Overview
Purpose and scope
This service manual is a reference for corrective service procedures for the Welch Allyn GS 777
Wall Transformer. It is intended for use only by trained and qualified service personnel.
Corrective service is supported to the level of field-replaceable units. These include circuit-board assemblies and some subassemblies, case parts, and other parts.
WARNING When performing a service procedure, follow the instructions exactly as presented in this manual. Failure to do so could damage the device, invalidate the product warranty, and lead to serious personal injury.
Caution No component-level repair of circuit boards and subassemblies is supported. Use only the repair procedures described in this manual.
This manual applies only to this device. For servicing of any other device, see the service manual for the specific device.
Service work not described in this manual must be performed by qualified service personnel at the factory or at an authorized Welch Allyn service center.
Technical support services
Welch Allyn offers the following technical support services:
• Telephone support
• Replacement service parts
• Product service
For information on any of these services, call the Welch Allyn Service Center nearest you.
Service options
Warranty service
All repairs on products under warranty must be performed or approved by Welch Allyn. Refer all warranty service to Welch Allyn Product Service or another authorized Welch Allyn Service
Center. Obtain a Return Material Authorization (RMA) number for all returns to Welch Allyn
Product Service.
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6 Overview Welch Allyn GS 777 Wall Transformer
Caution Unauthorized repairs will void the product warranty.
Non-warranty service
Welch Allyn product service and authorized service centers support non-warranty repairs. Contact any Welch Allyn regional service center for pricing and service options.
Welch Allyn offers modular repair parts for sale to support non-warranty service. This service must be performed only by qualified end-user biomedical/clinical engineers using this service manual.
Repairs
A Welch Allyn Service Center must perform all repairs on products under warranty.
Caution Unauthorized repairs will void the product warranty.
Qualified service personnel or a Welch Allyn Service Center should repair products out of warranty.
If you are advised to return a product to Welch Allyn for repair or routine maintenance, schedule the repair with the service center nearest you.
Welch Allyn Technical Support
If you have a problem with the device that you cannot resolve, call the Welch Allyn Technical
Support Center nearest you for assistance. A representative will assist you in troubleshooting the problem and will make every effort to solve the problem over the phone, avoiding a potential unnecessary return.
If your product requires warranty or non-warranty repair service, a Welch Allyn Technical Support representative will record all necessary information to issue an RMA number. The support representative will provide you with the address of the Welch Allyn Service Center to send your device to.
Technical support is available during local business hours.
Returning products
Note
Welch Allyn does not accept returned products without an RMA.
When returning a product to Welch Allyn for service, please include the following information:
• A complete return shipping address.
• A contact name and phone number.
• Any special shipping instructions.
• A purchase-order number or credit-card number if the product is not covered by a warranty.
• A full description of the problem or service request.
1. Contact Welch Allyn and request a Return Material Authorization number.
2. Ship the device to Welch Allyn, observing these packing guidelines: a. Put the system and a packing list into the original shipping carton with the original packing materials or into another appropriate shipping carton.
Service manual Overview 7 b. Write the Welch Allyn RMA number with the Welch Allyn address on the outside of the shipping carton.
Note
To ensure safe receipt of your system by the service center and to expedite processing and return of the system to you,thoroughly
clean all residues from the device before you ship it to
Welch Allyn. For decontamination and cleaning requirements, see
“Decontamination and cleaning” in the appendices.
If a returned device is found to be contaminated with bodily fluids, it will be returned at the owner’s expense. United States federal regulations prohibit the processing of any device contaminated with blood-borne pathogens. Welch Allyn thoroughly cleans all returned systems on receipt, but any system that cannot be adequately cleaned cannot be repaired.
8 Overview Welch Allyn GS 777 Wall Transformer
