Preston Electronics, LLC

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The service order form is available in PDF format. Print the form and fill in the information. Please read through the information below before or while completing the form. The links are at the end of the document.


If you will please complete the information requested, it will help us to repair your equipment properly in the shortest amount of time.

Owner: If it belongs to a company or organization, put that name here. Use the Contact: field for the name of the person who is most familiar with the nature of the problem.

Address: This is especially important for warranty claims.

Phone: We need to be able to contact you to deliver a cost estimate or if more information is needed about the nature of the symptoms. E-mail may be used if you are out of our local calling area or if we have trouble reaching you by phone.

Physical damage: Please note any missing parts, rips, noticeable dents or other physical damage not related to the repair.

Accessories/included items: Please include items needed to operate the equipment such as power adapters, special disks/media, cables, etc. Detachable power cables are not needed if they are the standard 3-prong computer type. Any other type should be included. Remove and keep any other items not related to the equipment. We will not be responsible for the loss of such items.

Symptoms: VERY IMPORTANT! We must be able to duplicate the symptoms in order to repair the unit. Please describe the nature of the failure and the settings needed to demonstrate the symptoms. (DON'T use the word 'short'!) If the problem is intermittent ('cuts in and out') please make special mention of it along with a description of what causes the symptom to appear. Use the comments section if you need more space.

Item Type: Basic description of the unit: 'amp head', 'Combo', 'keyboard', etc.

Model, serial: Important in case the tag gets separated from the unit, or if another similar unit is in the shop.

Warranty/Non-warranty: Please indicate clearly.

Warranty repairs require your original purchase receipt or a good quality copy. If you cannot supply the purchase receipt, you will be charged for the repair. In most cases, the warranty only applies to the original purchaser of the new unit. Units purchased 'pre-owned' or used are not covered by manufacturer's warranty.

Non-warranty: If the unit is non-warranty, please state a 'call me' amount. If it appears the cost will exceed that amount, you will be contacted for approval. (See "Repair Cost" for typical charges)

Insured value: (Write in) If you are shipping the equipment to us, please indicate the amount you wish us to insure it for on the return shipment. If we need to file a claim, you must be able to provide documentation to support the amount claimed. See Shipping Notes

Warranty Limitations: Please be aware that there are several limitations on manufacturer's warranties. You may still be charged in some cases even if the equipment is within the warranty period.
* If the symptoms cannot be duplicated at the service center, a bench test fee will be charged to the owner. 
* Shipping costs to the service center are the responsibility of the owner.
* You may also be charged for shipping expense for warranty repair parts.
* Most manufacturers only warrant vacuum tubes for 90 days and speakers for one year from date of purchase. If a tube or speaker is found to have failed after these periods, you will be charged for the diagnosis and the parts.
* Claims for speakers may be denied if the damage appears to have been caused by applying excessive power or if an external amplifier failure destroyed the speaker.
* Manufacturers also do not cover physical damage such as broken knobs, bent or broken control shafts, and broken jacks.
The governing question is "Was this failure caused by a manufacturing defect?" 

Repair time: Typical repairs will take from two to four weeks, or more if parts need to be ordered. Manufacturers require that warranty repairs be performed using parts supplied by them, so most cases will require that parts be ordered, increasing the repair time. If you need the equipment sooner, additional costs may be incurred such as air freight charges and an additional service surcharge to expedite the process. Even under urgent conditions, timing often depends on the promptness of several other people, so no guarantees can be made for completion by a specific date. Equipment should be brought directly to the service center for these cases. Contact the service center to arrange for urgent service.

Repair cost: Typical post-warranty repairs cost approximately $100 - $175. Solid state high power amplifiers with shorted output stages often cost $200 - $250 or more. (If it blows the fuse, this is very likely the problem.) Please tell us the cost limit for pre-approved repair. If it appears that it will be greater than that amount we will call you with an estimate. Estimates are approximate and may be revised. A declined estimate (not repaired) will be charged for at least 1/2 hour ($40). Minimum charge is 1/2 hour for minor repairs. If the symptoms cannot be duplicated at the service center, a bench test fee will be charged to the owner, even if it is under warranty. (Manufacturers do not cover such cases.)


Download or view the .pdf service order  (Requires Adobe Acrobat Reader)

(If you need to create service orders for several units, contact us for the fillable spreadsheet file.)