Sanyo PLC-SU50S User manual

Multimedia Projector
SERVICE MANUAL
PRODUCT CODE
1 122 217 00 (MA7A)
1 122 218 00 (PA7A)
1 122 218 02 (PA7C)
Original Version
REFERENCE NO. SM5110511-00
FILE NO.
Model No. PLC-SU50S
U.S.A., Canada,
Europe, Asia, Africa
U.K.
Chassis No. MA7-SU50S00
NOTE: Match the Chassis No. on the unit’s
back cover with the Chassis No. in the
Service Manual.
If the Original Version Service
Manual Chassis No. does not match
the unit’s, additional Service
Literature is required.You must refer to
“Notices” to the Original Service
Manual prior to servicing the unit.

-2-
■ Contents
■ Contents________________________________________________________2
■ Safety Instructions ________________________________________________3
■ Specifications ____________________________________________________4
■ Circuit Protections ________________________________________________5
● Fuse ____________________________________________________5
● Thermal switch ____________________________________________5
● Lamp cover switch __________________________________________5
● Warning temperature and power failure protection ________________6
■ Lamp Replacement ______________________________________________7
■ Mechanical Disassemblies__________________________________________8
■ Optical Parts Disassemblies ______________________________________12
■ Adjustments ____________________________________________________17
● Adjustments after Parts Replacement __________________________17
■ Optical Adjustments ______________________________________________18
■ Electrical Adjustments ____________________________________________21
● Service Adjustment Menu Operation____________________________21
● Circuit Adjustments ________________________________________22
● Test Points and Locations ____________________________________26
● Service Adjustment Data Table ________________________________27
■ Chassis Block Diagrams __________________________________________34
Chassis over view ____________________________________________34
Inputs & video signal processing stage ____________________________35
LCD panel driving stage ______________________________________36
Audio signal processing circuit __________________________________37
System controls ______________________________________________38
Power supply & protection circuit ________________________________39
Fan control circuit ____________________________________________40
■ Troubleshooting ________________________________________________41
No Power __________________________________________________41
No Picture __________________________________________________42
No Sound __________________________________________________44
■ Control Port Functions ____________________________________________45
■ Waveform ____________________________________________________49
■ Cleaning ______________________________________________________50
■ IC Block Diagrams ____________________________________________51-57
■Service Parts List ____________________________________________58-87
Electrical Parts List ________________________________________59-82
Mechanical Parts List ______________________________________83-89
Drawings & Diagrams
■Parts description and reading in schematic diagram ____________________ A2
■Schematic diagrams ________________________________________ A3-A10
■Printed wiring board diagrams ________________________________ A11-A14
■Pins description of ICs, transistors, diodes __________________________ A15

-3-
■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 iden-
tified with the line ( ) in the schematic diagram. For continued product safety and protection of personnel
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 projector.
2: Comply with all caution and safety-related notes pro-
vided 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, adjustment covers
or shields, barriers, etc.
DO NOT OPERATE THIS PROJECTOR WITHOUT
THE PROTECTIVE SHIELD IN POSITION AND
PROPERLY 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.
DO NOT ATTEMPT TO SERVICING THE REMOTE CONTROL UNIT.
Laser Beam may be leaked out when in disassemble the Unit. As the Laser Beam used
in this Remote control unit is harmful to the eyes.

