Panasonic M-900 Series, Руководство по обслуживанию

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-900 x X X Series
-1200 X X X Series
• Horizontal width Adjustment
Ad just the horizontal width coil ( L403) to set the proper
width of the active character area as shown in Fig. 6.
1160mm) :,--1-....;...:-'F"'-
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f
Horizontal
9"Model 6.30" 1
-12"Model 8.46":
(215mm)
1 --�- Correct
Horizontal size
Fig.6
• Vertical Linearity Adjustment
Adjust (VR33) for uniform character height within the
active character area as shown in Fig. 7.
A
B
Fig. 7
•Centering Magnet Adjustments
Rotate the centering magnet tabs away from each other
until the character area is centered on the screen as shown
in Fig.8.
Beforethis adjustment, be sure to ascertain H. hold.
M
Fig.8
Raster area
a'
Centering
a = a'
b = b'
• Focus Control Adjustment
Adjust (VR64) until optimum focus is seen on the charac­
ters displayed within the active character area.
• Sub Brightness Adjustment
Look at a place 30cm distant from the CRT surface and set
at a point where the raster slightly comes out, with the
brightness VR (Customer) set at MAX. In this case, fully
rotate Pedestal Level clockwise. (Contrast of characters
minimizes.)
• Brightness Adjustment (Customer Supply)
Controls the brightness of the raster by means of the
external control VR (Customer Supply). Picture brightness
is set at 40 lux before leaving the factory.
• Sub Contrast Adjustment (composite type only)
Connect an oscilloscope (with low capacity probe) to th3
R174as shown in Fig.9.
Then adjust VR11 to obtain 3.0Vp-p.
ffi
0
o
O
o
0
0
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0
oscilloscope
Fig. 9
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J IT
• Pedestal Level Adjustment (composite type only)
After the adjustment of sub-brightness and sub-contrast,
connect an oscil loscope (with low capacity probe) to the
R 144 as shown in Fig. 10.
Then ad just VR 12 to obtain 1 0V DC.
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0
0
0
0 0 0
@@
0
oscilloscope
Fig.10
-15-