Telex MCE325 User Manual

USER INSTRUCTIONS

MODEL MCE325

PROGRAMMABLE USER STATION

9350-6464-00 Rev J, 7/2001

PROPRIETARY NOTICE

The RTS product information and design disclosed herein were originated by and are the property of Telex Com­munications, Inc. telex reserves all patent, proprietary design, manufacturing, reproduction, use and sales rights
thereto, and to any article disclosed therein, except to the extent rights are expressly granted to others.

COPYRIGHT NOTICE

Copyright © 1995-2001 by Telex Communications, Inc. All rights reserved. Reproduction in whole or in part with­out prior written permission from Telex is prohibited.

UNPACKING AND INSPECTION

Immediately upon receipt of the equipment, inspect the shipping container and the contents carefully for any dis­crepancies or damage. Should there be any, notify the freight company and the dealer at once.

WARRANTY INFORMATION

RTS products are warranted by Telex Communications, Inc. to be free from defects in materials and workmanship
for a period of three years from the date of sale.

The sole obligation of Telex during the warranty period is to provide, without charge, parts and labor necessary to
remedy covered defects appearing in products returned prepaid to Telex. This warranty does not cover any defect,
malfunction or failure caused beyond the control of Telex, including unreasonable or negligent operation, abuse,
accident, failure to follow instructions in the Service Manual or the User Manual, defective or improper associated
equipment, attempts at modification and repair not authorized by Telex, and shipping damage. Products with their
serial numbers removed or effaced are not covered by this warranty.

To obtain warranty service, follow the procedures entitled “Procedure For Returns” and “Shipping to Manufacturer
for Repair or Adjustment”.

This warranty is the sole and exclusive express warranty given with respect to RTS products. It is the responsibility
of the user to determine before purchase that this product is suitable for the user's intended purpose.

ANY AND ALL IMPLIED WARRANTIES, INCLUDING THE IMPLIED WARRANTY OF MERCHANT­ABILITY ARE LIMITED TO THE DURATION OF THIS EXPRESS LIMITED WARRANTY.

NEITHER TELEX NOR THE DEALER WHO SELLS RTS PRODUCTS IS LIABLE FOR INCIDENTAL OR
CONSEQUENTIAL DAMAGES OF ANY KIND.

CUSTOMER SUPPORT

Technical questions should be directed to:

Customer Service Department
RTS/Telex
12000 Portland Avenue South
Burnsville, MN 55337 U.S.A.
Telephone: [phone]
Fax: [phone]

RETURN SHIPPING INSTRUCTIONS

PROCEDURE FOR RETURNS

If a repair is necessary, contact the dealer where this unit was purchased.

If repair through the dealer is not possible, obtain a RETURN AUTHORIZATION from:

Customer Service Department
Telex Communications, Inc.
Telephone: [phone]
Fax: [phone]

DO NOT RETURN ANY EQUIPMENT DIRECTLY TO THE FACTORY WITHOUT FIRST OBTAINING A
RETURN AUTHORIZATION.

Be prepared to provide the company name, address, phone number, a person to contact regarding the repair, the type
and quantity of equipment, a description of the problem and the serial number(s).

SHIPPING TO MANUFACTURER FOR REPAIR OR ADJUSTMENT

All shipments of RTS products should be made via United Parcel Service or the best available shipper, prepaid. The
equipment should be shipped in the original packing carton; if that is not available, use any suitable container that is
rigid and of adequate size. If a substitute container is used, the equipment should be wrapped in paper and surrounded
with at least four inches of excelsior or similar shock-absorbing material. All shipments must be sent to the following
address and must include the Return Authorization.

Factory Service Department
Telex Communications, Incorporated
West 1st Street
Blue Earth, MN 56013 U.S.A.

Upon completion of any repair the equipment will be returned via United Parcel Service or specified shipper collect.

End-User License Agreement for Telex® Software

IMPORTANT - Please read this document carefully before using this product.

THIS DOCUMENT STATES THE TERMS AND CONDITIONS UPON WHICH TELEX COMMUNICATIONS,
INC. (the “COMPANY”) OFFERS TO LICENSE THE INSTALLED SOFTWARE OR PROGRAM (the “SOFT­WARE”) FOR USE WITH THE PRODUCT IN WHICH IT WAS INSTALLED. YOU ARE AGREEING TO
BECOME BOUND BY THE TERMS OF THIS AGREEMENT. IF YOU DO NOT AGREE TO THE TERMS OF
THIS AGREEMENT, DO NOT USE THIS PRODUCT. PROMPTLY RETURN THE PRODUCT TO THE
PLACE WHERE YOU OBTAINED IT FOR A FULL REFUND.

The installed software as supplied by the Company is licensed, not sold, to you for use only under the terms of this
license, and the Company reserves all rights not expressly granted to you. You own the product or other media on or
in which the Software is originally or subsequently recorded or fixed, but the Company retains ownership of all
copies of the Software itself.

1. License: This license allows you to use the Software for internal purposes only on a single product in which it
was installed.

2. Restrictions: (a) You may not market, distribute or transfer copies of the Software to others or electronically
transfer or duplicate the Software. YOU MAY NOT REVERSE ENGINEER, DECOMPILE, DISASSEMBLE,
MODIFY, ADAPT, TRANSLATE, RENT, LEASE OR LOAN THE SOFTWARE OR CREATE DERIVATIVE
WORKS BASED ON THE SOFTWARE OR ANY ACCOMPANYING WRITTEN MATERIALS. (b) The Soft­ware and the accompanying written materials are copyrighted. Unauthorized copying of the Software, including
portions thereof or the written materials, is expressly forbidden. (c) You understand that the Company may update
or revise the Software and in so doing incurs no obligation to furnish such updates to you.

3. Limited Warranty: The Company does not warrant that the operation of the Software will meet your require­ments or operate free from error. The Company DISCLAIMS ALL OTHER WARRANTIES AND CONDITIONS
EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY RIGHTS.

4. Limited Liability: The liability of the Company for any claims arising out of this License based upon the Soft­ware, regardless of the form of action, shall not exceed the greater of the license fee for the Software or $50.

TABLE OF CONTENTS

Description & Specifications 1-1

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Front Panel Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Channel Selector and Operation Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Volume Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Sidetone Nulling Trimmers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Connections, Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Panel Microphone Jack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Rear Panel Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Intercom Lines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

External Program Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Speaker Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Auxiliary Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Mounting Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

MCE325 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Microphone Preamplifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Headphone Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Speaker Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Power and Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

MCS325 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Installation 2-1

Internal Programming and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Intercom Line-Channel Configurations (DS1-DS3, J6, J7, J19 & J20) . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Front Panel Setup Mode Lock-out (DS4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

ISO (DS5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Remote Talk-off (DS7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

VOX (DS8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Program Assignment – IFB Option (J4, J5, J16-J18) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Balanced/Unbalanced Dynamic Microphone Selection (J24) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Headphone Sidetone Trimmer Adjustment (R37) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Speaker Dim Adjustment (R157) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Mechanical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Electrical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

AC Power and Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Intercom Lines J8, J9, and J10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Connector Pin-outs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Four-wire Output Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Program Inputs, J14 and J15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

External Speaker, J27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Auxiliary Connector, J22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Four-Wire Channel A and B Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Key outputs – Expanded IFB Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Remote Microphone Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

ISO Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

External Headset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

External Electret Microphone. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

i

Unswitched Microphone Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

External DC Power Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Remote Speaker Mute Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Front Panel Headset Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Headset Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Headset Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Operation 3-1

General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

Momentary/Latching Button action . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

Channel Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

Panel Mic/Headset Mic Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2

Microphone On/Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2

Speaker On/Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2

Volume Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Front Panel Sidetone Nulling Trimmer Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2

Sending and Receiving Call Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Using the Talk-Off Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Front Panel Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3

Activating Setup Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3

Menu Selection/Ending Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3

Submenus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Channel ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4

Four-channel Listen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Mono . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4

Call Disable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4

Button Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4

Latch Disable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4

Instant Mic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5

Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Maintenance 4-1

Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

Factory Support Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

Corrective Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

Front Panel Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Test and Adjustment Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2

Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2

Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2

Power Supply Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Initial Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3

Keying Output Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3

USMB (Un-Switched Microphone Balanced) Frequency Response and Level Check . . . . . . . . . . . . . . . . . .4-4

Frequency Response and Level Check, Mic to Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4

Four-Channel, Two-Wire Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Two-Channel, Four-Wire Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5

Sidetone Null Test and Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5

True Sidetone Adjust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Level and Frequency Response Check, Intercom Channel to Headphone . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Level and Frequency Response Check, Intercom Channel to Speaker. . . . . . . . . . . . . . . . . . . . . . . . . .4-7

Level and Frequency Response, Program to Headphones and Speaker . . . . . . . . . . . . . . . . . . . . . . . . .4-7

Program A to Left Headphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7

Program B to Right Headphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8

Program to Speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8

IFB Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8

IFB B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

ii

IFB A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

Level and Frequency Response Check, Four-Wire Input to Headphone . . . . . . . . . . . . . . . . . . . . . . . . 4-9

Four-Wire A Input to Left Headphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

Four-Wire B input to Right Headphone. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

Panel Mic to Channel Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

Carbon Mic to Channel Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

VOX Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

Mic Kill Receive Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

Mic Kill Transmit Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

Call Transmit Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

Call Receive Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

ISO Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

Remote Mic Switch Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

Program Lockout Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

Noise Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

Parts Lists 5-1

Packaging Assembly (9000-6464-00) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Final Assembly, MCE325 (9010-6464-00) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Front Panel Assembly (9020-6261-00) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Back Panel Assembly (9020-6262-00) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Heatsink Assembly (9020-6324-00) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Main PC Board Assembly (9030-6245-01) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

PC Board Assembly, Front Panel (9030-6246-00) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13

Diagrams 6-1

iii

iv

Description

General

The MCE325 is a four-channel, programmable intercom station. It may be used as a headset
station or, with the addition of the MCS325 Modular Speaker, as a speaker station. It may be
mounted in a console or equipment rack via optional mounting kits.

C

HAPTER

1

D

ESCRIPTION

& S

S ECTION

PECIFICATIONS

The MCE325 can be used with either two-wire or four-wire intercom lines, or a combination of
both. In this manual and in the labeling on the MCE325, references to channels 1, 2, 3, and 4
indicate two-wire lines; references to four-wire A and four-wire B indicate four-wire lines.

The MCE325 can be interfaced to a variety of external devices including external program
sources, two-way radios, paging systems, and satellite circuits. Some typical applications are
shown in Figure 1.2 through Figure 1.10.

Features

Features of the MCE325 include:

• Call Signaling: Call signaling is accomplished using an inaudible (20 kHz) signal to activate a
call indicator LED.

• Remote “talk-off”: Active, unattended remote station microphones may be deactivated by
momentarily injecting an inaudible (24 kHz) signal into the corresponding intercom line. The
MCE325 can send and receive “talk-off” signals.

• VOX circuit: The MCE325 may be programmed for voice activation of the microphone.

• Simple IFB: Program audio assigned to a channel is interrupted during talk.

• External device keying: External devices, such as two-way radios, speaker mute relays, or
paging systems may be activated through key outputs at the auxiliary connector on the rear
panel. The key outputs may also be used to expand the simple IFB function, allowing any one
of a number of MCE325 stations to interrupt the program source and talk on the line.

• Microphone limiter: The microphone preamplifier circuit contains a limiter, which helps to
equalize voice levels.

• Fully programmable: Retains programming even when power is shut off.

1-1

NOTE

Front Panel Features

Channel Selector and Operation Buttons

These buttons have two modes of operation: standard operating mode and program, or setup,
mode. The printing on the face of each button indicates its function in standard operating mode;
printing under each button indicates its setup mode function. (See Section 3 for operation and
programming instructions.) An LED located above each button provides status information.

The MCE325 is factory pre-programmed for two-channel operation, with each channel having
one talk and one listen button. However, the MCE325 may also be programmed so that each
channel selector button controls both talk and listen for a single channel, permitting operation of
up to four intercom channels. Additionally, users may wish to customize the identification of
channels. With this in mind, a button kit has been supplied with the MCE325 to allow you to
customize the button labeling to suit your particular application. Figure 1.11 shows the available
button caps as well as some typical button configurations.

The standard buttons are opaque. As a result, the front panel LED’s may not be visible when
viewing the MCE325 from a low angle (such as when it is mounted high in an equipment rack).
As a remedy for this problem, clear buttons are available that allow the LED light to pass through.
(Order RTS™ part no. 9000-2698-800)

Volume Controls

CH1 (VOL 1): This control adjusts the volume of channels 1 and/or 3 to the left headphone when
stereo headphones are used. It adjusts the mono mix level of these channels when monaural
headphones or an external speaker is used.

CH2 (VOL 2): This control adjusts the volume of channels 2 and/or 4 to the right headphone
when stereo headphones are used. It adjusts the mono mix level of these channels when monaural
headphones or an external speaker is used.

PGM VOL: This control adjusts the mono mix of program A and program B (input at the rear
panel and assigned via internal programming) to the headphones and external speaker.

Sidetone Nulling Trimmers

These trimmers are adjusted to prevent acoustic feedback when using a panel microphone along
with an external speaker.

Connections, Inputs and Outputs

Front Panel

DYNamic MIC HEADSET: This connector accepts a stereo-earphone, dynamic-microphone
headset (with or without a mic on/off switch).

CARBon MIC HEADSET: This connector accepts a standard 3-conductor, ¼-inch phone plug.
The necessary phantom power is provided to power a carbon microphone or its electronic
equivalent.

Panel Microphone Jack

The MCE325 may be optionally fitted with a gooseneck panel microphone by removing the
blanking plug located in the upper-right corner of the front panel. The panel microphone jack
accepts specially made gooseneck microphones (MCP-90 series), which are available from RTS.

1-2 MCE325 User Instructions

Figure 1.1

MCE325 front and rear panel features.

Rear Panel Features

Intercom Lines

Connectors J8 and J9 are parallel-wired for loop-through connection to additional stations. These
connectors are used either for two-wire channels 1 and 2 input/output, or four-wire channel A
output. (The four-wire channel A input is connected at the auxiliary connector.)

Connector J10 is used for two-wire channel 3 and 4 input/output, or four-wire channel B output,
but no loop-through connector is provided for these channels. (The four-wire channel B input is
connected at the auxiliary connector.)

The MCE325 presents a bridging impedance of 10,000 ohms to the intercom line, and is designed
for use with intercom lines having a 200-ohm line terminating impedance. A 200 ohm termination
plug is supplied (connected to J10) to prevent channels three and four from oscillating when the
MCE325 is in two-channel mode.

External Program Input

Two ¼-inch phone jacks are provided for external program input. The station accepts line-level,
balanced input. The two program inputs are mixed internally, and may be assigned (through
internal programming) to right headphone, left headphone, external speaker, or any combination
of these. In addition, program A may be assigned (through internal programming) to two-wire
channel 3 or four-wire channel A; program B may be assigned to two-wire channel 4, but cannot

1-3

be assigned to a four-wire channel. The program assigned to channels is interrupted during talk
output.

Speaker Output

A ¼-inch phone jack is provided for connection of an external speaker (8-ohms minimum
impedance). The speaker output is compatible with the MCS325 speaker.

Auxiliary Connector

Standard Options on the 25-pin, female, D-Sub connector are:

1 Unswitched microphone output

2 ISO connection to a VCP6A/VCP12A/VCP12B

3 Microphone on/off switch

4 Remote headset

5 Remote panel microphone

6 Separate inputs for +10 to +15 volts DC, and +17 to +24 volts DC

7 Common/ground circuit

8 Four-wire channel A and B inputs

9 Remote speaker mute

10Key outputs

Programming

Three methods of programming are used:

1 Front panel programming via the channel selector and operation buttons.

2 Internal programming via circuit board DIP switches.

3 Internal programming via circuit board jumpers.

The most commonly programmed options are assigned to the front panel for convenience.
Detailed information on internal programming is provided in Section 2, Installation. Detailed
information on front panel programming is provided in Section 3, Operation.

Power

The MCE325 is designed for local powering, and is supplied ready for use with either 115 or 230
VAC (but not both). The unit may also be powered from an external DC source connected at the
Auxiliary (J22) connector on the rear panel. For information on changing the AC supply voltage
configuration, or using DC power, see Section 2.

Mounting Configuration

Mounting configurations are illustrated in Figure 2.3 and include rack mount speaker station,
console mount headset station, rack mount headset station, desk top headset station, and portable
speaker station. Some mounting configurations may require a remotely located microphone or
headset. These may be connected to the Auxiliary connector (J22) on the back of the unit.