-4-
■Specifications
This symbol on the nameplate means the product is Listed by Underwriters
Laboratories Inc. It is designed and manufactured to meet rigid U.L. safety stan-
dards against risk of fire, casualty and electrical hazards.
0.8" TFT Active Matrix type, 3 panels
Multi-media Projector
6.0 lbs (2.7 kg)
11.73" x 2.8" x 8.43" (298mm x 71mm x 214mm) (not including raised portions)
800 x 600 dots
1,440,000 (800 x 600 x 3 panels)
PAL, SECAM, NTSC, NTSC4.43, PAL-M, and PAL-N
H-sync. 15 ~ 80 KHz, V-sync. 50 ~ 100 Hz
Adjustable from 33” to 300”
1 speaker, ø1.1" (28mm)
41 ˚F ~ 95 ˚F (5 ˚C ~ 35 ˚C)
14 ˚F ~ 140 ˚F (-10 ˚C ~ 60 ˚C)
Projector Type
Net Weight
Dimensions (W x H x D)
Panel Resolution
Number of Pixels
Color System
Scanning Frequency
Projection Image size (Diagonal)
Built-in Speaker
Operating Temperature
Storage Temperature
LCD Panel System
●The specifications are subject to change without notice.
F 1.7 ~ 2.1 lens with f 26.7 mm ~ 32.0 mm with manual zoom and focus
4.3’ ~ 32.8’ (1.3 m ~ 10.0 m)
200 W
RCA Type x 1 (Video) and Mini DIN 4 pin x 1 (S-Video)
Projection Lens
Throw Distance
Projection Lamp
Video Input Jacks
RCA Type x 2
Audio Input Jacks
DVI-I Terminal (Digital/Analog) (HDCP compatible)
Mini Jack (stereo) x 1
Mini DIN 8 pin x 1
Mini Jack (stereo) x 1 (variable with volume)
1.0 W RMS
Computer Input 1 Terminal
Computer / Component Audio Input Jack
Service Port Connector
Audio Output Jack
Internal Audio Amp
0˚ to 11.8˚
Feet Adjustment
Power Source : AA, UM3 or R06 Type x 2
Operating Range : 16.4’ (5m) / ±30˚
Dimensions : 2.0” x 1.0” x 7.1” (50mm x 27mm x 181mm)
Net Weight : 0.34 lbs (154 g) (including batteries)
Laser Pointer : Class II Laser (Max. Output : 1mW / Wave length : 640 ~
660nm)
Remote Control
480i, 480p, 575i, 575p, 720p, 1035i, and 1080i
High Definition TV Signal
USB Series B receptacle x 1
USB Connector
AC 100 ~ 120 V (3.6 A Max. Ampere), 50 / 60 Hz (The U.S.A and Canada)
AC 200 ~ 240 V (1.8 A Max. Ampere), 50 / 60 Hz (Continental Europe and The U.K.)
Voltage and
Power Consumption
Computer Input 2 / Component Input /
Monitor Output Terminal
(VGA) HDB 15 Terminal x 1 (switch to use this terminal)
●LCD panels are manufactured to the highest possible standards. Even though 99.99% of the pixels are effective, a tiny
fraction of the pixels (0.01% or less) may be ineffective by the characteristics of the LCD panels.

●Lamp cover switch
The lamp cover switch (SW901) cuts off the drive signal to the
lamp circuit when the lamp cover is removed or not closed com-
pletely. After opening the lamp cover for replacing the lamp ass’y,
place the lamp cover correctly otherwise the projector can not
turn on.
●Thermal switch
There is the thermal switch (SW902) inside of the projector to
detect the internal temperature rising abnormally. When the inter-
nal temperature reaches near 90˚C, it cuts off the AC main power
supply .
The thermal switch cannot be reset itself automatically even if the
internal temperature becomes normal. Reset the thermal switch
following to the below procedure.
How to reset the thermal switch
1. Insert the sharp tool like a screwdriver into a hole on the cabi-
net bottom.
2. Press the reset button on the thermal switch with the screw-
driver.
CAUTION:
Before press the reset button, make sure that the AC cord must
be disconnected from the AC outlet.
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.
●Fuse
A fuse is located inside of the projector. When the POWER indica-
tor is not lightning, the fuse may be opened. Check the fuse as fol-
lowing steps.
The fuse should be used with the following type;
Fuse replacing steps
1. Remove the cabinet top and cabinet front following to
“Mechanical Disassemblies”.
2. Replace the new one with the specified type.
Fuse Part No.: 423 021 7801
TYPE T6.3AH 250V FUSE
LITTLE FUSE INC. TYPE 21506.3
-5-
Thermal switch (SW902)
Fuse
■Circuit Protections

