PG-B10S (serv.man15). (11) Electrical adjustment — Sharp Projector Service Manual (repair manual)

Model
PG-B10S (serv.man15)
Pages
8
Size
38.88 KB
Type
PDF
Document
Service Manual
Brand
Device
Projector / (11) Electrical adjustment
File
pg-b10s-sm15.pdf
Date

View Sharp PG-B10S (serv.man15) Service Manual online

25
PG-B10S
ELECTRICAL ADJUSTMENT
1
EEPROM
initialization
1. Turn on the power (with the
lamp on) and warm up the
set for 15 minutes.
»
Make the following settings.
Press S2002 to call the process mode and execute
"SS2" on SS menu.
2-1
R/G/B Bright-
ness adjustment
1. Select the following group
and subjects.
Group : AD
Subject : R-Bright
G-Bright
B-Bright
(Process GAMMA interlock)
2. Feed the SVGA 16-step sig-
nal with an amplitude level
of 50% (0.35 Vp-p).
1.Check the setting valve.
R/G/B-Bright:  63
No.
Adjusting point
Adjusting conditions
Adjusting procedure
2-2
R/G/B Contrast
adjustment
1. Select the following group
and subjects.
Group : AD
Subject : R-Contrast
G-Contrast
B-Contrast
(Process GAMMA interlock)
2. Feed the SVGA white sig-
nal with an amplitude level
of 96% (0.67 Vp-p).
1.Watching the screen, adjust the R-, G- and B-Con-
trast settings so that because of some pixel drop-
outs, the bright color zone should become just about
a half.
3
DTV Brightness/
Contrast adjust-
ment
1. Feed a 480P component
10-step signal with 100%
amplitude.
2. Select the following group
and subjects.
Group : DTV
Subject : Bright
Contrast
(Process GAMMA interlock)
1. Check the setting value.
Contrast (White Level): 45
Bright (Black Level):
32
4
DVD Brightness/
Contrast adjust-
ment
1. Feed a 480I component 10-
step signal with 100%
amplitude.
2. Select the following group
and subjects.
Group : DVD
Subject : Bright
Contrast
(Process GAMMA interlock)
1. Check the setting value.
Contrast (White Level): 46
Bright (Black Level):
34
No.
Adjusting point
Adjusting conditions
Adjusting procedure
26
PG-B10S
5
Video Bright-
ness/Contrast
adjustment
1. Feed an NTSC composite
video 10-step signal (no
setup) with 100% ampli-
tude.
2. Select the following group
and subjects.
Group : VIDEO
Subject : Bright
Contrast
(Process GAMMA interlock)
1. Check the setting value.
Contrast (White Level): 43
Bright (Black Level):
142
6
PSIG adjust-
ment
1. Select the following group
and subjects.
Group : OUTPUT2
Subject : PSIG-H
PSIG-L
2. Check the fixed value.
PSIG-H: 140
PSIG-L: 105
GND
Adjust with PSIG-L
Adjust with PSIG-H
2.0V DC
(typ)
2.0V DC
(typ)
6.8V DC
(typ)
1. Feed the SVGA signal and adjust to make the fol-
lowing PSIG waveform. (TP1201)
7
R/G/B Black
Level Signal
Amplitude
adjustment
1. Select the following group
and subjects.
Group : OUTPUT1
Subject :
On Green adjustment
(G1-BLK)
G1-GAIN
On Red Adjustment
(R1-BLK)
R1-GAIN
On Blue Adjustment
(B1-BLK)
B1-GAIN
2. Make sure the process ad-
justment color bags appear
onscreen.
3. Connect a oscilloscope to
pin(2) of P1302 for the G
setting.
4. Connect the oscilloscope to
pin(1) of P1302 and pin(3)
of P1302 for the R and B
settings, respectively.
White-to-White
Amplitude
1. Select G1-GAIN. Using the set's control switch or
the remote controller's button, adjust the signal am-
plitude to 4.35 Vp-p ± 0.05 V.
2. Now select G1-BLK. Using the set's control switch
or the remote controller's button, adjust the white-
to-white level to 1.10 Vp-p ± 0.05 V.
3. Do the same for the R and B settings.
No.
Adjusting point
Adjusting conditions
Adjusting procedure
27
PG-B10S
8
Panel ghost
adjustment
1. E N B X R   p h a s e   a d j u s t m e n t   ( R - L C D   g h o s t
adjustment)
Increase the setting until the ghost (Note) becomes
visible on the left of the black characters on the R
