PG-M20S (serv.man10). Electrical adjustment - Sharp Projector Service Manual (repair manual)

pg-m20s (serv.man10) service manual
Model
PG-M20S (serv.man10)
Pages
7
Size
25.68 KB
Type
PDF
Document
Service Manual
Brand
Device
Projector / Electrical adjustment
File
pg-m20s-sm10.pdf
Date

Read Sharp PG-M20S (serv.man10) Service Manual online

21
PG-M20S
PG-M20X
ELECTRICAL ADJUSTMENT
1
Initialization of
EEPROM
1. Turn on the power (the lamp lights
up) and warm up the system for 15
minutes.
No.
Adjustment Items
Adjustment Conditions
Adjustment Procedures
1. Carry out the following setting.
Press SW2001 to enter the process
mode, and execute S2 on SSS menu.
2
Adjustment of CW
index
1. Signal input: 64-step color bar
2. Select the following group and sub-
ject.
Group: DLP
Subject: Select CW-INDEX.
1. Feed the signal to INPUT 1.
2. Select subject and make adjustment
so that the lamp gradation patterns
of R, G and B should be smooth with-
out noise.
R
G
B
3
Adjustment of
RGB gradation
reproduction
1. Feed the SMPTE pattern signal.
2. Select the following group and sub-
ject.
Group: DLP
Subject: G1-GAIN
1. Confirm that 100% and 95% white
gradation, and 0% and 5% black gra-
dation are discernible.
2. If the white gradation looks differently,
do fine adjustment by G1-GAIN.
4
Adjustment of
video brightness/
contrast
1. Feed the NTSC100% window pat-
ter signal. (Burst signal)
2. Select the following group and sub-
ject.
Group: VIDEO
Subject: AUTO
1. After signal input, select AUTO us-
ing the set's switch or the remote
controller's button for automatic ad-
justment.
5
Adjustment of
video tint
1. Feed the split color bar signal.
2. Select the following group and sub-
ject.
Group: VIDEO
Subject: TINT
1. Confirm the fixed value.
Fixed value: 128
22
PG-M20S
PG-M20X
6
Adjustment of
NTSC color
saturation
1. Feed the internal 8ch (split color bar)
signal.
2. Select the following group and sub-
ject.
Group: VIDEO
Subject: N-COLOR
No.
Adjustment Items
Adjustment Conditions
Adjustment Procedures
1. Confirm the fixed value.
Fixed value: 59
7
Adjustment of PAL
color saturation
1. Feed the PAL color bar signal.
2. Select the following group and sub-
ject.
Group: VIDEO
Subject: P-COLOR
1. Confirm the fixed value.
Fixed value: 59
8
Adjustment of
SECAM color
saturation
1. Feed the SECAM color bar signal.
2. Select the following group and sub-
ject.
Group: VIDEO
Subject: S-COLOR
1. Confirm the fixed value.
Fixed value: 59
9
Adjustment of
COMPO G bright-
ness
1. Input signal: 0% gray pattern sig-
nal (480I)
2. Select the following group and sub-
ject.
Group: COMPO
Subject: G-BRIGHT
1. Feed the signal to INPUT 1.
Make adjustment so that some bits
should be missing in the picture.
10
Adjustment of
COMP CR-Offset
1. Feed the color difference signal
(480I): Y 0% brightness, Cb and Cr
0% white patterns.
Group: COMPO
Subject: AUTO
1. After signal input, select AUTO us-
ing the set's switch or the remote
controller's button for automatic ad-
justment.
11
Automatic Adjust-
ment of RGB
white balance
1. Feed the 50% gray pattern signal
(XGA, 60 Hz [PG-M20X]/SVGA,60
Hz [PG-M20S]).
2. Select the following group and sub-
ject.
Group: DLP
Subjects: R1-GAIN (Red)
B1-GAIN (Blue)
1. Adjust R-1 GAIN and B1-GAIN so that
x-value should be 266±3 and y-value
320±3.
12
Automatic Adjust-
ment of SRGB
white balance
1. Feed the 50% gray pattern signal
(XGA, 60 Hz [PG-M20X]/SVGA,60
Hz [PG-M20S]).
2. Select the following group and sub-
ject.
Group: DLP
Subjects: S-R1-GAIN  (Red)
S-G1-GAIN  (Green)
S-B1-GAIN  (Blue)
1. Set the value of S-R1-GAIN to 34.
2. Adjust S-G1-GAIN and S-B1-GAIN
so that x-value should be 310±3 and
