Broadcast Electronics 3000 Series User manual

L 1 September 1981
IM No. 597-0300
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BROADCAST ELECTRONICS INC .
I,

IMPORTANT INFORMATION
EQUIPMENT LOST OR DAMAGED IN TRANSIT
When delivering the equipment to you, the truck driver or c ar rier's agent will present a receipt
for your signature. Do not sign it until you have (a) inspected the containers for visible
signs of damage and (b) counted the containers and compared with the amount shown on the ship-
ping papers.
If a shortage or evidence of damage is noted, insist that notation to that effect
be made on the shipping papers before you sign them.
Furth er, after receiving the equipment, unpack it and inspect thoroughly fo r concealed damage.
If concealed damage is discovered, immediately notify the carrier, confirming the notification
in writing, and secure an inspection report. This item should be unpacked and inspected for
damage WITHIN 15 DAYS after receipt. Claims for loss or damage will not be honored without
proper
notification of inspection by the carrier.
TECHNICAL ASSISTANCE AND REPAIR SERVICE
Technical assistance is available from Broadcast Electronics by letter or prepaid telephone
or telegram.
Equipment requiring repair or overhaul sho uld be sent by common carrier, prepaid,
insured
and well protected. Do not mail equipment. We can assume no liability for inbound
damage, and necessary repairs become the obligation of the shipper. Prior arrangement is
necessary. Contact Customer Service Department for a Return Authorization.
FOR TECHNICAL ASSISTANCE
Phone [phone] Customer Service
WARRANTY ADJUSTMENT
Broadcast Electronics, Inc. warranty is included in the Terms and Conditions of Sale. In the
event of a warranty claim, replacement or
repair parts will be supplied F.O.B. factory. At
the discretion of Broadcast Electronics, the customer may be required to return the defective
part or equipment to Broadcast Electronics, Inc. F.O.B. Quincy, Illinois. Warranty replacements
of defective merchandise will
be billed to your account. This billing will be cleared by a
credit issued upon return of the defective item.
RETURN, REPAIR AND EXCHANGES
Do not return any merchandise without our written approval and Return Authorization. We will
provide special shipping
instr uctions and a code number that will assure proper ha ndl ing and
prompt issuance of credit. Please furnish complete details as to circumstances and reasons
when requesting return of merchandise. All returned merchandise must be sent freight prepaid
and properly insured by the customer.
REPLACEMENT PARTS
Replacement and Warranty Parts may be ordered from the address below. Be sure to include
equipment
model and serial number and part description and part number.
Broadcast Electronics, Inc.
4100 N. 24th St., P.O. Box 3606
Quincy, Illinois 62305
Tel: (217} 224-9600
Telex: 25-0142
Cable: BCST ELECT QUI
PROPRIETARY NOTICE
This document contains proprietary data of Broadcast Electronics, Inc. No disclosure, repro-
duction, or use of
any part thereof may be made except by prior written permission.
MODIFI CATIO NS
Broadcast Electronics, Inc. reserves the right to modify the design and specifications of the
equipment in this manual without notice. Any modifications shal l not adversely affect per-
formance of the equipment so modified.
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AUTHORIZED SERVICE CENTERS
• Equipped to serve you with Broadcast Electronics
parts and repairs-both in and out of warranty
UNITED STATES
1. Riggins Electronics 4. Radio Systems Design
3272 E. Willow St. 5131 West Chester Pike
Long Beach,
CA 90815 Edgemont, PA 19028
Ph: [phone] Ph: [phone]
States Covered:
Alaska States Covered:
Arizona Connecticut
California Maine
Hawaii Massachusetts
Nevada New Hampshire
Oregon New Jersey
Washington New York
Pennsylvania
2. Oyma Engineering Rhode Island
213 Pueblo Del Sur Vermont
Box 1697
Taos, NM 87571
5. Southeast Electronics
Ph: [phone] 1125 Rosselle St.
States Covered:
P. 0. Box 41308
Colorado Jacksonville, FL 32203
New Mexico
Ph: [phone]
Oklahoma
Texas
States Covered:
Alabama
Utah Florida
Georgia
3. TV Engineering Corporation North Carolina
580 Goddard Ave. South Carolina
Chesterfield, MO 63017 Tennessee
Ph: [phone] Virginia
States Covered:
West Virginia
Arkansas Missouri
Kansas Mississippi
Louisiana Nebr?ska
6.
