Mitsubishi SD200U User manual

LCD PROJECTOR
DLP1 CHASSIS
CAUTION
Before servicing this chassis, it is important that the service person reads the “SAFETY PRECAUTIONS” and “PRODUCT
SAFETY NOTICE” in this service manual.
SPECIFICATIONS
2002
MITSUBISHI
• Power Input
• Rated Input
• LCD Panel
• Colors
• Projection Lens
• Light Source Lamp
• Picture Size
• PC Compatibility
• Video Compatibility
• Audio Output
• Speaker
• S-Video Input
• Video Input
• Audio Input
• Analog RGB Input
(Mini D-SUB 15P)
• Control Connector
• Cabinet Dimensions
• Weight
• Length of Power Cord
• Temperature,Humidity
(performance guarantee)
: AC 100~240 V ; 50 / 60 Hz
: 2.8 A
: 0.7 inch DMD device: 1 piece
[SD200U]
Pixels 800 ×600= 480,000 pixels
[XD200U]
Pixels 1,024 ×768= 786,432 pixels
: 16,770,000 colors
: F 2.5~3.0 f = 23.2~28.4 mm
: 210 W NSH
: aspect ratio 4:3 40~300 inch
: [SD200U]
Resolution: 640x400-800x600+Compressed
1024x768
[XD200U]
Resolution: 640x400-1024x768+Compressed
1280x1024
Sync on Green available
: NTSC/NTSC4.43/PAL(including PAL-
M,N)/SECAM, PAL-60 DVD
(Component)/HDTV(1080i)/720p/(525p)
: 2W mono
: 1.57”(4cm) round type (8 Ω2W), 1 pc.
: Luminance signal: 1.0 V(p-p) 75 Ω(negative sync.)
Chroma signal: 0.286 V(p-p) 75 Ω(burst signal)
: 1.0 V(p-p) 75 Ω(negative sync.)
: 350 mV(rms), 10 kΩor more
: RGB: 0.7 V(p-p) 75 Ω
YCBCR: 1.0 V (p-p) (Y) (negative sync.)
CBCR: 0.7 V (p-p)
HD/CS: TTL level (positive or negative)
VD: TTL level (positive or negative)
: Serial(Mini DIN 9 pin female connector) RS-
232C standards
: 11.8”(W) ×3.5”(H) ×9.6”(D)
(300 ×90 ×245 mm)
(Legs are not included.)
: Approx. 6.6 lbs. (3 kg)
: 114 inch (2.9 m)
:41°F (5°C) to 95°F (35°C) ,
30 to 90%
•Weight and dimensions shown are approximate.
•Design and specifications are subject to change without notice.
MITSUBISHI ELECTRIC
Copyright C2002 Mitsubishi Electric Corporation All Rights Reserved.
MODEL
SD200U/XD200U

CONTENTS
– FILE “COVERPGE” –
SPECIFICATIONS ···································································································································· 1
CONTENTS ··········································································································································· 2
–FILE “EXPOSED”–
TRADEMARK, REGISTERED TRADEMARK ·························································································· 1
PRODUCT SAFETY NOTICE ·················································································································· 1
SAFETY PRECAUTIONS························································································································· 2
PCBs LOCATION ····································································································································· 3
EXPOSED VIEW ······································································································································ 4
DISASSEMBLY ········································································································································ 8
REMOVAL OF LAMP ······························································································································· 14
LEAD DRESS··········································································································································· 15
PACKING·················································································································································· 17
–FILE “MAINTENA”–
LAMP REPLACEMENT···························································································································· 1
MAINTENANCE ······································································································································· 2
SERVICE COMMANDS ··························································································································· 2
FUNCTION MENU (SETTING MENU ONLY FOR SERVICE) ································································· 3
LIFE TIME OF THE CONSUMABLE PARTS ··························································································· 3
REPLACEMENT OF MAIN PCB ASSY···································································································· 4
DOWNLOAD OF THE FIRMWARE·········································································································· 5
HOW TO USE THE VIDEO MODE ·········································································································· 6
ABOUT LASER BEAM ····························································································································· 7
–FILE “ELCTADJ”–
ELECTRICAL ADJUSTMENTS················································································································ 1
–FILE “DIAGNO”–
DIAGNOSIS INFORMATION···················································································································· 1
DIAGNOSTIC SOFTWARE, TO READ WARNING HISTORY (PCGC8 Ver.2)······································· 4
SPECIFICATION OF RGB SIGNALS IN EACH COMPUTER MODE OF THE PROJECTOR ······························ 6
–FILE “DIAGFLOW”–
DIAGNOSIS FLOW CHART····················································································································· 1
–FILE “PARTSLST”–
PARTS LIST ··········································································································································· 1

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1 -
Many electrical and mechanical parts in the DLP PROJECTOR have special safety related characteristics.
These characteristics are often not evident from visual inspection nor can the protection afforded by them
necessarily be obtained by using replacement components rated for higher voltage, etc. Replacement parts
which have these special safety characteristics are identified in this service manual. Electrical components
having such features are identified by shading on the schematic diagram and the parts list of this service
manual and by the supplementary sheet for this chassis to be issued subsequently.
PRODUCT SAFETY NOTICE
TRADEMARK, REGISTERED TRADEMARK
Apple, Macintosh are registered trademarks of Apple Computer Inc.
IBM, VGA, PS/2 are trademarks or registered trademarks of International Business Machines Corporation.
Microsoft Windows 95/98/Me are either registered trademarks or trademarks of Microsoft Corporation in the
United States and/or other countries.
Space Pointer is registered trademarks of ALPS ELECTRIC CO., LTD.
Other brand or product names are trademarks or registered trademarks of their respective holders.

