Electrical Setup
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12.
Reduce circular blanking sizeRV206 and adjust circle shape
RV207 (monitor raster set to 3:4 ratio). The circle should be
34.7µs wide and 15.8ms or 13.4ms high (625/525 TV systems
respectively)
13.
Check video at L201 [TP5] and adjust the shading controls to
achieve as flat a signal as possible, in both line and field rates
(RV202, RV205 field and RV203,RV201 line).
14.
Switch to chop mode and set video signal to 1.3V measuring at
L201 [TP5] on the video board adjusting RV204.
15.
Switch to Pan mode and set video signal to 1.3V measuring at
L201 [TP5] on the video board adjusting RV200. [No longer
required].
16.
Turn on flicker suppressor with RV212.
17.
Set period of clock pulse to 43µs measured on pin 11 of V214
[pin 3 of IC13] adjusting RV209.
18.
Adjust RV212 to minimise vertical patterning.
19.
Open circle (RV206) until top and bottom of stored area is
visible. Centralise stored area (RV211). In the case of a 525
line camera only the top stored area will be visible, so RV211
maybe set fully clockwise. Reset circle.
20.
Switch camera to chop mode and adjust RV210 to the centre of
the range where there is no picture noise. [Switch camera to
chop, no adjustment required]
21.
Adjust RV208 to give minimum flicker.
22.
Switch to pan mode. Check "park" position of shutter blade.
Switch to chop, check output of sensor is approximately 3V
measured at R173 [or TP113].
23.
Check sensor output is locked to field rate and swings below 2V
and above 6V measured at R173 [or TP113]. Select R170 for
an error pulse of 0 to 2ms on V108.5 [TP112].
24.
Switch to pan. Check operation of iris and adjust sensitivity
using RV118.
25.
Adjust internal monitor scans and shifts (RV119, L101 RV108
and RV104), for a circular and central image.