-6-
Circuit Protections
●Warning temperature and power failure protection
The projector will be automatically turned off when the internal temperature of the projector is abnormally high, or
the cooling fans stop spinning, or the power supplies in the projector are failed.
- If the WARNING indicator is flashing, it may detect the abnormal temperature inside the projector. Check the fol-
lowing possible causes and wait until the WARNING indicator stops flashing, and then try to turn on the projector.
- If the WARNING indicator lights red, it may defect the cooling fans or power supply circuits. Check fans operation
and power supply lines referring to the chapter “Power supply & protection circuit” in the Chassis Block Diagram
section.
Possible causes
- Air filters are clogged with dust particles. Remove dust from the air filters by following instructions in the “Air filter
care and cleaning” below.
- Ventilation slots of the projector are blocked. In such an event, reposition the projector so that ventilation slots are
not obstructed.
- Check if projector is used at higher temperature place (Normal operating temperature is 5 to 35 ˚C or 41 to 95˚F)
Air filter care and cleaning
The removable air filter prevents dust from accumulation on the surface of the projection lens and projection mirror.
Should the air filter become clogged with dust particles, it will reduce the cooling fan’s effectiveness and may result
in internal heat build up and reduce the life of the projector.
To clean up the air filters, follow the cleaning procedure
below:
1. Turn the power off, and disconnect the AC power cord
from the AC outlet.
2. Turn the projector up side down and remove air filters
by pulling the latches of it upward.
3. Clean the air filters with brush or wash out the dust and
particles.
4. Replace the air filters properly. Make sure that the air fil-
ters are fully inserted.
CAUTION:
Do not operate the projector with the air filters removed.
Dust may accumulate on the LCD panel and the projection
mirror degrading picture quality.
Do not put small parts into the air intake vents. It may result
in malfunction of the projector.
RECOMMENDATION
We recommend not to use the projector in dusty, smoky places. Using it in dusty place may cause the poor picture
quality.
When using under the dusty or smoky conditions, dust may accumulate on the LCD panel and lens inside it, and
may resultantly be projected on the screen together with the picture.
When the above symptoms are noticed, please clean up the LCD panel and lens following to the “Cleaning
Method”.
Air filter

-7-
■Lamp Replacement
The LAMP REPLACE indicator will light yellow when
the total lamp used time reaches 2000 hours. This is
to indicate that lamp replacement is required.
The total lamp used time is calculated by using the
below expression,
Total lamp used time = Teco + Tnormal (1+1/3)
Teco:used time in the Eco mode
Tnormal :used time in the Normal mode
You can check the lamp used time following to the
below procedure.
1Press and hold the POWER ON-OFF button on the
projector for more than 20 seconds.
2 The projector used time and lamp used time will be
displayed on the screen briefly as follows.
WARNING:
- For continued safety, replace with a lamp assembly of the same
type.
- Allow the projector to cool for at least 45 minutes before you open
the lamp cover. The inside of the projector can become very hot.
- Do not drop the lamp module or touch the glass bulb! The glass can
shatter and cause injury.
Procedure
1Turn off the projector and disconnect the AC cord. Allow the projector
to cool for at least 45 minutes.
2Loosen 1 screws with a screwdriver and remove the lamp cover.
3Loosen 2 screws and pull out the lamp assembly by grasping the
handle.
4Replace the lamp with a new one and tighten the 2 screws back into
position. Make sure that the lamp is set properly. Replace the lamp
cover and tighten the screw.
5Connect the AC cord to the projector and turn on.
6Reset the Lamp Replace Counter, see below explanation.
Note:
- The projector cannot be turned-on with lamp cover removed,
because when the lamp cover is removed, the lamp cover switch is
also released to switch off the lamp circuit.
1Turn the projector on, press the MENU button and the
On-Screen Menu will appear. Press the Point
Left/Right button to move the red frame pointer to the
Setting Menu icon.
2Press the Point Down button to move the red frame
pointer to the Lamp counter reset item and then press
the SELECT button. The message "Lamp replace
counter Reset?" is displayed. Move the pointer to
[Yes] and then press the SELECT button.
3Another confirmation dialog box appears and select
[Yes] to reset the Lamp replace counter.
Recommendation
Should the air filter become clogged with dust particles,
it will reduce the cooling fan’s effectiveness and may
result in internal heat build up and short lamp life. We
recommend cleaning the air filter after the projection
lamp is replaced.
Refer to “Air Filter Cleaning”.
Counter
Projector 525H
Lamp
Normal 150H
Eco 375H
Total 575H
Total lamp used time
How to reset Lamp Replace Counter
How to check Lamp used time
ORDER REPLACEMENT LAMP
Type No.Service Parts No.
POA-LMP65 610 307 7925
Lamp
Lamp Cover Screw
Screw
Handle
Screw
Projector used time

