Adjustment - Pioneer PRO-730HDI Service Manual

1

7.7 ADJUSTMENT

A
1
Brightness Adjustment
Start
(DOWN)
B
C
Cut off level
(180V DC)
GND
G CRT
DRIVE
ASSY
D TP-GK
Cut off level
(180V DC)
GND
E
R CRT
DRIVE
ASSY
TP-RK
F
98
1
2
1st FAC
Input signal : Black Burst (INPUT 1)
STD
b
CUT–R
Telop: Blue
Data value
CH1 CH2
(X) (Y)
Oscilloscope
VR5101
CH1 CH2
(X) (Y)
Oscilloscope
2
3
0
b
0
: CUT-R
0
: CUT-G
: CUT-B
Cut off level
(180V DC)
GND
or
B CRT
DRIVE
ASSY
TP-BK
R CRT
DRIVE
ASSY
When the DEFLECTION SERVICE Assy or VIDEO UCOM
SERVICE Assy is replaced, check the following to confirm if
the above adjustment is necessary:
(1) Make a note of the data of CUT R, CUT G, CUT B, and
BRIGHT. (1st FAC) ( ∞ DOWN)
(2) Input "0" as parameters for (1) and check TP-RK, TP-GK
and TP-BK of the CRT DRIVE assembly. If the levels are
within 180 V ±5 V, the adjustment is not necessary.
Input the noted data.
If the levels are not within the above level, proceed with
the above adjustment.
PRO-730HDI
3
4
Black burst
STD OFFSET
4
BRIGHT
B CRT
DRIVE
ASSY
VR5201
CH1 CH2
(X) (Y)
Oscilloscope
4