1-4 MCE325 User Instructions

MCE325 Specifications

General

Bridging Impedance (to line) 10,000 ohms typical

Noise Contribution to 200-ohm Line -90 dBu

Call Signal Frequency 20 kHz, crystal controlled

Talk-off Frequency 24 kHz, crystal controlled

Microphone Preamplifier

Maximum Voltage Gain 54 dB

Frequency Response 100 Hz to 8,000 Hz, ±3 dB

Input Impedance 1,000 ohms

Limiter Range 30 dB

Headphone Amplifier

Maximum Voltage Gain 30 dB

Frequency Response 100 Hz to 8,000 Hz, ±3 dB

Headphone Impedance 50 to 600 ohms

Output Power 150 mW into 50 ohms

Output Voltage Level 8 Vp-p

Speaker Amplifier

Maximum Voltage Gain 30 dB

Frequency Response 100 Hz to 8,000 Hz, ±3 dB

Speaker Impedance 8 to 16 ohms

Output Power per Amplifier 5W into 8 ohms

Output Voltage Level 16 Vp-p

Power and Mechanical

Power Requirements 115 to 230 VAC, 20 VA max,

12 to 25 VDC, 100 to 125 mA quiescent, 900 mA max

Dimensions 1.72” H x 8.2” W x 8” D (44 mm x 208 mm x 203 mm)

Weight 4.25 lbs (1.93kg)

Material/Finish Thermo-plastic front panel, aluminum case, light gray
finish

1-5

Connectors

Intercom Line Connector XLR type, 3-pin (male-female loop through on two-wire

Dynamic Mic XLR type, 6-pin female

Carbon Mic ¼-inch phone jack, 3-circuit

Auxiliary Connector 25-pin, female, D-Sub

Program Inputs ¼-inch phone jack, 3-circuit

Speaker Output ¼-inch phone jack, 3-circuit

Panel Mic ¼-inch phone jack, metal busing, 3-circuit

MCS325 Specifications

The MCS325 is designed for use with MCE325, but may also be used as a general-purpose
monitor for program material.

Impedance 8 ohms (DCR5.5 to 7 ohms)

Power Rating 5W RMS continuous

Sensitivity 90 dB ±2 dB/2.83 volts/one meter on axis averaged over

channel 1 and 2, or four-wire channel A; Female only on
two-wire channel 3 and 4, or four-wire channel B

one octave bands centered at 250 Hz, 500 Hz, 1 kHz,
2 kHz, 4 kHz, and 8 kHz when enclosed in a sealed box
of 1.3 liters volume.

Frequency Response 200 Hz to 10 kHz ±4 dB on 1/10 octave measurement in

1.3 liter sealed box.

Free Air Resonance 200 Hz to 250 Hz

Distortion Less than 10% @ 5W at resonance.

Stray Magnetic Field Less than 1 gauss at 1 cm from chassis.

Mechanical Noise Unit to be free of buzzes and rattles at 5 W sine wave

input from 100 Hz to 10 kHz.

Figure 1.2

Standard two-channel, two-wire configuration.

1-6 MCE325 User Instructions

Figure 1.3

Standard four-channel, two-wire configuration.

Figure 1.4

Figure 1.5

A four-channel, two-wire configuration with two channels used for IFB’s.

Configuration for one or two two-wire channels and one four-wire channel.

1-7

Figure 1.6

Standard two-channel, four wire configuration.

Figure 1.7

Multiple interconnected stations in four-channel, two-wire configuration with two channels
used for IFB’s.

1-8 MCE325 User Instructions

Figure 1.8

Multiple interconnected stations using one four-wire intercom channel and two two-wire
channels for IFB’s.

Figure 1.9

A four-channel, two-wire configuration with two channels used for IFB’s (shown with TELCO
interface).

1-9

Figure 1.10

Configuration for an ENG truck using one four-wire intercom channel and two two-wire
IFB’s.

1-10 MCE325 User Instructions

Figure 1.11

MCE325 button configurations.

1-11

1-12 MCE325 User Instructions

Internal Programming and Adjustments

WARNING

Hazardous voltages exist inside this equipment. Disconnect the AC line cord before
opening the equipment or attempting any internal programming or adjusting.

General

S ECTION

C

HAPTER

2

I

NSTALLATION

Prior to installing the MCE325, it may be necessary to change some of the internal programming
to suit your particular application. Table 2.1 and Table 2.2 list the functions for the DIP switches
and jumpers which are used for internal programming. Also shown are the default settings that
were pre-programmed at the factory.

If your application requires settings that are different from the defaults, you will have to remove
the top cover of the unit (see Figure 2.1) and make the required changes. If you do change the
internal programming, it may be useful to note the changes for future reference.

The locations of the DIP switches and jumpers are illustrated in Figure 2.2. DIP switch
programming is accomplished by setting switches to the “off” or “on” positions. Jumper
programming is accomplished using shorting jumpers. By inserting the jumpers to short the
appropriate pins, a function is either assigned or not assigned. Pin 1 of each jumper is indicated by
a square symbol in Figure 2.2 for reference when making changes. Also shown in Figure 2.2 are
trimmers for adjusting the sidetone and speaker dimming levels. Usage of the DIP switches,
jumpers, and level trimmers is described in the following paragraphs.

2-1

Figure 2.1

Top cover removal.

NOTE

Intercom Line-Channel Configurations (DS1-DS3, J6, J7, J19 & J20)

The four channels of the MCE325 may be assigned to intercom lines in a variety of ways.
Channel assignment is determined by the settings of DIP switches DS1 through DS3 and jumpers
J6, J7, J19, and J20. There are six possible intercom line configurations. These are listed in Table

2.3 together with the proper DIP switch and jumper settings for each.

Table 2.1

Switch Number Switch Function Default Setting

DS1 four-wire CH A output not installed (off), four-wire CH A output installed

DS2 four-wire CH B output not installed (off), four-wire CH B output installed

DS3 two-channel mode (off)*, four-channel mode (on) Off

DS4 Front panel setup lock-out disabled (off), Front panel setup lock-out

DS5 Listen and talk muted during ISO (off), Talk only muted during ISO (on) Off

DS6 Not used Off

DS7 Talk-off transmit disabled (off), Talk-off transmit enabled (on) On

DS8 VOX disabled (off), VOX enabled (on) Off

The terms “two-channel mode” and “four-channel mode” apply only to two-wire lines. In two­channel mode, each two-wire line uses two channel selector buttons: one for talk and one for
listen. In four-channel mode, each two-wire line uses one channel selector button for both talk and
listen.

DIP switch functions and default settings.

Off

(on)

Off

(on)

Off

enabled (on)

The two-channel mode should be selected under only two circumstances:

1 When only one or two two-wire lines are connected to channels one and two only.

2-2 CSI-200 User Instructions

2 When a two-wire line is connected to channel one and a four-wire line is connected to channel

B.

For all other intercom line configurations that use two-wire lines, DS3 must be set to the “on”
position for four-channel operation.

Table 2.2

Jumper Number Jumper Function Default Setting

J4 Assigns PROGRAM A input to two-wire CH 3 or four-wire CH B.

J5 Assigns PROGRAM B input to two-wire CH 4.

J6 Selects two-wire CH1 and CH 2, or four-wire CH A output. (See J19

J7 Selects two-wire CH 3 and CH 4, or four-wire CH B output. (See J20

J16 Assigns mono mix of the PROGRAM A and B inputs to the left

J17 Assigns mono mix of the PROGRAM A and B inputs to the right

J18 Assigns mono mix of the PROGRAM A and B inputs to the speaker.

J19 Selects four-wire CH A input. Off (not used): pins 2 & 3 shorted.*

J20 Selects four-wire CH B input. Off (not used): pins 2 & 3 shorted.*

J24 Selects unbalanced or balanced dynamic mic input.

Jumper functions and default settings.

Not assigned
Not assigned: pins 2 & 3 shorted.
Assigned: pins 1 & 2 shorted (IFB to CH 3).

Not assigned
Not assigned: pins 2 & 3 shorted.
Assigned: pins 1 & 2 shorted (IFB to CH 4).

Two-wire operation
for CH A input.)
CH1 and CH 2 selected: pins 2 & 3 shorted.
Four-wire CH A output selected: pins 1 & 2 shorted.

Two-wire operation
for Ch B input.)
CH 3 and CH 4 selected: pins 2 & 3 shorted.
Four-wire CH B output selected: pins 1 & 2 shorted.

Assigned
headphone.
Not assigned: pins 2 & 3 shorted.
Assigned: pins 1 & 2 shorted.

Assigned
headphone.
Not assigned: pins 2 & 3 shorted.
Assigned: pins 1 & 2 shorted.

Assigned
Not assigned: pins 2 & 3 shorted.
Assigned: pins 1 & 2 shorted.

Off
On when LISTEN 1 button is on: pins 1 & 2 shorted.
Always on: pins 3 & 4 shorted.

Off
On when LISTEN 2 button is on: pins 1 & 2 shorted.
Always on: pins 3 & 4 shorted.

Unbalanced mic input
Unbalanced: pins 2 & 3 shorted.
Balanced: pins 1 & 2 shorted.

NOTE

*J19 and J20 jumpers should be in “off” positions when two-wire lines are used.

2-3

Figure 2.2

Internal DIP switches, jumpers and level trimmers.

2-4 CSI-200 User Instructions

Table 2.3

DIP SWITCHES JUMPERS

DS1 DS2 DS3 J6 J7 J19 J20

Configuration 1: Two 2-wire lines (CH 1& CH 2). (Default configuration.)

Off Off Off Pins 2 & 3 shorted Pins 2 & 3 shorted Pins 2 & 3 shorted Pins 2 & 3 shorted

Configuration 2: Three or four 2-wire lines (CH 1, CH 2, CH 3, CH 4).

Off Off On Pins 2 & 3 shorted Pins 2 & 3 shorted Pins 2 & 3 shorted Pins 2 & 3 shorted

Configuration 3: One 2-wire line (CH 1); One 4-wire line (CH B).

Off On Off Pins 2 & 3 shorted Pins 1 & 2 shorted Pins 2 & 3 shorted Pins 1 & 2 shorted

Configuration 4: Two 2-wire lines (CH1 & CH2); One 4-wire line (CH B).

Off On On Pins 2 & 3 shorted Pins 1 & 2 shorted Pins 2 & 3 shorted Pins 1 & 2 shorted

Configuration 5: Two 2-wire lines (CH 3 & CH4); One 4-wire line (CH A).

On Off On Pins 1 & 2 shorted Pins 2 & 3 shorted Pins 1 & 2 shorted Pins 2 & 3 shorted

Configuration 6: Two 4-wire lines (CH A & CH B).

On On On Pins 1 & 2 shorted Pins 1 & 2 shorted Pins 1 & 2 shorted Pins 1 & 2 shorted

Internal programming for the various intercom line configurations.

NOTE

See Table 3.1for a summary of how the channel selector buttons work for the various
configurations. The MCE325 is typically supplied with a termination plug inserted into J10. This
plug terminates CH 3 and CH 4 with 200 ohms to prevent oscillation when these channels are not
used. When the channels are used, this termination plug should be removed.

Front Panel Setup Mode Lock-out (DS4)

DIP switch DS4 may be set to lock out the front panel programming and prevent changes. Front
panel programming is described in Section 3, Operation.

ISO (DS5)

The MCE325 may be used with an RTS Model VCP6A, VCP12A, or VCP12B Control Station to
permit private conversation between the MCE325 operator and a camera operator. When ISO
mode is engaged, either talk, or talk and listen (depending on the setting of DS5) for all other
channels connected to the MCE325 will be muted, and a private line will be established between
the MCE325 operator and the camera operator. See “ISO Connection” for wiring information.

Remote Talk-off (DS7)

The MCE325 is capable of generating and transmitting an inaudible, 24 kHz signal on an
intercom channel. This signal is used to turn off the microphones on any remote stations on the
channel (stations with remote talk-off feature only). This feature is useful when an unattended
user station with an activated microphone is introducing unnecessary noise into a line. DIP switch
DS7 enables/disables this feature. When remote talk off is enabled, the talk-off signal is activated
using the CALL button on the front panel. (for Operation see “Using the Talk-Off Feature”.)

VOX (DS8)

DIP switch DS8 turns the voice activated microphone circuit on or off. Voice activation can be
used with the panel microphone, a headset, or a remote microphone connected at the rear panel.
(There is no adjustment for VOX sensitivity.)

2-5

Program Assignment – IFB Option (J4, J5, J16-J18)

Jumper J4 assigns PROGRAM A to two-wire CH 3 or four-wire CH B with interrupt during talk
(IFB A). Jumper J5 assigns PROGRAM B to CH 4 with interrupt during talk (IFB B).
(PROGRAM B is not used in four-wire mode.)

Jumpers J16, J17, and J18 assign the mono mix of both program inputs to the left headphone,
right headphone, and speaker respectively. Program volume to the headphones and speaker is
controlled by the PGM VOL control on the front panel.

See Table 2.2 for Jumper settings. See Figure 2.2 for locations of jumpers.

Balanced/Unbalanced Dynamic Microphone Selection (J24)

The MCE 325 may be used with headsets having either a balanced or unbalanced dynamic
microphone. The MCE325 is pre-programmed for use with an unbalanced microphone by
shorting J24 pins 2 and 3. For balanced microphones, remove the shorting jumper and reinstall it
to short pins 1 and 2.

Headphone Sidetone Trimmer Adjustment (R37)

The headphone sidetone trimmer (R37) adjusts the loudness of your own voice heard in your
headset when the microphone is on and the speaker is off. (It does not affect the actual level heard
on the intercom lines.) This trimmer is preset so that your voice level in the headphones will be
approximately ¾ of the intercom line level. To prevent feedback, this signal is automatically
turned off when the external speaker is turned on with the SPKR ON switch.

Speaker Dim Adjustment (R157)

When an external speaker is used, switching the microphone on will cause the speaker level to
attenuate. The level of attenuation may be adjusted with the speaker dim trimmer (R157). The
minimum attenuation of 6 dB is preset at the factory (R157 fully clockwise). The range of
adjustment is –6 dB to –40 dB.

Mechanical Installation

Dimensional requirements for the various mounting configurations are illustrated in Section 6.
Also allow an additional 4.0 inches (102 mm) of rear panel clearance for connectors.

If the headset connector is remotely located (See “External Headset”), allow space between the
cable and interfering sources such as TV monitors, power supplies and equipment with internal
power supplies. The MCE325 has no special ventilation space requirements.

Assembly of optional mounting components is shown in Figure 2.3.

2-6 CSI-200 User Instructions

Figure 2.3

Mounting configurations.

2-7

Electrical Installation

AC Power and Fuse

The Model MCE325 is pre-wired for either 115 or 230 VAC operation, and the appropriate fuse is
already installed. The MCE325 uses a 0.5A Slo-Blo fuse for 115 volt operation, or a 0.25A Slo­Blo fuse for 230 volt operation. (A fused external DC source may be used instead of AC power if
desired. (See “External DC Power Source”.)

Intercom Lines J8, J9, and J10

General

Intercom line connectors J8 and J9 are parallel-wired for loop-through connection to other
intercom stations. These connectors are used for connection of two-wire lines to channels one and
two (full-duplex operation), or for connection of four-wire channel A output (channel A input is
connected at the auxiliary connector).

Intercom line connector J10 is used for connection of two-wire lines to channels three and four
(full-duplex operation), or for connection of four-wire channel B output (channel B input is
connected at the auxiliary connector).

Connector Pin-outs

Table 2.4

PIN # FUNCTION

1 Common (low side of line)

2 Two-wire CH 1 or four-wire CH A high output

3 Two-wire CH 2 or four-wire CH A low output

Table 2.5

PIN # FUNCTION

1 Common (low side of line)

2 Two-wire CH 3 or four-wire CH B high output

3 Two-wire CH 4 or four-wire CH B low output

Connectors J8 and J9.

Connection J10

Four-wire Output Termination

Figure 2.4

4-wire output terminations.

When four-wire outputs are used, termination resistors must be installed for proper operation. The
output amplifiers are current sources, and the output level is determined by the terminating

2-8 CSI-200 User Instructions

resistor values. These resistors would normally be installed in the cable connector, but may be
placed at any point in the signal path. Recommended values are shown in X.

Program Inputs, J14 and J15

The PROGRAM A and B inputs accept line-level (0 dBu nominal), balanced audio. The program
inputs are connected using ¼-inch stereo phone plugs.

Figure 2.5

SECTION FUNCTION

Tip Program high

Ring Program low

Sleeve Common

Connectors J14 and J15.

The MCE325 must be internally programmed to assign the program inputs to the intercom lines,
headphones, or speaker output (see “Program Assignment”). Program volume to the headphones
and speaker is controlled by the PGM VOL control on the front panel.

External Speaker, J27

The SPEAKER OUTPUT jack provides a bridging-type output for an external speaker (8 ohms
minimum). The external speaker is connected using a ¼-inch phone plug.

Figure 2.6

Connector J27.

CAUTION

SECTION FUNCTION

Tip Speaker plus

Ring Speaker minus

Sleeve No connection

The MCE325 provides a bridging-type speaker output. DO NOT LET EITHER SPEAKER
LEAD CONTACT GROUND.

The external speaker is turned on and off by the front panel SPKR ON switch.

