Sharp Notevision PG-M25X, Service Manual

Page: 23 / 182

23
PG-M25X
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 Frequency adjust-
ment 1. Turn on the power.
2. Adjust the frequency at TP5801 to
12800000±40 Hz.
1. Be sure to keep on power.
2. Take the frequency reading at TP5801
and readjust the trimmer capacitor
(C5835), as required, to the speci-
fied frequency level.
17 Frequency check-
ing 1. Turn on the power. 1. Make sure the frequency at TP5801
is 12800000±40 Hz.
18 W/A selection
checking 1. Set the W/A terminal to the "L" level.
2. Connect the wired remote control
cable between the set and the re-
mote controller.
3. Make sure the remote controller func-
tions as specified.
19 Output waveform
checking Send the signal using the remote con-
troller that is for the North American
and European markets. Watch the oscilloscope screen to make
sure the serial data output is as speci-
fied.
20 Hooked-up in-
spection Hook up the unit to the projector. Make
sure that the remote controlled regis-
tration functions well and that the
pointer moves accordingly. Gyro remote controller perfor mance
checking.