XG-NV51XE (serv.man8). Convergance and focus adjustment - Sharp Projector Service Manual (repair manual)

xg-nv51xe (serv.man8) service manual
Model
XG-NV51XE (serv.man8)
Pages
5 Few pages! See other manuals at the bottom of the first or last page.
Size
114.35 KB
Type
PDF
Document
Service Manual
Brand
Device
Projector / Convergance and focus adjustment
File
xg-nv51xe-sm8.pdf
Date

Read Sharp XG-NV51XE (serv.man8) Service Manual online

18
XG-NV51XE/XM/XA
CONVERGENCE AND FOCUS ADJUSTMENT
»
Start the convergence and focus adjustments with the top panel removed but the power
on. Use the remote control to adjust the image.
Take the following procedures.
1. Focusing the projection lens
(A) Replacing all the 3 LCD panels
1. Before replacing all the 3 LCD panels, project an image on the screen and bring it into focus.
2. Replace the LCD panels with new ones. But until the focus has been completely readjusted, be careful not
to change the projection distance between the set and the screen, nor to move the projection lens focus
and zoom rings.
Note:
If the focus is readjusted with a different positional relation, the relation between the projection distance
and the screen size is affected. In other words, a short-distance image (40 WIDE for example) may get out
of the focus range, or a long-distance image (300 WIDE for example) may come out of the focus.
(B) Replacing 1 or 2 of the 3 LCD panels
1. In adjusting the focus after replacement of one or two LCD panels, project an image on the screen and turn
the projection lens focus ring to get the non-replaced LCD panel into focus.
2. But until the focus has been completely adjusted for the new LCD panels, be careful not to change the
projection distance between the set and the screen, nor to move the projection lens focus and zoom rings.
3. If the projection distance has been changed or the projection lens readjusted, repeat the above steps 1 and
2.
2. Focus adjustment
(A) Adjusting the G-LCD panel(Make this adjustment on the white-only screen.)
1. Adjustment in  
θ
X and Z directions .
Loosen the lock screw "a" and insert an eccentric screwdriver into the notch and hole "a".  Turn the screwdriver
until the top, center and bottom on the screen get into focus. In adjusting this top-to-bottom focus, tighten
the lock screws "b" and "c" to fix the 
θ
Y direction adjustment.
First get the right and left halves in balance.  Then improve the accuracy while making the adjustment 2
below.
2. Adjustment in 
θ
Y direction
Temporarily tighten the lock screw "a" and loosen the lock screws "b" and "c". Insert the eccentric screwdriver
into the notch and hole "c" for adjusting in the 
θ
Y direction on the top of the screen. Insert the eccentric
screwdriver into the notch and hole "b" for adjusting in the 
θ
Y direction on the bottom of the screen.
3. Repeat the above steps 1 and 2 to finely adjust the focus.  Finally tighten up all the lock screws.
Notes :
1
Carefully proceed with the focus adjustment because the adjusting directions are correlated.
2
In adjusting the convergence and focus, do not move the projection lens zoom and focus rings until the end
of all the adjustments.
(B) Adjusting the B-LCD panel (Do the same for the R-LCD panel.)
1. Take the same procedure as for the G-LCD panel focus adjustment. Note that the adjustment range is
wider in the Z direction. If the convergence is quite different between the B-LCD and G-LCD panels, roughly
adjust the convergence first and then the focus.
3. Convergence adjustment
»
Use a crosshatch pattern signal for this adjustment.
Make the adjustment just for the G-LCD and the relevant colour.
1. Loosen the convergence lock screw "d".
2. Adjustment in Y and 
θ
Z directions
Put a hex wrench in the Y and 
θ
Z direction adjustment zone.
3. Adjustment in X direction
Put an eccentric cam adjusting wrench in the X direction adjustment zone.
19
XG-NV51XE/XM/XA