Fig.1
A
Cabinet Top
Screws Expression
(Type Diameter x Length) mm
T type M Type
A
A
A
A
BC
C
FN901
-8-
1Remove 5 screws A(M3x8) and pull the Cabinet Top upward off.
2Loosen a hook B, disconnect terminal “K6J” on the Main Board and then
pull the fan duct ass’y upward off.
3Remove 2 screws C(T3x6) and remove fan “FN901”.
zCabinet Top, FN901 removal
■Mechanical Disassemblies
Mechanical disassemble should be made following procedures in numerical order.
Following steps show the basic procedures, therefore unnecessary step may be ignored.
Caution:
The parts and screws should be placed exactly the same position as the original otherwise it may cause loss of
performance and product safety.

-9-
Mechanical Disassemblies
1Remove 2 screws A (M3x8), 3 screw B (M2.5x6) and disconnect terminal
“K8D” on the Main Board.
2Pull the Cabinet Front forward off and remove 1 screw C (T3x6) to take the
R/C Board off.
3Disconnect terminal “K8P” on the Main Board and remove fan “FN902”.
xCabinet Front, R/C Board, FN902 removal
A
C
R/C Board
Fig.2
1Remove 7 screws A (M2.5x6) and 2 screws B (M2.5x6).
2Remove a shield cover (black) and disconnect terminals “K8N”, “K6L”,
K8H”, “K8P”, K5B”, “K5G”, “K5R”, K6J”, “K8R” and “K8S” on the Main
Board.
3Remove main board upward off.
cMain Board removal
Main Board
A
B
B
B
FN902
A
AA
A
A
A
A
B
B
Fig.3

1Remove 6 screws A(T3x8) and disconnect terminal “K6A” on the lamp bal-
last board.
2Pull the Optical Unit upward off from the cabinet bottom.
-10-
AA
Mechanical Disassemblies
Fig.5
bOptical Unit removal
1Pull the speaker “SP901” upward off from the speaker groove.
2Remove each screw A(M4x6) to release grounding wires.
3 Pull the Rear Panel ass’y upward off.
4Remove 4 screws B(T3x6) and remove the AV Board and remove 3
screws C(T3x6) and remove the DVI Board.
Fig.4
vSpeaker, AV and DVI Board removal
A
B
C
DVI board
AV board
Speaker
B
C
A
A
A
A
A

FN903
A
BB
B
C
B
C
FN904
D
FN906
F
E
FN905
Fan Cover-A Fan Duct-A
Fan Cover-B
-11-
Mechanical Disassemblies
1Remove 1 screw A(T3x8) and remove fan “FN903”.
2Remove 4 screws B(T3x8) and 2 screws C(T3x10), and
take the fan cover-A and fan “FN904”.
3Remove 1 screw D(T3x8) and take the fan duct-A and
fan “FN906”.
4Remove 1 screw E(T3x8), 2 screws F(T3x10) and take
the fan cover-B and fan “FN905”.
Fig.7
mFans removal
1Remove the isolation plate on the power box.
2Remove 4 screws A(T3x6) and disconnect terminals
“K6A”, “K6B” and “K6D” then remove Power Board
upward.
3Remove 4 screws B(T3x6) and disconnect terminal
"CB2” and remove the Lamp Ballast Board upward.
4Remove 2 screws C(M2.5x6) and remove the Lamp
Cover SW Board.
5Remove 4 screws D(T3x8) and pull the power box bot-
tom upward.
Fig.6
nPower , Lamp Ballast, Lamp Cover SW Board removal
A
A
A
A
Isolation plate
Power Board
Lamp Ballast Unit
B
B
B
B
Lamp Cover
SW Board
C
Thermal
SW
(SW902)
D
D
D
D
F