Auxiliary Connector, J22

Four-Wire Channel A and B Input

The four-wire channel A and channel B inputs are connected at the auxiliary connector as
follows:

Table 2.6

PIN # FUNCTION

8 Four-wire channel A high

21 Four-wire channel A low

9 Four-wire channel B high

22 Four-wire channel B low

Auxiliary connector, J22.

The four-wire inputs must be assigned, using internal programming jumpers J19 and J20, before
they can be used (as previously described in “Intercom Line-Channel Configurations (DS1-DS3,
J6, J7, J19 & J20).”

2-9

Key outputs – Expanded IFB Option

Four logic-type outputs are available at pins 6, 7, 19, and 20 of the auxiliary connector:

Table 2.7

PIN # FUNCTION

6 CH 1 or four wire CH A key output

7 CH 3 or four-wire CH B key output

19 CH 2 key output

20 CH 4 key output

Auxiliary connector, J22.

There are internal pull-up resistors on the CH 3 and CH 4 key outputs. Pressing the CH 3 or CH 4
talk button will result in a logic high to low transition at the corresponding key output. (Logic
high is approximately 13 VDC; Logic low is less than 2 VDC.) There are no internal pull-up
resistors on the CH 1 and CH 2 key outputs. These outputs will “float” until externally loaded.

The channel three and four key outputs may also be used to expand the IFB function, allowing
any one of several MCE325 User Stations to interrupt a single-point program source and talk on
the interrupted channel. For example, if one MCE325 is operating with PROGRAM A assigned to
channel three, the channel three key output of a second MCE325 User Station (with no program
connected) can be directly connected to the channel three key output of the first MCE325;
activating channel three for talk from either station will now interrupt the program source and
permit that station to talk on channel three.

Remote Microphone Switch

A remote microphone switch may be connected at the auxiliary connector. Connect mic switch
high to pin 25; connect mic switch low to pin 10 or 11. When the switch is closed, the microphone
will turn on, and the front panel MIC ON LED will illuminate. When the remote switch is off, the
microphone may be turned on from the front panel. When the remote switch is on however, the
microphone cannot be turned off from the front panel.

ISO Connection

To connect an RTS Model VCP6A, VCP12A, or VCP12B ISO Control Panel to the MCE325,
connect the unswitched microphone output of the MCE325 (pins 1 and 14 of the auxiliary
connector) to the four-wire input of the VCP Control Panel; connect the four-wire output of the
VCP Control Panel to either a four-wire input or a program input of the MCE325; connect the
logic contact output of the VCP Control Station to the ISO input of the MCE325 (pin 12 of the
auxiliary connector); connect VCP common to pin 11 of the auxiliary connector.

External Headset

An external headset may be connected to the auxiliary connector. (See “Headset Requirements”.)
Connect headphone left to pin 5, headphone right to pin 18, and headphone common to pin 17.
Connect microphone high to pin 4; connect microphone low to pin 16. The external headset
connections are wired in parallel with the front panel dynamic headset connector; therefore, use
only one at a time.

In the headset connecting cable, prevent coupling between the microphone and headphone leads
by using a shielded twisted pair for the microphone, and a separate shielded twisted pair for the
headphones. Do not allow headphone common to contact microphone low. Tie the headphone
shield to headphone common. The headset cable can be made longer when the microphone and
headphone pairs are physically separated. The wider the separation, the longer the allowable cable
length. Estimated maximum usable headphone cable lengths are as follows:

Single cable, two shielded twisted pairs: 10 feet (3.05 m). Dual-ribbed cable, two shielded twisted
pairs: 30 feet (9.14 m).

2-10 CSI-200 User Instructions

Separate shielded twisted pair cables: 50 feet (15.24 m). Balanced microphone input: up to 100
feet (30.48 m).

External Electret Microphone

An external electret microphone may be connected at the auxiliary connector and used in place of
a front-panel gooseneck microphone. Connect microphone high/bias to pin 15 and connect
microphone low to pin 2. When using an external microphone, do not connect a front-panel
gooseneck microphone.

Unswitched Microphone Output

The microphone audio is provided as an unswitched, balanced output at the auxiliary connector.
The in-phase signal is available at pin 1; the inverted-phase is available at pin 14.

External DC Power Source

The MCE325 may be powered from an external DC power supply in the 10 to 25 volt range (500
mA minimum).

If the external supply is in the 10 to 15 volt range, connect the positive lead to pin 13 of the
auxiliary connector and connect the minus lead to pin 10 or 11. A 0.5 Amp slo-blo fuse should be
connected in-line for 17 to 24 volt operation.

Remote Speaker Mute Control

When the MCE325 is used with an external speaker, the speaker may be muted from a remote
location. Applying a logic low signal to pin 25 of the auxiliary connector will cause muting.
Connect circuit common to pin 11.

Front Panel Headset Connections

Headset Requirements

Use headphones with an impedance of 25 ohms or greater. Low impedance 8 ohm headphones are
not recommended. Headphones with good acoustic isolation (20 to 40 dB) improve
communication in high ambient noise environments, and allow the user to use the headphones at a
less tiring, lower volume.

Headset Connections

Dynamic-microphone headset connector: XLR-6 type receptacle.

Table 2.8

PIN # FUNCTION

1 Balanced mic low/unbalanced mic common

2 Balanced/unbalanced mic high

3 Headphone/mic switch common

4 Headphone left

5 Headphone right

6 Mic Switch high

Dynamic-microphone headset connector.

2-11

Carbon-microphone headset connector: ¼-inch, tip-ring-sleeve phone jack.

Table 2.9

SECTION FUNCTION

Tip Carbon microphone

Ring Headphone

Sleeve Common/ground

Carbon-microphone headset connector.

2-12 CSI-200 User Instructions

General

S ECTION

C

HAPTER

3

O

PERATION

The front panel buttons have different functions when the MCE325 is switched from operating
mode to setup mode. Legends on the buttons indicate their operating mode functions; legends
under the buttons indicate their setup mode functions. All of the front panel buttons were pre­programmed for a certain type of operation. This is the default configuration. Operation for the
default configuration is described first, and is then followed by front panel programming
instructions to alter the operation.

Operating Instructions

Momentary/Latching Button action

The channel selector buttons and the MIC ON button feature a special momentary/latching dual­action: if a button is pressed and released quickly it will “latch” (turning “on” if off or turning
“off” if on); if the button is pressed and held slightly longer, the action will be momentary and the
button will turn off when released. All other buttons are latching-only (press to activate, press to
release).

NOTE

The latching action can be disabled through the front panel programming.

LED Indicators

LED indicators are provided for each button to indicate current status. The LED can provide up to
four indications: continuously off, continuously on, short blink (50% on, 50% off) and long blink
(90% on, 10% off).

Channel Selection

Table 3.1 summarizes the operation of the channel selector buttons for the various intercom line
configurations. Basically, four-wire intercom lines always use one TALK and one LISTEN
button for intercom communication, as do two-wire lines when the station has been programmed
for two-channel operation.

When the station is operated in four-channel mode, however, each two-wire intercom line uses
only one channel selector button to control both talk and listen, and the MCE325 is pre­programmed so that a channel is activated for both talk and listen when the button is pressed. The

3-1

NOTE

NOTE

button action can be changed, via the front panel programming, so that the button controls talk
only, with listen either always on or always off.

Panel Mic/Headset Mic Selection

The PANEL MIC button selects either panel microphone (LED on) or headset microphone (LED
off).

Microphone On/Off

The MIC ON button turns the microphone on (LED on) or off (LED off).

The MCE325 can be programmed, via the front panel, so that the microphone will automatically
turn on whenever a channel is activated for talk. The MCE325 may also be internally
programmed for voice-activated microphone (VOX) as previously described in Section 2.

Speaker On/Off

The SPKR ON button turns the external speaker on (LED on) or off (LED off).

Volume Adjustment

Table 3.1 summarizes the operation of the volume controls for the various intercom line
configurations. The MCE325 is pre-programmed for stereo operation; CH 1 (VOL 1) adjusts the
level to the left headphone and CH 2 (VOL 2) adjusts the level to the right.

The MCE325 can be programmed, via the front panel, for monaural operation if desired.

NOTE

The PGM VOL control adjusts the monaural mix of both program inputs to both headphones and
to the external speaker. It does not affect the program volume on the intercom lines.

Front Panel Sidetone Nulling Trimmer Adjustment

When the MCE325 is used with two-wire lines, the station operator’s voice signal is not only
transmitted onto the intercom lines, but also echoed back into the MCE325 receive circuits. This
can result in acoustic feedback when the MCE325 is used with an external speaker. The sidetone
nulling trimmers are used to null, or subtract, the station operator’s voice signal from the rest of
the received signal to prevent this feedback. (NOTE: This is not necessary in four-wire systems
since transmit and receive use separate circuits.) A trimmer is provided for each of the four
channels. The trimmers are factory-preset for maximum nulling of the microphone signal when
an ideal 200-ohm resistance terminates each intercom channel; however, the trimmers may
require slight readjustment after the MCE325 has been installed to compensate for variations
from the ideal.

To adjust the sidetone nulling trimmers:

1 Turn the speaker switch on (even if an external speaker is not connected). This will turn off the

internal, true sidetone trimmer (see note below).

2 Turn on the microphone.

3 Activate one talk button at a time, and speak into the microphone. Slowly increase the volume,

and note the level of your voice in the headphones or speaker. Adjust the corresponding
sidetone nulling trimmer to minimize your voice signal. Repeat for each channel being used,
making sure that only one channel is activated at a time.

There is also an internal, true sidetone trimmer, which allows the station operator to hear his or
her voice when using headphones. This sidetone signal is turned off when the speaker switch is

3-2 CSI-200 User Instructions

turned on to prevent feedback. See “Headphone Sidetone Trimmer Adjustment (R37)” for further
details.

Sending and Receiving Call Signals

To call a channel:

1 Press the CALL button; the CALL LED’s will flash to indicate “call signal ready”.

2 Press and hold the talk button for the channel to be called; the call signal will be transmitted as

long as the talk button is held.

3 When a response is received, release the talk button to turn off the call signal.

Receiving a call:

When there is an incoming call, the indicator LED above the appropriate channel selector button
will flash.

Using the Talk-Off Feature

The talk-off feature deactivates the mic switches of all remote user stations on a selected channel.
To use talk-off:

1 Press and release the CALL button three times in rapid succession; the CALL LED’s will turn

on to indicate “talk-off signal ready”.

2 Momentarily press the talk button for the channel to be deactivated. This will cause the talk-off

signal to be transmitted.

3 Release the talk button to end the talk-off signal transmission.

Front Panel Programming

Activating Setup Mode

Press and hold the CALL button for 5 seconds: the TALK 1, LISTEN 1, TALK 2, LISTEN 2,
PANEL MIC, SPKR ON, and MIC ON LED’s will begin to flash. This is the main menu.

Menu Selection/Ending Setup

The submenu names are listed under the switches. Press the desired switch to access the submenu
for that switch. Press the CALL button from a submenu to return to the main menu; press the
CALL button again to exit from the main menu to the operating mode.

NOTE

If no submenu is selected from the main menu within 12 seconds after program mode activation,
the programming mode will time out, and the MCE325 will return to normal operation. If a
submenu is selected, however, the unit will remain in programming mode until intentionally
exited.

Submenus

The following paragraphs describe each of the submenus. The default, or factory pre-programmed
setting, is also indicated for each submenu.

3-3

Channel ID

The MCE325 can be programmed so that when someone is talking on an intercom channel, the
corresponding listen button LED will flicker as they talk to provide a visual indication of which
channel is talking. With the Channel ID submenu selected, press each TALK button to select or
deselect Channel ID. The button’s LED will indicate the Selected mode as follows:

Short LED blink: Channel ID disabled. (default).

Long LED blink: Channel ID enabled.

Four-channel Listen

When the MCE325 is operating in four-channel mode, each channel selector button may be
individually programmed for one of three types of operation. With the Four-channel Listen
submenu activated, press each channel selector button one or more times to select the desired type
of operation as follows:

Short LED blink (90% on, 10% off): Button must be pressed to talk or listen (default).

Long LED blink (50% on, 50 % off): Listen will always be on; button must be pressed to talk.

LED off: listen will always be off; button must be pressed to talk.

Mono

The headphone output may be configured for either monaural or stereo operation. With the Mono
submenu selected, press the Mono button one or more times to select the type of headphone
output as follows:

Long LED blink: (50% on, 50 % off): Stereo (default).

Short LED blink: (90% on, 10 % off): Monaural.

Call Disable

Call disable prohibits incoming or outgoing call indication and signaling on selected channels.
With the Call Disable submenu selected, press each talk button to select the desired operation as
follows:

Short LED blink (90% on, 10 % off): Call function enabled (default).

Long LED blink (50% on, 50% off): Call function disabled.

Button Lock

Button lock permits all buttons (except CALL) to be individually programmed for one of three
types of operation. With the Button Lock submenu selected, press each button one or more times
to select the desired type of operation as follows:

Short LED blink (90% on, 10% off): No button lock (default).

Long LED blink (50% on, 50% off): Button locked in the “on” position.

LED off: Button locked in the “off” position.

Latch Disable

Latch disable may be used to prohibit latching action for individual channel selector buttons and
the MIC ON button. With the Latch Disable submenu selected, press each channel selector button
or the MIC ON button one or more times to select the desired type of operation as follows:

Short LED blink (90% on, 10% off): Latching enabled (default).

3-4 CSI-200 User Instructions

Long LED blink (50% on, 50% off): Latching disabled.

Instant Mic

Talk buttons may be individually programmed to automatically activate the microphone when
pressed. With the Instant Mic submenu selected, press each talk button one or more times to select
the desired type of operation as follows:

Short LED blink (90% on, 10% off): Instant mic off (default).

Long LED blink (50% on, 50% off): Instant mic on.

Reset

To restore the original programming, hold down the CH 1 talk button for about two seconds while
powering up the MCE325.

Table 3.1

VOLUME CONTROL USAGE CHANNEL SELECTOR BUTTON USAGE

CH 1 (VOL 1) CH 2 (VOL 2) 1 TALK 1 LISTEN 2 TALK 2 LISTEN

Configuration 1: Two -2wire lines (CH 1 & CH 2). (Default configuration.)

CH 1 CH 2 CH 1 TALK CH1 LISTEN CH 2 TALK CH 2 LISTEN

Configuration 2: Three or four 2-wire lines (CH 1, CH 2, CH 3, CH 4).

CH 1 & CH 3 CH 2 & CH4 CH 1 TALK &

Configuration 3: One 2-wire line (CH 1); One 4-wire line (CH B).

CH 1 CH B CH 1 TALK CH 1 LISTEN CH B TALK CH B LISTEN

Configuration 4: Two 2-wire lines (CH 1 & CH 2); One 4-wire line (CH B).

CH 1 CH 2 & CH B CH 1 TALK &

Configuration 5: Two 2-wire lines (CH 3 & CH 4); One 4-wire line (CH A).

CH A & CH 3 CH 4 CH A TALK CH A LISTEN CH 3 TALK &

Configuration 6: Two 4-wire lines (CH A & CH B).

CH A CH B CH A TALK CH A LISTEN CH B TALK CH B LISTEN

Front panel control usage for the various intercom line configurations.

LISTEN

LISTEN

CH 2 TALK &
LISTEN

CH 2 TALK &
LISTEN

CH 3 TALK &
LISTEN

CH B TALK CH B LISTEN

LISTEN

CH 4 TALK &
LISTEN

CH 4 TALK &
LISTEN

3-5

3-6 CSI-200 User Instructions

Preventive Maintenance

Clean the unit and verify its performance periodically.

Factory Support Information

Factory support information is located on the first page of this manual.

S ECTION

C

HAPTER

4

M

AINTENANCE

Corrective Maintenance

WARNING: Hazardous voltages exist inside the MCE325. Attempting diagnosis, repair,
or adjustment with the AC line connected could result in serious injury or death. These
servicing instructions are for qualified personnel only.

Access

1 Reference the AS6464 drawing in section 6. Remove the four long screws (item 4) and the two

short screws (item 5).

2 Lift off the top cover.

3 Pull the front panel slightly forward to clear the carbon mic jack on the main circuit board. Lift

the front panel slightly while sliding the back panel toward the rear and out of the lower case.
The MCE325 may now be operated for troubleshooting.

NOTE

when reassembling the bottom cover, make sure the rubber button on the inside of the bottom
cover (item 7) is toward the front of the unit.

Front Panel Removal

1 Unplug the panel mic (J1) and dynamic-mic headset (J2) connectors from the main circuit

board.

4-1

2 The ribbon connector from the front panel board to the main board is attached at both ends with

locking connectors. To unlock the connector, pull the outer shell away from the circuit board.
Then, pull the ribbon cable out.

Cleaning

Clean the front panel and case with alcohol or a mild solution of detergent and water, and then
wipe off detergent residue with a damp rag. Clean the circuit board (if necessary) with a
tetraflouroethane product such as Flux-Off® CZ by Chemtronics®. Use eye protection and avoid
breathing the vapors with these solvents. Also, avoid getting the solvent in any of the
potentiometers.