4. With the G-LCD panel's screen center as refernce, adjust the R-LCD and B-LCD panels.
5. Finally tighten up the convergence lock screw "d".
Notes :
1
The eccentric cam is used for convergence adjustment.
This means that the cam's turning and the linear movement are not always uniform.
2
This model is not equipped with the LCD image adjustment mechanism. This is because the cross-dichroic
prism is used for image formation. When the LCD panels all get into best focus, the images are almost
completely converged.
Convergence and Focus Adjustments Mechanism
R-LCD
B-LCD
Lock screw "a"
Lock screw "c"
Notch and 
hole "c"
Notch and 
hole "b"
Lock screw "c"
G-LCD
G-LCD
Lock screw "b"
Notch and hole "c"
Notch and hole "a"
Lock screw "d"
Lock screw "d"
R·B·LCD panel 
mounting screws
R·B-LCD
SIDE VIEW (from inside)
SIDE VIEW (from outside)
TOP VIEW
SIDE VIEW
G-LCD panel 
mounting screws
Eccentric cam
(Y direction adjustment)
Eccentric cam
(X direction adjustment)
Eccentric cam
(
θ
Z direction adjustment)
20
XG-NV51XE/XM/XA
Convergence and Focus Adjustments at a Glance
Adjustment directions
X direction
LCD right and left
Convergence Y direction
LCD top and bottom
θ
Z direction
Rotation around Z axis
LCD turning axis
Z direction
LCD optical axis
Focus
θ
X direction
Rotation around X axis
LCD top-to-bottom flapping
θ
Y direction
Rotation around Y axis
LCD right-to-left flapping
Adjustment
Direction
Definition
Direction of LCD panel
Convergence and Focus Adjustment for the Optical Mechanism
X direction
±0.8mm Eccentric cam
Eccentric cam adjusting wrench
d
Hex wrench
Convergence
Y direction
±0.8mm Eccentric cam
Eccentric cam adjusting wrench
d
Hex wrench
R/B
θ
Z direction
±1°
Eccentric cam
Eccentric cam adjusting wrench
d
Hex wrench
colours
Z direction
±0.8mm Notch and hole "a" & "c"
Eccentric screwdriver,
a, c
Focus
θ
X direction
±1°
Notch and hole "a" & "c"
 Bladed screwdriver
a, c
θ
Y direction
±1°
Notch and hole "b" & "c"
b, c
Z direction
±0.2mm
G colour
Focus
θ
X direction
±1°
Same as for R and B colours
θ
Y direction
±1°
Colour
Adjustment
Direction
Movement
Position
Adjusting tool
Lock screw
Tightening tool
Phillips
screwdriver,
*Hex wrench
Focus Adjustments the Other Way
a
Notch and hole "a"
Z and 
θ
X directions
b
Notch and hole "b"
θ
Y direction
c
Notch and hole "c"
Z, 
θ
X and 
θ
Y directions
Lock screw
Position
Related direction
Convergence and Focus Adjusting and Tightening Tools
Tool
Specific or General
Tool code
Configuration
Eccentric cam
Specific
9DASPN-XGNV1U
adjusting wrench
80
1.27mm, preferably use a 70 mm or
longer screwdriver (with a handle).
Phillips screwdriver
General
           —
For M2.6 pan-head machine screw
0.5
min85
ø
5
ø
3.5
3.5
Bladed screwdriver
General
9EQDRiVER-NV1B
100
2
2
92
5
7.5
2
5
16
R2
50
CUT
 
        9EQLNC-XGNV4U
9EQLNC-XGNV1U
Hex wrench
General (redesigned)
Eccentric screwdriver Specific
9DADRiVER-NV4U
*Hex wrench
General
           —
21
XG-NV51XE/XM/XA
Replacing the LCD panels
Detach the top panel and the optical mechanism unit in advance.
(1) Remove the four prism holder lock screws. Detach the prism holder from the optical mechanism unit.
(2) Remove the LCD panel lock screws (three each for the R-, G- and B-LCD panels). Detach the LCD panels from the
prism holder.
(3) Mount a new LCD panel in the reverse order of the above steps (1) and (2).
~
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.
1
G-LCD
SIDE VIEW
G-LCD panel 
mounting screws
Lock screw "d"
Lock screw "d"
R·B·LCD panel 
mounting screws
R·B-LCD
SIDE VIEW (from inside)
Prism holder
Optical Mechanism Unit
2
2
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Here you can read online and download Sharp XG-NV51XE (serv.man8) Service Manual in PDF. XG-NV51XE (serv.man8) service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sharp XG-NV51XE (serv.man8) Projector. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.