 81
Service adjustment menu operation .............................81
Circuit adjustments........................................................82
Test points and locations...............................................86
Service adjustment data................................................87
Chassis Description .................................................. 158
Chassis over view........................................................158
Boards connection ...................................................... 159
Troubleshooting......................................................... 160
No picture .................................................................... 160
No Power.....................................................................164
Power supplies to boards ............................................ 165
AC filter, AC-DC power board...................................... 166
DC power board .......................................................... 167
PFC-1 & PFC-2 board .................................................168
Power supply and power failure detection................... 169
Power drive and power failure signals......................... 172
Fan control system ...................................................... 173
Motor control system ................................................... 174
Temperature abnormality ............................................ 175
Lamp abnormality........................................................ 176
Lamp control system ................................................... 177
Power failure detection system ................................... 178
Error history log ........................................................... 179
Diagnosis of power failure with serial port...................180
Indicators and projector condition ............................... 181
Serial Control............................................................. 185
Serial control interfaces...............................................185
Control Port Functions............................................... 188
IC Block Diagrams..................................................... 191
Exploded Views & Parts List ..................................SPL-1
Exploded Views..................................................... SPL-2
Mechanical Parts List .......................................... SPL-20
Electrical Parts List...............................................SPL-23
Schematic Diagram & Circuit Board Diagram........ DIA-1
Pin description of diode, transistor and IC ...............DIA-2
Schematic Diagram ................................................DIA-3
Circuit Board Diagram .......................................... DIA-15

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Safety Instructions
WARNING:
The chassis of this projector is isolated (COLD) from AC line by using the converter transformer. Primary side
of the converter and lamp power supply unit circuit is connected to the AC line and it is hot, which hot circuit is
identified with the line ( ) in the schematic diagram. For continued product safety and protection of per-
sonnel injury, servicing should be made with qualified personnel.
The following precautions must be observed.
Safety Precautions
1: An isolation transformer should be connected in
the power line between the projector and the AC
line before any service is performed on the projec-
tor.
2: Comply with all caution and safety-related notes
provided on the cabinet back, cabinet bottom, inside
the cabinet or on the chassis.
3: When replacing a chassis in the cabinet, always
be certain that all the protective devices are
installed properly, such as, control knobs, adjust-
ment covers or shields, barriers, etc.
DO NOT OPERATE THIS PROJECTOR WITHOUT
THE PROTECTIVE SHIELD IN POSITION AND PR
OPERLY SECURED.
4: Before replacing the cabinet cover, thoroughly
inspect the inside of the cabinet to see that no stray
parts or tools have been left inside.
Before returning any projector to the customer, the
service personnel must be sure it is completely safe
to operate without danger of electric shock.
Service Personnel Warning
Eye damage may result from directly viewing the light produced by the Lamp used in this equipment. Always
turn off Lamp before opening cover. The Ultraviolet radiation eye protection required during this servicing.
Never turn the power on without the lamp to avoid electric-shock or damage of the devices since the stabilizer
generates high voltages (15kV - 25kV) at its starts.
Since the lamp is very high temperature during units operation replacement of the lamp should be done at least
45 minutes after the power has been turned off, to allow the lamp cool-off.
Product Safety Notice
Product safety should be considered when a component replacement is made in any area of the projector.
Components indicated by mark !in the parts list and the schematic diagram designate components in which
safety can be of special significance. It is, therefore, particularly recommended that the replacement of there
parts must be made by exactly the same parts.

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<PT-FW430U/PT-FW430E/PT-FW430EA/PT-FX400U/PT-FX400E/PT-FX400EA>
1. Safety Precautions
1.1. General Guidelines
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.
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 0.75mA 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.
- 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.
4
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 direct-eye 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.
Fig. 1 Fig. 2
Table. 2
4
Safety Instructions

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Specifications
Model No. LC-XT6
Power supply AC 200 V - 240 V 50 Hz/60 Hz
Power consumption
200 V - 240 V 11 A 1 850 W
When [Lamp power] in the [Setting] menu is set to eco-mode: 1 450 W
Standby: 18 W
LCD panel
Size 4.57 cm (1.8”) (aspect ratio 4:3)
Display sys-
tem Three transparent LCD panels (RGB)
Drive system Polysilicon TFT active matrix system
Number of
pixels 786 432 pixels (1 024 x 768 dots) x 3 panels
Luminous lamp 380 W UHM lamp x 4
Light output 16 000 lm (when [lamp select] is set to [4-Lamps] and [Lamp power] is set to stan-
dard)
Image signals that can be pro-
jected Refer to “List of compatible signals”
Color system Six standards (NTSC/NTSC4.43/PAL/PAL-N/PAL-M/SECAM)
Screen size 1.02 m (40”) – 15.24 m (600”)
Screen aspect ratio 4:3
Projection method Front / Rear / Mount on Ceiling / Floor (Menu setting system)
Contrast ratio 2 500:1 (when setting [Lamp power] to auto, and [Advanced color] to [Auto])
Terminals
INPUT 1
DVI-D input
terminal
1 set, DVI-D 24 p
Digital signal TMDS (Transition Minimized Differential Signaling)
HDMI input
terminal 1 set, HDMI 19 pin (HDCP, Deep color compliant)
COMPUTER
input terminal
1 set (D-sub 15 p (female))
RGB signal 0.7 V [p-p] 75Ω(G-SYNC: 1.0 V [p-p] 75Ω)
HD/SYNC TTL high impedance, automatic positive/neg-
ative polarity compatible
VD, TTL high impedance, automatic positive/negative
polarity compatible
INPUT 2
Analog RGB
input terminal
1 set (BNC 5 p)
RGB signal 0.7 V [p-p] 75Ω(G-SYNC: 1.0 V [p-p] 75Ω) HD/SYNC
TTL high impedance, automatic positive/negative polar-
ity compatible
VIDEO signal 1.0 V [p-p] 75Ωnegative sync
Y PB/CBPR/CRsignal Y: 1.0 V [p-p] negative sync, PB/CB: 0.7 V [p-p] 75Ω, PR/
CR: 0.7 V [p-p] 75Ω
S-VIDEO input
terminal 1 set, Mini DIN 4 p Y 1.0 V [p-p], C 0.286 V [p-p] 75ΩS1 signal compliant
Serial input terminal D-Sub 9 p 1 set, RS-232C-compatible computer control
USB terminal (used by
service personnel) US connector (1 set, series B)
Wired remote control Mini jack
LAN terminal 1 set, RJ-45 for network connection, PJLink compliant, 10Base-T/100Base-TX
The following table describes the specifications of the projector.

