DOWNLOAD Sharp XG-P20XE (serv.man4) Service Manual ↓ Size: 1.38 MB | Pages: 35 in PDF or view online for FREE

Model
XG-P20XE (serv.man4)
Pages
35
Size
1.38 MB
Type
PDF
Document
Service Manual
Brand
Device
Projector / Service Manual Part 1 - Text - p1-35
File
xg-p20xe-sm4.pdf
Date

Sharp XG-P20XE (serv.man4) Service Manual ▷ View online

25
XG-P20XU
XG-P20XE
XG-P20XD
R-LCD panel
mounting screws
R adjusting plate
R-LCD
4
A
B
A
D
C
C
E
Fig.1
Fig.2
SIDE VIEW
Replacing the R-LCD panel
(1) Disconnect the LCD flat cable from the output PWB connector.
<Figure 1>
(2) Remove the two screws "A".
(3) Lift and detach the plate "B" together with the incident light deflection plate.
<Figure 2>
(4) Remove the four screws "C" and separate the units D and E from each other.
(5) Take the R-LCD panel out of the adjusting plate.
(6) Place and fix a new R-LCD panel in the reverse steps.
(7) Adjust the deflection plate. (See page 26).
(8) Adjust the focus and convergence. (See page 21.)
~
Readjust the convergence and focus. Note that the G LCD panel needs no convergence adjustment and has
a small adjustment range in the Z direction.
26
XG-P20XU
XG-P20XE
XG-P20XD
Adjusting the optical axis of the mirrors (M1, M5 and M6)
The optical axis must be readjusted if an eclipse happens with the R. G or B mirrors. Generally speaking,
this adjustment is needed when any of the internal optical components has been replaced.
Adjustment procedure required when any of the panels has been replaced or the convergence has been
adjusted
(1) Disconnect the flat cables of all the LCD panels.
(2) Let the lamp light up.
(3) To adjust the G mirror, shield the R and B mirrors with shielding plates (You can use a business card or the like to
block the light).
(4) Loosen the lock screw of the M1 adjust lever.
(5) Looking at the G image on the screen, turn or slide the M1 adjust lever until the eclipse on the screen disappears.
Tighten up the screw.
(6) To adjust the R mirror, shield the G and B mirrors and adjust the M5 adjust lever. For the B mirror, shield the R and
G mirrors and adjust the M6 adjust lever.
(Take the same steps 4 and 5 above.)
(7) Remove all the shielding plates to have a white image.
Make sure there is no eclipse.
FRONT
M5
 adjust lever
Lock screws
turn
turn
slide
slide
Shielding plate R
M6
 adjust lever
Lock screws
Shielding plate B
Shielding plate G
M1
 adjust lever
Lock screws
turn
slide
27
XG-P20XU
XG-P20XE
XG-P20XD
Color
adjustment
Adjustment direction
Amount of adjustment.
Adjustment place form
Ajdustment jig
Fixing screw
Fixed screw tool.
Red
polarizing plate adjustment
θ 
direction
±
1
°
Notch & Hole A
eccentric screwdriver
A
Phillips screwdriver
Green
polarizing plate adjustment
θ 
direction
±
1
°
Notch & Hole B
eccentric screwdriver
B
Phillips screwdriver
Blue
polarizing plate adjustment
θ 
direction
±
1
°
Notch & Hole C
eccentric screwdriver
C
Phillips screwdriver
Screw C
Notch & Hole C
Screw A
Screw B
Notch & Hole A
Notch & Hole B
Lamp duct
Lock screws
Adjustment procedure reguired when the lamp has been replaced and you can see ununifomity. (Case of
Right and Left have ununifomity on the screen)
(1) Let the lamp light up.
(2) Receive the white pattern signal at 100%.
(3) Loosen the four lock screws from the lamp duct.
(4) Looking at the white image on the screen, turn the lamp duct until the uniformity comes to best point on the screen.
(5) Tighten the lock screws of the lamp duct. (Tighten torque is 10
±
2kg·cm)
Adjusting the lamp duct.
Adjustment of incident polarizing plate.
Carry it out when removing polarizingplate.
(From the condition that the top cabinet opens.)
1.Remove screws, earth plate from the output PWB.
2.Extend each FFC cable of R, G, B (Using QCNW-4852CEZZ) and try so that it can move a PWB so that it can
see the part which adjusts polarizing plate from the top.
3.Turn on the power, and indicate a black screen on the screen.
<Adjusting the G-LCD incident polarizing plate.>
4.Move an output PWB so that you can see screw B and notch & hole B.
5.Put an eccentric screwdriver (9EQDRIVER-NV1A) in notch & hole B, and loosen screw B.
(Loosen it too much, and be careful that the screw doesn't come off.)
6.Adjust with the eccentric screwdriver in the place where a brightness is the lowest, and tighten screw B, and fix it
with seeing a black screen.
Adjust it with screw A and notch & hole A when adjusting incident polarizing plate of R-LCD.
Adjust it with screw C and notch & hole C when adjusting incident polarizing plate of B-LCD.
Adjust it in the turn of Green, Red, Blue with 3 place of RGB as well when adjusting it.
Be careful not to make it short-circuit when moving an output PWB.
28
XG-P20XU
XG-P20XE
XG-P20XD
ELECTRICAL ADJUSTMENT
Hook up a signal generator, or a DOSV or Mac personal computer to the projector in order to feed the
signals specified in the Adjusting conditions.
No.
Adjusting point
Adjusting conditions
Adjusting procedure
1
EEPROM
initialization
1. Turn on the power (make
sure the lamp lights up) and
warm up the unit for 15 min-
utes.
»
Make the following settings:
Press S2601 to call up the process mode and
execute S2 and S4 in the SSS menu. Now the
system, with the PC board not included, is initial-
ized. Do not execute S1 because otherwise the
PC board will be initialized.
To adjust the PC board, follow the instruction in
"Adjusting the PC Interface". (See page 34)
2
R drive
1. Make the following choice.
Group : A/D
2. Feed the 100% red-only sig-
nal. Make the following
choice.
Group : A/D
Subject : R-D
»
Using the control switches or the remote controller
buttons, adjust the data so that the signal be-
comes bit-less (noise).
3
B drive
1. Feed the 100% blue-only
signal. Make the following
choice.
Group : A/D
Subject : B-D
»
Using the control switches or the remote controller
buttons, adjust the data so that the signal be-
comes bit-less (noise).
4
G drive
1. Feed the 100% green-only
signal. Make the following
choice.
Group : A/D
Subject : G-D
»
Using the control switches or the remote controller
buttons, adjust the data so that the signal be-
comes bit-less (noise).
5
RGB 1 system
black level
signal amplitude
(odd-numbered)
»
 Choose the subject G1-GAIN and adjust the sig-
nal amplitude to 3.9 
±
0.05 Vp-p using the control
switches or the remote controller buttons.
»
Next, choose the subject G-BLK and adjust the
white peak level to 2.0Vp-p 
±
0.1V.
1. Make the following choice:
Group : OUTPUT 1
Subject : G1-BLK
G1-GAIN
For green, choose the sub-
    jects R1-BLK and R1-
GAIN.
For blue, choose the sub-
jects B1-BLK and B1-GAIN.
2. Connect the oscilloscope to
TP1101  for red.
    TP1201  for green
    TP1301  for blue
3.9Vp-p
2.0Vp-p
»
Make the same adjustments for green and blue.
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