Service manual

PV152 2-13 PROJO
OBSERVING POINTS
OBSERVING POINTS OF THE
CORNER OF THE PICTURE
BLUE DEFOCUS ADJUSTMENT
Adjustment preparation
1. Optical and electrical focus adjustment should have
been completed.
2. The convergence adjustment should have been
completed.
3. Set Video conditions to factory reset.
Adjustment procedure
1. Input a Crosshatch Signal to VIDEO input.
2. Short-circuit 2P sub-mini connectors on the red and
green CPT P.W.B.s to display only the blue beam.
3. Turn the B Focus VR(Focus Pack) fully clockwise.
4. Adjust BLUE defocus according to the following
specifications. 1mm on each side equaling 2mm total
See figure Below.
Blue Defocus “Sticking Out”
Center of Blue crosshatch line
R
G
B
R
G
B
S
c
r
e
e
n
V
R
F
o
c
u
s
V
R
FOC
U
S
P
A
C
K
WHITE BALANCE ADJUSTMENT
1. Screen adjustment
2. High brightness white balance
3. Low brightness balance
Screen Adjustment VRs Drive Adjustment VRs
Red: on Focus Pack Red: R829R on CRT P.W.B.
Green: on Focus Pack Green: R879G on CRT P.W.B.
Blue: on Focus Pack N/A
Adjustment VRs:
Screen adjustment VRs on Focus Block
Drive adjustment VRs on CRT P.W.B.
Red Drive = R829R
Green Drive = R879G
Preparation for adjustment
1. Start adjustment 20 minutes or more after the power
is turned on.
2. Turn the brightness and black level OSD to minimum
by remote control.
3. Receive a tuner signal, (any channel, B/W would be
best).
4. Set the drive adjustment VRs (Red R829R and Green
R879G) to their mechanical centers.
Adjustment procedure
1. Go to I
2
C ADJ. Mode. (With power ON, press DTV/SAT
and Cursor Down buttons at the same time. Service
Menu is displayed.)
2. Choose SERVICE item Number [2] of I
2
C ADJ. Mode.
(Select ON by Cursor Right and the Vertical will
collapses).
3. Gradually turn the screen adjustment VRs (red, green,
blue) clockwise and set them where the red, green
and blue lines are equal and just barely visible.
4. Return Service item on I
2
C ADJ to Off by Cursor Right.
Number [2].
Adjust the Sub Brightness Number [1] SUBBRT using
I
2
C Bus alignment procedure so only the slightest
white portions of the raster can be seen.
5. Input a gray scale signal into any Video input and
select that input using the INPUT button on the
remote or front control panel.
6. Turn the Brightness and Contrast OSD all the way up.
7. Make the whites as white as possible using the drive
adjustment VRs (Red R829 and Green R879).
8. Set the Brightness and Contrast to minimum. (10800
Kelvin)
9. Adjust the low brightness areas to black and white,
using screen adjustment VRs (red, green, blue).
10. Check the high brightness whites again. If not OK,
repeat steps 6 through 9.
11. Press the MENU key on remote to Exit Service Menu.
CONVERGENCE ADJUSTMENT