Continental Electronics 212P-2 User manual

r
TYPE 212P-2/212P-1
III
AUDIO CONSOLES
111
INSTRUCTION MANUAL
80*1432
t / f t p h t /j f m f ! *> r fJ umJLC-A
e. BLJCKf\UEJ=t BUi/D.
MFG. OO.
DALLAS, TEXAS 7C22T
1 OCTOBER 1980

CONTINENTAL ELECTRONICS MFG . CO.
P.O. BOX 270879
DALLAS , TEXAS 75227
214/ 81-7161
Telephone :
Telex: 7 - 98
t
FOR 24 HOUR PROFESSIONAL SERVICE
214/ 27-45 2 FOR PARTS
214/ 27-45 FOR SERVICE
CALL:
CALL:

?1 2P — 1/2
table of contents /
Page
1-1
Section 1 General Description
1-1
Introduction ..............
Equipment Purpose ----
Physical Description .
Functional Description
1.1
1-7
1.2 1-7
1.
1-7
1.4
2-1
Section 2 Installation
2-1
Unpacking and Inspection .........................
Installation Procedure ........................... .
General ................................................ .
Input Connections ............................... .
Wiring Methods ....................................
Grounding .............................................
Power Supply Installation .................
Phasing of Audio Circuits .................
High Level Input Connections ............
Connection of Monaural Sources .........
Microphone and Muting Connections ...
Warning Light Connections .................
Loudspeaker Connections .....................
Program Line Connections ...................
Air Monitor Connections .....................
Machine Control Interface Connections
Special Circuit Connections ...................
Special Microphone Effects ...............
Use of Auxiliary Inputs and Outputs .
Monaural Output ..................................
2.1 2-1
2.2
2-1
2.2.1
2.2.2
2.2.
2.2.4
2.2.5
2.2.6
2.2.7
2.2.8
2.2.9
2.2.10
2.2.11
2.2.12
2.2.1
2.2.14
2-1
2-
2-4
2-4
2-4
2-5
2-8
2-10
2-1
2-14
2-15
t
2-17
2-17
2-20
2. 2-20
2. .1
2. .2
2. .
2-20
2-22
Section Operation
-1
Control Functions .........................................................
Mixers .......................................................................
Input Selector Switches .........................................
Monitor and Headphone Lever Controls ...................
Monitor and Headphone Assignment Switches ...........
Channel 7B and Channel 8B Input Selectors ...........
Operating Procedures ....................................................
Routine Operation ....................................................
Local Program on the Air .................................
Cueing Turntables or Other Material ..............
Removal of Program Material From the Air ___
.1
-1
.1.1
.1.2
.1.
.1.4
.1.5
-1
-1
-1
-1
-2
.2
-2
.2.1
.2.1.1
.2.1.2
.2.1.
-2
-2
-2
-2
iii

21 2P-1/2
table of contents (cont)
I
#
Page
4-1
Section 4 Principles of Operation
4-1
General ...................................................
Mixer Circuits .......................................
Program Circuits ....................................
General ............................................
Mixer Amplifier ...............................
Program Output Amplifier ...............
Power Supply ....................................
Monitor Circuits ....................................
General ............................................
Monitor/Headphone Function Selector
Monitor Output Amplifier ...............
Headphone Output Amplifier ............
Cue Amplifier/Regulator .................
Power Supply ....................................
Cueing Circuits ......................................
General ............................................
Cue Amplifier ..................................
Cue Amplifier/Regulator .................
Microphone Amplifier .............................
Power Supply ...........................................
Machine Control Interface .....................
4.1
4-1
4.2 4-7
4.
4-7
4. .1
4. .2
4. .
4. .4
4-7
4-9
4-9
4-9
4.4 4-9
4.4.1
4.4.2
4.4.
4.4.4
4.4.5
4.4.6
4-1
4-1
4-14
4-14
4-14
4-15
4.5
4-15
4.5.1
4.5.2
4.5.
4-15
4-15
4-17
4.6
4-17
4.7
4-18
4.8
5-1
Section 5 Maintenance
Periodic Inspections and Preventive Maintenance
Attenuators ...................................................
Wiring ............................................................
Replacement of Switches ......................................
Input Selector Switches ...............................
Channel 7B and 8B Selector Switches ..........
Channel Control Switches .............................
Replacement of Attenuator ..................................
Removal of Amplifier Modules . .............................
Microphone Preamp and Mixer Amplifier .......
Output Amplifier . . .........................................
Extender Card Installation .................................
Output Amplifier Gain Settings ..........................
Section 6 Parts List ..........................................................
5-1
5.1
5.1.1
5.1.2
5-1
5-1
5.2 5-1
5.2.1
5.2.2
5.2.
5-1
5-1
5-2
5.
5-2
5.4
5-2
5.4.1
5.4.2
5-2
5-2
5.5
5-4
5.6 5-4
6-1
6.1
General
6-1
Section 7 Diagrams 7-1
7.1
Introduction
7-1
iv

