Sharp AN-60KT, Service Manual

Page: 23 / 174

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.