Test and Adjustment Procedures

Notes

• All AC voltages are RMS unless otherwise specified.

• All input and output levels were measured using an AC voltmeter calibrated for
1 mW = 0.775V at 600 ohms, but with the 600 ohms in the circuit (0 dBu).

• The following procedures involve changing the MCE325 programming. It may be useful to
note the current positions of all jumpers and DIP switches so that they can be returned to their
proper positions after testing.

• The inside of the top cover contains a location diagram for the programming jumpers and DIP
switches. Place it next to the MCE325 during testing for convenient reference.

• Test procedures are written to be performed in the order presented.

Test Equipment

•Variac

• 15 MHz Oscilloscope

•AC Voltmeter

• Frequency Counter

•DC Voltmeter

• Balanced Audio Generator

• 400 Hz to 30 kHz bandpass filter with +40 dB of gain

Power Supply Test

1 Set a variac to 117 VAC, 60 Hz, and connect the MCE325 to the variac. Observe that each

LED blinks on in sequence, and then all LED’s are off.

2 Measure the voltage across the secondary of T1 (between test points E7 and E8 on the main

circuit board).

V

= 18 ±1.8 VAC

sec

3 Measure the DC voltage across the “+” and “-“ terminals of bridge rectifier CR1.

V

= 23 ±2.3 VDC

CR1

4-2 CSI-200 User Instructions

4 Measure the ripple.

V

= 140 mVp-p

ripple

5 Measure the regulated DC voltage at U26 pin 2. (There should be no ripple.)

V

6 Measure the mid-voltage source at U17 pin 7.

V

U17-7

7 Measure the +5 V source at the output of U27 pin 2.

V

= 13.85 ±0.3 VDC

U26-2

= 6.93 ±0.3 VDC

= 5.0 ±0.3 VDC

U27-2

Initial Configuration

1 Set all internal jumpers and DIP switches as follows:

DIP Switches: Set all DIP switches, except DS3, to the default settings listed in Table 2.1. Set
DS3 to on. (This places the MCE325 in four-channel mode. Refer to Figure 1.11 for names of
buttons in standard four-channel mode.)

Jumpers: Set all jumpers, except J24, to the default settings listed in Table 2.2. Set J24 to the
balanced mic position (pins 1 and 2 shorted).

2 Connect a 200-ohm termination resistor across each of the four intercom channels:

CH 1: J8 pins 1 and 2
CH 2: J8 pins 1 and 3
CH 3: J10 pins 1 and 2
CH 4: J10 pins 1 and 3

3 Set all front panel buttons to off.

NOTE

4 Set all volume controls to minimum.

Keying Output Test

1 Connect two 47 k ohm resistors: one from the key 1 output (J22 pin 6) to the +14 VDC supply;

and one from the key 2 output (J22 pin 19) to the +14 VDC supply.

The cathode of D22 serves as a convenient connection point for the +14 VDC supply. (Refer to
the AS6245 drawing in Section 6 for the location of D22.) The key 1 and key 2 outputs require
external pull-up resistors. The key 3 and key 4 outputs have internal pull-up resistors (RP2B
and RP2D respectively) and do not require external pull-ups.

Figure 4.1

Auxiliary connector, J22.

4-3

2 Set the MIC ON button to on. Set all other front panel buttons to off.

3 Check for 13 VDC minimum at the key 1 output.

4 Turn CH 1 TALK on and check for less than 2 VDC at the key 1 output.

5 Repeat steps 3 and 4 for the other channels:

CH2 TALK: key 2 out (J22 pin 19)
CH3 TALK: key 3 out (J22 pin 7)
CH4 TALK: key 4 out (J22 pin 20)

6 Remove the 47 kohm pull-up resistors when finished.

USMB (Un-Switched Microphone Balanced) Frequency Response and Level Check

1 Set all front panel buttons to off.

2 Connect a signal generator to the DYN MIC HEADSET jack mic input (J2 pins 1 & 2).

3 Connect a 600 ohm resistor across the USMB output (J22, pins 1 and 14).

4 Connect an AC voltmeter across the 600 ohm resistor.

5 Verify the output levels for the input frequencies and levels in Table 4.2.

6 Remove the 600 ohm resistor across the USMB output.

Frequency Response and Level Check, Mic to Line

Four-Channel, Two-Wire Mode

1 Activate the MIC ON button. (All other front panel buttons should be off.)

2 Connect an AC voltmeter across the channel 1 output. The signal generator should still be

connected to the dynamic mic input.

3 Activate the CH 1 TALK button.

4 Verify the output levels for the input frequencies and levels in Table 4.3.

5 Repeat for channels 2 through 4 by connecting the AC voltmeter across the appropriate output,

activating the appropriate TALK button, and measuring the output level:

Table 4.1

TALK BUTTON OUTPUT

CH 2 J8, pins 1 and 3

CH 3 J10, pins 1 and 2

CH 4 J10, pins 1 and 3

Table 4.2

INPUT
FREQUENCY INPUT LEVEL OUTPUT LEVEL

1 kHz -55 dBu (1.4 mV)

100 Hz -55 dBu (1.4 mV)

Talk button vs. output.

USMB frequency response and level check.

–45 dBu (4.35 mV)
–25 dBu (43.5 mV)

–45 dBu (4.35 mV)
–25 dBu (43.5 mV)

-1 ±3 dBu (0.49 – 0.98 VAC)

2.5 ±2 dBu (0.83 – 1.32 VAC)
2 ±2 dBu (0.75 – 1.2 VAC)

-0.5 ±3 dBu (0.51 – 1.03 VAC)

4.2 ±2 dBu (0.98 – 1.55 VAC)

4.2 ±2 dBu (0.98 – 1.55 VAC)

4-4 CSI-200 User Instructions

Table 4.2

10 kHz -55 dBu (1.4 mV)

USMB frequency response and level check.

–45 dBu (4.35 mV)
–25 dBu (43.5 mV)

-5.7 ±3 dBu (0.28 – 0.57 VAC)

2.2 ±2 dBu (0.79 – 1.26 VAC)

2.5 ±2dBu (0.83 – 1.32 VAC)

NOTE

Table 4.3

INPUT
FREQUENCY

1 kHz -45 dBu -0.8 ±2 dBu (0.56 – 0.89 VAC)

100 Hz -45 dBu -0.8 ±2 dBu (0.56 – 0.89 VAC)

100 kHz -45 dBu 0.8 ±2 dBu (0.56 – 0.89 VAC)

Mic to line response; 4-channel, 2-wire mode.

INPUT
LEVEL OUTPUT LEVEL

Two-Channel, Four-Wire Mode

1 Remove the 200 ohm terminations from intercom channels 1 through 4.

2 Program the MCE325 to be in two-channel, four-wire mode. (See Table 2.3, configuration 6

for switch settings. See Figure 1.11 for names of buttons in standard two-channel mode.)

3 Connect 200 ohm termination resistors across the four-wire A and four-wire B channels:

Four-Wire A: J8 pins 2 and 3
Four-Wire B: J10 pins 2 and 3

Normally, the four-wire outputs would be terminated with 600 ohms for four-wire operation,
but 200 ohms are used for testing purposes.

4 Set the MIC ON button to on. Set all other front panel buttons to off.

5 Connect an AC voltmeter across the Four-Wire A output.

6 The signal generator should still be connected to the mic input. Set it to 1 kHz, -45 dBu.

NOTE

7 Activate CH 1 TALK.

8 The output level should read –0.8 dBu ±2 dBu (0.56 – 0.89 VAC)

9 Connect the AC voltmeter across the Four-Wire B output.

10Turn off CH 1 TALK and activate CH 2 TALK.

11The output level should read –0.8 dBu ±2 dBu (0.56 – 0.89 VAC)

12Remove the 200 ohm termination resistors.

Sidetone Null Test and Adjustment

This procedure verifies sidetone null operation and optimizes nulling for an ideal 200 ohm line
termination. Since actual intercom line impedance may vary from the ideal, the MCE325 may
have to be readjusted slightly during actual use.

1 Reprogram the MCE325 to be in four-channel, two-wire mode (Table 2.3, configuration 2).

2 Reconnect 200 ohm termination resistors across each of the four intercom channels.

3 Set the MIC ON button to on. Set all other front panel buttons to off.

4 The signal generator should still be connected to the mic input. Set it to 1 kHz, -45 dBu.

5 Activate the CH 1 TALK button.

6 Monitor the AC signal level at U5 pin 7.

7 Adjust R57 (Sidetone 1 on front panel) for maximum null (minimum signal level) at U5 pin 7.

The signal should be 0.025 VAC or less.

4-5

8 Repeat for channels 2 through 4 by activating the TALK buttons, connecting to the test points

and adjusting the potentiometers as indicated in Table 4.4.

True Sidetone Adjust

1 Configure the DYN MIC HEADSET jack for stereo mode (See Section 3, “MONO”)

2 Set all front panel buttons to off.

3 Connect 51 ohm load resistors across the left headphone output (J2 pins 3 and 4) and right

headphone output (J2 pins 3 and 5).

4 Connect an AC voltmeter across the left headphone output.

5 Remove the signal generator from the mic input, and connect it across intercom channel 1.

Adjust the generator output to –1 dBu (0.69 VAC), 1 kHz.

6 Activate the CH 1 TALK button, and adjust the CH 1-3 volume control (R1) until you measure

11.2 dBu (2.82 VAC) across the left headphone output.

7 Disconnect the signal generator from intercom channel 1. Adjust the generator for minimum

output, and reconnect it across the DYN MIC HEADSET jack mic input (J2 pins 1 & 2).
Readjust the generator output level to –45 dBu, 1 kHz.

8 Turn on the MIC ON button.

9 Adjust R37 (sidetone) on the MCE325 main board to obtain 8.7 dBu (2.1 VAC) at the left

headphone output.

Level and Frequency Response Check, Intercom Channel to Headphone

1 Set all front panel buttons to off.

2 Remove the signal generator from the mic input, and reconnect it across intercom channel 1.

3 Adjust the signal generator output to –1 dBu, 1 kHz.

4 Preset the CH 1-3 volume control to the 2 o’clock position.

5 Activate the CH 1 TALK button. The left headphone output level should be 11.2 ±2 dBu (2.2

to 3.6 VAC).

6 Adjust the CH 1-3 volume control to measure 11.2 dBu (2.8 VAC) at the left headphone

output. Check for no distortion or clipping in the output.

7 Adjust the signal generator output to –1 dBu, 100 Hz. The left headphone output should read

10.2 dBu ±2 dBu (1.9 to 3.2 VAC)

8 Adjust the signal generator output to –1 dBu, 10 kHz. The left headphone output should read

7.8 dBu ±2 dBu (1.5 to 2.4 VAC).

9 Repeat the test for channels 2 through 4. For channel 3, continue to use the CH 1-3 volume

control and monitor the left headphone output. For channels 2 and 4, use the CH2-4 volume
control and monitor the right headphone output.

Table 4.4

TALK BUTTON TEST POINT POTENTIOMETER

CH 1 U5 pin 7 R57 (Sidetone 1)

CH 2 U5 pin 1 R73 (Sidetone 2)

CH 3 U7 pin 1 R88 (Sidetone 3)

CH 4 U7 pin 7 R104 (Sidetone 4)

Channel 1-4 sidetone trimmer adjust.

4-6 CSI-200 User Instructions

Level and Frequency Response Check, Intercom Channel to Speaker

1 Set all front panel buttons to off. Set all volume controls to minimum.

2 Connect an 8 ohm load across the speaker output (J27, tip and ring)

3 Connect an AC voltmeter and an oscilloscope across the speaker output.

4 Connect the signal generator to intercom channel 1, and adjust the generator output to –1 dBu,

1 kHz.

5 Set the SPKR ON and CH 1 TALK buttons to on.

6 Rotate the CH 1-3 volume control (R1), and check that the speaker output level reaches +18

dBu (17.4 Vp-p) before clipping.

7 Set the CH 1-3 volume control to get +15 dBu (4.4 VAC) at the speaker output. The volume

control should be approximately at the 2 o’clock position.

8 Activate speaker muting by grounding J22 pin 25 to pin 10. The speaker output level should

drop to 5 mV or less, and the SPKR LED should turn off. Remove the ground connection.

9 Activate speaker dim by grounding U15 pin 9.

10Adjust R157 to the maximum clockwise position. The speaker output should be –5.5dB ±1 dB

below the level set in step 7.

11Adjust R157 to the maximum counter-clockwise position. The speaker output should be –39.5

dB ±2 dB below the reference level set in step 7.

12Reset R157 to the maximum clockwise position, and remove the speaker dim ground (U15 pin

9).

13Set the signal generator to –1 dBu, 100 Hz. The speaker output should be 10.8 dBu ±2 dBu.

14Set the signal generator to –1 dBu, 10 kHz. The speaker output should be 17.5 dBu ±2 dBu.

Level and Frequency Response, Program to Headphones and Speaker

Program A to Left Headphone

1 Set all front panel buttons to off. Set all volume controls to minimum.

2 Set program jumpers J16, J17 and J18 to assign PROGRAM A and PROGRAM B inputs to the

headphones and speaker (pins 1 & 2 shorted on all three jumpers).

3 Remove the signal generator from channel 1, and reconnect it to the PROGRAM A input (J14

tip and ring).

4 Set the signal generator to 0 dBu, 1 kHz.

5 Set the PGM VOL control to maximum.

6 Measure the level at the left headphone output. It should be 1.3 dBu ±2 dBu.

7 Set the signal generator to 0 dBu, 100 Hz. The left headphone output should be 0.8 dBu ±2

dBu.

8 Set the signal generator to 0 dBu, 10 kHz. The left headphone output should be –3.8 dBu ±2

dBu.

9 Reset the generator to 0 dBu, 1 kHz.

10Remove jumper J16 (program not assigned to left headphone). Verify that the signal level

drops at least 35 dB from the reference level in step 9.

4-7

11Restore jumper J16 to short pins 1 & 2.

Program B to Right Headphone

1 Remove the signal from the PROGRAM A input, and connect it to the PROGRAM B input.

2 Measure the level at the right headphone output (J2, 3 & 5). It should be 1.3 dBu ±2 dBu.

(Program volume at maximum.)

3 Set the signal generator to 0 dBu, 100 Hz. The right headphone output should be 0.8 dBu ±2

dBu.

4 Set the signal generator to 0 dBu, 10 kHz. The right headphone output should be –3.8 dBu ±2

dBu.

5 Reset the generator to 0 dBu, 1 kHz.

6 Remove jumper J17 (program not assigned to right headphone). Verify that the signal level

drops at least 35 dB from the reference level in step 2.

7 Restore jumper J17 to short pins 1 & 2.

Program to Speaker

1 Connect the AC voltmeter across the 8 ohm load at the speaker output

2 Set the SPKR ON button to the on position.

3 Measure the level at he speaker output. It should be 6 dBu ±2 dBu. (Program volume at

maximum.)

4 Set the signal generator to 0 dBu, 100 Hz. The speaker output should be 1.3 dBu ±2 dBu.

5 Set the signal generator to 0 dBu, 10 kHz. The speaker output should be 7.3 dBu ±2 dBu.

6 Reset the generator to 0 dBu, 1 kHz.

7 Remove jumper J18 (program not assigned to speaker). Verify that the signal level drops at

least 35 dB from the reference level in step 3.

8 Restore jumper J18 to short pins 1 & 2.

IFB Test

IFB B

1 Set all front panel buttons to off. Set all volume controls to minimum.

2 Move the J5 jumper to short pins 1 and 2 (IFB B assigned to channel 4).

3 Check the output level across intercom channel 4. It should be –9.8 dBu ±2 dBu.

4 Turn on the CH 4 TALK and MIC ON buttons. The channel 4 output should drop at least 45

dB from the reference level in step 3.

5 Turn off the CH 4 TALK and MIC ON buttons.

6 Ground the Key 4 input (short J22 pin 20 to pin 10). The channel 4 output should drop at least

45 dB from the reference level in step 3.

7 Remove the Key 4 ground.

8 Move the J5 jumper to short pins 2 and 3.

4-8 CSI-200 User Instructions

IFB A

1 Move the J4 jumper to short pins 1 and 2 (IFB A assigned to channel 3).

2 Remove the signal from PROGRAM B input, and connect it to the PROGRAM A input. Set

the signal generator to 0 dBu, 1 kHz.

3 Check the output level across intercom channel 3. It should be –9.8 dBu ±2 dBu.

4 Turn on the CH 3 TALK and MIC ON buttons. The channel 3 output should drop at least 45

dB from the reference level in step 3.

5 Turn off the CH 3 TALK and MIC ON buttons.

6 Ground the Key 3 input (short J22 pin 7 to pin 10). The channel 3 output should drop at least

45 dB from the reference level in step 3.