y-value 335±3.
23
PG-M20S
PG-M20X
13
Automatic adjust-
ment of video
white balance
1. Feed the 50% gray pattern signal
(NTSC, burst signal).
2. Select the following group and sub-
ject.
Group: DLP
Subjects: V-R1-GAIN  (Red)
V-B1-GAIN  (Blue)
No.
Adjustment Items
Adjustment Conditions
Adjustment Procedures
1. Adjust V-R1-GAIN and V-B1-GAIN so
that x-value should be 265±3 and y-
value should be 298±3.
14
Automatic adjust-
ment of DTV white
balance
1. Feed the 50% gray pattern signal
(480I, color difference signal).
2. Select the following group and sub-
ject.
Group: DLP
Subjects: C-R1-GAIN
C-B1-GAIN
1. Adjust C-R1-GAIN and C-B1-GAIN
so that x-value should be 263±3 and
y-value should be 295±3.
15
Adjustment of
DLP voltage (For
reference)
1. Read voltage rank of DLP descrip-
tion.
2. Set the switch corresponding to the
rank which has been read. (on the
formatter PWB)
1. Carry out adjustment when DLP chip
has been replaced or combination of
chip and formatter has been changed.
2. Rank:
B C D E
Setting  value: 1 2 3 4
16
Confirmation and
re-adjustment of
white balance
1. The adjusting conditions for each
item are as follows:
For RGB input, see Item 11
For SRGB input, see Item 13
For video input, see Item 14
For DVT input, see Item 12
Confirm that there is no deviation in white
balance from that of the monitoring
equipment.
For readjustment, proceed in the order
of RGB input, video input and DTV in-
put.
17
Confirmation of
color-related
operation
1. Receive the color bar signal.
1. Select L1 in the process mode.
Check the performance of color and
tint.
18
Confirmation of
picture-related
operation
1. Receive monoscope pattern signal.
1. Select L2 in the process mode.
Check Picture, Brightness and Sharp-
ness.
19
Confirmation of
RGB
1. Receive the RGB signal.
1. Select L4 on the process mode.
Check Picture, Brightness, Red, Blue,
Clock, Phase, H-POS and V-POS.
20
Confirmation of
off-timer operation
1. Select OFF in the process mode.
Confirm that the off-timer starts with
5-minute display, counts 1 minute for
1 second, and turns off when 0 minute
is displayed.
21
Confirmation of
thermistor opera-
tion
1. Heat the thermistor by dryer.
1. Confirm that the temperature is dis-
played.
24
PG-M20S
PG-M20X
22
Automatic sync
operation
1. Receive the phase checking pattern
signal.
No.
Adjustment Items
Adjustment Conditions
Adjustment Procedures
1. Confirm that Clock, Phase, H-POS
and V-POS can be automatically
adjusted in the VGA/S-VGA/XGA
mode.
23
Confirmation of
USB operation
Connect the set to a personal computer
by USB cable.
Using the remote controller, make sure
that feed and return operations are ef-
fective on the display of the personal
computer.
24
Factory settings
1. Make the following settings.
Process
Remote controller
adjustment
 settings
S4
"Factory Setting 4"
How to Adjust the PC I/F unit
1. Initialization of EEPROM
1) Press SW2002 to enter the process mode.
2) Execute S1 on the SSS menu. (By S1, all the contents of EEPROM are initialized.)
3) Confirm that the program version "Ver. XXX" has become the latest one
2. Adjusting items
1) Adjustment of RGB drive/gain
(1) feed the window pattern signal that has 100% and 0% signals.
(2) Select AUTO among the A/D items in the process mode and carry out adjustment.
Page of 7
Display

Download Sharp PG-M20S (serv.man10) Service Manual (Repair Manual)

Here you can read online and download Sharp PG-M20S (serv.man10) Service Manual in PDF. PG-M20S (serv.man10) service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sharp PG-M20S (serv.man10) 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.