AudioResearch-VS115-pwr-adj 电路图 维修手册.pdf

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1、CAUTION: The VS115 amplifier contains sufficient levels of voltage and current to be lethal. Do not tamper with a component or part inside the unit. Even with the power turned off, a charge remains in the energy storage capaci- tors for some time. Refer any needed service to your autho- rized Audio

2、Research dealer or other qualified technician. Replacement vacuum tubes may be obtained through your authorized retailer or directly from Audio Research Cus- tomer Service. For best performance, the 6550C output tubes should be matched pairs. Additional questions regarding the operation, maintenance

3、 or servicing of your amplifier may be referred to Audio Research Customer Service at (763)-577-9700. Output Tube Bias Adjustment As shipped from the factory, the output “bias” adjustments are set for a nominal 65mA per 6550 tube. Under these idle conditions the tubes are each dissipating approximat

4、ely 27 watts of their 48 watt rating (42 watt plate, 6 watt screen). This point of operation provides “enriched” Class AB1, and will satisfy the most critical listener. For best results, operate and adjust the VS115 at 120VAC. Adjustment must be made under zero-signal conditions after at least 15-20

5、 minutes of uninterrupted stabilization time. A digital voltmeter capable of accurate measurements with 0.lmVDC resolution is preferred for accurate adjustment (must have 31/2digit display). Use the plastic alignment tool provided to make the adjustment. The measurement points are banana test jacks

6、at the rear of the VS115. Ad- just the “bias” for an average voltage reading of 65mVDC (.065 Volt DC) between test jacks. Cleaning To maintain the new appearance of this unit, occasionally wipe the front panel and top cover with a soft, damp (not wet) cloth to remove dust. A mild, non-alkaline soap

7、solu- tion or dilute isopropyl alcohol may be used to remove fingerprints or similar smudges. Cleaners containing abra- sives should notbe used as they will damage the anodized finish of the front panel. A small, soft paint brush is effec- tive in removing dust from bevels, the recessed nameplate an

8、d other features of the front panel. Disposal and Recycling Guidelines To dispose of this electronic product, do not place in land- fill. In accordance with the European Union Waste Electri- cal and Electronic Equipment (WEEE) directive effective August 2005, this product may contain regulated mater

9、ials which upon disposal require special reuse and recycling processing. Limited Warranty Audio Research Corporation products are covered by a 3- Year Limited Warranty, or a 90-Day Limited Warranty (vacuum tubes). This Limited Warranty initiates from the date of purchase, and is limited to the origi

10、nal purchaser, or in the case of demonstration equipment, limited to the balance of warranty remaining after original shipment to the retailer or importer. In the United States, the specific terms, conditions and remedies for fulfillment of this Limited Warranty are listed on the warranty card accom

11、panying the product in its shipping carton, or may be obtained from the authorized retailer or from the Audio Research Customer Service Department. Outside the United States, the authorized importing retailer or distributor has accepted the responsi- bility for warranty of Audio Research products so

12、ld by them. The specific terms and remedies for fulfillment of the Limited Warranty may vary from country to country. Warranty service should normally be obtained from the importing retailer or distributor from whom the product was purchased. In the unlikely event that technical service beyond the a

13、bility of the importer is required, Audio Research will fulfill the terms and conditions of the Limited Warranty. Such product must be returned at the purchasers expense to the Audio Research factory, along with a photocopy of the dated purchase receipt for the product, a written description of the problem(s) encountered, and any infor- mation necessary for return shipment. The cost of return shipment is the responsibility of the purchaser. Model VS115 4 RadioFans.CN 收音机爱 好者资料库