7 Remove the Key 3 ground.

8 Move the J4 jumper to short pins 2 and 3.

Level and Frequency Response Check, Four-Wire Input to Headphone

Four-Wire A Input to Left Headphone

1 Set all front panel buttons to off. Set all volume controls to minimum.

2 Remove the signal generator from the Program A input, and connect it to the Four-Wire A

input (AUXILIARY connector J22, pins 8 and 21). Set the generator to 0 dBu, 1 kHz.

3 Move jumper J19 to short pins 3 & 4 (Four-Wire A input always on).

4 Set the CH 1-3 volume control to measure 0 dBu at the left headphone output. (The control

should be at about the 2 o’clock position.)

5 Set the signal generator to 0 dBu, 100 Hz. The left headphone output should be –0.9 dBu ±2

dBu.

6 Set the signal generator to 0 dBu, 10 kHz. The left headphone output should be –4.7 dBu ±2

dBu.

7 Move jumper J19 to short pins 2 & 3 (Four-Wire A input off).

Four-Wire B input to Right Headphone

1 Remove the signal from the Four-Wire A input, and connect it to the Four-Wire B input (J22,

pins 9 & 22).

2 Move jumper J20 to short pins 3 & 4 (Four-Wire B input always on).

3 Set the CH 2-4 volume control to measure 0 dBu at the right headphone output. (The control

should be at about the 2 o’clock position.)

4 Set the signal generator to 0 dBu, 100 Hz. The right headphone output should be –0.9 dBu ±2

dBu.

5 Set the signal generator to 0 dBu, 10 kHz. The right headphone output should be –4.7 dBu ±2

dBu.

6 Move jumper J20 to short pins 2 &3 (Four-Wire B input off).

4-9

Panel Mic to Channel Test

1 Turn all front panel buttons off. Set all volume controls to minimum.

2 Remove the signal from the Four-Wire B input and reconnect it to the panel mic input (J28 tip

and ring, it is easiest to connect to the back of the connector.).

3 Set the signal generator to –25 dBu, 1 kHz.

4 Turn on the CH 1 TALK, MIC ON and PANEL MIC buttons.

5 Check the channel 1 output. It should be –0.9 dBu ±2 dBu.

Carbon Mic to Channel Test

1 Turn off the PANEL MIC and MIC ON buttons. (Only the CH 1 TALK LED should be on.)

2 Connect a 470 ohm resistor across the CARBON MIC HEADSET jack (J3 tip and ring). The

MIC ON LED should turn on.

3 Remove the signal from the panel mic input, and reconnect it to the CARBON MIC

HEADSET jack.

4 Set the signal generator to 11.2 dBu, 1 kHz.

5 Check the channel 1 output. It should be –0.9 dBu ±2 dBu.

6 Remove the 470 ohm resistor from the carbon mic input.

VOX Test

1 Remove the signal from the CARBON MIC HEADSET jack, and reconnect it to the DYN

MIC HEADSET jack mic input (J2 pins 1 & 2).

2 Set the generator to –45 dBu, 1 kHz.

3 Set DIP switch DS8 to the on position (VOX enabled), and note that the MIC ON LED turns

on.

4 Adjust the signal generator output level to zero, and note that the MIC ON LED turns off.

5 Reset DS8 to off.

Mic Kill Receive Test

1 Set all buttons to off.

2 Remove the signal from the DYN MIC HEADSET jack mic input, and reconnect it to intercom

channel 1.

3 Adjust signal generator to –5 dBu, 24 kHz (check frequency with frequency counter).

4 Set the MIC ON button to on.

5 Activate the CH 1 TALK button. The MIC ON LED should turn off.

6 Attenuate the signal input by 20 dB. Try turning on the MIC ON button. It should not turn on.

7 Attenuate the signal an additional 10 dB. Try turning on the MIC ON button. It should turn on.

8 Adjust signal generator to –5 dBu at 22.320 kHz.

9 Try turning the MIC ON button on and off. It should turn on and off as usual.

10Adjust the signal generator to –5 dBu at 23.520 kHz.

4-10 CSI-200 User Instructions

11Try turning the MIC ON button on. It should not stay on.

12Adjust signal generator to –5 dBu at 25.680 kHz.

13Try turning the MIC ON button on and off. It should turn on and off as usual.

14Adjust signal generator to –5 dBu at 24.480 kHz.

15Try turning the MIC ON button on. It should not stay on.

16Remove the signal generator from channel 1.

Mic Kill Transmit Test

1 Set all front panel buttons to off.

2 Connect a frequency counter an AC meter to the intercom channel 1 output.

3 Transmit a mic kill signal on intercom channel 1 (tap the CALL button 3 times, then press and

hold the CH 1 TALK key).

4 Check that the signal on the channel 1 output is between 23.7 to 23.9 kHz at –9.8 dBu ±2 dBu.

5 Release the CH 1 TALK button.

Call Transmit Test

1 Set all front panel buttons to off.

2 Transmit a call signal on intercom channel 1 (tap the CALL button, and while the call LED is

flashing, press and hold the CH 1 TALK key).

3 Check that the signal on the channel 1 output is between 19.9 to 20.1 kHz at –9.8 dBu ±2 dBu.

4 Release the CH 1 TALK button.

Call Receive Test

1 Set all buttons to off.

2 Reconnect the signal generator to intercom channel 1.

3 Adjust signal generator to –5 dBu, 20 kHz (check frequency with frequency counter).

4 Check that the CALL and CH 1 TALK LED’s are flashing.

5 Attenuate the signal input by 20 dB, and check that the LED’s are still flashing.

6 Attenuate the signal an additional 10 dB. The LED’s should stop flashing.

7 Adjust signal generator to –5 dBu, 18.600 kHz.

8 Verify that the LED’s do not flash.

9 Adjust signal generator to –5 dBu, 21.400 kHz.

10Verify that the LED’s do not flash.

11Adjust signal generator to –5 dBu, 19.600 kHz.

12Verify that the LED’s do flash.

13Adjust signal generator to –5 dBu, 20.400 kHz.

14Verify that the LED’s do flash.

15Remove the signal generator and frequency counter.

4-11

ISO Test

1 Set DIP switch DS3 to off (two-channel, two-wire mode).

2 Set DIP switch DS5 to on (talk muted during ISO).

3 Set all TALK and LISTEN buttons to on.

4 Connect a 100 ohm resistor from the ISO input (J22 pin 12) to circuit common (J22 pin 10).

Observe that the MIC ON LED turns on and the channel 1 and 2 TALK buttons turn off.

5 Remove the 100 ohm resistor across the ISO input.

6 Reset DIP switch DS3 to on and DS5 to off.

Remote Mic Switch Test

1 Set all buttons to off.

2 Connect a 100 ohm resistor from the remote mic switch input (J22 pin 25) to circuit common

(J22 pin 10), and observe that the MIC ON LED turns on.

3 Remove the 100 ohm resistor.

Program Lockout Test

1 Set DIP switch DS4 to on (front panel setup lockout enabled).

2 Press and hold the CALL button for ten seconds, and verify that the MCE325 does not enter

program mode.

3 Reset DS4 to off.

Noise Checks

1 Connect a 150 ohm load across the dynamic mic input (J2 pins 1 and 2).

2 Connect an 8 ohm load across the speaker output.

3 Connect 51 ohm loads across the left headphone output (J2 pins 3 & 4) and right headphone

output (J2 pins 3 &5).

4 Terminate each intercom channel into 200 ohms.

5 Set the MIC ON button to on.

6 Set the SPKR ON button to on.

7 Set all other front panel buttons to off.

8 Set all volume controls to minimum.

Note: Noise measurements in the following steps were made using a 30 kHz low pass filter
with +20 dB of gain inserted between the AC voltmeter and the MCE325.

9 Set the CH 1-3 volume control to maximum. Measure noise across the left headphone output. It

should measure -44 dBu or less.

10Set the CH 1-3 volume control to minimum and set the CH 2-4 volume control to maximum.

Measure noise across the right headphone output. It should measure –44 dBu or less.

11Set the CH 2-4 volume control to minimum. Measure noise across the speaker output. The

meter should read –44 dBu or less.

4-12 CSI-200 User Instructions

NOTE

12Turn on the SPKR ON button. The meter should read –38 dBu or less. Turn off the SPKR ON

button.

Noise measurements in the following steps were made using a 400 Hz to 30 kHz bandpass
filter with +40 dB of gain.

13Turn on the MIC ON switch. Measure noise at U1 pin 1 (mic preamp out). The voltmeter

should read –26 dBu or less.

14Turn on the PANEL MIC button. The meter should read –37 dBu or less.

15Turn all buttons off.

16Measure noise at U12 pin 7 (program A preamp out). The voltmeter should read –51 dBu or

less.

17Measure noise at U12 pin 1 (program B preamp out). The voltmeter should read –51 dBu or

less.

18Measure noise across intercom channels 1 through 4. All should measure –50 dBu or less.

4-13

4-14 CSI-200 User Instructions

Packaging Assembly (9000-6464-00)

S ECTION

C

HAPTER

5

P

ARTS

L

ISTS

Table 5.1

Item No. Description RTS Part No.

Reference PD6464 Drawing, Section 6

1 User Manual, MCE325 User Station 9350-6464-00

2 Label, Warning 9170-6739-00

3 Final Assy, MCE325 9010-6464-00

4 Assy, 200-ohm Termination Plug 9020-6793-00

5 Keycap, Blank 2705-0020-00

Keycap, Printed (TALK 3) 9150-6643-09

Keycap, Printed (TALK 4) 9150-6643-10

Keycap, Printed (IFB 1) 9150-6643-11

Keycap, Printed (IFB 2) 9150-6643-12

Keycap, Printed (LISTEN 3) 9150-6643-13

Keycap, Printed (LISTEN 4) 9150-6643-14

Keycap, Printed (SSA 1) 9150-6643-15

Keycap, Printed (SSA 2) 9150-6643-16

Keycap, Printed (PAGE) 9150-6643-10

6 Keycap, Stem 4501-0064-00

Final Assembly, MCE325 (9010-6464-00)

Table 5.2

Item No. Description RTS Part No.

Reference AS6464 Drawing, Section 6

1 Front Panel Assy, MCE325 9020-6261-00

2 Back Panel Assy, MCE325 9020-6262-00

3 Case, MCE/MCS 9060-6260-00

4 MCE/MCS Case Screw 9160-6305-00

5 Screw, #4-40 x 1/4 1008-4081-00

6 Valox Film, 0.010” Thick N/A

7 Rubber Stick-on Button 4501-5012-00

8 Label, Programming and FCC Notice 9170-6776-00

9 Lug, Solder, #16 1003-0003-00

5-1

Front Panel Assembly (9020-6261-00)

Table 5.3

Reference AS6261 Drawing, Section 6

Item No. Description RTS Part No.

1 Bezel, MCE325 9070-6261-00

2 PC Board Assy, Front Panel, MCE325 9030-6246-00

3 Bushing Adapter 9110-6273-00

5 Keycap Stem 4501-0064-00

6 Knob, Channel Volume, MCE325 2703-0033-00

7 Knob, Program Volume, MCE325 2703-0034-00

8 Lightpipe, Button Indicator 4501-0061-00

9 Connector Insert, 6-pin Female (J2) 2018-0077-00

10 Plug, Panel Microphone 4501-0063-00

11 Lightpipe, Call Indicator 4501-0062-00

12 Screw, Thread Forming 51856-003

13 Connector Housing, 3-pin (P1) 59958-003

14 Phone Jack with Metal Bushing (J28) 2013-0048-00

15 Connector Housing, 6-pin (P2) 59958-006

16 Contact, Housing 59958-200

17 Flex Cable, 0.050” Centers 2515-0013-00

20 Keycap, Printed (TALK 1) 9150-6643-01

21 Keycap, Printed (LISTEN 1) 9150-6643-02

22 Keycap, Printed (TALK 2) 9150-6643-03

23 Keycap, Printed (LISTEN 2) 9150-6643-04

24 Keycap, Printed (CALL) 9150-6643-05

25 Keycap, Printed (PANEL MIC) 9150-6643-06

26 Keycap, Printed (SPKR ON) 9150-6643-07

27 Keycap, Printed (MIC ON) 9150-6643-08

5-2 CSI-200 User Instructions

Back Panel Assembly (9020-6262-00)

Table 5.4

Reference AS6262 Drawing, Section 6

Item No. Description RTS Part No.

1 PC Board Assy, Main 9030-6245-00

2 Heatsink Assy 9020-6324-00

3 Panel, Rear 9080-6262-00

4 Jack, Phone, 3 conductor, double closed circuit (J27) 2013-0003-00

5 Connector Housing (P23) 57767-203

6 cord, AC Power, Gray 2504-0004-00

7 Strain Relief, Flexible 2509-0025-00

8 Fuse, 0.5A, 250V Slo-blo 50547-015

9 Fuse Cap 57074-006

10 Fuse Holder body w/mtg Nut 2802-0003-00

11 Terminal, Wire Joint, Nylong 2017-0013-00

12 Screw, #4-40 x ¼ 1008-4023-00

13 Nut, Hex Kep, #4-40 1007-0001-00

15 Nut, Hex Kep, #4-40 1007-0002-00

16 Lug, Solder, #16 51378-002

17 Shrink Tubing LP

Heatsink Assembly (9020-6324-00)

Table 5.5

Reference 9020-6324-00 Drawing, Section 6

Item No. Description RTS Part No.

1 Heatsink, Model MCE325 9180-6324-01

2 IC LM4752T 511386000S

3 Adj. Regulatro, 3 Terminal, LM317T 53290000

4 Insulator 57896000

5 Washer, Nylon Shoulder 1006004000

6 Washer 50013035

7 Washer, Compression 1006004100

8 Screw PH, Cross 51845040

9 Thermal Compound 51741000

Main PC Board Assembly (9030-6245-01)

Table 5.6

Ref No. Description RTS Part No.

