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Excellent!! Got what I need and very fast!! Thank You
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Manual acquired with good resolution, complete in all its pages, very good policy of the folder where are saved all products purchased.
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Service manual very complete and clear. It was very helpfull for my work.
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This is the 2nd time I download manuals from this website and I can say it's what I was expecting. It contains schematic, layout (decent quality), short description, parts and dissasembly instructions. I recomend it for anyone who wants to repair/modify this device.
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Very useful Service Manual! With it I was able to identify the damaged pots in my old amplifier, purchase the adequate replacements and make myself the repair.
I have again my old amplifier, still a very good one that I will keep for as many years as I can!
Thanks to Owner Manuals!
4-7. CONTROL circuits
(1) HORIZONTAL / VERTICAL OSCILLATION circuit The sync signal input to IC301 is phase-sifted and converted to the waveform in IC301. The pulse synchronized with the horizontal sync signal is output from pin 17 as horizontal drive pulse. The sawtooth wave synchronized with the vertical sync signal is output from pin 4. The pulse output from pin 17 generates a frequency locked to the input signal under the following conditions:
Q The horizontal sync signal is input to pin 26. R The vertical sync signal is input to pin 27. S The feedback pulse (AFC pulse) of the HORIZONTAL DEFLECTION OUTPUT circuit is input to pin 18.
IC301 is auto-sync system and adjusts the horizontal frequency automatically make the vertical sync signal input to pin 27 trigger. In case that the AFC pulse is not input, the output pulse from pin 17 is unlocked and the horizontal picture size changes with keeping it small.
IC301 pin 26: Horizontal sync signal input
IC301 pin 17: H-DRIVE pulse output
IC301 pin 18: AFC pulse input (Threshold level: approx. 2V)
Center voltage: 3.5V
IC301 pin 4: V-sawtooth wave output
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