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Il service manual molto accurato. Rapidi nella risposta
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Quick site processing. A complete and very useful manual with all details. Thank you!
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Quick service response. A useful and very rare service manual with all details. I recomend this service.
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I ordered this manual sometime in the afternoon and I received it on my e-mail the same evening.
This is a fantastically good and properly scanned copy of the original manual. All pages are of the same scale and they overlap each other. It means that you can print the manual and easily make it as a convenient paper manual.
The content of the manual is fantastic. Alignment descriptions, PCB layouts and elementary diagrams are explicit and precise. I immediately found what I was looking for. Thanks to this manual and Owner-Manuals.com my amplifier is alive again. Many thanx indded!
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The manual was well-scanned and easy to read. As an added bonus, the Operator's Manual was bundled with the Service Manual!
I'd definitely use owner-manuals.com again.
external programming rheostat or potentiometer should be a wirewound device with a temperature coefficient o� 30 ppm or better. The potentiometer must be capable of carrying ? . 3 m a or more. It is also recommended that the programming lead be shielded and the shield connected to the ground of the supply. See Figures 3 and 5 . CAUTION: 1. If the Programming terminals are open circuited the output voltage will rise well in excess of 320 volts and damage to the supply may result if operated in this condition over a prolonged period. 2 A rapid turndown of the programming potentiometer, internal or external, may burn out the potentiometer. It is recommended that the programming potentiometer be turned down no faster than the voltage needle falls on the front panel meter
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SPECIAL CONSIDERATIONS PROGRAMMING RESISTANCE
It has previously been warned that a rapid turndown could damage the programming potentiometer. While it is unlikely that t h e internal programming potentiometer will be burned out by even an instantaneous turndown from 320 volts to zero, it is possible to overheat the lower resistance region of the resistance element and thus cause it to become noisy at the low end. Mrhen the supply is heavily loaded a reasonably rapid turndown will not be detrimental to the potentiometer.
PROGRAMMING RATES
The maximum safe rising programming rate is about 50 volts/ sec. The maximum falling programming rate is determined by the load current and the supply capacitance. A t heavy output currents down programming rates up to 50 volts/second are feasible whereas at low voltage and no load the down programming rate may be as low as 1/2 volt/second.
SHORTING THE SUPPLY
The supply is designed only to sustain a shortcircuit across the load terminals. Inadvertent shorts between one of t h e output terminals and the sensing on the A terminals will result in the failure of the instrument. It is important to insure that the sensing terminals are tight and that the shorting occurs on the output terminal leads and not on the sensing leads.
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