7.
8.
• Regional depots reduce parts delivery time and
repair turn~around time
CANADA
Allied Broadcasting Equipment 9. Nortec West, Ltd.
635 South E. St. 325 West Fifth Avenue
Richmond,
IN 47374 Vancouver VSY 1J6,
Ph: [phone] B.C., Canada
Ph: [phone]
States Covered:
Illinois Provinces Covered:
Indiana British Columbia
Kentucky
Michigan Yukon Territory
Ohio 10. Nortec West, Ltd.
70568 Farrell Road
Electronic Industries Calgary, Alta., Canada
19 East Irving Ave, Ph: [phone]
Oshkosh,
VVI 54902
Ph: [phone] Provinces Covered:
States Covered: Alberta
Iowa Manitoba
Minnesota
NW Territory
Montana Saskatchewan
North Dakota
South Dakota 11.
J~Mar Electronics, Ltd.
Wisconsin 6 Banigan Drive
Wyoming Toronto M4H 1E9,
Midwest Telecommunications Ontario, Canada
4720MB Boston Way Ph: [phone]
Lanham (Wash., D.C.) MD 20801 Provinces Covered:
Ph: [phone] New Brunswick
States Covered: Nova Scotia
District of Columbia Ontario
Delaware Quebec
Maryland
BROADCAST ELECTRONICS INC.
4100 N. 24th ST • P 0. BOX 3606 • QUINCY. IL 62301
TELEX 250142 • CABLE: BCST ELECT QUI • PHONE [phone]

PARAGRAPH
SECTION I
1-1
1-2
1-3
1-4
SECTION
II
2-1
2-2
2-3
2-4
2-5
2-6
2-7
2-8
2-9
SECTION III
3-1
3-2
3-3
3-4
SECTION IV
4-1
4-2
4-3
4-4
4-5
4-6
4-7
4-8
4-9
4-10
4-11
4-12
4-13
4-14
4-15
4-16
4-17
4-18
4-19
4-20
4-21
4-22
4-23
4-24
TABLE OF CONTENTS
INTRODUCTION
Introduction
Genera1 Description
Equipment
Identification
Specifications
INSTALLATION
Desk Mounting
Rack Mounting
Filler Panels
Audio Output Connections
Audio Input Connections
Optional Microphone Input
Remote Control Connections
Recorder-Reproducer Remote Control
Power Connections
OPERATION
Playback
Recording
Optional Auxiliary
Cue Tones (Q-Trips)
Delay Option
THEORY OF OPERATION
PAGE NO.
1
1
1
3
5
5
5
5
5
7
7
8
8
10
10
11
12
Playback/Logic Board Circuit Description 13
Configuration 13
Program Circuitry 13
Cue Track Audio and One Kilohertz Stop Sensor 14
Optional Three Kilohertz Stop Sensor 14
Optional Q-Trip Sensors 15
Stop/Start Logic 15
Power Supply Board 15
Configuration 15
Voltage Supp 1ies 16
Solenoid Control 16
Fast Forward and Q-Trip Relays 16
Record Amplifier/Bias Board 17
Configurations 17
Bias Oscillator 18
Program Track Record and Bias Control Circuitry 18
Cue Circuitry Bias Control 19
Record Control and Tone Generator Board 19
Configurations 19
Record Logic Flip-Flop 20
One Kilohertz Stop Cue Generator and Control 20
Auxiliary Cue Tone Generators and Control 21
VU Meter Amp 1i fi er 22
Delay Option 22
i

PARAGRAPH
SECTION V
5-1
5-2
5-3
5-4
5-5
5-6
5-7
5-8
5-9
5-10
5-11
5-12
5-13
5-14
5-15
5-16
5-17
5-18
5-19
5-20
5-21
5-22
5-23
5-24
5-25
5-26
5-27
5-28
5-29
5-30
5-31
5-32
5-33
5-34
5-35
5-36
5-37
5-38
5-39
5-40
5-41
5-42
SECTION VI
PAGE NO.
