Scan Rotation
ASSY-Number: A0-852382
Location: In the ceiling of the control console (See the map page.).
Status:
- Initial: Unknown, dials work
- 04.09.2018: Rotation seems to work, as confirmed by observation of X-Y via oscilloscope.
- 04.09.2018: Either connector P135 or solder joints on dials have a buggy contact.
- 18.09.2018: Could not reproduce buggy contact, but sometimes after upstart hundred number shows wrong data until 359 overflow.
Image
Connections
| Socket | Cable | Target | Socket |
|---|---|---|---|
| P135 | 135 | Dials for scan rotation | |
| PL91 | 91 | Power Regulator PCB | PL91 Out |
| SKT35 In | 35B | Scan Generator | SKT35 |
| SKT36 In | 36B | Beam Modulation | SKT36 TILT Out |
| SKT35 Out | 35B | Column Scan Amplifier | SKT35 |
| SKT36 Out | 36B | Column Scan Amplifier | SKT36 |
Function
Rotate the grid to be scanned around the vertical axis.
The input Line and Frame lines get rotated into the X and Y position of the scanning dot:
Xout = cos(theta)*Line + sin(theta)*Frame
Yout = -sin(theta)*Line + cos(theta)*Frame