Service manual

If we line the x and y, then the Pb offset is the shift action and the Pr offset is the rotational action.
(3) Connect power, YPbPr Video into projector.
(4) Change Timing and pattern of pattern generator :
Timing : 480P(H:31.54 KHz,V:60.08 Hz)
pattern : black
(5) Light on projector
(6) Set user OSD values to default.
(7) Enter factory mode.
(8) Set Factory values to default.
(9) Follow the PbPr offset adjustment flow chart:
Case
x1>x0 & y1>y0
Decrease Pb offset
until x<=x0 or
y<=y0
Case x<=x0:
The value note (x2,y2).
Dy = y2 - y0.
Decrease Pb offset until the y
value <= y2 - 1/2Dy . Now, the
reading of the Lux meter =
(x3,y3) and x3 will < x0, y3 will
> y0.
Decrease Pr offset the x value
will increase and y value will
decrease to meet the spec.
Increase Pr offset the x value will
decrease and y value will increase
to meet the spec.
Decrease Pb offset until the x
value <= x2 - 1/2Dx . Now, the
reading of the Lux meter =
(x3,y3) and x3 will > x0, y3 will
< y0.
Case y<=y0:
The value note (x2,y2).
Dx = x2 - x0.
Case
x1<x0 & y1<y0
Increase Pb offset
until x>=x0 or
y>=y0
Case x>=x0:
The value note (x2,y2).
Dy = y0 - y2.
Increase Pb offset until the y
value >= y2 + 1/2Dy . Now, the
reading of the Lux meter =
(x3,y3) and x3 will > x0, y3 will
< y0.
Increase Pr offset the x value will
decrease and y value will increase
to meet the spec.
Decrease Pr offset the x value
will increase and y value will
decrease to meet the spec.
Increase Pb offset until the x
value >= x2 + 1/2Dx . Now, the
reading of the Lux meter =
(x3,y3) and x3 will < x0, y3 will
> y0.
Case y>=y0:
The value note (x2,y2).
Dx = x0 - x2.
Case
x1>x0 & y1<y0
Increase Pr offset until
x<=x0 or y>=y0
A B C
D
Case x<=x0: Case y>=y0:
BC
Case
x1<x0 & y1>y0
Decrease Pr offset
until x>=x0 or y<=y0
Case x>=x0: Case y>=y0:
DA
Use Lux meter to
read the coordinate of
black and the value
note (x1,y1).
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