MAINTENANCE
Routine Maintenance 23
Ex tender Board 23
Component Replacement on Printed Circuit Boards 23
Module Locations and Adjustment Points 24
Electronic Adjustments 24
General 24
Program Playback Adjustments 25
Output Level 25
Playback Equalization 25
VU Meter Calibration (Record Units Only) 25
Cue Sensitivity Adjustment 25
Program Record Adjustments 26
Bias Trap Tuning 26
Program Bias Level 26
VU Meter Calibration 27
Record Equalization 27
Cue Record Adjustments 27
Bias Trap Tuning 27
Cue Bias Level 27
Cue Tone Generator Frequency 27
Mechanical Adjustment and Maintenance 27
Mechanical System 28
Maintenance 28
Cleaning 28
Demagnetizing 28
Cartridge Maintenance 28
Mechanical Parts Replacement 29
Motor Replacement 29
Pressure Roller Replacement 30
Power Transformer Replacement 30
Tape Head Replacement 30
Solenoid Replacement 30
Solenoid Chain Replacement 31
Solenoid Plunger Adjustment 31
Tape Deck Adjustments 31
Pressure Roller Adjustment 31
Release Speed Adjustment 32
Tape Head Alignment 32
General 32
Tracking Height and Zenith 32
Azimuth 33
Stereo Phasing Test 33
PARTS LIST AND DRAWINGS
35
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SECTION I
INTRODUCTION
1-1. INTRODUCTION
This section provides equipment identification, a discussion of
equipment
features, and list equipment specifications.
1-2. GENERAL DESCRIPTION
The Series 3000 Cartridge machine is available in a wide range
of
monaural or stereophonic models to accomodate all sizes of cartridges
(see Figure 1-1). The Series 3000 is the first Broadcast Electronics Series
to incorporate
an automatic release deck. The units can be rack or desk
top
mounted. A large air damped solenoid and a rugged machined surface
ensures
trouble-free operation in continuous use.
Total
power consumption is low. An efficient hysteresis syn-
chronous drive motor
and a power conserving solenoid circuit keep total
power consumption below 45 watts. There is no excessive heat build up to
damage tape while still offering direct tape drive and optional fast
forward features.
Quality construction is standard with the Series 3000. All
components are readily available types chosen for proven dependability.
Modern integrated circuits, gold plated card edge contacts, and internally
shielded audio sections are among many features. Adjustments are accessible
and modular contruction is employed throughout.
Balanced transformer outputs are provided
on all models. Full
remote control
is provided at a rear panel receptacle. Mating connectors
are supplied
for all interconnections. Field effect transistor output
switching
is built into each machine to permit easy equipment paralleling.
The Series 3000 incorporates the Phase Lok IV head bracket which,
allows independent azimuth adjustment to assure extremely close control of
stereophonic phasing while permitting easy adjustment.
1-3.
EQUIPMENT IDENTIFICATION
The Model 3100 is available as a monaural or stereophonic play-
back unit for NAB size A cartridges. Three 3100 models can be mounted in a
single
19 inch (48.26 em) rack.
The Model 3200 is available as a playback unit or with the record/
playback option
for monaural or stereophonic operation. The 3200 accepts
both
NAB size A orB cartridges. Two units can,mount in a single 19 inch
(48.26
em) rack.
The Model 3300 is available in the same configuration as the model
3200 but accepts NAB size A, B, or C cartridges. A 3100 playback may be
mounted next to the 3300 unit in a 19 inch (48.26 em) configuration.
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The Model 3200 and 3300 machines are also available for delayed
record/playback operation. These are designed
as Models 3200 RP/DL and
3300 RP/DL respectively. These models can be operated in either a "delay"
or "normal"
mode. The time span of the delay is determined by the length
of the tape
on the cartridge. This can vary from six seconds, for example,
to provide
ample time for editing words or comments inappropriate for broad-
cast on telephone talk shows; or up to 3D-minutes on C-size cartridges for
delayed rebroadcast of network programs.
Both secondary 150 Hz and tertiary 8 kHz cue tone circuitry is
available in record or playback only models. The secondary cue tone in-
stalled in units equipped with fast forward provides automatic fast cueing
at the end of a message. The fast forward option is available in all models.
Alternate tape speeds
and line voltages and frequency standards are also
available. In record models, a provision for microphone input is available.