-
2 -
SAFETY PRECAUTIONS
NOTICE: Observe all cautions and safety related notes located inside the cabinet and on the chassis.
WARNING
1. Operation of this LCD PROJECTOR outside the cabinet or with the cover removed presents a shock hazard from the
LCD PROJECTOR power supplies.
2. When a short-circuit has occurred, replace those components that indicate evidence of overheating.
3. Grounding circuit continuity is vital for safe operation of equipment. Do not remove ground connection while the
power cord is still connected to the supply. Disconnect supply before servicing.
LEAKAGE CURRENT CHECK
Before returning the LCD PROJECTOR to the customer, it is recommended that leakage current be measured
according to the following methods.
1. Cold Check
With the AC plug removed from the AC source, place a jumper across the two AC plug prongs. Turn the LCD
PROJECTOR AC switch on. Using an ohm-meter, connect one lead to the AC plug and touch the other lead to each
exposed metal part (metal cabinet, screwheads, metal overlays, etc.), particularly any exposed metal part having a
return path to the chassis. Exposed metal parts having a return path to the chassis should have a minimum
resistance reading of 1 megohm. Any resistance below this value indicates an abnormality which requires corrective
action. Exposed metal parts not having a return path to the chassis will indicate an open circuit.
2. Hot Check
Use the circuit in Fig. 1 to perform this test.
(1) With switch S1 open, connect the LCD PROJECTOR to the measuring circuit. Immediately after connection,
measure the leakage current using both positions of switch S2, and with the switching devices in the LCD
PROJECTOR in all of their operating positions.
(2) Switch S1 is then closed, energizing the LCD PROJECTOR. Immediately after closing the switch, measure the
leakage current using both positions of switch S2, and with the switching devices in the LCD PROJECTOR in
all of their operating positions. Current measurements of items (1)and (2) are to be repeated after the LCD
PROJECTOR has reached thermal stabilization. The leakage current must not be more than 0.5 milliampere.
V
S1
S2
AC source
GH
(Grounding)
Open
Grounding Supply Conductor B
Insulating Table
LCD PROJECTOR
A
AC Milliammeter
Figure 1
Europe, Other than USA
NOTICE: Observe all cautions and safety related notes located inside the cabinet and on the chassis.
WARNING
1. An isolation transformer should be used between the projector and the AC supply point before any test/service is
performed on a LIVE chassis projector.
2. Operation of this projector outside the cabinet or with the cover removed, involves a shock hazard from the projector
power supplies. Work on the projector should not be attempted by anyone who is not thoroughly familiar with
precautions necessary when working on high voltage equipment.
3. When service is required, observe the original lead dressing. Extra precaution should be given to assure correct lead
dressing in the high voltage area. Where a short-circuit has occurred, replace those components that indicate
evidence of overheating.
LEAKAGE CURRENT COLD CHECK
Before returning the projector to the customer, it is recommended that leakage current be measured according to the
following methods.
With the AC plug removed from the AC source, place a jumper across the two AC plug prongs. Turn the projector AC
switch on. Using an 500V D.C. Insulation Tester, connect one lead to the jumpered AC plug and touch the other lead
to each exposed metal part (screwheads, etc.), particularly any exposed metal part having a return path to the
chassis. Exposed metal parts having a return path to the chassis should have a minimum resistance reading of 4
megohm. Any resistance below this value indicates an abnormality which requires corrective action.
North America

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3 -
w
q
e
t
r
y
u
i
o
!0
!1
Fig. 1
Parts List : See Part List Page 2.
PCBs LOCATION
Table 1-1
Item No. Parts Name
qLAMP POWER UNIT
wTERMINAL PCB ASSY
eIRF PCB ASSY
rFAN PCB ASSY
tPOWER SUB PCB ASSY
yFORMATTER PCB ASSY
uSIGNAL PCB ASSY
iKEY PCB ASSY
oIRR PCB ASSY
!0 PFC PCB ASSY
!1 POWER PCB ASSY