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Specifications
Model No. LC-XT6
Power cable length 3.0 m (118-1/8”)
Outer case Molded plastic
Dimensions Width: 650 mm (25-5/8”) Height: 349 mm (13-3/4”) (feet fully retracted)
Depth: 815 mm (32-1/8”) (feet fully retracted, not including lens)
Weight Approx. 46.5 kg (102.5 lbs.)
Operating environment Operating environment temperature*1: 5°C (41°F) to 40°C (104°F)
Operating environment humidity: 20% to 80% (no condensation)
Remote
control
Power supply DC 3 V (AAA battery x 2)
Operating range Approx. 5 m (196-7/8”) (within 30º in each direction)
Weight 102 g (3.6 ozs.) (including batteries)
Dimensions Width: 48 mm (1-7/8”) Height: 27 mm (1-1/8”) Depth: 145 mm (5-3/4”)
*1: The operating environment temperature may differ depending on the type of air filter used and when using the projector at
high elevations.
• The product numbers of accessories and separately sold components are subject to change without notice.

-7-
Specifications
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6;*$ [   
6;*$ [   
6;*$ [   
6;*$ [   
6;*$ [   
6;*$ [   
6;*$ [   
6;*$ [   
6;*$ [L   
6;*$ [L   
6;*$ [   
6;*$ [   

-8-
Specifications
7HFKQLFDO,QIRUPDWLRQ
(1*/,6+
$SSHQGL[
6FUHHQGLVSOD\ 5HVROXWLRQ 6FDQQLQJIUHTXHQF\ 'RWFORFN
PRGH GRWV +RUL]RQWDON+] 9HUWLFDO+] IUHTXHQF\0+]
6;*$ [   
6;*$ [L   
6;*$ [   
6;*$ [   
6;*$ [   
6;*$ [   
6;*$ [   
6;*$ [   
6;*$ [   
6;*$ [   
6;*$ [   
0$& [   
0$& [   
0$& [   
:;*$ [   
:;*$ [   
:;*$ [   
:;*$ [   
:;*$ [   
:;*$ [   
:;*$ [   
:;*$ [   
:;*$ [   
:;*$ [   
:;*$ [   
:;*$ [   
:;*$ [   
:;*$ [   
:;*$ [   
:;*$ [   
:;*$ [   
:8;*$ [   
:8;*$ [   
:6;*$ [   
:;*$ [   
:;*$ [   
8;*$ [   
8;*$ [   
8;*$ [   
8;*$ [   
8;*$ [   
S [   
S [   
L [L   
L [L   
[L   
S
[   
[   
[   
[   
[   
SVI [   
SVI [   
SVI [   
 7KH³L´DIWHUWKHUHVROXWLRQLQGLFDWHVDQLQWHUODFHGVLJQDO
 1RWFRPSDWLEOHZLWK>7UXH@LQ>6FUHHQ@

-9-
Specifications
7HFKQLFDO,QIRUPDWLRQ
(1*/,6+
$SSHQGL[
■:KHQWKHVLJQDOLVGLJLWDO
6FUHHQGLVSOD\ 5HVROXWLRQ 6FDQQLQJIUHTXHQF\ 'RWFORFN
PRGH GRWV +RUL]RQWDON+] 9HUWLFDO+] IUHTXHQF\0+]
'9*$ [   
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-10-
This projector provides the following circuit protections to operate in safety. If the abnormality occurs inside the pro-
jector, it will automatically turn off by operating one of the following protection circuits.
Circuit Protections
Fuses are located inside of the projector. If all the indicators are not lighting,
the fuse (F602) may be opened. If the STAND-BY indicator is lighting and
others are blinking, one of the fuses (F601, F603) may be opened. If fuse
(F601. F603) opens, the power supply to the LAMP1/LAMP2, or LAMP3/
LAMP4 will be cut off.
Check the fuses as following steps.
The fuses should be used with the following type;
Location : F601 / F603
Fuse Part No. : K5E802BZA003
TYPE 8.0A 250V FUSE
0215008.MXEP, LITTEL
How to replace the fuses
1. Remove the cabinet top, main board, PFC/Ballast box1-2
following to "Mechanical disassembly".
2. Remove the fuses F601, F602 and F603 on the AC filter
board.
To install the fuses, take reversed step in the above.
Fuses (F601, F602, F603)
F603
F602 F601
Location : F602
Fuse Part No. : K5E632BZA003
TYPE 6.3A 250V FUSE
021506.3MXEP, LITTEL
AC filter board