XG-NV21SE (serv.man4). Resetting the total lamp timer, The optical unit outline, Covergence and focus adjustment, Electrical adjustment, Adjusting the PC board, Troubleshooting table - Page 15-43 - Sharp Projector Service Manual (repair manual). Page 3

»

1. Before replacing all the 3 LCD panels, project an image on the screen and bring it into focus.
2. Replace the panels with new ones.  But until the focus has been completely readjusted, be careful not to

change the distance between the set and the screen, nor to move the projection lens focus and zoom
rings.
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 focus.

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

distance between the set and the screen, nor to move the projection lens focus and zoom rings.
(If the distance has been changed or the projection lens readjusted, repeat the above steps 1 and 2.)

1. Right-and-left focus adjustment (

θ

Y direction) .

Loosen the lock screws "b" and "c" and insert the eccentric screwdriver into the notch and hole "b".  Turn
the screwdriver until the right and left halves on the screen get into focus.
First get the right and left halves in balance.  Then improve the accuracy while making the adjustment 2
below.

2. Top-center-bottom focus adjustment (

θ

X and Z directions).

Loosen the lock screws "a" and "c" and insert the eccentric screwdriver into the notch and hole "a" or "c".
Turn the screwdriver until the top, center and bottom on the screen get into focus.  In adjusting this top-to-
bottom focus, temporarily tighten the lock screw "b" to fix the 

θ

Y direction adjustment.

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.

»

The G-LCD panel has no convergence adjustment mechanism. Use this panel as convergence adjustment
reference.

»

Take the same procedure as for the G-LCD panel focus adjustment. Note that the adjustment range is small
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.

»

Use a crosshatch pattern signal for this adjustment.
Make the adjustment just for the G-colour and the relevant colour.
(1) Loosen the convergence lock screw "d".
(2) With the G-LCD panel’s screen center as reference, adjust the B-LCD panel in the X, Y and 

θ

Z directions.

(3) Finally tighten up the convergence lock screw "d".

(

)

)

(