B CUT-OFF (EVR)
Specification :
Refer to descriptions below.
Input :
Video Input Jack,
Crosshatch Pattern Signal,
Monoscope Pattern Signal
Mode :
STOP
Equipment :
Oscilloscope,
NTSC Video Pattern Generator
1. Supply a Crosshatch Pattern Signal to the Video Input Jack.
2. Adjust the FOCUS CONTROL on the Flyback Transformer so that
the "a" and "b" are the sharpest.
Fig. E4-1
3. Supply a Monoscope Pattern Signal to the Video Input Jack.
4. Connect the Oscilloscope to TP50 on the CRT C.B.A.
(Use TP47 for GND.)
5. Select SUB BRIGHT and move the shaded area to the value in EVR
adjustment mode.
6. Turn the SCREEN CONTROL on the Flyback Transformer fully
counterclockwise.
7. Press DISPLAY key on the remote control for collapse scan. (Refer
to "HOW TO ENTER SERVICE MODE.")
8. Adjust SUB BRIGHT in EVR adjustment mode so that the level A is
(170 VDC±5 VDC: For model with 20 inch CRT), or (185 VDC±5 VDC
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