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- Technical Note: TN008
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- Date: 17 April 1986
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- Re: STM UHF Modulator Adjustment
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- The UHF TV output may not appear central on some TV sets, slight
- modulator adjustment should correct inconsistent positioning.
- Proceed as follows:-
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-
-
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- 1. Only Qualified service personnel should attempt to carry
- out the following procedure on the 520STFM and 1040STFM
- as mains voltage exists within these models.
-
- 2. Remove plastic cover and R.F. shield
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- 3. Remove modulator shield
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- 4. Apply power and adjust the plastic cross head screw on
- the modulator PCB until the display is central.
-
- 5. Replace shields and all screws.
-
-
- As well as producing a modulated output, the STM also provides an
- un-modulated composite colour output on pin 2 of its 13-pin Din
- socket which connects to pin 20 of the Atari Scart Connector.
-
- -END-
-