2.1 2P-1/2
li t of illu tration '
t
Figure
Page
1-2
1-1
212P-1 Monaural Audio Console ..................................
212P-2 Stereophonic Audio Console ............................
Interior View 212P-2 Stereophonic Console ..............
Power Supply ...............................................................
Machine Control Interface .........................................
Outline Drawing ..........................................................
Wire Preparation .........................................................
Attenuator Network .....................................................
Dividing Network .........................................................
Input Connections for Channels 7B & 8B ...................
Microphone Connections ..............................................
Muting Connections for Multiple Microphones ..........
External Microphone Mixer Connections .....................
Loudspeaker Muting Connections .................................
Warning Light Relay Connections ...............................
Single Loudspeaker Connections .................................
Transformer Schematic ................................................
Multiple Loudspeaker Connections .............................
Typical Machine Control Connections ........................
Special Microphone Circuit Connections ...................
Reverb System Connections .........................................
Telephone Interface Connections Transmit Circuit ..
Telephone Interface Connections Receive Circuit ...
Monaural Combining Networks ......................................
Block Diagram 21 2P- ( ) Audio Console .....................
Simplified Schematic, Typical Input Channel 1-6 ----
Simplified Schematic, Input Channels 7&8 ................
Simplified Schematic, Program Output Circuits .......
Simplified Schematic, Monitor Output Circuits .......
Simplified
Schematic, Cue Circuits ..........................
Simplified Schematic, Microphone Preamplifier .......
Schematic Diagram Power Supply .................................
Machine Control Interface Unit .................................
Simplified Schematic, Machine Control Interface ...
Switch Rear View .........................................................
Switch Connections .....................................................
Output Module Gain Setting & Fusing Information ...
Picture of Console with Extender Card in Place ----
Microphone Preamplifier, Schematic ..........................
Mixer Amplifier, Schematic ........................................
Output Amplifier, Schematic ......................................
Cue Amplifier, Schematic ...........................................
Cue Preamplifier , Schematic ....................................
Power Supply, Schematic .......... . .................... . ..........
Headphone/Monitor Assignment Switch, Schematic ....
Input
Term Board CH 1 - 6, Shematic ........................
1-2
1-
1-4
1- 1-5
1-4
1-6
1-5
2-2
2-1
2-
2-2 2-6
2-
2-8
2-4
2-9
2-5
2-10
2-6
2-11
2-7
2-12
2-8
2-12
2-9
2-1
2-10 2-14
2-11
2-15
2-12
2-16
2-1 2-19
2-14
2-20
2-15
t
2-21
2-16
2-21
2-1 7A
2-17B
2-22
2-2
2-18
4-
4-1
4-5
4-2
4-6
4- 4-8
4-4
4-11
4-5 4-16
4-6 4-17
4-7
4-18
4-8
4-19
4-9
4-21
4-10
5-
5-1
5-
5-2
5-4
5- 5-5
5-4
7-2
7-1
7-
7-2
7-5
7-
7-7
7-4
7-9
7-5
7-10
7-6
7-11
7-7
7-12
7-8
v