1-4. SPECIFICATIONS
The following list provides electrical and physical specifications
for the 3000 series audio cartridge machines.
PARAMETER
Tape Speed:
Fast-Forward {optional):
AC Power Requirements:
Noise (Reproducer):
Monophonic:
Stereophonic:
Distortion:
Equalization:
Frequency Response:
3
SPECIFICATIONS
7.5 in/s (19.05 cm/s) ±0.1%
22.5 in/s (57 cm/s)
105 to 125 V/210 to 230 V; 50 or 60 Hz
45 to 50 W maximum
62 dB or better below reference of
400 Hz at 3% THD; 54 dB below 160 n
Wb/m at 1 kHz.
60 dB or better below reference of
400 Hz at 3% THD; 52 dB below 160 n
Wb/m at 1 kHz.
2% or less record to playback at 160 n
Wb/m at 1 kHz.
NAB, IEC, CCIR as specified.
±2 dB from 50 Hz to 15 kHz exclusive
of
head contour effect.

PARAMETER
Crosstalk (magnetic head limited):
Input Impedance (Recorder):
Microphone (optional):
Line:
Input Levels:
Microphone (optional):
Line:
Audio Output:
Peak Output Level:
Cue Signals:
Ambient Operating Temperature:
Bias
Oscillator Frequency:
Dimensions:
3100:
3200:
4
SPECIFICATIONS
Cue Channel to program channel,
monophonic
150 Hz: -50 dB or better
1000 Hz: -55 dB or better
8000 Hz: -50 dB or better
Stereo, crosstalk between program
channels; better than 50 dB, 50 Hz
to 15 kHz.
150 Ohms (transformer) balanced
floating.
50 k Ohms (transformer) balanced
floating.
-70 to -24 dBm
-24 to +20 dBm (50 mV to 7.7 V).
Maximum adjustable level +8 dBm from
160 n Wb/m at 1 kHz: 600 Ohms
(transformer) balanced.
+20 dBm before clipping.
Relay contact closure for external
contra1
(150 Hz, 8 kHz). Externa1
cue/input/output available at remote
control
for other control functions.
0° to 55° C (32° to 132° F).
100 kHz
5.25 inches H, 5.875 inches W, 15.5
inches D (13.3 X 14.9 X 39.4
em)
5.25 inches H, 8.75 inches W, 15.5
inches D (13.3 X 29.8 X 39.4
em)

SECTION II
INSTALLATION
2-1. DESK MOUNTING
To Desk Mount, install four rubber feet into the holes in
the bottom cover of the
unit. Awrap-around housing mounts into holes
in the sides of the chassis.
2-2. RACK MOUNTING
To Rack Mount, remove the top and bottom covers and install
any filler panels in the front of the adapter shelf. Mount the adapter
shelf in the rack opening from the front, securing the shelf with No. 10
screws driven from the front through the trim spacers and the rack shelf
into the rack rail. Place the units into the adapter shelf from the front
and secure with the captive fasteners installed at the rear of the shelf.
2-3. FILLER PANELS
Filler Panels are available in 1/3 and 1/2 rack widths. Mounting
is accomplished by sliding the fill panel into place in the rack chassis and
securing it in place from below with the flat head screws supplied.
2-4.
AUDIO OUTPUT CONNECTIONS
The playback
driving a
600 Ohm load.
P4 provides easy access
audio output
The nominal
to the audio
is balanced with a low impedance for
output level of the playback is +8 dBm.
(see Figure 2-1).
For Monaural playback connect channel A program line to terminals
3
and 5 of output jack J4. For Stereo operation connect channel B program
line to terminals 4 and 6 of J4.
To ground the shields of the output cables at the cartridge unit
tie the external shields to pins 1 and 2 of output jack J4. If the output
shields are to be grounded at the console, no connection to pins 1 or 2
should
be made.
2-5. AUDIO INPUT CONNECTIONS
Audio Input to the Record Amplifier is by means of Input Jack J4
(see Figure 2-1). The input is high (50k Ohms) impedance bridging for
signals from -24 to +20 dBm (50 mV to 7.7 V) level. Channel A input is by
means of contacts 3 (high), and 5 (low) of J7. For Stereo, use contacts 4
(high)
and 6 (low) for channel 8 input.
5