C1 Capacitor, EL, 100µF, 25V 51821524

C10 Capacitor, CM, 0.1µF, 50V 52676113

C100 Capacitor, Mylar, 1nF, 100V 1514R1022L

C101 Capacitor, CM, 0.1µF, 50V 52676113

C102 Capacitor, CM, 0.1µF, 50V 52676113

C103 Capacitor, EL, 10µF, 50V 51821110

Reference 9027-6245-01 Drawing, Section 6

5-3

Table 5.6

C104 Capacitor, CM, 0.1µF, 50V 52676113

C105 Capacitor, EL, 100µF, 25V 51821524

C106 Capacitor, EL, 4.7µf, 25V 51821621

C107 Capacitor, EL, 4.7µf, 25V 51821622

C108 Capacitor, EL, 100µF, 25V 51821524

C109 Capacitor, EL, 1000µF, 25V 51821526

C11 Capacitor, CM, 0.1µF, 50V 52676113

C110 Capacitor, CM, 0.1µF, 50V 52676113

C111 Capacitor, CM, 0.1µF, 50V 52676113

C112 Capacitor, EL, 220µF, 50V 52157534

C113 Capacitor, EL, 220µF, 50V 52157534

C115 Capacitor, CD, 10pF, 500V 52157502

C116 Capacitor, CD, 10pF, 500V 52157502

C117 Capacitor, CD, 10pF, 500V 52157502

C118 Capacitor, CM, 0.1µF, 50V 52676113

C119 Capacitor, Mylar, 0.01µF, 50V 52719007

C12 Capacitor, EL, 10µF, 50V 51821110

C120 Capacitor, CD, 100pF, 100V 1501R1011L

C121 Capacitor, CD, 10pF, 500V 52157502

C122 Capacitor, CM, 0.1µF, 50V 52676113

C125 Capacitor, EL, 4700µF, 35V 1513R4784G

C126 Capacitor, CD, 0.1µF, 500V 1510R1042Q

C127 Capacitor, EL, 10µF, 50V 51821110

C128 Capacitor, EL, 10µF, 50V 51821110

C129 Capacitor, EL, 100µF, 25V 51821524

C13 Capacitor, CM, 0.1µF, 50V 52676113

C130 Capacitor, CM, 0.1µF, 50V 52676113

C131 Capacitor, EL, 10µF, 50V 51821110

C132 Capacitor, CM, 0.1µF, 50V 52676113

C133 Capacitor, EL, 100µF, 25V 51821524

C134 Capacitor, CM, 0.1µF, 50V 52676113

C135 Capacitor, EL, 22µF, 50V 51821640

C136 Capacitor, CM, 0.1µF, 50V 52676113

C137 Capacitor, CM, 0.1µF, 50V 52676113

C138 Capacitor, CM, 0.1µF, 50V 52676113

C139 Capacitor, CM, 0.1µF, 50V 52676113

C14 Capacitor, EL, 100µF, 25V 51821524

C140 Capacitor, CM, 0.1µF, 50V 52676113

C141 Capacitor, CM, 0.1µF, 50V 52676113

C142 Capacitor, EL, 4.7µf, 25V 51821623

C143 Capacitor, EL, 4.7µf, 25V 51821624

C15 Capacitor, Mylar, 150pF, 100V 52157332

C16 Capacitor, CM, 0.1µF, 50V 52676113

C17 Capacitor, EL, 1µF, 50V 51821106

C18 Capacitor, CD, 100pF, 100V 1501R1011L

C19 Capacitor, CD, 100pF, 100V 1501R1011L

Reference 9027-6245-01 Drawing, Section 6

5-4 CSI-200 User Instructions

Table 5.6

C2 Capacitor, EL, 10µF, 50V 51821110

C20 Capacitor, CD, 100pF, 100V 1501R1011L

C21 Capacitor, CD, 100pF, 100V 1501R1011L

C22 Capacitor, CM, 0.1µF, 50V 52676113

C23 Capacitor, CD, 10pF, 500V 52157502

C24 Capacitor, CM, 0.1µF, 50V 52676113

C25 Capacitor, EL, 22µF, 50V 51821640

C26 Capacitor, EL, 47µF, 16V 51821068

C27 Capacitor, EL, 22µF, 50V 51821640

C28 Capacitor, CD, 100pF, 100V 1501R1011L

C29 Capacitor, CD, 100pF, 100V 1501R1011L

C3 Capacitor, EL, 100µF, 25V 51821524

C30 Capacitor, CD, 100pF, 100V 1501R1011L

C31 Capacitor, CD, 100pF, 100V 1501R1011L

C32 Capacitor, CM, 0.1µF, 50V 52676113

C33 Capacitor, CD, 10pF, 500V 52157502

C34 Capacitor, EL, 47µF, 16V 51821068

C35 Capacitor, EL, 22µF, 50V 51821640

C36 Capacitor, EL, 22µF, 50V 51821640

C37 Capacitor, CD, 100pF, 100V 1501R1011L

C38 Capacitor, CD, 100pF, 100V 1501R1011L

C39 Capacitor, CD, 100pF, 100V 1501R1011L

C4 Capacitor, CM, 1nF, 50V 52676101

C40 Capacitor, CD, 100pF, 100V 1501R1011L

C41 Capacitor, CM, 0.1µF, 50V 52676113

C42 Capacitor, CD, 10pF, 500V 52157502

C43 Capacitor, CM, 0.1µF, 50V 52676113

C44 Capacitor, EL, 22µF, 50V 51821640

C45 Capacitor, EL, 47µF, 16V 51821068

C46 Capacitor, EL, 22µF, 50V 51821640

C47 Capacitor, CD, 100pF, 100V 1501R1011L

C48 Capacitor, CD, 100pF, 100V 1501R1011L

C49 Capacitor, CD, 100pF, 100V 1501R1011L

C5 Capacitor, EL, 100µF, 25V 51821524

C50 Capacitor, CD, 100pF, 100V 1501R1011L

C51 Capacitor, CM, 0.1µF, 50V 52676113

C52 Capacitor, CD, 10pF, 500V 52157502

C53 Capacitor, EL, 22µF, 50V 51821640

C54 Capacitor, EL, 47µF, 16V 51821068

C55 Capacitor, EL, 22µF, 50V 51821640

C56 Capacitor, CM, 0.1µF, 50V 52676113

C57 Capacitor, EL, 22µF, 50V 51821640

C58 Capacitor, CM, 0.1µF, 50V 52676113

C59 Capacitor, CD, 100pF, 100V 1501R1011L

C6 Capacitor, CM, 1nF, 50V 52676101

C60 Capacitor, EL, 10µF, 50V 51821110

Reference 9027-6245-01 Drawing, Section 6

5-5

Table 5.6

C61 Capacitor, Mylar, 1nF, 100V 1514R1022L

C62 Capacitor, EL, 10µF, 50V 51821110

C63 Capacitor, CD, 100pF, 100V 1501R1011L

C64 Capacitor, Mylar, 1nF, 100V 1514R1022L

C65 Capacitor, CM, 0.1µF, 50V 52676113

C66 Capacitor, EL, 10µF, 50V 51821110

C67 Capacitor, Mylar, 1nF, 100V 1514R1022L

C68 Capacitor, EL, 10µF, 50V 51821110

C69 Capacitor, CD, 100pF, 100V 1501R1011L

C7 Capacitor, CM, 1nF, 50V 52676101

C70 Capacitor, Mylar, 1nF, 100V 1514R1022L

C71 Capacitor, EL, 10µF, 50V 51821110

C72 Capacitor, Mylar, 1nF, 100V 1514R1022L

C73 Capacitor, EL, 10µF, 50V 51821110

C74 Capacitor, CD, 100pF, 100V 1501R1011L

C75 Capacitor, Mylar, 1nF, 100V 1514R1022L

C76 Capacitor, CM, 0.1µF, 50V 52676113

C77 Capacitor, EL, 10µF, 50V 51821110

C78 Capacitor, EL, 10µF, 50V 51821110

C79 Capacitor, CD, 100pF, 100V 1501R1011L

C8 Capacitor, CM, 0.1µF, 50V 52676113

C80 Capacitor, Mylar, 1nF, 100V 1514R1022L

C81 Capacitor, Mylar, 1nF, 100V 1514R1022L

C82 Capacitor, EL, 1µF, 50V 51821106

C83 Capacitor, EL, 10µF, 50V 51821110

C84 Capacitor, CD, 100pF, 100V 1501R1011L

C84 500PF 52157018

C85 Capacitor, CM, 0.1µF, 50V 52676113

C86 Capacitor, EL, 10µF, 50V 51821110

C87 Capacitor, EL, 10µF, 50V 51821110

C88 Capacitor, CM, 0.1µF, 50V 52676113

C89 Capacitor, EL, 10µF, 50V 51821110

C9 Capacitor, CM, 0.1µF, 50V 52676113

C90 Capacitor, EL, 10µF, 50V 51821110

C91 Capacitor, CM, 0.1µF, 50V 52676113

C92 Capacitor, Mylar, 1nF, 100V 1514R1022L

C93 Capacitor, CM, 0.1µF, 50V 52676113

C94 Capacitor, CM, 0.1µF, 50V 52676113

C95 Capacitor, EL, 10µF, 50V 51821110

C96 Capacitor, CM, 0.1µF, 50V 52676113

C97 Capacitor, EL, 100µF, 25V 51821524

C98 Capacitor, CM, 0.1µF, 50V 52676113

C99 Capacitor, CM, 0.1µF, 50V 52676113

CR1 Bridge Rectifier, 4A, 50VRMS 1601097000

D1 Diode, 1N4004 50745005T

D10 Diode, 1N4004 50745005T

Reference 9027-6245-01 Drawing, Section 6

5-6 CSI-200 User Instructions

Table 5.6

D11 Diode, 1N4004 50745005T

D12 Diode, 1N4004 50745005T

D13 Diode, 1N4004 50745005T

D14 Diode, 1N914B 160109140B

D15 Diode, 1N914B 160109140B

D16 Diode, 1N914B 160109140B

D2 Diode, 1N914B 160109140B

D20 Diode, 1N4004 50745005T

D21 Diode, 1N4004 50745005T

D22 Diode, 1N4004 50745005T

D3 Diode, 1N914B 160109140B

D4 Diode, 1N914B 160109140B

D5 Diode, 1N914B 160109140B

D6 Diode, 1N4004 50745005T

D7 Diode, 1N4004 50745005T

D8 Diode, 1N4004 50745005T

D9 Diode, 1N4004 50745005T

FB1 #73 SHIELD BEAD 2404000100

FB2 #73 SHIELD BEAD 2404000100

FB3 #73 SHIELD BEAD 2404000100

FB4 #73 SHIELD BEAD 2404000100

J1 Connector, 3-pin 59958103

J10 Connector, Audio 59893001

J14 Jack, PC Mt., 3/8 2013004900

J15 Jack, PC Mt., 3/8 2013004900

J16 Header, 3-pin 2007009900

J17 Header, 3-pin 2007009900

J18 Header, 3-pin 2007009900

J19 Header, 4-pin 2007013400

J2 Connector, 6-pin 59958106

J20 Header, 4-pin 2007013400

J21 Connector 2006009600

J22 Connector, D-Sub, 25-pin 2004004000

J23 Header, 3-pin 2007011800

J24 Header, 3-pin 2007009900

J3 Jack, PC Mt., 3/8 2013004900

J4 Header, 3-pin 2007009900

J5 Header, 3-pin 2007009900

J6 Header, 3-pin 2007009900

J7 Header, 3-pin 2007009900

J8 Connector, Audio 59893001

J9 Connector, Audio 59892001

Q1 Transistor, 2N5087 1602508700

Q10 Transistor, 2N5460 1602546000

Q2 Transistor, 2N5210 1602521000

Q3 Transistor, 2N5484 1602548400

Reference 9027-6245-01 Drawing, Section 6

5-7

Table 5.6

Q4 Transistor, 2N5210 1602521000

Q5 Transistor, 2N5210 1602521000

R1 Resistor, CF, 1K Ohm, 5%, 1/8W 52154060

R10 Resistor, MF, 3.01K Ohm, 1%, 1/8W 54034301

R100 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R101 Resistor, CF, 10K Ohm, 5%, 1/8W 52154036

R104 Trimpot, 10K Ohm, Linear 1409006000

R105 Resistor, MF, 60.4K Ohm, 1%, 1/8W 54035604

R106 Resistor, MF, 20K Ohm, 1%, 1/8W 54035200

R107 Resistor, MF, 60.4K Ohm, 1%, 1/8W 54035604

R108 Resistor, MF, 20K Ohm, 1%, 1/8W 54035200

R109 Resistor, CF, 100 Ohm, 5%, 1/8W 52154084

R11 Resistor, CF, 620 Ohm, 5%, 1/8W 52154065

R110 Resistor, CF, 100K Ohm, 5% 1/8W 52154012

R117 Resistor, MF, 20K Ohm, 1%, 1/8W 54035200

R118 Resistor, MF, 10K Ohm, 1%, 1/8W 54035100

R119 Resistor, MF, 20K Ohm, 1%, 1/8W 54035200

R12 Resistor, CF, 1K Ohm, 5%, 1/8W 52154060

R120 Resistor, MF, 10K Ohm, 1%, 1/8W 54035100

R124 Resistor, MF, 20K Ohm, 1%, 1/8W 54035200

R125 Resistor, MF, 10K Ohm, 1%, 1/8W 54035100

R126 Resistor, MF, 20K Ohm, 1%, 1/8W 54035200

R127 Resistor, MF, 10K Ohm, 1%, 1/8W 54035100

R13 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R130 Resistor, MF, 20K Ohm, 1%, 1/8W 54035200

R131 Resistor, MF, 10K Ohm, 1%, 1/8W 54035100

R132 Resistor, MF, 20K Ohm, 1%, 1/8W 54035200

R133 Resistor, MF, 10K Ohm, 1%, 1/8W 54035100

R135 Resistor, CF, 10K Ohm, 5%, 1/8W 52154036

R138 Resistor, MF, 20K Ohm, 1%, 1/8W 54035200

R139 Resistor, MF, 10K Ohm, 1%, 1/8W 54035100

R14 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R140 Resistor, MF, 20K Ohm, 1%, 1/8W 54035200

R141 Resistor, MF, 10K Ohm, 1%, 1/8W 54035100

R142 Resistor, CF, 10K Ohm, 5%, 1/8W 52154036

R15 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R152 Resistor, CF, 200 Ohm, 5%, 1/8W 52154077

R153 Resistor, CF, 220K Ohm, 5%, 1/8W 52154004

R153 160K 52154007

R154 Resistor, CF, 47K Ohm, 5%, 1/8W 52154020

R155 Resistor, CF, 47K Ohm, 5%, 1/8W 52154020

R156 Resistor, CF, 100K Ohm, 5% 1/8W 52154012

R156 Resistor, MF, 20K Ohm, 1%, 1/8W 54035200

R157 Trimpot, 20K Ohm, Linear 57148407

R16 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R17 Resistor, CF, 100 Ohm, 5%, 1/4W 52154305

Reference 9027-6245-01 Drawing, Section 6

5-8 CSI-200 User Instructions

Table 5.6

R170 Resistor, CF, 10K Ohm, 5%, 1/8W 52154036

R171 Resistor, CF, 10K Ohm, 5%, 1/8W 52154036

R172 Resistor, MF, 201 Ohm, 1%, 1/8W 54032301

R173 Resistor, CF, 100K Ohm, 5% 1/8W 52154012

R174 Resistor, MF, 201 Ohm, 1%, 1/8W 54032301

R175 Resistor, CF, 100K Ohm, 5% 1/8W 52154012

R176 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R177 Resistor, CF, 100K Ohm, 5% 1/8W 52154012

R178 Resistor, CF, 1M Ohm, 5%, 1/8W 52154988

R18 Resistor, CF, 100 Ohm, 5%, 1/4W 52154305

R180 Resistor, CF, 1K Ohm, 5%, 1/8W 52154060

R181 Resistor, CF, 2.7 Ohm, 5%, 1/8W 52154122

R182 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R183 Resistor, CF, 10 Ohm, 5%, 1/8W 52154108

R184 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R185 Resistor, CF, 100K Ohm, 5% 1/8W 52154012

R186 Resistor, CF, 1K Ohm, 5%, 1/8W 52154060

R187 Resistor, CF, 2.7 Ohm, 5%, 1/8W 52154122

R188 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R189 Resistor, CF, 10 Ohm, 5%, 1/8W 52154108

R19 Resistor, CF, 620 Ohm, 5%, 1/8W 52154065

R198 Resistor, CF, 270K Ohm, 5%, 1/8W 52154002

R199 Resistor, CF, 10K Ohm, 5%, 1/8W 52154036

R2 Resistor, Cf, 2K Ohm, 5%, 1/8W 52154053

R20 Resistor, CF, 100K Ohm, 5% 1/8W 52154012

R200 Resistor, CF, 2.2M Ohm, 5%, 1/8W 52154980

R201 Resistor, MF, 3.01K Ohm, 1%, 1/8W 54034301

R207 Resistor, CF, 100K Ohm, 5% 1/8W 52154012

R208 Resistor, CF, 10K Ohm, 5%, 1/8W 52154036

R209 Resistor, CF, 1K Ohm, 5%, 1/8W 52154060

R21 Resistor, CF, 47K Ohm, 5%, 1/8W 52154020

R211 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R212 Resistor, CF, 270K Ohm, 5%, 1/8W 52154002

R213 Resistor, CF, 270K Ohm, 5%, 1/8W 52154002

R214 Resistor, CF, 10K Ohm, 5%, 1/8W 52154036

R215 Resistor, CF, 100K Ohm, 5% 1/8W 52154012

R22 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R23 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R24 Resistor, CF, 100K Ohm, 5% 1/8W 52154012

R26 Resistor, CF, 5.1M Ohm, 5%, 1/8W 52154698

R261 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R262 Resistor, MF, 3.01K Ohm, 1%, 1/8W 54034301

R263 Resistor, MF, 201 Ohm, 1%, 1/8W 54032301

R264 Resistor, CF, 220K Ohm, 5%, 1/8W 52154004

R265 Resistor, CF, 220K Ohm, 5%, 1/8W 52154004

R266 Resistor, MF, 909 Ohm, 1%, 1/8W 54032909

Reference 9027-6245-01 Drawing, Section 6

5-9

Table 5.6

R267 Resistor, MF, 201 Ohm, 1%, 1/8W 54032301

R268 Resistor, CF, 200 Ohm, 5%, 1/8W 52154077

R269 Resistor, CF, 10K Ohm, 5%, 1/8W 52154036

R27 Resistor, CF, 200 Ohm, 5%, 1/8W 52154077

R28 Resistor, CF, 22K Ohm, 5%, 1/8W 52154010

R29 Resistor, CF, 5.1M Ohm, 5%, 1/8W 52154698

R3 Resistor, CF, 100 Ohm, 5%, 1/8W 52154084

R30 Resistor, CF, 100K Ohm, 5% 1/8W 52154012

R31 Resistor, CF, 5.1M Ohm, 5%, 1/8W 52154698

R32 Resistor, CF, 100K Ohm, 5% 1/8W 52154012

R33 Resistor, CF, 15K Ohm, 5%, 1/8W 52154032

R34 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R35 Resistor, CF, 100K Ohm, 5% 1/8W 52154012