halftone background.
Decrease the setting by 1 point until the above ghost
disappears.
Lower the setting by another 1 point.
2. ENBXG phase adjustment (G-LCD ghost adjustment)
Take the steps as 1 above on the G halftone
background.
3. ENBXB phase adjustment (B-LCD ghost adjustment)
Take the steps as 1 above on the B halftone
background.
Note: Left-hand ghost ÅcA faint duplicate image of
characters or the like seen 12 dots leftward on a
screen
Reference: The above adjustments are needed
because the EPSON panels may have 1- or 2-point
deviation between the LCD lot productions.
1. Get the SVGA60Hz ghost
test pattern on the project
s c r e e n   ( t h i c k   b l a c k
c h a r a c t e r s   o n   R G B
halftone background).
Group: OUTPUT3
2. Sample hold pulse phase
adjustment
M a k e   s u r e   t h e   R C K -
PHASE setting is 282
(initial value).
M a ke   s u r e   t h e   G C K -
PHASE setting is 282
(initial value).
M a k e   s u r e   t h e   B C K -
PHASE setting is 282
(initial value).
3. ENBX width adjustment
Make sure this setting is
the fixed value of 4 (initial
value).
4. ENBXR phase adjustment
(R-LCD ghost adjustment)
5. ENBXG phase adjustment
(G-LCD ghost adjustment)
6. ENBXB phase adjustment
(B-LCD ghost adjustment)
Make sure these three
settings are all the initial
value of 13.
10
RGB white
balance adjust-
ment
1. Feed the RGB 50% gray
signal. (SVGA)
2. Select the following group
and subjects.
Group : OUTPUT1
Subject : R1-BLK(R)
  B1-BLK(B)
1. Adjust the R1-BLK and B1-BLK(B) settings so that
the chromaticity based on CL200 becomes as
follows (8500K). x=290±5 y=325±5
11
sRGB adjust-
ment
1. Feed the RGB 50% gray
signal. (SVGA)
2. Select the following group
and subjects.
Group : OUTPUT1
Subject : S-R1-BLK
S-B1-BLK
1. Adjust the R1-BLK and B1-BLK(B) settings so that
the chromaticity based on CL200 becomes as
follows (6500K). x=313±5 y=334±5
9
RGB
countervoltage
adjustment
1. Using the remote controller’s button, adjust the
setting so that the flickering be minimum.
2. Adjust the setting so that the image comes to the
center of the screen.
1. Feed the counter voltage
adjustment signal. (SVGA)
2. Select the following group
and subjects.
Group : OUTPUT3
Subject : RC
GC
BC
No.
Adjusting point
Adjusting conditions
Adjusting procedure
28
PG-B10S
17
DTV Color
saturation
adjustment
1. Select the following group
and subject.
Group
: DTV
Subject : Color
1. Check the fixed value.
Color : 0
18
DVD Tint  adjust-
ment
1. Select the following group
and subject.
Group
: DVD
Subject : Tint
1. Check the fixed value.
Tint : 5
19
DVD Color
saturation
adjustment
1. Select the following group
and subject.
Group
: DVD
Subject : Color
1. Check the fixed value.
Color : 0
15
Video
sharpness
adjustment
1. SGroup: VIDEO
Subject: Sharpness
1. Check the preset value.
Sharpness: 3
16
DTV Tint
adjustment
1. Select the following group
and subject.
Group
: DTV
Subject : Tint
1. Check the fixed value.
Tint : 5
13
Video Tint
adjustment
1. Select the following group
and subject.
Group
: VIDEO
Subject : Tint
1. Check the fixed value.
Tint : 128
12
Automatic color
irregularity
correction
1. Apply the automatic color
correction using the auto-
matic color irregularity cor-
rection system.
1. Make sure that no remarkable uneven color remains
on the screen.
14
Video Color
saturation
adjustment
1. Select the following group
and subject.
Group
: VIDEO
Subject : Color
1. Check the fixed value.
Color : 135
20
DVD Sharpness
adjustment
1. Check the fixed value.
Sharpness :1
1. Select the following group
and subject.
Group
: DVD
Subject : Sharpness
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