Panasonic WE-MV180A Service Manual page 10

TP2 (YOUT)
(6) Nega Mode White Level Adjustment
Test Point: TP1 (YIN)
TP2 (YOUT)
Adjust: VR9 (NEGOF)
8
Connect the Oscilloscope to TP2.
8
Trigger the Oscilloscope at TP1.
8
Set the Oscilloscope to DC mode.
8
Adjust VR9 so that the White signal level becomes 3.2 ±
0.1 V DC as shown in Fig. 4-5.
TP2
(YOUT)
(7) Composite Video Output Level Adjustment
Test Point: TP13 (CVOUT)
TP21 (SVYOUT)
Adjust: VR13 (VBSYG)
VR5 (VBSG)
8
Connect the Oscilloscope to TP13.
8
Trigger the Oscilloscope at TP21.
8
Adjust VR13 so that the Luminance signal level becomes
2 x (Vy) ± 0.1 Vp-p as shown in Fig. 4-6.
8
Adjust VR5 so that the Burst signal level becomes 2 x (Vc)
± 30 mVp-p as shown in Fig. 4-6.
Adjust both levels
are coincided
Fig. 4-4
Video Board
Video Board
Video Board
3.2 ± 0.1 V DC
GND Level
Fig. 4-5
Video Board
Video Board
Video Board
Video Board
TP13
(CVOUT)
2 x (Vc) ±
30 mVp-p
(8) Y/C Separator Adjustment
Test Point: TP21 (SVYOUT)
TP22 (SVCOUT)
Adjust: VR10 (YG)
VR3 (CG)
8
Supply 100% Colour Bar signal from Composite signal
output of the Video Signal Generator to the Composite
Video Input Connector 1.
8
Select the Video A/V1 mode by the Input Selector.
8
Connect the Oscilloscope to TP21.
8
Trigger the Oscilloscope at TP21.
8
Adjust VR10 so that the Luminance signal level becomes
2 x (Vy) ± 0.1 Vp-p as shown in Fig. 4-7.
TP21
(SVYOUT)
8
Change the connection of the Oscilloscope to TP22.
8
Adjust VR3 so that the Burst signal level becomes 2 x (Vc)
± 30 mVp-p as shown in Fig. 4-8.
TP22
(SVCOUT)
7
2 x (Vy)
± 0.1 Vp-p
Fig. 4-6
Video Board
Video Board
Video Board
Video Board
2 x (Vy)
± 0.1 Vp-p
Fig. 4-7
2 x (Vc)
± 30 mVp-p
Fig. 4-8