R36 Resistor, CF, 10K Ohm, 5%, 1/8W 52154036

R37 Trimpot, 10K Ohm, w/knob 57148406

R38 Resistor, CF, 100 Ohm, 5%, 1/8W 52154084

R39 Resistor, Cf, 2K Ohm, 5%, 1/8W 52154053

R4 Resistor, CF, 100K Ohm, 5% 1/8W 52154012

R40 Resistor, CF, 30K Ohm, 5%, 1/8W 52154025

R41 Resistor, CF, 470K Ohm, 5%, 1/8W 52154996

R42 Resistor, CF, 100K Ohm, 5% 1/8W 52154012

R43 Resistor, MF, 20K Ohm, 1%, 1/8W 54035200

R44 Resistor, CF, 2.7 Ohm, 5%, 1/8W 52154122

R45 Resistor, CF, 2.7 Ohm, 5%, 1/8W 52154122

R46 Resistor, MF, 20K Ohm, 1%, 1/8W 54035200

R47 Resistor, MF, 20K Ohm, 1%, 1/8W 54035200

R48 Resistor, CF, 10K Ohm, 5%, 1/8W 52154036

R49 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R5 Resistor, CF, 100K Ohm, 5% 1/8W 52154012

R50 Resistor, CF, 10K Ohm, 5%, 1/8W 52154036

R51 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R52 Resistor, CF, 47K Ohm, 5%, 1/8W 52154020

R53 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R54 Resistor, MF, 20K Ohm, 1%, 1/8W 54035200

R55 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R57 Trimpot, 10K Ohm, Linear 1409006000

R58 Resistor, MF, 60.4K Ohm, 1%, 1/8W 54035604

R59 Resistor, MF, 20K Ohm, 1%, 1/8W 54035200

R6 Resistor, CF, 1K Ohm, 5%, 1/8W 52154060

R60 Resistor, CF, 100K Ohm, 5% 1/8W 52154012

R61 Resistor, MF, 60.4K Ohm, 1%, 1/8W 54035604

R62 Resistor, MF, 20K Ohm, 1%, 1/8W 54035200

R63 Resistor, CF, 100 Ohm, 5%, 1/8W 52154084

R64 Resistor, CF, 100K Ohm, 5% 1/8W 52154012

R65 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R66 Resistor, CF, 47K Ohm, 5%, 1/8W 52154020

Reference 9027-6245-01 Drawing, Section 6

5-10 CSI-200 User Instructions

Table 5.6

R67 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R68 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R69 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R7 Resistor, MF, 301 Ohm, 1%, 1/8W 54034150

R70 Resistor, CF, 10K Ohm, 5%, 1/8W 52154036

R73 Trimpot, 10K Ohm, Linear 1409006000

R74 Resistor, MF, 60.4K Ohm, 1%, 1/8W 54035604

R75 Resistor, MF, 20K Ohm, 1%, 1/8W 54035200

R76 Resistor, MF, 60.4K Ohm, 1%, 1/8W 54035604

R77 Resistor, MF, 20K Ohm, 1%, 1/8W 54035200

R78 Resistor, CF, 100 Ohm, 5%, 1/8W 52154084

R79 Resistor, CF, 100K Ohm, 5% 1/8W 52154012

R8 Resistor, MF, 301 Ohm, 1%, 1/8W 54034150

R80 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R81 Resistor, CF, 47K Ohm, 5%, 1/8W 52154020

R82 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R83 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R84 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R85 Resistor, CF, 10K Ohm, 5%, 1/8W 52154036

R88 Trimpot, 10K Ohm, Linear 1409006000

R89 Resistor, MF, 60.4K Ohm, 1%, 1/8W 54035604

R9 Resistor, MF, 301 Ohm, 1%, 1/8W 54034150

R90 Resistor, MF, 20K Ohm, 1%, 1/8W 54035200

R91 Resistor, MF, 60.4K Ohm, 1%, 1/8W 54035604

R92 Resistor, MF, 20K Ohm, 1%, 1/8W 54035200

R94 Resistor, CF, 100 Ohm, 5%, 1/8W 52154084

R95 Resistor, CF, 100K Ohm, 5% 1/8W 52154012

R96 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R97 Resistor, CF, 47K Ohm, 5%, 1/8W 52154020

R98 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

R99 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028

RP1 Resistor Network, 100K Ohm X4, No Common, 1.1W 1411100302

RP10 Resistor Network, 100K Ohm X4, No Common, 1.1W 1411100302

RP11 Resistor Network, 100K Ohm X4, No Common, 1.1W 1411100302

RP12 Resistor Network, 100K Ohm X4, No Common, 1.1W 1411100302

RP14 Resistor Network, 680 Ohm X 5, No Common, 1.5W 1411680000

RP15 Resistor Network, 680 Ohm X 5, No Common, 1.5W 1411680000

RP2 Resistor Network, 22K Ohm X 9, Pin 1 Common, 1.5W 1411220201

RP3 Resistor Network, 100K Ohm X4, No Common, 1.1W 1411100302

RP5 Resistor Network, 22K Ohm X 9, Pin 1 Common, 1.5W 1411220201

RP6 Resistor Network, 10K Ohm X 4, Pin 1 Common, 0.9W 1411100204

RP7 Resistor Network, 10K Ohm X 4, Pin 1 Common, 0.9W 1411100204

RP8 Resistor Network, 22K Ohm X 9, Pin 1 Common, 1.5W 1411220201

RP9 Resistor Network, 22K Ohm X 9, Pin 1 Common, 1.5W 1411220201

S1 Switch, DIP, Low Profile 1909000200

T1 R-Core XFMR 9020653400

Reference 9027-6245-01 Drawing, Section 6

5-11

Table 5.6

U1 IC, Dual Low-noise Op-Amp, NE5532N 53295000

U10 IC, Dual Low-noise Op-Amp, NE5532N 53295000

U11 IC, Dual Low-noise Op-Amp, TLO76 1603013500

U12 IC, Dual Low-noise Op-Amp, TLO77 1603013500

U13 IC, Analog Switch, CD4053BE 46638P1

U14 IC, Analog Switch, CD4053BE 46638P1

U15 IC, Analog Switch, CD4053BE 46638P1

U16 IC, Dual Low-noise Op-Amp, TLO78 1603013500

U17 IC, Dual Low-noise Op-Amp, NE5532N 53295000

U18 IC, Audio Amp, LM386 53281000

U19 IC, Audio Amp, LM387 53281000

U2 IC, Analog Switch, CD4053BE 46638P1

U20 IC, Reference, LM833 1603083300

U21 IC, Analog Switch, CD4053BE 46638P1

U22 IC, Undervoltage Sense, MC33064P-5 1603013700

U23 IC, UCN5821A 160358210A

U24 IC, UCN5821A 160358210A

U25 IC, UCN5821A 160358210A

U27 IC, Voltage Regulator, LM317 53290000

U28 IC, EEPROM, 1024 Bit, 93C56AN NA 1603013800

U29 Assy. Software, Version 1.6 9020634816

U3 IC, Analog Switch, CD4053BE 46638P1

U30 IC, Quad 2-input NAND, 4093B 160340930B

U4 IC, Analog Switch, CD4053BE 46638P1

U5 IC, Dual Low-noise Op-Amp, TLO72 1603013500

U6 IC, Dual Low-noise Op-Amp, TLO73 1603013500

U7 IC, Dual Low-noise Op-Amp, TLO74 1603013500

U8 IC, Dual Low-noise Op-Amp, TLO75 1603013500

U9 IC, Dual Low-noise Op-Amp, NE5532N 53295000

XJ16 Jumper 2515001001

XJ17 Jumper 2515001001

XJ18 Jumper 2515001001

XJ19 Jumper 2515001001

XJ20 Jumper 2515001001

XJ24 Jumper 2515001001

XJ4 Jumper 2515001001

XJ5 Jumper 2515001001

XJ6 Jumper 2515001001

XJ7 Jumper 2515001001

XU1 IC Socket, 8-Pin 53041002

XU29 IC Socket, 40-Pin 53041308

Y1 Crystal, 4MHz, 20pF 3301000700

Reference 9027-6245-01 Drawing, Section 6

WASHER FLAT 52186006

4-40X1/4 1008402300

4-40X3/8 1008403500

5-12 CSI-200 User Instructions

PC Board Assembly, Front Panel (9030-6246-00)

Table 5.7

Ref No. Description RTS Part No.

R1-R3 Pot, 10K Ohm, Audio 1406003901

DS9 LED, Super Bright, Red 1801001900

DS1-DS8 LED, Super Bright, Yellow 1801002200

S1-S8 Keyswitch, No LED 1911004300

J1 Connector 2006009600

Reference AS6246 Drawing, Section 6

5-13

5-14 CSI-200 User Instructions

S ECTION

C

HAPTER

6

D

IAGRAMS

6-1

6-2 CSI-200 User Instructions

Date: 7/23/01 Time : 05:20:45 PM

Title: D:\TEMP\AS6246_01B.cal

Date: 7/23/01 Time : 05:27:24 PM

Title: D:\TEMP\AS6245_01D.cal

Date: 7/23/01 Time : 05:21:25 PM

Title: D:\TEMP\AS6261_01C.cal

Date: 7/23/01 Time : 05:22:16 PM

Title: D:\TEMP\AS6262_01C.cal

Date: 7/19/01 Time : 02:05:07 PM

Title: C:\home\cms\benedil\view\9020-6324_01.DWG

Date: 7/23/01 Time : 05:23:05 PM

Title: D:\TEMP\AS6464_01G.dwg

Date: 7/23/01 Time : 05:23:33 PM

Title: D:\TEMP\BD6464_01A.cal

Date: 7/23/01 Time : 05:24:13 PM

Title: D:\TEMP\IS6718_01A.cal

Date: 7/23/01 Time : 05:24:51 PM

Title: D:\TEMP\OD6355_01A.cal

Date: 7/23/01 Time : 05:25:30 PM

Title: D:\TEMP\OD6355_02A.cal

Date: 7/23/01 Time : 05:26:07 PM

Title: D:\TEMP\OD6355_03A.cal

Date: 7/23/01 Time : 05:26:42 PM

Title: D:\TEMP\OD6355_04A.cal

Date: 7/23/01 Time : 05:03:09 PM

Title: c:\home\cms\benedil\view\9000-6464_01.CAL

5

4

3

2

LOC

REV

A RELEASE TO FACTORY CK 12/7/00

DESCRIPTION

1

REVISIONS

ECO. NODRFT CHKR APP DATE

73521

FRONT PANEL

+

1
2
3

C9

C136

14

15

4

5.1M

100/25

1nF MONO

100/25

R13

22K

R16
22K

C10

R31

C1

100/25

+

.1/50

+7V

C5

C3

C4

+

5.1M

5.1M

.1/50

+14V

Q1
2N5087

R14
22K

R15
22K

R26

R29

C13

D

C

SN37A-14B

B

A

J28

M-114B

PANEL (SHT2,6D)
MIC
JACK

DYN
HEADSET

JST-B-6B-ZR

100 1/4W

CARB
MIC
CONN

J3

+7V

R22

22K

HMS/PMS

(SHT3,2D)

R

1
2
3

T

4

S

5

J2

1
2
3
4
5
6

R18

1

RB

2

TB

3
4
5

RP2I

22K

100 1/4W

R23
22K

+14V

1 10

R

T

S

1
2
3

MIC PROGRAMMING

UNBAL

BAL

929647-01-03

FB4

#73

FB2

#73

C57

+

22/50

R17

U2

4053

12
13

2
1
5

3
11
10

9

5

P1

REM MIC
MIC LO
MIC HI

(SHT2,2C)

HP L

(SHT2,2C)

HP R

UNBAL/BAL

FB3

#73

FB1

#73

+14V

C56

.1/50

+14V

X0

X1

Y0

Y1

Z0

Z1

XX

YY

ZZ

6

J1

JST-B-3B-ZR

(SHT2,1D)
(SHT2,1D)
(SHT2,1D)

J24

1
2
3

R4
100K

R5
100K

R11
620

R19
620

.1/50

167

.1/50

X

Y

Z

8

R2
2K

100

(SHT2,1D)

R20
100K

+7V

Q3
J305

R32

+

R34

22K

R1

1K

R3

R7

301
1%

R6
1K

R9

301
1%

NE5532

R27

200

R30

100K

1N914

C14
100/25

+4.5V

C2

+

10/25

PM HI

DIFF MIC PRE AMP (+20dB)

C7

6
5

NE5532

R10

3.01K
1%

+7V

CARB MIC

Q2
2N5210

D1
1N4004

R24
100K

MIC PRE/LIMITER

+14V

84

3

+

U1A

2

-

R28

22K

C15

1nF

+7V

D2

100K

D3

1N914

2N5210

+14V

Q4

C16

.1/50

R35
100K

R33
15K

1nF MONO

R8

3.01K
1%

-

U1B

1

7

+

C6
1nF MONO

(SHT3,1B)

CARBON MIC SENSE

C11

.1/50

C8

.1/50

+

1/50

(SHT2,4D)

R36
10K

C17

R21

12K

10/25

USM

+7V

R12

1K

C12

+

R38
100

(SHT3,2D)

+14V

KEY3

(SHT2,1D)

R37

10K TRIMPOT
LIN

4

(SHT3,

(SHT3,

TC3

1 7

(SHT2,6D)

SIDETONE

2D)

2D)

RP2F

22K

D4

1N914

TC1
TC2

(SHT2,7A)

PGMB

1 3

+14V

+14V

12

RP2A

22K

D15

1N914

D16

1N914

(SHT2,6B)

PGMA

(TO CH 3)

ON

OFF

929647-01-03

IFB B

(TO CH 4)

ON

OFF

929647-01-03

TC4

(SHT3,2D)

RP2B
22K

C58

.1/50

14

RP1C

RP1D

IFB A

J5

RP2C
22K

RP1B

KEY1

(SHT2,1D)

KEY2

(SHT2,1D)

J4

1
2
3

1
2
3

1 5

+14V

3 4
5 6
7 8

100K

+7V

RP3C

RP3B

RP3D

D5
1N914

RP2D
22K

R39

2K

R40
30K

3Vpp

+7V

5 6
3 4
7 8

100K

RP2E

22K

+7V

16

+14V

(SHT2,1D)

C59

100pF

470K

ORCAD GENERATED DRAWING

FILE NAME:

12
13

2
1
5

3
11
10

9

(IFB-A)

U4
4053

12
13

11
10

R41

+14V

X0

X1

Y0

Y1

Z0

Z1

XX

YY

ZZ

6

(IFB-B)

X0

X1

Y0

2

Y1

1

Z0

5

Z1

3

XX

YY

9

ZZ

6

KEY4

+14V

167

+14V

U3
4053

TALK CH.1/4W-A

X

14

PROGRAMMING

929647-01-03

LSN2

TALK CH.4

2WIRE

4WIRE

LSN1

(SHT3,7D)

4WIRE A

CALL 2

(SHT3,5D)

LISTEN
BUFFER
CH.2

(SHT2,6C)
(SHT3,7D)

LSN3

(SHT2,6C)
(SHT3,7D)

4WIRE B

PROGRAMMING

929647-01-03

(SHT3,5D)

(SHT3,1A)

TALK

Y

15

CH.2

TALK

Z

4

CH.3/
4W-B

2WIRE
4WIRE

8

167

X

14

Y

15

Z

4

8

LSN4

(SHT2,5C)
(SHT3,7D)

R42
100K

D14

1N914

Q5
2N5210

J/IC_GROUP/ECAD/SCHEMATIC/6245

3

(SHT3,5D)

J6

3
2
1

(SHT3,5D)

LISTEN BUFFER

J7

CALL 4

LISTEN
BUFFER
CH.4

VOX REC

CALL 1

LISTEN BUFFER

CALL 3

CH.3

3
2
1

7

TL072

R100

22K

7

TL072

+14V

1

TL072

+14V

CH.1

U5A

R69

22K

1

TL072

U7B

C50

100pF

U5B

R49

22K

R84

22K

+

-

C21

R65

22K

84

+

-

C31

100pF

R80

22K

U7A

R96

22K

100pF

5
6

R51

22K

+

-

100pF

3
2

84

C47

5
6

.1/50

+

-

C40

100pF

C41

3
2

R101

10K

C19
100pF

R50

10K

C28
100pF

.1/50

+7V

C37
100pF

+7V

C22

R70

10K

+7V

100pF

R85

10K

100pF

TALK
BUFFER
CH.4

100pF

C29

100pF

+7V

C48

+7V

C18

TALK
BUFFER
CH.1

R67

22K

+7V

C38

R98

22K

R53

22K

R82

22K

TL072

47K

+7V

R66

47K

TALK
BUFFER
CH.2

47K

+7V

TALK
BUFFER
CH.3

R97

47K

R52

TL072

R81

6
5

6
5

2
3

2
3

-

U8B

+

-

U6B

+

-

U6A

+

8 4

-

U8A

+

8 4

R99

22K

THESE DRAWINGS AND SPECIFICATIONS ARE THE
PRPOERTY OF TELEX COMMUINCATIONS, INC.AND
SHALL NOT BE REPRODUCED, COPIED, OR USED
FOR ANY PURPOSE WITHOUT EXPRESS WRITTEN
CONSENT.

2

CHANNEL 1

BILAT

+14V

NE5532

R58

60.4K
1%

10K TRIMPOT VM
LIN

CHANNEL 2

R74

1%

CHANNEL 3

R89

60.4K
1%

10K TRIMPOT VM
LIN

CHANNEL 4

BILAT

CHK.

