G2 Adjustment - Sony TRINITRON PVM-14L2 Service Manual

Picture size specifications
14-inch
4 : 3 normal scan
H : 14.9 ± 0.2 frames
V : 9.3 ± 0.2 frames
4 : 3 under scan
H : 252 ± 2 mm
V : 188 ± 2 mm
16 : 9 normal scan
H : 14.9 ± 0.2 frames
V : 167 ± 2 mm
16 : 9 under scan
H : 252 ± 2 mm
V : 142 ± 2 mm
H. SIZE : Adjust H. SIZE so that the crossing point of the
second horizontal line (from the top and from
the bottom) and the small circle in the corners
agrees with the very ends of the effective picture
size.
V. SIZE : Adjust V. SIZE so that 1/3 of the frame of the
third largest circle in the center, should be
hidden by the effective screen area both in the
top and bottom. (Because the crossing points
have the line width, select inside of the line
width for adjustment.)
1.5 frames
Center
PVM-14L2/20L2
20-inch
H : 14.9 ± 0.2 frames
V : 9.3 ± 0.2 frames
H : 364 ± 2 mm
V : 272 ± 2 mm
H : 14.9 ± 0.2 frames
V : 242 ± 2 mm
H : 364 ± 2 mm
V : 205 ± 2 mm
Center
1.5 frames

2-15. G2 Adjustment

Conditions
CONTRAST and BRIGHT : PRESET positions
1. Input a (480/60I) all-black signal to the COMPO-
NENT Y IN connector.
2. Select the cathode that shows the highest pedestal level
among the red, green and blue cathodes.
3. Connect probe of an oscilloscope as indicated below.
Adjust RV709 on the C board so that the pedestal level
becomes standard value as shown.
RED : TP701 or KR
GREEN : TP702 or KG
BLUE : TP703 or KB
GND : TP700
A
0 V
DC
Standard value A = 175
Standard value A = 150
Fig. 2-27
Pedestal level
±
2 V (14 inch)
DC
±
2 V (20 inch)
DC
2-15