Pioneer PRO-720HD Service Manual page 23

8
Panel Adjustment
Start
1st FAC
TV CBL VCR DVD
TV /SAT /LD
/DTV
TV
INPUT
1 2 3 4
ADJUSTMENT
CH
SPLIT SEARCH SELECT
SCREEN SUB CH
MODE ANT FREEZE
DISPLAY
1 2 3
RETURN
4 5 6
7 8 9
CH
0
ENTER
¢
CH
RETURN
CH VOL
MUTING
4
EDIT/ TV/SAT/DVD DTV/DVD TOP
LEARN MENU MENU
SOURCE DTV/SAT
5
POWER GUIDE
2 SET/ 3
ENTER DTV/(SAT)
8
∞ INFO
VCR REC
FAVORITE CH
1 7 3 ¡
RECEIVER
INPUT VOL VOL Telop : White
Î
HDTV PROJECTION MONITOR
Procedures
1 Send the black-burst signal to the INPUT 1 connector.
Enter Adjustment mode by following the procedures described above.
2 With BRIGHT, adjust the gray part (panel) of the screen.
By observing TP5151 of the GREEN CRT DRIVE assembly with the oscilloscope, , adjust the brightness level which is low by 20V
from Black level of the main screen.
210V
Approx. 20V
GND
3 Switch the input signal to a 100%-white signal.
Adjust the panel part and the main screen with CONTRAST.
Observe the same site as described in Step 2 above, and adjust the amplitude of the luminosity.
Adjust so that the level of the luminosity of the panel and that of the main screen become the same.
• Mode for adjusting the brightness, contrast LEFT and RIGHT of the
gray part (panel) of the 4:3 normal screen.
<Data value section>
PANEL
BRIGHT –24
Data value
<Adjustment item section>
31.7µS
Main screen
(black)
Panel part: The level of this part changes with the BRIGHT data.
Approx. 0V
Main screen
(white)
The level of the panel part changes with the CONTRAST data.
The level of the main screen heightens or lowers in the reverse direction.
PRO-720HD, PRO-620HD, PRO-520HD
VOL
or
1 2 3
1
4
2
3
4
: BRIGHT (–64 to 63)
: CONTRAST (–64 to 63)
: LEFT (–128 to 127)
: RIGHT (–128 to 127)
205