-12-
■Optical Parts Disassemblies
Before taking this procedure, remove Cabinet Top , Cabinet Front and Main Board following to the “Mechanical
Disassemblies”.
Disassembly requires a 2.0mm hex wrench.
1Remove 4 screws (M2.5x8) and remove the Projection Lens.
1Remove 2 screws A(M2.5x5) and pull the Integrator Lens-In ass’y upward.
2Unhook 4 stoppers Band then take the Lens off from the holder.
Fig.1
Integrator Lens
* Lens should be placed as the
rugged surface side comes to
the holder side.
Fig.2-1
Fig.2-2
zProjection Lens removal
xIntegrator Lens-In disassembly
Stoppers B
A
A
Stoppers B

-13-
Optical Pats Disassemblies
1Remove 2 screws A(M2.5x5) and pull the Relay Lens-Out ass’y upward.
2 Remove 2 screws B(M2x3) to take the Lens off from the holder.
Note:
There is no mounting direction of the lens.
1Remove each screw (M2.5x5) and pull the Polarized Glass-In ass’y
upward.
2Unhook the stoppers and take the glass off upward.
Hooks
Polarized Glass-In
Fig.4-2
Fig.4-1
*Should be places the glass as the
film attached side comes to the
prism side.
Phase Sheet
A
Fig.3-2
Fig.3-1
B
B
Holder
Relay Lens-Out
A
cRelay Lens-Out disassembly
vPolarized Glass-In removal

LCD Panel/
Prism Ass’y
B
A
-14-
1Insert the hexial driver into a hole on the cabinet bottom
and loosen 1 screw A on the Prism base.
2Loosen 2 screws Bon the LCD Panel/Prism ass’y.
3 Pull the LCD Panel/Prism ass’y upward off from the opti-
cal unit.
Note:
Do not remove the LCD panels from the Prism ass’y. Do not
replace the LCD panel separately otherwise it cannot obtain
proper picture.
Fig.5
bLCD Panel/Prism Ass’y removal
Optical Parts Disassemblies
IMPORTANT NOTICE on LCD Panel/Prism Ass'y Replacement
LCD panels used for this model can not be replaced separately. Do not disassemble the LCD Panel/Prism Ass’y.
These LCD panels are installed with precision at the factory. When replacing the LCD panel, should be replaced
whole of the LCD panels and prism ass’y at once.
After replacing LCD Panel/Prism ass’y, please check the following points.
- Check that there is no color shading at the top, bottom, left or right of the screen. If there is, try to remove
the shading following to the chapter “Optical Adjustment”.
- Check the white balance. If it needs the adjustment, adjust the white balance following to the “White Balance
Adjustment” , “Gamma Adjustment” and “Common Centre Adjustment” in the chapter “Electrical Adjustment”.
- Check the white uniformity on the screen.
If you find the color shading at the some part of the screen, it needs to take the color shading adjustment.
This adjustment should be performed by a computer and it also requires a special software “Color Shading
Correction”. The software will be supplied separately and can be ordered as follows;
COLOR SHADING CORRECTION Ver. 3.0
Service Parts No.645 056 6288

-15-
Optical Parts Disassemblies
1Remove 4 screws A (T3x8) and 3 screws B (T3x8) to take the Optical Unit
Top-A and B upward.
Fig.6
nOptical Unit Top removal
Optical Unit Top-B
B
B
B
A
A
A
A
Optical Unit Top-A