-
4 -
EXPOSED VIEW
!9
Ix1
Yx1
xx1
xx1
Ax1
Qx7
Rx2
Jx2
wx2
Sx2
Tx1
Tx1
!2 i
q
@0
!8
@0
!8
!5
!3
w
u
@2 @3
x1
zx1
Vx1
!7
Ux1
Lx1
Mx3
o
!0
Px2
Ox5 !1
!4
!6
Nx2
Kx1
AA
@1
@4
Cx3
Bx1
Dx1
Bx1
Hx2
Fx1
Ex1
Gx3
yt
r
e
Fig. 2-1
Number of Screws :
The number of Screws holding Parts.
Table 2-1
Parts Name Number of Screws
qFront Grill Unit Ax1
wTop Case Assy Bx2, Cx3, Dx1
eLens B Cover Ex1
rLens B Cover Fx1
tKEY PCB ASSY Gx3
ySpeaker Hx2
uPFC Holder Dx2
iSignal Assy Jx2, Kx1
oTerminal Board Lx1
!0 Power Assy Mx3, Nx2
!1 Lamp Power Unit Ox5, Px2
!2 Optical Unit Qx7
!3 Rear Grill Assy Rx2
!4 Cooling Fan (Power) Sx2
!5 Fan Holder Tx2
!6 IRF Holder Ux1
!7 IRF PCB ASSY Vx1
!8 Adjuster Foot none
!9 lens Cover Wx2
@0 Adjuster Foot Xx2
@1 Bottom Plate Yx1
@2 SW Holder Zx1
@3 Micro SW x1
@4 Bottom Case Assy ---
AA
Note: Technicians shall put on the wrist band to protect DLP against Static electricity during the operations.
LVP ASSY
Parts List : See Part List Page 3.

-
5 -
Bx4
Ax3
q
w
e
r
Bx2
Ex6
Cx3
q
w
t
r
e
Dx1
Ax1
Parts Name Number of Screws
qSIGNAL PCB ASSY Ax3
wSignal B Holder none
eSignal A Holder none
rFORMATTER UNIT Bx4
Number of Screws :
The number of Screws holding Parts.
Table 2-2
Fig. 2-3
Fig. 2-2
Parts List : See Part List Page 4.
Parts Name Number of Screws
qPower Frame Unit none (1 Hook)
wPOWER PCB ASSY Ax1, Bx2
ePFC PCB ASSY none
rTerminal Plate none
t
TERMINAL PCB ASSY
Cx3, Dx1, Ex6
Number of Screws :
The number of Screws holding Parts.
Table 2-3
Parts List : See Part List Page 4.
SIGNAL ASSY
POWER ASSY

-
6 -
q
ew
r
e
Bx1
Cx2
Ex4
Dx1
w
q
r
t
Ax1
y
Parts Name Number of Screws
q
LAMP POWER PCB ASSY none (2 Hooks)
w
POWER SUB PCB ASSY none (1 Hook)
eFAN PCB ASSY none (1 Hook)
rCHASSIS FLAME none
Number of Screws :
The number of Screws holding Parts.
Table 2-4
Fig. 2-5
Fig. 2-4
Parts List : See Part List Page 4.
Parts Name Number of Screws
qCooling Fan (DMD) Ax1, Bx1
wCooling Fan (LAMP) Cx2
eIRR PCB ASSY Dx1
rFan Duct Ex4
tIR Cover none
yRear Grill none
Number of Screws :
The number of Screws holding Parts.
Table 2-5
Parts List : See Part List Page 4.
LAMP POWER ASSY
REAR GRILL UNIT

-
7 -
Number of Screws : The number of Screws holding Parts.
Table 2-6
OPTICAL UNIT Part
Parts Name Number of Screws
qColor Wheel Assy Ax3
wColor Wheel Cover Bx2
eUVAR Filter - - -
rLens Unit Cx4
t
Cooling Fan (OPTICAL UNIT)
Dx1
Fig. 2-6
Ax3
Cx4
q
r
w
e
Bx1
Bx1
t
Dx1

-
8 -
2. Removal of TOP CASE ASSY
1. Remove the Front Grill following “1. Removal of FRONT
GRILL”.
2. Remove the six (b) screws as shown in Fig. 3-1.
3. Remove the Top Case Assy as shown in Fig. 3-1.
Note: Also remove the CR connector on the IRR PCB
ASSY, the KT connector on the KEY PCB ASSY
when removing the Top Case Assy.
1. Removal of FRONT GRILL
1. Remove the ( ) screw as shown in Fig. 3-1.
2. Remove the Front Grill as shown in Fig. 3-1.
x1
bx3
x1
bx1
bx1
b
Top Case Assy
Front Grill
Fig. 3-1
DISASSEMBLY
3. Removal of SIGNAL PCB ASSY and
FORMATTER PCB ASSY
1. Remove the Front Grill following “1. Removal of FRONT
GRILL”.
2. Remove the Top Case Assy following “2. Removal of
TOP CASE ASSY”.
3. Remove the two ( ) screws, the three (b) screws and
the SIGNAL PCB ASSY as shown in Fig. 3-2.
4. Remove the four (C) screws and the FORMATTER
PCB ASSY as shown in Fig. 3-2.
cx4
bx3
x2
SIGNAL PCB ASSY
SIGNAL B Holder
SIGNAL
A Holder
FORMATTER
PCB ASSY
Fig. 3-2