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Ok, pulled the SAMS (100-1) and ammending my above, You disable the AFC by removing plate voltage from V14 pin 2. (Disconnect the wiper on the horiz hold control) adjust the HORIZ FREQ for a single image. This is a Synchroguide type circuit, and the adjustment procedure can be found on the web.. (Usually, they start with jumpering the sinewave coil, in this case jumper across R72)
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