-16-
A
D
D
E
B
C
C
5
8
9
Fig.7
2
4
1
3
7
6
11
1Integrator lens (OUT)
2Prism beam splitter (PBS)
3Condenser lens (OUT)
4Dichroic mirror (B)
5Dichroic mirror (G)
6Condenser lens
7Relay lens (IN)
8Mirror (R)
9Condenser lens (R)
10 Condenser lens (B)
11 Mirror (B)
12 Optical filter (UV cut)
Key No. Description
10
Optical Parts Disassemblies
When the optical parts in the optical unit mounting or assembling, the
parts must be mounted in the specified location and direction as
shown in figure below.
mLocations and Directions
The arrows in the figure indelicate the mount direction
of the part for the replacement. Check the number on
the arrows and mount each part according to its note;
A: The printed part no. comes to this side.
B: The printed part no. comes to the bottom side.
C: The printed part no. comes to this side.
D: The printed part no. comes to the top side and the
number can be read from the arrow direction.
E: The cutting corner comes to this side up.
12

-17-
● :Adjustment necessary ❍ :Check necessary
Contrast Adjustment
R-Contrast adjustment ●
G-Contrast adjustment ●
B-Contrast adjustment ●
Integrator lens adjustment ❍●
Relay lens-out adjustment ❍●
Fan control adjustment
Clamp adjustment ●
Sub gain adjustment ●
Video center adjustment ●
PSIG adjustment ●
Black reference adjustment ●
Common center adjustment ● ●
Gamma adjustment ● ●
White balance adjustment ❍ ❍
White uniformity adjustment ❍
Disassembly / Replaced Parts
LCD/
Prism Ass’y
Integrator
Lens (OUT)
Polarized glass
RGB
Optical Adjustments
Electrical Adjustments
Main Board
Relay
Lens (OUT)
Power
Board
●Adjustments after Parts Replacement
■Adjustments

-18-
■Optical Adjustments
[Before Adjustment]
- Input a 100% of black raster signal.
1Loosen a screw A(Fig.1-1/1-2) on the polarized glass mounting
base which you intend to adjust.
2Turn the polarized glass mounting base as shown in Fig.1-1 to
obtain the darkest brightness on the screen.
3Tighten the screw Ato fix the polarized glass mounting base.
Repeat steps 1 to 3 for remaining polarized glasses.
B-Polarized Glass
Mounting Base
R-Polarized Glass
Mounting Base
G-Polarized Glass
Mounting Base
A
A
A
Fig.1-2
Fig.1-1
Polarized glass
mounting base
Main Board
A
Contrast adjustment
Before taking optical adjustments below, remove the Cabinet Top following to the “Mechanical Disassemblies”.
Adjustments require a 2.0mm hex wrench and a slot screwdriver. When you adjust Integrator lens or Relay lens
adjustment, you need to disconnect FPC cables of LCD panels on the main board.
Optical adjustment requires a 2.0mm hex wrench and a slot screwdriver.
Note: Do not disconnect connectors on the main board, because the projector cannot turn on due to operate the
power failure protection.

-19-
1 Turn the projector on by a state of without FPC cables.
2 Project all of lights on the screen.
3 Adjust the adjustment base of integrator lens assy to make color
uniformity in white.
1) If the shading appears on the left or right of the screen as
shown in Fig.2-1, loosen 2 screws A, and adjust the slot Bto
make color uniformity in white by using a slot screwdriver.
2) If the shading appears on the top or bottom of the screen as
shown in Fig.2-2, loosen 2 screws C, and adjust the slot Dto
make color uniformity in white by using a slot screwdriver
4 Tighten screws Aand Cto fix the Integrator lens unit.
Note:
The relay lens adjustment must be carried out after completing this
adjustment.
Optical Adjustments
Integrator lens adjustment
Fig.2-2
y
x
Moving of Slot D
Slot D
ab
a
b
Moving of slot B
Fig.2-1
Slot B
A
C
y
x
White
White
A

-20-
1Turn the projector on by a state of without FPC cables.
2 Project all of lights on the screen.
3Adjust the adjustment base of relay lens assy to make color unifor-
mity in white.
If the shading appears on the left or right of the screen as shown in
Fig.3, loosen 1 screw A, and adjust the slot Bto make color unifor-
mity in white by using a slot screwdriver.
4Tighten the screws Ato fix the relay lens unit.
Fig.3
A
Slot B
a
b
b
Moving of slot B
a
White
Relay lens-Out adjustment
Optical Adjustments