20.0K

BILATCONN

20.0K

BILAT

+14V

NE5532

20.0K

NE5532

R106

20.0K
1%

R59

1%

5
6

R75

1%

R90

1%

5

+

U10B

6

-

SCALE

3
2

3
2

10pF

+

U9B

-

C52

APP.

+

U9A

-

C33

10pF

+

U10A

-

84

84

R62

20.0K
1%

1

C23

10pF

R77

20.0K
1%

7

NE5532

R92

20.0K
1%

1

C42

10pF

R108

20.0K
1%

7

60.4K

60.4K

R73

60.4K

R107

1%

R104

R61

1%

R57

R76

1%

R91

1%

R88

DR.

DATE

CK

60.4K

10K TRIMPOT VM
LIN

R105

60.4K
1%

10K TRIMPOT VM
LIN

+7V

C20

100pF

R55

22K

C32

.1/50

1

+14V

+7V

C30

100pF

R68

22K

7

TL072

+7V

C39

100pF

R83

22K

C51

.1/50

1

TL072

+14V

+7V

C49

7

60.4K

100pF

C24

.1/50

C43

.1/50

+

+

C36

+

22/50

1N4004

+

C53

22/50

47/16

D12

1N4004

Title

C25

22/50

47/16

D6

1N4004

+

47/16

D8

C44

22/50

47/16

D10

1N4004

C54

+

+

C34

+

+14V

C26

+14V

+14V

C45

+14V

D9

1N4004

R109

100

R110
100K

D13

1N4004

R63

100

R64
100K

D7

1N4004

R78

100

R79
100K

R94

100

R95
100K

D11

1N4004

C27

+

22/50

C35

+

22/50

C46

+

22/50

C55

+

22/50

NOTES: SEE SHEET 3 OF 3

SCHEMATIC DIAGRAM

J8

NC3FDH
1

2
3

J9

NC3MDH

1
2
3

J10

NC3FDH
1

2
3

COM
CH 1
CH 2

LOOP
THRU

COM
CH 3
CH 4

7/15/01

MOTHERBOARD MCE325

DO NOT SCALE DRAWING

P/N

TELETELEXX

COMMUNICATIONS, INC.

BURNSVILLE, MINNESOTA

SIZE

PLANT DIST:

D

DWG. NO.

Sheet

1

1

9027624501

of

3

B.E.

5

544332211

+14V

X0

12

X1

13

Y0

2

Y1

1

Z0

5

Z1

3

11

XX

10

YY

9

ZZ

6

+14V

167

X0

X1

Y0

Y1

Z0

Z1

XX

YY

ZZ

6

(SHT3,7D)

LSN4

(SHT1,4A)

J20

R156 20K

+

TL072

167

X

Y

Z

8

J19

929647-01-04

1
2
3
4

C137

.1/50

X

14

Y

15

Z

4

8

+7V

-

6

U16B

+

5

U13

4053

14

15

4

C84

500pF

7

C141

.1/50

X0

12

X1

13

Y0

2

Y1

1

Z0

5

Z1

3

11

XX

10

YY

9

ZZ

SPKR DIM
ADJUST
(MIN=6dB
MAX=26dB)

(R3)

+14V

167

6

RP6D

15

10K

(R1)

VOL 1

PGM

VOL

(R2)

VOL 2

(SEE SD6246)
10K AUDIO POT

3 REQD

U15
4053

X

14

Y

15

Z

4

8

RP6B

10K

RP6A

10K
RP6C

10K

MOLEX FFC
39-51-3304

12

10K

RP7B

13

10K

RP7C

14

10K

RP7D

15

10K

R157

20K TRIMPOT

LIN

13

12

14

J21

+

10/25

30
29
28
27
26
25
24
23
22
21
22

C86

+

(SHT1,6B)

USM

C87

10/25

PGM L

(6A)

MONO SW

PGM R

(6A)

+7V

C143

4.7uF

C142

4.7uF

R25

10K

+7V

R176

22K

R184

22K

10K

20K

+7V

R48

R43

20K

R170

10K

.1/50

2N5460

Q10

.1/50

R46

NE5532

R177
100K

C91

C99

C100

R185
100K

1nF

C98

.1/50

5
6

270pF

3
2

3
2

+14V

84

+

-

R47

20K

C113

+14V

C112

270pF

+14V

C92
1nF

R178

1M

84

+

-

R54

20K

84

+

U17A

-

R171

10K

C101

.1/50

U33B

7

LM833

U31A

1

LM833

1

C93

.1/50

C88

.1/50

.1/50

(SHT3,5D)

C107

4.7uF

C106

4.7uF

301

301

C102

.1/50

R172

1%

R174

1%

C108

100uF

USMB

C89

+

10/25

C90

+

10/25

4

2

U18

3

C94

618

+14V

MONO

4

2

U19

3

618

+14V

17-25VDC SOURCE

R173
100K

R175

100K

7

LM386

5

R181

C95

10/25

+

R180
1K

7

LM386

5

C103

10/25

+

R186
1K

U34

6 7

INA OUTA

5

BIAS

3

VCC

C109

1000uF

2.7

.1/50

.1/50

OUTBINB

LM4752/TO

4

C110

-4dBu NOM
(+6dBu pK)

C97

100/25

+

R182

22K

C96

C105

100/25

+

R187

2.7
R188

22K

C104

12

R44

2.7

0.1uF

R183

10

R189

10

J23

MLSS100-3

1
2
3

R45

2.7

C111

0.1uF

SPKR MUTE

REM MIC

+18V IN
4W-B LO
4W-A LO

KEY4
KEY2

HP COM

MIC LO

PM HI

(SHT1,8D)

(SHT1,8C)

REAR PANEL

P23

1
2
3

NOTES: SEE SHEET 3 OF 3

+14V IN

COM

COM
4W-B HI
4W-A HI

KEY3
KEY1

MIC HI

CHS GND

PM COM

HP L

HP R

ISO

SPKR JACK

MN-114B
1
2
3
4
5

J27

E1

E2

J22

745783-3

13
25
12
24
11
23
10
22

9

21

8

20

7

19

6

18

5

17

4

16

3

15

2

14

1

R

T
S

1 10

929647-01-04

16

RP5D
22K

R153

R154

47K

R155

47K

+7V

+7V

1
2
3
4

U14
4053

12
13

2
1
5

3
11
10

9

15

R152

200

C83

10/25

+7V

C61

D D

4W-A LO

(1D)

4 WIRE A IN

0dBu NOM
(-10dBu TO
+8dBu)

4W-A HI

(1D)

4W-B LO

(1D)

4 WIRE B IN

0dBu NOM
(-10dBu TO

C C

B B

A A

+8dBu)

(1D)

PROGRAM A

J14

SN37A-14B

PROGRAM B

J15

SN37A-14B

4W-B HI

(SHT1,1C)

S

T
S

R

1

RB

2

TB

3

T

4
5

R

1

RB

2

TB

3
4
5

10/25

10/25

10/25

10/25

C60

+

C62

+

C66

+

C68

+

10/25

10/25

10/25

10/25

C71

+

C73

+

C77

+

C78

+

R117

20.0K
1%

C63
100pF

R119

20.0K
1%

+7V

R124

20.0K
1%

C69
100pF

R126

20.0K
1% RP7A

+7V

R130

20.0K
1%

C74
100pF

R132

20.0K
1%

+7V

R138

20.0K
1%

C79
100pF

R140

20.0K
1%

+7V

TL072

R120

10.0K
1%

R127

10.0K
1%

TL072

R133

10.0K
1%

TL072

R141

10.0K
1%

TL072

1nF

1nF

1nF

6
5

1nF

2
3

C72

6
5

C81

2
3

-

U11B

+

C64
1nF

C67

-

U11A

+

8 4

C70
1nF

10.0K

-

U12B

+

C75
1nF

R139

10.0K 1%

-

U12A

+

8 4

C80
1nF

R118

10.0K
1%

R125

10.0K
1%

R131

1%

7

1

+14V

PGM ASSIGN
TO HDST L

PGM ASSIGN
TO HDST R

7

C65

.1/50

1

(SHT3,2D)

(SHT3,2D)

C76

.1/50

+14V

LIST3

LIST2

(SHT1,6B)

(-6dBu NOM)

RP5G
22K

(SHT1,5B)

R135

10K

R142

10K

PGMB

929647-01-03

929647-01-03

J16

ON

OFF

J17

ON

OFF

(SHT3,2D)

LIST1

(SHT3,2D)

4W-B LSN

(-6dBu NOM)

RP5C
22K

1 8

+14V

PGMA

(SHT3,2D)

(SHT3,2D)

C82

+

1/50

1
2
3

1
2
3

STC

RP5A
22K

SPKR ON

SPKR DIM

(SHT3,2D)

1 4

LIST4

+14V

RP5H
22K

(4D)

(4B)

SIDETONE

(SHT1,6A)

4W-A LSN

RP5B

22K

1 2

(1D)(SHT1,6D)

(SHT1,4B)
(SHT3,7D)

(SHT1,4C)
(SHT3,7D)

1 9

RP5F

22K

PGM L

PGM R

LSN1

(SHT1,4D)
(SHT3,7D)

RP5I
22K

1 3

TC2

(SHT3,2D)

LSN3

LSN2

(1D)(SHT1,5A)
(SHT3,2D)

TC4

+14V

17

RP5E
22K

160K

PGM ASSIGN
TO SPEAKER

929647-01-03

J18

1
2
3

R56

0

Title

PAGE

2MCE325MOTHER BOARD

DWG. NO.

9027624501

REV

A

5

544332211

U23

1 16

+5V

CALL LIGHT MUX

R198

RP2H
22K

100K

10

11

1

270K

VOX IN

1 9

+14V

C85
.1/50

TL072

1 8

D D

14

15

HOT

4

10K

X

Y

Z

R208

12
13

+14V

16

768

+7V

U30C

8
9

4093

U30D

4093

1 2

0.5A SBLO

1 2

NEUTRAL

X0

X1

Y0

Y1

Z0

Z1

XX

YY

ZZ

2
3

F1

EARTH

3

12
13
2
1
5
3
11
10
9

C117

10pF

R207

-

U16A

+

8 4

U21
4053

C118

C C

B B

.1/50

C119

.01/50

MYLAR

R209
1K

AC PLUG

REAR PANEL MOUNTED

C134

.1/50

(2A)

(SHT1,4D)

LSN1

(SHT1,4C),(SHT2,5C)

LSN2

(SHT1,4B),(SHT2,6C)

LSN3

(SHT1,4B),(SHT2,5C)

LSN4 CALL CTL2

CALL CTL1
CALL CTL2

RP2G
22K

+14V

7

2
1

14

,(SHT2,5D)

(TO 2D)

(TO 2D)

C120

100pF

U30A

4093

R211

22K

R213

270K

T1

TO-10R-RT

15VA

3

15VAC

15VAC

+5V

.1/50

R199

10K

R212

270K

(SHT2,1D)

E6

C140

E7

E9

+5V

+5V

C121
10pF

+18V IN

E8

U30B

5
6

4093

R214

10K

KBL005

- +

4

17-25VDC SOURCE

D21

1N4004

CR1

1

50VRRM

4.0A

3

(SHT2,3C)
(SHT1,4D)
(SHT1,4C)
(SHT1,4C)
(SHT1,4B)

4

U28

93C56

2

LM317T

+

C138

.1/50

C125
4700/35

MONO
CALL 1
CALL 2
CALL 3
CALL 4

(2B)

DSW5

DSW7

4 3

ANALOG MID
VOLTAGE

R261
22K

+5V

+5V

+5V

O I

1

S

2

C

- +

5 8

SOURCE

D20 1N4004

HEATSINK

3

INAOUT

R262

C126
.1/500

+7V

U26

C139

U29

3

28
27
26
25
24
23
22
21

29
30
31
32
33
34
35
36

37

2

NE5532

2

1

3.01K
1%

40

VPP

VDD

PC0
PC1
PC2
PC3
PC4
PC5
PC6
PC7

PD0/RDI
PD1/TDO
PD2/MISO
PD3/MOSI
PD4/SCK
PD5/SS
TCMP
PD7

TCAP
IRQ

VSS

20

2 1

7

U17B

(SHT1,1D)

+14V IN

1N4004

R263
301
1%

+

C127
10/25

.1/50

OSC1

OSC2

PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7

PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7

RESET

U22
MC33064

IN RSET

-

6

+

5

D22

39

38
11

10
9
8
7
6
5
4

12
13
14
15
16
17
18
19

1

MC68HC7058

GND

3

+

C128
10/25

GND TP

R264
220K

R265
220K

+14V

4.00MHz

+

SOURCE

.1/50

+5V

C129
100/25

C130

Y1

R215

100K

C122

.1/50

LM317T

3

INAOUT

R266

U27

R200

2.2M

1 2

R268

200

2

R267

1

909
1%

301

1%

+

C131

10/25

C132

.1/50

C115

10pF

C116
10pF

+5V

C135

22/50

R201

3.01K

RP10B 100K

RP10A 100K

RP10C

RP10D

RP11D 100K

RP11C 100K

RP11B 100K

RP11A

RP12A 100K
RP12B 100K
RP12C 100K
RP12D 100K

+4.5V

(TO ELECTRET PANEL

MIC VIA NETWORK)

+

C133

100/25

+

1%

1 2

7 8

5 6

3 4

1 2

1 2
3 4
5 6
7 8

SOURCE

34
56

100K

100K

78

100K

19

SOURCE

+5V

(TO DIGITAL IC'S)

CLK D0

2

DI

6

STR

7

EN

5

DO

3

.

8

GND

UCN5821A

U24

1 16

CLK D0

2

DI

6

STR

7

EN

5

DO

3

.

8

GND

UCN5821A

U25

1 16

CLK D0

2

DI

6

STR

7

EN

5

DO

3

.

8

GND

UCN5821A

RP8A

12

RP9H

22K

22K

17

RP8B

13

RP9F

22K

22K

18

VCC

VCC

RP8C

14

22K

RP9G

22K

D1
D2
D3
D4
D5
D6
D7

D1
D2
D3
D4
D5
D6
D7

D1
D2
D3
D4
D5
D6
D7

VCC

12

15
14
13
12
11
10
9

4

15
14
13
12
11
10
9

4

RP8D

15

RP9A

22K

E14

+5V

RP14A 680
RP14B 680

15

RP14C 680

14

RP14D 680

13

RP14E 680

12

RP15B 680

11

RP15C 680

10

RP15D 680

9

RP15E 680

4

RP8E

16

22K

RP9B

13

22K

(7D)

+5V

+5V

22K

(5D)

(5D)

TC1
TC2
TC3
TC4
SPKR ON
HMS/PMS
STC
SPKR DIM

LIST1
LIST2
LIST3
LIST4
CALL CTL1

E15

(AUDIBLE)

1 2
3 4
5 6
7 8
9 10
3 4
5 6
7 8
9 10

RP8F

17

22K

RP9C

14

22K

DSW5
DSW7

VOX IN

RP9D

15

E16

18

22K

RP8G

22K

(SHT1,6D)
(SHT1,6D)
(SHT1,6A)
(SHT1,5A)
(SHT2,6B)

(SHT1,8B)

(SHT2,6D)

(SHT2,6B)

(SHT2,6D)

(SHT2,7C)

(SHT2,7C)

(SHT2,6B)
(7D)

(7D)

+14V

E10 E11

E12

RP8H

19

22K

RP9E

16

22K

+5V

+14V

+5V

110

110

R269
10K

E13

RP8I

22K

RP9I
22K

N.C.

+5V

+17-25VDC

39-51-3304
MOLEX FFC

1
2
3
4
5
6
7
8
9
10

39-51-3304
MOLEX FFC

11
12
13
14
15
16
17
18
19
20

OFF

VOX REC

(SHT1,4A)

J21

MIC ON
SPKR ON
PANEL MIC
CALL LIGHT
CH 4
CH 3
CH 2
CH 1
CALL RED

J21

MIC ON
SPKR ON
PANEL MIC
CALL LIGHT
CH 4
CH 3
CH 2
CH 1

REM MIC
CARB MIC
ISO
SPKR MUTE

1
2
3
4
5
6
7
8

K40-8S

16
15
14
13
12
11
10
9

ON

(SHT1,8D)

S1

FRONT
PANEL
LEDS

FRONT
PANEL
SWITCHES

(SHT2,1D)
(SHT1,7C)

(SHT2,1D)

(SHT2,1D)

A A

2. CAPACITANCE VALUES ARE SHOWN IN MICROFARADS/VOLTS.

1. ALL RESISTORS ARE CARBON FILM,1/8W,5%.

NOTES: UNLESS OTHERWISE SPECIFIED

Title

PAGE

3MOTHER BOARD MCE325

DWG. NO.

9027624501

REV

A

Date: 7/23/01 Time : 05:19:08 PM

Title: D:\TEMP\SD6246_01A.cal