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Symetrix, Inc.
14926 35th Ave West
Lynnwood, WA 98037 USA
voice: (206) 787-3222
fax:
(206) 787-3211
CompuServe: 102102,1126
Model 422
Stereo AGC/Leveler
User's Guide
Revision 1.0, 7 June, 1995
Symetrix part number: 530422
Subject to change at our whim and fancy, without notice.
Copyright 1995, Symetrix, Inc. All rights reserved.
Symetrix is a registered trademark of Symetrix, Inc.
Mention of third-party products is for informational purposes only and
constitutes neither an endorsement nor a recommendation. Symetrix
assumes no responsibility with regard to the performance or use of these
products.
Under copyright laws, no part of this manual may be reproduced or
transmitted in any form or by any means, electronic or mechanical,
including photocopying, scanning, recording or by any information
storage and retrieval system, without permission, in writing, from
Symetrix, Inc.
i
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Summary of Contents for Symetrix 422
- Page 1 Subject to change at our whim and fancy, without notice. Copyright 1995, Symetrix, Inc. All rights reserved. Symetrix is a registered trademark of Symetrix, Inc. Mention of third-party products is for informational purposes only and constitutes neither an endorsement nor a recommendation. Symetrix assumes no responsibility with regard to the performance or use of these products.
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Page 2: Table Of Contents
The PEAK LIMIT control The SYSTEM BYPASS/IN button The INPUT and OUTPUT level meters Troubleshooting Solutions to common problems Less common problems Warranty and Service The Symetrix 422 Limited Warranty Servicing the 422 Return Authorization In-warranty repairs Out-of-warranty repairs Appendix A Specifications... -
Page 3: Introduction
422. We follow this with a troubleshooting guide, warranty and service information, and detailed specifications. As with all Symetrix products, the 422 is intended to provide you with years of trouble free use. Our company is committed to excellence in product design, manufacturing, and customer satis- faction. -
Page 4: Safety Information
422 (i.e. this Caution manual). To prevent electric shock, do not use the polarized plug supplied with the 422 with any extension cord, receptacle, or other outlet unless the blades can be fully inserted to prevent blade exposure. Terms Several notational conventions are used in this manual. -
Page 5: Other Safety Information
Other safety information Power source This product is intended to operate from a power source that does not apply more than 255V rms between the power supply conductors or between either power supply conductor and ground. A protective ground connection, by way of the grounding conductor in the power cord, is essential for safe operation. -
Page 6: Summary Product Description
• The TARGET LEVEL control establishes a nominal gain goal. For signals below the target level the 422 adds gain and boosts them upward. Signals above the target level are reduced in gain (downward towards the target). Front panel view (right) -
Page 7: Rear Panel View
Note For optimum immunity to noise and radio frequency interference we highly recommend connecting the 422 to balanced equipment, where possible. If this is not possible, unbal- anced connections are OK. Unbalanced connections via tip-sleeve (mono) 1/4" plugs are easy to make via the 422's 1/4" input and output connectors. -
Page 10: Operation
This section describes in detail the functions of the 422's front panel controls and LED indicators. The TARGET LEVEL control When setting up the 422, this is generally the control that you should adjust first. The TARGET LEVEL control does just what the name implies. It establishes the volume where you want it. -
Page 11: The Peak Limit Control
(via relays) to the 422's outputs, thereby bypassing any internal circuitry. In BYPASS mode the front panel rotary controls have no effect on the operation of the 422. A red LED indicates BYPASS status, while a green LED indicates IN status. The INPUT and OUTPUT level meters The INPUT and OUTPUT level meters are calibrated in VU (volume units). -
Page 12: Troubleshooting
Check the AC power connections to the 422. Check input and output cables and connections. Determine that there really is a signal coming from the source and that it is getting to the 422. Distortion in the output signal Check the input signal. Is it overdriving the 422's input? Is the incoming signal already distorted? Listen 'up stream' from the 422 (or manually place the unit in BYPASS mode) to determine that you are feeding it a clean signal. -
Page 13: Warranty And Service
In no event will Symetrix be liable for any inciden- tal or consequential damages including but not limited to damage for loss of revenue, cost of... -
Page 14: Servicing The 422
Servicing the 422 If you have determined that your 422 requires repair services and you live outside of the United States please contact your local Symetrix dealer or distributor for instructions on how to obtain service. If you reside in the U.S. then proceed as follows. -
Page 15: Appendix A Specifications
The AGC/Leveler shall be capable of operating by means of its own built-in power supply connected to 117V nominal ac (105 to 130V) 50/60 Hz and 230V nominal ac (207 to 253V ac). The AGC/Leveler shall be listed by Underwriters Laboratories, Inc. (UL) . The AGC/Leveler shall be a Symetrix, Incorporated model 422 Stereo AGC-Leveler. Technical specifications Audio... -
Page 16: Remote Bypass Wiring
We highly recommend that shielded wire be used to connect the switch to the 422 so as to minimize the possibility of intro- ducing any radio frequency interference into the 422. The external 1/4" audio plug should be of the tip-sleeve type (often referred to as a 'mono' plug).
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