2l2l > -l/2
1 i t of illu tration (cont)
i
Page
Input Term Board CH 7 - 8, Schematic .........
Channel 7B/8B Input Switch Card, Schematic
Machine Control, Schematic ..........................
Front Panel, Schematic, Sheet 1 of 2 ........
Front Panel, Schematic, Sheet 2 of 2 .........
Interconnect
Cabling & Backplane, Schematic
7-1
7-9 7-14
7-10 7-15
7-11
7-17
7-12
7-19
7-1
7-20
7-14
list of tables
Page
Table
212P-(^) Physical and Electrical Characteristics ...
Attenuator Networks .....................................................
External Connections,Channel Input Terminal Boards .
External Connections,Backplane Terminal Boards .......
1-8
1-1
2-7
2-1
2-24
2-2
2-25
2-
list of drawings
Page
Drawing
6-
Monaural Console Assy ........................
Stereo Console Assy ............................
Base Assy .............................................
Cue Amp Bd Assy ...................................
Output Amp Bd Assy .............................
Mixer Bd Assy, Channels 1 - 5 ..........
Channels 7-8 Input Select Bd Assy .
Headphone/Monitor Bd Assy .................
Channels 7B & 8B Input Switch Bd Assy
Control Panel Assy .............................
Mixer Bd Assy, Channels 6 - 8 ..........
Backplane Bd Assy ...............................
MIC Amp & Mixer Amy Bd Assy ..............
Channel 1 Input Switch Bd Assy .........
Attenuator Assy ...................................
Channel Input Bd Assy ........................
Channels 7 & 8 Input Terminal Bd Assy
Power Supply Assy ...............................
Card Extender Assy .............................
Cue Preamp Bd Assy .............................
Machine Control Assy ..........................
Machine Control Bd Assy .....................
622- 646
622- 647
6 6-5571
6 6-5576
6 6-5579
6 6-5582
6 6-5585
6 6-5588
6 6-5591
6 6-5594
6 6-5602
6 6-5610
6 6-561
6 6-5625
6 6-56 2
6 6-56 9
6 6-5642
6 6-565
6 6-566
6 6-5668
6 6-5274
6 6-5278
6-7
6-11
6-15
6-19
6-2
6-27
6-29
6- 1
6-
6-41
6-45
6-47
6-51
6-5
6-55
6-57
6-59
6-6
6-65
6-67
6-69
vi

212P-1/2
ection 1
general de cription
SECTION 1
1.1
introduction
This instruction book contains all information necessary to install,
operate, maintain, and service both the 212P-1 Monaural Audio Console
and the 212P-2 Stereo Audio Console. Figure 1-1 depicts the external
configuration of the Monaural Console; figure 1-2 shows the stereo con 
sole; figure 1- shows the internal make-up of the 212P-2 Stereo Audio
Console; figure 1-4 is the console power supply; and figure 1-5 shows
the optional machine control interface assembly. The sections of this
instruction book provide the following classes of information for each
of these types of audio console.
a. Section 1, GENERAL DESCRIPTION, provides a description of the equip 
ment, identifies the major components, lists physical and electrical
characteristics , and describes the options.
b. Section 2, INSTALLATION, provides information relative to incoming
inspection, input/output connections, initial adjustments, and wiring
instructions .
Section , OPERATION, identifies and describes the functions of panel
and component mounted controls and indicators, and provides informa 
tion necessary to set up and operate the console.
Section 4, PRINCIPLES OF OPERATION, provides descriptions of funcion-
al circuits within the console, beginning with a general discussion
of the overall operation of the console and proceeding to a descrip 
tion of the function and operation of each circuit board.
Section 5, MAINTENANCE, describes procedures for preventive and
corrective maintenance, with suggested performance schedules.
Section 6, PARTS LIST, provides information for ordering replacement
components and assemblies, and parts location illustrations for each
major assembly and each circuit board.
Section 7, DIAGRAMS, contains schematic and wiring diagrams required
for console maintenance.
c.
t
d.
e.
f.
g-
t
1-1
WARNING: DISCONNECT PRIMARY POWER BEFORE SERVICING.

0^

212P-1/2
general de cription
4
it Mi
# ;
*
Figure 1-2. 212P-2 Stereophonic Audio Con ole.
1-3
WARNING: DISCONNECT PRIMARY POWER BEFORE SERVICING.

212P-1/2
general de cription
t-
it
•'•■ "I
.• -J
III
■: :l l
tih { A
:- V
:!
:
HR
| pp ; s^i
imm
| E l MD£
Interior view 212P-2 Stereophonic Con ole.
Figure 1-3.
i
1-4
DISCONNECT PRIMARY POWER BEFORE SERVICING.
WARNING: