federal signal corporation electrical products division · 2019-08-26 · federal signal...

FEDERAL SIGNAL CORPORATIONElectrical Products Division

MODEL 300VSC-1,MODEL 300VSC-1044SB,

and Model 300VSC-1044-1SelecTone® Command

INSTALLATION AND SERVICE INSTRUCTIONS

2561044ERev. E 12/98Printed in U.S.A.

LIMITED WARRANTYThe Signal Division, Federal Signal Corporation (Federal), warrants each newproduct to be free from defects in material and workmanship, under normal useand service, for a period of two years on parts replacement and one year on laborfrom the date of delivery to the first user-purchaser.

During this warranty period, the obligation of Federal is limited to repairing orreplacing, as Federal may elect, any part or parts of such product which afterexamination by Federal discloses to be defective in material and/or workmanship.

Federal will provide warranty for any unit which is delivered, transported prepaid, to the Federal factory or designated authorized warranty service centerfor examination and such examination reveals a defect in material and/or workmanship.

This warranty does not cover travel expenses, the cost of specialized equipmentfor gaining access to the product, or labor charges for removal and re-installationof the product. Lamps, flash tubes, or batteries are not covered under warranty.

This warranty does not extend to any unit which has been subjected to abuse,misuse, improper installation or which has been inadequately maintained, nor tounits which have problems relating to service or modification at any facility otherthan the Federal factory or authorized warranty service centers.

THERE ARE NO OTHER WARRANTIES, EXPRESSED OR IMPLIED,INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NOEVENT SHALL FEDERAL BE LIABLE FOR ANY LOSS OF PROFITS OR ANYINDIRECT OR CONSEQUENTIAL DAMAGES ARISING OUT OF ANY SUCHDEFECT IN MATERIAL OR WORKMANSHIP.

FEDERAL SIGNAL CORPORATIONElectrical Products Division

i

Paragraph Page

SECTION I - GENERAL DESCRIPTION

1-1 General 1-11-2 Chassis Description 1-11-3 Control Circuitry 1-21-4 Power 1-21-5 Audio Inputs 1-2

SECTION II - SPECIFICATIONS

2-1 Power Input 2-12-2 Emergency Power Source Input 2-12-3 Audio Input 2-12-4 Audio Outputs 2-12-5 Internal Speaker 2-22-6 Remote Tone Activation Circuit 2-22-7 Remote Mic. Activation Circuit (PTT) 2-22-8 Relay Contact Closure Outputs 2-22-9 Fuse 2-22-10 UL Listed 2-22-11 CSA Certified 2-22-12 Physical 2-2

SECTION III - INSTALLATION

3-1 Signal Lines 3-13-2 Model 300VSC Signal Connections 3-13-3 Connection to Remote Devices 3-23-4 Power Connections 3-23-5 Connections to Remote Switches 3-43-6 Tone Module Installation 3-4

SECTION IV - CIRCUIT DESCRIPTION

4-1 General 4-14-2 Tone Control Circuits 4-1

SECTION V - SERVICE

5-1 General 5-15-2 Replacement Parts 5-1

TABLE OF CONTENTS

1-1

1-1. GENERAL.

The Model 300VSC SelecTone® Command (figure 1-1) is aUL listed and CSA certified central control device that iscapable of generating up to four different tone signals on aline that is connected to remote speaker/amplifiers in aSelecTone System. The 300VSC can control signal lines toFederal Signal Models 300GC, 300GCX, 300X, 302GC,302GCX, 302X, and 50GC speaker/amplifiers and to otherdevices designed to operate with a SelecTone system. It canalso control signals to speakers designed for 25Vrms lineoperation. The 300VSC has a public address (PA) function so voice messages or instructions can be announced over theSelecTone system through an optional Model MSB-1 orMNC-1 Microphone. The unit can also be used to play background music generated from an external source over the SelecTone system.

The Model MNC-1 microphone is a hand held, noise cancelingmicrophone that is ideal for use as a local microphone. TheModel MSB-1 microphone (figure 1-2) is a base station typemicrophone designed for desk-top operation.

The Model 300VSC-1 may be installed, in indoor installationsonly, on a desk-top.

A. The Model 300VSC-1044SB and 300VSC-1044-1 are arack mountable unit complete with mounting hardware.The 300VSC-1044 will fit any standard 19" rack mount cabinet.

The Model 300VSC can be used for a variety of prioritizedsignaling purposes, such as playing background music,auxiliary fire alarm, evacuation alarm, start and dismissal,paging, and other emergency warning applications. The system can be automated if external devices such as heatdetectors, switches or program clocks are connected to theremote control inputs. Additional advantages of the Model300VSC include economical system expansion along withlong term system flexibility.

The Model 300VSC generates and amplifies tone and audiosignals and applies them through signal lines to the remoteSelecTone devices in the system. A Model 300CK ConnectorKit is required in each Selectone device to connect theSelectone devices to the signal line. Speakers designed for 25 volt operation can connect directly to the 25 volt output.The 300VSC has provisions for up to four SelecTone tonemodules of the user’s choice. The tones are designated as

Tone #1, Tone #2, Tone #3, and Tone #4. Each tone can bemanually activated locally by its associated push buttonswitch on the front panel or by a contact closure at the associated remote control input. Whenever a tone is activated, either locally or remotely, its associated front panel push button LED illuminates to indicate that the tonehas been activated. The LED remains lit until the tone isdeactivated and the contact closure is removed. All 300VSCcontrols are located on the front panel.

1-2. CHASSIS DESCRIPTION.

The Model 300VSC-1 is assembled in a black brushed aluminum 2- piece housing approximately 10.5" wide by9.5" deep by 2.44" high. It is intended to be placed on anyflat horizontal surface, or it can be wall mounted using thewall mounting brackets supplied in the accessory kit. Thehousing is held together with four screws, two on the bottomnear the front and two at the back near the terminal blocks.

B. The Model 300VSC-1044SB and 300VSC-1044-1 areassembled in a 3 piece aluminum housing. The housingis 3.5"H x 17.5"W x 10.5"D. The 300VSC-1044 is painted black. This unit is intended to be mounted in a standard 19" rack mount cabinet.

The switch printed circuit board is attached to the upperhousing with four screws. A wiring assembly connects the

SECTION IGENERAL DESCRIPTION

Figure 1-1. Model 300VSC-1 SelecTone® Command

Figure 1-2. Model MSB-1 Microphone.

Figure 1-3. Model 300VSC-1044SB and 300VSC-1044-1SelecTone® Command.

1-2

switch board to the main printed circuit board. The mainprinted circuit board is attached to the lower housing witheight screws. The front panel switches are designated asTONE 1 through TONE 4, AUX, TEST and CANCEL.The tone corresponding to each switch can be labeled in the white area next to the switch with a permanent felt-tipmarker. In the event a tone or message changes, the markingcan be removed by lightly rubbing with a rag dampened withdenatured alcohol. Ensure the denatured alcohol does notcome in contact with the switches as this could result in theirbeing damaged.

1-3. CONTROL CIRCUITRY.

A. Control Cicruitry.

The control circuitry in the 300VSC has a built-in prioritylevel feature. If a given tone is already sounding whenhigher priority tone is locally or remotely activated,the higher priority tone automatically overrides the lowerpriority tone. However, the push button LED for the lowerpriority tone remains lit to indicate that the lower prioritytone remains activated. When the higher priority tone isdeactivated, the LED in its push button goes out and thelower priority tone resumes sounding. Pressing cancel will deactivate any currently active tones. The local microphone has the highest priority. All of the tones havepriority by number sequence and all have priority overremote PA and background music.

Since Tone #1 has priority over all other tones, the “Slow Whoop” (TM9) tone module is frequentlyinstalled in the Tone #1 position as a “Fire” signal.Whenever the 300VSC is activated, and is not in the test mode, a built-in relay causes a set of normally closedcontacts to open and normally open contacts to close,which makes it possible to send an alarm signal to otheremergency services or circuits. Check with local codesfor specific requirements regarding types tones to use.

B. “TEST” Pushbutton.

The “TEST” pushbutton switch permits the testing oftones without activating the remote SelecTone devices.While a test is being conducted, the tone under test isheard from the monitor speaker inside the enclosure only.The “TEST” switch also cancels false alarms. Wheneverthis pushbutton is pressed, the LED remains illuminatedto remind the operator to press the reset button after thetest is complete or the false alarm is corrected.

C. “CANCEL” Pushbutton.

The “CANCEL” pushbutton when pressed will reset all the manually activated signaling functions of the300VSC. It also provides a momentary dry contact closure to facilitate remote resetting of any other alarm circuit. The contact stays closed as long as the “CANCEL” pushbutton is depressed. Resetting of remoteactivation will not occur if the closure occurring at theremote input has not been removed.

1-4. POWER.

WARNINGIn order to prevent power to the 300VSC from being turned

off accidentally, the unit does not have a power switch. Before performing any installation or maintenance,

ensure that power is disconnected.

The front panel has a green LED to indicate the presence of primary power. The 300VSC can be operated from either a120VAC or a 24VDC power source. The AC power is connected via the power cord, and the 120 volt operationmust be manually switched internally while 24VDC connects via the rear terminals.

1-5. AUDIO INPUTS.

A microphone can be connected directly to the 300VSC viamodular jacks provided in front of the unit (highest priority).However, there are screw terminal provisions for a low level,low impedance audio signal to be input in the back of theunit, which allows audio to be coupled from a telephone system (PBX) with the proper interface equipment suppliedby the phone company. This input is designed to also allowthe direct connection of a low impedance remote microphonewith separate PTT (priority below the tones). An RCA jack isprovided in the back of the unit to couple standard 1 voltaudio signal from a background music source such as a radioreceiver, CD player or a tape player.

2-1

2-1. POWER INPUT.

A. Input Voltage 120V,50-60HZ

B. Standby Current 50MA 120VAC

C. Operating Current 210MA(MAX)

D. Power Consumption 26 Watts(MAX)

2-2. EMERGENCY POWER SOURCE INPUT.

A. Input Voltage 22-32 VDC

B. Standby Current 90MA

C. Operating Current 760MA

2-3. AUDIO INPUT.

A. Local PA (Use optional Model MSB-1 microphone)Input Impedance 5k OhmsInput Voltage 16MVrms (MAX)

B. Remote Mic.Input Impedance 5k OhmsInput Voltage 16MVrms (MAX)

C. Aux. InputInput Impedance 5k OhmsInput Voltage 500MVrms (MAX)

2-4. AUDIO OUTPUTS.

A. Output ImpedanceUnbalanced Sig. line 25 Ohms (MAX)Unbalanced Sig. Line Standby 120 OhmsBalanced Sig Line 40 Ohms (MAX) Low Level Sig. Out 600 ohms

B. Output Voltage Levels No Load (<3% THD)Unbalanced Sig. Line 9VrmsBalanced Sig. Line 17VrmsLow Level Sig. Out 1Vp-p

C. Output Voltage Levels Max Load (<3% THD)Unbalanced Sig. Line 8Vrms(25 Ohm load)Balanced Sig. Line 15Vrms(40 Ohm load)Low Level Sig. Line 1Vp-p (600 Ohm load)

D. Tone Output Levels No Load (sq. wave)Unbalanced Sig. Line 12VrmsBalanced Sig. Line 25VrmsLow Level Sig. Line 1Vp-p

E. Tone Output Levels Max Load (sq. wave)Unbalanced Sig. Line 12Vrms (25 Ohm load)Balanced Sig. Line 20Vrms (40 Ohm load)Low Level Sig. Line 0.56Vrms (600 Ohm load)

F. Audio Frequency Response Balanced Sig. Line40 Ohms max load, From 250Hz to 80KHz(Reference 1KHz) -3db40 Ohm max load, From 450Hz to 60KHz(Reference 1KHz) -1dbNo load, From 100Hz to 90KHz(Reference 1KHz) -3dbNo load, From 200Hz to 60KHz(Reference 1KHz) -1db

SECTION IISPECIFICATIONS

2-2

G. Signal To Noise Ratio (<3% THD)Local PA 60dbRemote Mic 40dbAux Input 80db

H. Audio Distortion From Aux Input to Balanced Sig.Line Output (40 Ohm load) 2%

2-5. INTERNAL SPEAKER.

Sound Level At 1 Meter 65db

2-6. REMOTE TONE ACTIVATION CIRCUIT.

Type Dry Contact ClosureLine Impedance 100 Ohms (MAX)Circuit Current 50MA Max (12VDC)

2-7. REMOTE MIC. ACTIVATION CIRCUIT (PTT).

Type Dry Contact ClosureLine Impedance 100 Ohm (MAX)Circuit Current 10MA Max (12VDC)

2-8. RELAY CONTACT CLOSURE OUTPUTS.

Tone 1, Tone 2, Tone 3, Tone 4, Sig. Out, Aux., Test and Cancel RelaysType Dry Contact ClosureRating 24VDC, 1A, Resistive

2-9. FUSE.

F1 Type GMC-1 1A, 250VF2 Type GMC-1/2 1/2A, 250V

2-10. UL LISTED.

File E61713Standard UL 813 Commercial

Audio Equipment

2-11. CSA CERTIFIED.

2-12. PHYSICAL.

A. 300VSC-1Weight 4 1/8 lb. (1.88 kg.)Dimensions (HWD) 2.44" x 10.5" x 9.25"

B. 300VSC-1044Weight 6 lb, 5.8 oz. (3.08 kg)Dimensions (HWD) 3.5" x 17.5" x 10.5"

3-1

WARNINGFailure to follow all safety precautions and instructions may

result in property damage, serious injury, or death to you or others.

SAFETY MESSAGE TO INSTALLERS

Peoples lives depend on your safe installation of our products.It is important to follow all instructions shipped with the products. This device is to be installed by a trained electricianwho is thoroughly familiar with the National Electric Code andwill follow the NEC guidelines as well as local codes.

The selection of the mounting location for the device, its controls and routing of the wiring is to be accomplished underthe direction of the Facilities Engineer and the Safety Engineer.In addition, listed below are some other important safetyinstructions and precautions you should follow:

• Read and understand all instructions before installing oroperating this equipment.

• Do not connect this unit to the system when power is on.

• All effective warning speakers produce loud soundswhich may cause , in certain situations, permanent hearing loss. You should take appropriate precautionssuch as wearing hearing protection.

• After installation, test the sound system to ensure proper operation.

• Show these instructions to your Safety Engineer and then file them in a safe place and refer to them whenmaintaining and/or reinstalling the unit.

• Establish a procedure to routinely check the sound system for proper activation and operation.

• Consult the authority having jurisdiction in your arearegarding the proper use and installation of this product.

3-1. SIGNAL LINES.

A. The signal lines transfer the tone signals and verbal messages from the 300VSC to the remote SelecTonedevices. In order to reduce the possibility of cross talk,hum and static noise pick up, the signal lines must betwisted pair, shielded audio cable. In the majority of systems use AWG 18 shielded twisted pair audio cables.

CAUTIONIf too small a diameter cable is used, unacceptable signal voltage drop in the signal line will cause reduced sound output from the remote signal device. Only use a cable

having wire diameter greater than 22AWG.

B. Federal does not recommend that new or existing telephone lines be used as signal lines in a SelecTonesystem for the following reasons:

1. Interference from other services or systems, or interference from the system to other services.

2. Cross talk, interference or hum induced by other telephone lines.

3. Extended downtime because of the second partyinvolvement required to service the lines.

4. The additional cost of installation, interfacing devicesand monthly charges as opposed to a one-time cost ofperforming the installation.

3-2. MODEL 300VSC SIGNAL CONNECTIONS.

CAUTIONCrosstalk can occur between signal lines and power lines,

causing confusing messages, which interfere with the emergency warning capability of this equipment.

Do not install signal lines in the same conduit with power lines.Avoid routing signal lines on cable trays with high voltage

power lines.

To connect the signal lines of the SelecTone system to the300VSC, connect a color coded shielded twisted pair ofaudio cables having conductors no smaller than 18 AWG toSIG. HI (TB1-2) and COM (TB1-1) terminals on TB1 (seefigure 3-1). Every remote SelecTone signaling device in thesystem will be connected in parallel to these lines. Whenconnecting the remote devices in parallel to the signal lines,observe the correct polarity and install wire nuts over the connections.

3-3. CONNECTION TO REMOTE DEVICES.

Physically install the remote SelecTone device(s); follow theinstallation instructions packed with the device.

A. 300GC, 300GCX, 300X, 302GC, 302GCX,302X and 50GC.

A 300CK Printed Circuit Connector Board is required toconnect a 300GC, 300GCX, 300X, 302GC, 302GCX,302X or 50GC to the signal lines. The 300CK properlyterminates the signal lines to the amplifier in the 300GC,300GCX, 300X, 302GC, 302GCX, 302X and 50GC. As shown in the figure 3-2, connect the blue wire on the300CK to the COM. wire from the 300VSC. Connect theyellow wire on the 300CK to the SIG. HI wire from the 300VSC.

B. 25 Vrms Signal Line Application.

The 300VSC has provision for connecting 25 Vrms lineoperated speakers to its output. Connect the 25 Vrms lineat terminals TB1-4 and TB1-5 of terminal block TB1.Connect the speakers in parallel to this line using 25Vrms line tap. This output is to be used only if there is no SelecTone system devices connected across TB1-1and TB1-2. This output is not switched like SelecTonesystem output across terminal TB1-1 and TB1-2.

SECTION IIIINSTALLATION

3-2

C. Low Level Audio Output.

The 300VSC also has provision for 1 volt peak to peakaudio output that can be coupled to the audio input ofanother amplifier. This low level output is availableacross terminals TB1-1 and TB1-2. It can also be connected to an analog fiber optic transmitter so thataudio can be transmitted over a fiber optic link in anelectrically noisy environment.

3-4. POWER CONNECTIONS.

The two basic methods of supplying power to a SelecTonesystem are 120VAC 50/60HZ Local Power and 24VDCCentral Power. The following paragraphs describe eachmethod along with the advantages and disadvantages of each.

A. Local Power (see figure 3-3).

In this system, power is supplied to each remoteSelecTone device by connecting it to 120VAC supply in the immediate vicinity of the device.

CAUTIONImproper installation could render this system inoperable,interfering with the warning nature of this product. The

installation must conform to applicable local and/or National Electrical codes.

If an emergency power source is required, central powersystem as described below should be employed.

B. Central Power (See figure 3-4).

1. General.

In the central power system all of the remote amplifierpower lines are connected in parallel to one or morecentrally located power sources of either 24VAC or 24VDC.

2. Advantages of the Central Power System.

a. The entire system may be independent of localline voltage.

b. The entire system can be switched to an emergency standby power source in the event of a power failure.

c. The central power system has the added advantage that an auxiliary power supply, such asthe Federal Model PS300 can be used to powerthe remote devices in the SelecTone system. If thePS300 is used, it is not necessary to switch thepower source if a power failure occurs.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

FROM EXTERNALSWITCHING DEVICES

SHIELDED TWISTEDPAIR SIGNAL LINES

TB2

LEVEL CONTROLS

TB1

CO

M

SIG

HI

GN

D

TN

1

TN

2

TN

3

TN

4

+ 2

4VD

C

- .76

0 m

A

290A2664-01

Figure 3-1. Model 300VSC Rear View

300GC

TERMINAL BLOCK (TB1)ON REAR OF 300VSC-1

YEL BLU YEL BLU

300CK

300GC

300CK

COM SIGHI

1 2SHIELDED

TWISTED PAIRSIGNAL LINE

TO ADDITIONALSELECTONES

290A2664-02

Figure 3-2. 300CK Connections.

3-3

3. Disadvantages of Central Power System.

a. Heavy power lines are required from the powersource to the remote devices in the system. Thesize of the power lines is dependent upon thenumber of amplifiers and the total distance of thepower loop in order to minimize the voltage dropwhile a tone signal is being generated.

b. Future expansion is limited by the current capacity of the power source and the power linesthat were initially installed.

c. Central power installations must comply withlocal electrical codes. Most power circuits areClass I circuits. Therefore, conduit will probablybe required. Installation costs are higher than alocal power system.

290A2664-03

1 2 17 1 16

TB-1 TB-2

YEL

BLU

MODEL 300GC

MODEL 300VSC-1

MODEL 300CK

SIGNAL LINES SHIELDEDTWISTED PAIR

120 VAC 120 VAC

LOCAL PWR. LOCAL PWR.

POWER LINES

SIG. HI (YEL)

COM. (BLU)

120 VAC

Figure 3-3. Typical Local Power System.

290A2664-04

YEL

BLU

POWERLINES

MODEL 300GC24 VDC

MODEL 300CK

SIGNAL LINES SHIELDEDTWISTED PAIR

NOT USED WITH MODEL PS300

PS300

24 VDCPOWERSUPPLY

CKT. 1

CKT. 2

+

+

+

-

-

-

1 2 17 1 1615

TB-1 TB-2

MODEL 300VSC-1120 VAC

SIG. HI (YEL)

COM. (BLU)

Figure 3-4. Typical Central Power System.

C. 300VSC Power Connections.

DANGERInstallation with the system power on could cause serious

injury or death. Do not perform any installation or maintenanceon this system when power is on. Since the 300VSC does

not have a power switch, ensure that the power is disconnected before proceeding.

WARNINGThis device is to be installed by a trained electrician who is

thoroughly familiar with the national electrical code and local codes and will follow the guidelines.

CAUTIONCross talk, interference, or hum can be induced in signal lines,causing poor audio output or confusing messages, which inter-feres with the emergency warning capability of this equipment.Do not install power lines in the same conduit as signal lines.

3-4

Operating power is connected to 300VSC by merelyinserting the plug end of the line cord into any standard120 volt, 60 Hz outlet. The 300VSC is factory set for120VAC 50/60Hz operation.

If it is desired to use 24 VDC either as a primary or auxiliary source of power, connect the “+” terminal of 24 volt DC power supply to the terminal TB2-15 (+24 VDC) and “-” terminal of the 24 VDC power supply to the terminal TB2-16 of the TB2 terminal block located in the back of 300VSC.

3-5. CONNECTIONS TO REMOTE SWITCHES.

The 300VSC tones can be activated remotely by any normally open low current switch contacts having a currentcapacity of at least 50 ma inductive. Figure 3-5 illustrates theconnection of switch contacts to the 300VSC. S1, S2, S3 andS4 represents remote switch contacts such as those found inflow switches, program clocks, heat detectors, and smokedetectors. The remotely activated tone sounds as long as theactivating contacts remain closed.

3-6. TONE MODULE INSTALLATION.

WARNINGInstallation or maintenance on 300VSC when power is on can

result in serious injury or death. Do not perform any installationor maintenance to the system when power is on.

The 300VSC can accommodate up to four SelecTone modules of the user’s choice. To install the tone modulesinsert them into the desired receptacles on the printed circuitboard as shown in figure 3-5. The receptacles for TONE #1module and TONE #2 module are located on the motherboard. Receptacles for TONE #3 module and TONE #4 modules are located on the card that plugs into the mother board.

Figure 3-5. Model 300VSC Rear View (Cover Removed).

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 1 2

GND

TONE 1

TONE 2

TONE 3

TONE 4

3 4 5 6 7 8 9 10 11 12 13 14 15 16

TB1 TB2

300VSC-1

TONE #2

REAR VIEW(WITHOUT COVER)TONE #4

TONE #1

TONE #3

TONE MODULES

290A2664-05

OPTIONAL REMOTE SWITCHCONTACTS

(CUSTOMER SUPPLIED)

S1

S2

S3

S4

4-1

4-1. GENERAL.

The electronic circuitry in the 300VSC consists primarily of priority control circuits, tone control circuits, audio preamplifiers and a power amplifier. The unit also containsall of the necessary switching circuitry for the control of PA,remote PA and background music. All of the electronic circuitry is mounted on two printed circuit boards. The operation of the tone modules will not be described becausethey are not an integral part of the 300VSC. However,the effect of the signal(s) from the tone module(s) will bediscussed. When reading the following paragraphs, refer tothe 300VSC schematic diagram (figure 4-1) and the SwitchBoard Schematic diagram (figure 4-2).

4-2. TONE CONTROL CIRCUITS.

A. Tone Activation Circuits.

The operation of the activation circuitry of all four tonesis identical. Therefore, only the operation of the TONE#1 activation circuit will be discussed.

TONE #1 is activated by pressing local, TONE 1 pushbutton located on front panel or when remote switch contacts, connected to TB2-7 and TB2-8, are closed,energizing K5 and the output relay K2. Simultaneously,the switch contacts close the TONE 1 red LED circuitand the LED illuminates. When K5 energizes, the “A”contacts apply +12 VDC to the TONE #1 moduleinstalled in lower left tone receptacle. The tone modulethen generates TONE #1 and applies it through CR16,C35, R43, pre amp IC11A, C44, level control R51, C48,analog multiplexer IC6 pin 2, 3 and C10 to the input pin9 of the power audio amplifier IC3. After the tone isamplified, it is applied through C31 to the MonitorSpeaker and via C32 through the closed K2A contacts of relay K2 to the SIG. HI terminal TB1-2 of terminalblock TB1.

B. Priority Level Control.

The contacts of the Tone Control Relays are connected sothat TONE #1 has priority over all other tones; TONE #2has priority over TONE #3 and TONE #4, etc.

Figure 4-3 is a simplified schematic diagram of the relaytone control contact circuit. When all tone control relaysare de-energized, as shown in figure 4-3, the tone controlcontacts K5A, K3A, K7A, and K8A are connected inseries to the +12 volt source. Therefore, any one of thefour tones can be activated. However, after a given tone has been activated, no lower priority tone can be initiated. For example, TONE #2 is activated when K3 isenergized causing K3A to apply +12 VDC to the TONE#2 tone module via J7-3. As shown in figure 4-4, whenK3 applies +12 VDC to TONE #2 tone module, the circuit to K7A and K8A is open. As a result, if either K7 or K8 is energized, TONE #2 continues to sound.However, if TONE #1 is activated, K5 energizes and

K5A applies +12 VDC to TONE #1 tone module via J5-3, while opening the circuit to TONE #2 and all othertones. Consequently, TONE #1 overrides TONE #2 eventhough TONE #2 relay K3 is energized.

C. Public Address (PA) Switching.

1. Local PA.As shown in schematic diagram figure 4-1, wheneverlocal microphone, push-to-talk (PTT) switch ispressed, pin 2 of opto-isolator IC1A is groundedwhich in turn applies a low at pin 13 of IC4 invertor‘F’. This causes IC4-12 to go high. The IC4-12 pin isconnected to Priority Encoder IC5 pin 4. The PriorityEncoder, IC5 accepts highs at seven of the eight avail-able inputs and produces a three-bit parallel binarycoded output at IC5-6 (most significant bit-msb), IC5-7, and IC5-9 (Least significant bit-Lsb). The value ofbinary coded output is between 0 and 7 (000 and 111 binary). The higher the priority, thehigher the value. When more than one input to IC5 is present, the output assumes the binary code of thehighest priority input. IC5-4 is highest priority input,so when this pin goes high, the highest priority value7 (binary 111) produced by IC5 at pins 6, 7 and 9 isapplied to pins 9, 10 and 11 of Analog MultiplexerIC6. When the local microphone push-to-talk buttonis pressed, the audio signal from the microphone iscoupled to the input of the pre-amplifier IC9-A pin 2 via C3 and R26. The output of the pre-amplifierIC9A is connected to the Analog Multiplexer pin 4via C43, level control R50 and C47. When a binarycode 111 is applied to the multiplexer pins 9, 10 and11, the analog switch between pins IC6-4 and IC6-3closes and applies higher level local microphoneaudio from the IC9A pre-amplifier to the audio inputof the power amplifier IC3. The Priority Encoder IC5-15 normally stays high. However, when any oneof its seven inputs goes high, IC5-15 goes low. Thislow is applied to the base of Q3. This causes Q3 toturn on and energize the Signal Output relay K2, toapply amplified local microphone audio signal to the signal line connected at TB1-2.

When the local microphone push-to-talk switch ispressed, the high generated by invertor IC4F is alsoapplied to the base of transistor Q5 through resistorR10. This causes Q5 to turn off, thus removing the+12 VDC source to the tone circuits and giving priority to local PA over all tones.

SECTION IVCIRCUIT DESCRIPTION

LOCAL MIC

REMOTE MIC

8 BIT

PRIORITY

PRE-AMP

LOCAL

PRE-AMPREMOTE

LOCAL

RECORD

8 C

TONE 1

THRU

TONE 4

REG

9

7 8 9GND

5Vcc

42 SIGNAL

21 3 4 5 6 87

101112

101112

2

1

2

5

4

3

2

8

11

45

6

3

12

9

1112

10

876

45

3 4 5

1

2

1

3

7

6

8

3

13

2

GND

VCC

221

8

SIGNAL

4 54 5 6

12

11 10

6

9

5

3 4

1

1

1 IN

2

GND

OUT 3

9 8

5 6

2

6543

12

6

45

3

1

11

13

10

12

3 4

6

GND87 Q1

Q2D0Q0

D1

D5

543

EID7D6

21 D4

EO

D3D2

GS

12V

1 2

2

11

910

12

1413

1615

5

67

1

31

1

8 VSS

X7

765

VEEInhX5

432 X6

X

X4

1

4

5

67

8

1

23

4

5

67

8

1

23

1

8

4

6

5

3

7

2

1N4007CR15

J5TONE CARD CONNECTOR

V18ZA3VR4

10KR16

J8

1/2 AMPF2

T1

K5

V39ZA6VR1

SW DPDT

SW1

.1uF,50V

24VBT

F1

12V

2N3702Q3

12V2.2KR2

100KR7

100KR6

ILD-1J3

12V C2

C1

.1uF,50V

R4

ILD-1IC1A

12V2.2KR3

IC1B

18KR8

12V

12V

100K

100KR5

CD4066

100uF,50V

100KR51

IC7A

IN4007CR9

100KR17

12V

J6

C18

V18ZA3VR5

100KR19

R54

10KR18

100K

R3710K

100KR38

100KR53

IC7DCD4066

R5247K

CD4066IC7C

10K

R39100K

R40

CD4066IC7B

VR6V18ZA

LM7812Q1

1N5059-02,2A

CR10

12V

z

3300uF,50V

1N4007CR16

C29

330 uF,50VC26

220, 1/2WR14

K3

1N4007CR6

1N5059-02, 2ACR7

12V

1N5253BCR5

2N5296

.33uF, 50VC4

10KR15

2.2uF,50V

y

C38

MC14584BCP

MC14584BCP

MC14584BCP

IC4D

IC4C

24V

2.2uF,50V

5K,30%R58

C30

IC2

PHONE JACK

4.7KR30

J1

2.2uF,50VC24

K7

100uF,50VC20

PHONE JAC

12V

J2

12V

47KR32

47KR41

47K

R35

47K

R34

4.7KMC14584BCP

IC4E

IC4F

MC14584BCP

R918K

CD4532BEIC5

12V

MC14584BCP

IC4B

IC4A

.01uF,50VC12

12V

.01uF,50V

470KR20

10KR10

2.2uF,50VC3

C13 10KR27

2.2KR2812pF,

100V

C15

IC8BSSM-2139P

10uF,35V

C19

6vR1

SSM-2139PIC8A

2.2KR22

470KR24

12pF,100VC17

10KR29

12VC16

MC14

10K

I

R21

47KR31

R3347K

22uf,35V

1 AMP

CR181N4007

CR191N4007

CR201N4007

120/240

VAC

120VAC

240VAC

REMOTE

CHANNEL

AMP

AUX

OP-AMP

41 322GND

Vcc

4

7 8 9 1011125 6

9SIGNAL

75 8 101112

3

21

5

67

1

2

16

9C

X0

AB

X3

VDDX2X1

10

1211

1413

156

987

-IN2

+VccINV2

OUT2

45

321

INV1

-VccOUT1GND

-IN1

8

7

15

6

23

4

8

7

2

1

6

5

4

3

16

12

151413

1011

9

5

876

34

21

9

1617

151413

1112

10

2

876

45

3

1

2

7

1

8

5

6

4

3

5

6

4

3

8

1

7

2

1

8

4

6

5

3

7

2

3

TONE CARD CONNECTOR

2.2uF,50VC39

5K,30%R59

47KR36

47KR42

12V

100KR55

1N4007CR17

J7

C31

10KR45

2.2uF,50V

V18ZA3VR7

IN4007CR13

2.2uF,50VC28

100KR56 6V

IC9ALM358

22uF,35V

2.2uF,50V

8.2

1N5059-02, 2ACR12

12V

K8

6V

150KR48

LM358

K

1N4007CR2

1N4007CR1

R2310K

12V

IC9B

2.2uF,50V

R2547K

12V

R2647K

2.2uF,50V

C40

C9

C32

10uF,35VC25

5K,30%R60

J4

1 uF,50V

.1 uF,50V4051BCPIC6

C10

12V

C5

.01uF,50VC14

10uF,35VC11

100uF,50VC6

C7.02uF,25V

R13

IC3TDA1521

24V

.1uF,50VC8

330uF,50VC27

22uF,63VC33

22uF,63V

C34

47KR12

47KR11

12V

2.2uF,50V

1N5059-02,2ACR14

12V

220KR46

12V

10KR47

12V

1N5059-02, 2ACR11

C22

K4

2.2K

22uF,35VC23

680, 1/2WR49

C21

1N5059-02, 2ACR8

12V

120, 2W

R43

R5022K

R44

K2

K6

1N5059-02, 2ACR4

C37

5K,30%R57

24VBT

J11

J10

J9

T1S93 Q2

22uF,63VC35

22uF,63VC36

K1

1N5059-02, 2ACR3

12V V18ZA3VR3

V18ZA3VR2

.0022uF,100V

-24V BAT+24V BATRMT AUDIO GND

RMT AUDIO INTN4 INITTN3 INITTN2 INIT

RMT PTT

MUSIC RELTN4 REL

NOCOM

TN1 INITGND

COM

COMNO

RESET

NO

TN3 RELCOM

COMNO

NO TN2 REL

COM

COMNONC

COMNCNO

REL CONT

TN1 REL

TEST

REL CONT

SIG 1V

SIG 25SIG 25V

NO

SIG HISIG GND

SIG OUT

290A2843B

Figure 4-1. Model 300VSC Mother Board Schematic Diagram.

4-2

4-3

2. Remote PA.Remote PA operation is similar to that of local PA,except that the priority code produced by IC5 is 010(value 2). Depressing the remote PTT switch appliesa low to opto isolator IC1B pin 3. This causes a lowto be applied to the input of the invertor IC4E at pin11. As a result, a high is applied to the input pin 12of the Priority Encoder IC5. The Priority EncoderIC5 produces an output binary code 010 (of value 2)and applies it to the Analog Multiplexer IC6. Theanalog switch in IC6 between input pin IC6-15 and

11

12V

2

2

SWILED

TONE 1SW1

543

R3100K

C20.47

8

RN2A330K

IC2A4044B+

C20.47

CR4IN4006

CR3IN4006

+

C30.01

C510

RN1A1K

11 3

2

SWILED

TONE 2SW2

543

8

RN1B1K

11 4

2

SWILED

TONE 3SW3

543

8

RN1C1K

11 5

2

SWILED

TONE 4SW4

543

8

RN1D1K

11 6

2

SWILED

MUSICSW5

543

8

RN1E1K

11 7

2

SWILED

TESTSW6

543

8

RN1F1K

R1100

R41K

RN4C10K

RN4D10K1

2

SWOLED

CANCELSW7

43

12V 12V 12V 12V 12V

12V

1 2

RN2D330K

1 5

RN2E330K

1 6

RN2F330K

1 7

RN2B330K

1 3

15

16 5

148

1

GND

E

QS

R

PWR

IC2B4044B

3

4

13Q

S

R

IC1A4044B

C40.01

15

16 5

148

1

GND

E

QS

R

PWR

IC1C4044B

7

6

9Q

S

RIC1D

4044B

11

12

J1

+ 12V

TONE 1

TONE 2

TONE 3

TONE 4

TEST

GND.

MUSIC

VOICE REC.

MUS. RLY

RESET

N.C.

10Q

S

R

RN2C330K

1 4

IC2C4044B

7

6

9Q

S

R

IC2D4044B

11

12

10Q

S

R

IC1B4044B

3

4

13Q

S

R

12V

7

8 5 6

290A2664-10

RN4A10K

1 2

RN4B10K

RN3E10K

3 4

RN3D10K

7 8

RN3C10K

5 6

RN3B10K

3 4

RN3A10K

IN4006CR1

Q1TIS92

1 2

R21K

CR2LEDGRN

9 10

+

1

2

3

4

5

6

7

8

9

10

11

12

Q2TIS92

Q3TIS92

Q4TIS92

Q5TIS92

Q6TIS92

Q7TIS92

Q8TIS92

NOTES:

1. P.C. BOARD ASSEMBLY 2001147.

2. ALL RESISTORS ARE IN OHMS, 1/4W, K = 1000, UNLESS OTHERWISE SPECIFIED.

3. ALL CAPACITORS ARE IN MICROFARADS (UF), UNLESS OTHERWISE SPECIFIED.

Figure 4-2. Switch Board Schematic.

IC6-3 closes. The remote PA audio input signal cou-pled to TB2-12 is applied to the remote PA preamplifier IC9B pin 6 through C30 and R29. The pre-amplified remote PA audio signal is coupled to theinput of the power amplifier IC3-9 through C45, levelcontrol R52, C49, the analog switch between pinsIC6-15 and IC6-3 and capacitor C10. This signal isthen amplified and applied to the signal lines at TB1-2 as described earlier. The remote PA has priorityonly over the background music. Activation of anyone of the tones or local PA will override remote PA.

4-4

D. Background Music (AUX - IN).

The 300VSC also has provision for playing backgroundmusic over SelecTone speaker/amplifiers, if desired. Thisis the lowest priority feature. Local PA, all four tones andremote PA will override background music. When theAUX push button is depressed, the associated red LEDilluminates and a high is applied to pin 11 of the PriorityEncoder IC5. As a result, a binary code 001 (value 1) isapplied to Analog Multiplexer IC6 control inputs. Thiscauses a music source input, connected at RCA jack J10at the rear of the 300VSC, to be connected to the inputpin of power amplifier IC3 through level control R49,C46, analog switch between IC6-14 and IC6-3 and C10.This music audio signal is then amplified and applied tothe remote SelecTone speaker/amplifiers via signal linesas described earlier.

K3A

TO J5-3 TONE #1

TO J7-3 TONE #2

TO J6-2 TONE #3

TO J6-3 TONE #4

K7AK8A K5A

+ 12VDC

NO TONE ENERGIZED

290A2664-06

Figure 4-3. Tone Control Relays (No Tone Activated).

Figure 4-4. Tone Control Relays (Tone 2 Activated).

K3A

TO J5-3 TONE #1

TO J7-3 TONE #2

TO J6-2 TONE #3

TO J6-3 TONE #4

K7AK8A K5A

+ 12VDC

TONE #2 ENERGIZED

290A2664-07

E. Test Circuit.

The TEST circuit allows the testing of the 300VSC functions such as local PA, all the tones, remote PA,and background music, without activating the remoteSelecTone devices. This circuitry also cancels false alarms.

A tone is tested by first pressing the TEST push buttonswitch at front panel of the 300VSC and then pressing theappropriate tone push button. When the tone push button ispressed, the tone module for the selected tone operates asdescribed previously in this section. As shown in theschematic diagram 4-2, pressing of TEST push button sets the associated flip-flop IC1B and turns Q6 on by providing base drive through resistor RN4A. Transistor Q6 simultaneously energizes the red LED associated withTEST push button and relay K1 as shown on schematicdiagram 4-1. When K1 is energized, the normally closedcontact K1A opens and disables the audio output relay K2 by removing +12 VDC source from its relay coil.Consequently, the Audio Amplifier output is not connectedto the SIG. HI terminal TB1-2. Therefore, the tone signalis not applied to remote SelecTone devices. However,the circuitry between the Audio Amplifier and MonitorSpeaker is not disconnected, so the tone is still beingsounded from the Monitor Speaker.

F. Cancel Circuit.

The CANCEL circuit allows the operator to reset any ofthe locally (manually) activated functions, such as TEST,tones or background music. As shown in the schematicdiagram 4-2, when a function button is pressed at frontcontrol panel, a low is applied to the ‘S’ pin of the associated flip-flop. This sets the flip-flop. The output of that flip-flop goes high and provides base drive to theoutput transistor, which turns on the red LED and therelay associated with that function. When signaling ortesting is completed, pushing the CANCEL buttonmomentarily resets all functions to their stand-by condition. When the CANCEL push button is pressedmomentarily a low is applied simultaneously to the resetpins of all of the flip-flops through resistor R1 and R4.This causes all the set flip-flops to reset and remove thebase drive signals from the associated output transistors.Consequently, all of the energized relays will de-energizeand all the illuminated red LEDs will extinguish.

4-5

G. Power Supply.

The power supply is the source of regulated +24 VDCnecessary for the operation of audio power amplifier of300VSC. The power supply also provides +12 VDC necessary for the operation of all the electronics circuitryin the 300VSC. This +12 VDC source supplies DC operating voltage to all the tone modules. The power supply is capable of operating from either 120 VAC or 24 VDC.

The power supply uses a step down transformer, T1, witha full wave bridge rectifier, CR25. The rectified outputfrom the CR25 is filtered by C38, R21 and C33. Zenerdiode CR12 develops a stable reference voltage for thebase of the regulator Q2. The regulated +24 VDC is present on the emitter of Q1. This regulator supplies 24 VDC to the input pin of 12 VDC regulator IC2. The+12 VDC output from the IC2 regulator is further filteredby C23 and distributed to all of the electronics circuitryoperating at 12 VDC. MOV, VR7 is connected in parallelwith the secondary of T1 to reduce transients and noisethat could cause damage to the electronic circuitry.

TO

NE

#4

TO

NE

#3

N.C

.

+ 1

2V

+12

V

GN

D

290A2664-09

J2 J31 2 3 4 5 6

1 2 3 4 5 6

1 2 3 4 5 6

Figure 4-5. Tone Connector and Schematic.

290A2664-08

TONE 4

J3

TONE 3

J2

2001164A

1 6

5-1

WARNINGAlways insure that the power to the 300VSC is turned off

before removing the metal cover.

CAUTIONThis service information is for qualified personnel only. To avoid electric shock, do not perform any servicing other than changing fuses, unless qualified to do so.

Refer all servicing to qualified service personnel.

5-1. GENERAL.

WARNINGFailure to follow all safety precautions and instructions may

result in property damage, serious injury, or death to you or others.

SAFETY MESSAGE TO MAINTENANCE PERSONNEL

Listed below are some important safety instructions and precautions you should follow:

• Read and understand all instructions before operating this system.

• Any maintenance to the sound system must be performedby a trained electrician in accordance with NEC guidelines and local codes.

• Any maintenance to the sound system must be done withpower turned off.

Most of the components used in the Model 300VSC are standard electronic parts. Consequently, they can be obtainedfrom almost any radio or electronic outlet.

SECTION VSERVICE

The factory will service your equipment or provide assistance with technical problems that cannot be handledsatisfactorily locally.

Any units returned to Federal Signal for service, inspection,or repair, must be accompanied by a Return MaterialAuthorization. The R.M.A. can be obtained from the localDistributor or Manufacturer’s Representative.

At this time a brief explanation of the service requested orthe nature of the malfunction should be provided.

Address all communications and shipments to:

FEDERAL SIGNAL CORPORATIONElectrical Products DivisionService Department2645 Federal Signal DriveUniversity Park, IL 60466-3195

5-2. REPLACEMENT PARTS.

Description Part Number

Mother board K2001154C

Switch board (300VSC-1) K2001147A

Switch board (300VSC-1044) K2001318

Tone card con. board K2001164A

Fuse F1 250V, K148A155A-011 amp, GMC-1A

Fuse F2 250v, K148A155A1/2 amp, GMC-1/2A

Connector Plug, TB-1 K140A332A-1717 position

Connector Plug, TB-2 K140A332A-1616 position

Rack mount accesory kit K8500

BOARD ASSEM300VSC AMP

C12

C33

VR3

VR2

CR6 CR10CR7 CR9CR8

K6

K5

K3

TONE 3

TONE 1

C34 C35 C36

J10J9

VR4

TONE 4

VR5

TONE 2

CR14

R18

J6

J5

K7

CR17

CR11K4

R51Q3

CR12 CR13

R37

C18

R15 R16

IC7

R17

K8

R56

C20

R39

R52

R38

R54R53 R55

R40

R19

R21

C1

R46

R45

C281

IC9

J

C22

C17

R22 R24R23

IC8

R20

C15

J1 J2

C3

R1 R2

C1

R3

IC1

R5 R6R4

C2

R9R7 R8

1

J3

2001154D

IC4 IC5 C13

5-2

290A2844B

MBLY, PCPLIFIER

19

J7

C38

VR6 VR7

R57

C37

F2

J11

F1

1/2 AMP

250V

250V

B

R59R58

C39 C40

R60

C31

120V

C30

240VSW1

C32

WJ8

R43

R50

1 AMP1

T1

R49R48R47

C21

C23

R41

C27

C24

R30

C16

R27 R28 R29

IC6C14

CR15

C25

CR16CR18 CR19

R42

R32

R25

R31

R33

R26

R35

J4

R34

CR4

R36

VR1

CR5CR20

C26

C29

R44

K1

K2

Q2

C9

IC2

C11

C4

R10 CR2CR1

R12R11

R13

1

C5C8

IC3

C6

CR3

C7

Q1

C10 R14

Figure 5-1. Model 300VSC Mother Board Parts Location.

Identification. Number Part Number. Description

C1, C2, C5, C9, C10, C12, C13, C25, C34 107A1001-03 CAPACITOR, MONO .1, 50V

C3, C28, C30, C35, C36, C37, C43, 108A142 CAPACITOR, LYTIC 2.2, 25VC44, C45, C46, C47, C48, C49

C4 107A907 CAPACITOR, MONO .33, 50V

C6, C15, C27, C31 108A143 CAPACITOR, LYTIC 10, 35V

C7, C21, C23 108A146 CAPACITOR, LYTIC 100, 16V

C8 107A261 CAPACITOR, DISC .02, 25V

C11 107A402 CAPACITOR, MYLAR.0022, 100V

C14, C16, C19, C20, C22 107A1026 CAPACITOR, MONO .01, 50V

C17, C24 107A232 CAPACITOR, DISC 12pf, 100V

C18, C26, C29 108241 CAPACITOR, LYTIC 22, 35V

C32, C33 108A153 CAPACITOR, LYTIC 330, 50V

C38 108A251 CAPACITOR, LYTIC 3300, 50V

C39, C40, C41, C42 108A245 CAPACITOR, LYTIC 22, 50V

CR1 , CR2, CR3, CR4, CR5, CR7, CR9, 115A313 DIODE, 1N4006CR10, CR11 , CR13, CR16, CR20,CR22, CR23, CR25

CR18, CR19, CR21 115B301 DIODE, 1N5059

CR12 115A242 DIODE, 1N5253B

CR28 115A601 BRIDGE, RECT, BFW-50

FC1, FC2, FC3, FC4 144A125 CLIP, FUSE

F1 148A155-01 FUSE, 1 AMP

F2 148A155 FUSE, 1/2 AMP

IC1 128A208 IC, ILD-1, OPTO ISO, DUAL

IC2 128A066 IC, MC7812, 12V REG.

IC3 128258 IC, TDA1521, AMP

IC4, IC7 128A059 IC, MC14584B, INV

IC5 128A060 IC, 4532BE, 8 BT

IC6 128A062 IC, 4051, 8 CHANNEL

IC8 128A043-02 IC, LM555C, TIMER

IC9 128A267 IC, 2139, DUAL OP AMP

IC10 128A159 IC, 7805UC, 5V REG.

IC11 128A045 IC, LM358, DUAL OP AMP

PARTSMODEL 300VSC-1

5-3

Identification. Number Part Number. Description

J1, J2 142121 JACK, PHONE

J3 140A235-04 HEADER, 12 POSITION

J4 140A235 HEADER, 2 POSITION

J5, J7 139A290 CONNECTOR, EDGE

J6 139A151 CONNECTOR, EDGE, 6 POSITION



J10 142A123 JACK, RCA

J11 140302 HEADER, 2 POSITION

K1, K2, K3, K4, K5, K6, K7, K8 131A130-01 RELAY, 12 VOLT

PCB1 130537D PCB, 300VSC

Q1, Q4 125A447 TRANSISTOR, MPS-A05

Q2 125B415 TRANSISTOR, 2N5296

Q3 125B133 TRANSISTOR, TIS93

Q5 125A113 TRANSISTOR, 2N3702

RN1, RN2 100A825 RESISTOR, NW 5 X 47K OHM, 2%

RN3 100A817 RESISTOR, NW 5 X 10K OHM, 2%

R1, R31 100A298 RESISTOR, CF 4.7K OHM 5%, 1/4W

R2, R3, R24, R26, R29, R39 100A225 RESISTOR, CF 2.2K OHM 5%, 1/4W

R4, R5, R6, R7, R47, R49 100A262 RESISTOR, CF 100K OHM 5%, 1/4W

R8, R9, R11 100A258 RESISTOR, CF 18K OHM 5%, 1/4W

R10, R16, R28, R30, R37, R42, R44, 100A257 RESISTOR, CF 10K OHM 5%, 1/4WR45, R46, R50

R12, R32, R36, R51 100A226 RESISTOR, CF 150K OHM 5%, 1/4W


R14, R43 100A215 RESISTOR, CF 1 MEG OHM 5%, 1/4W


R17, R18, R20, R23, R25, R34, R42 100A228 RESISTOR, CF 47K OHM 5%, 1/4W

R19 100A234 RESISTOR, CF 8.2 OHM 5%, 1/4W

R21 100A308 RESISTOR, CF 220 OHM 10%, 1/2W

R33 100A213 RESISTOR, CF 220K OHM 5%, 1/4W

R38 105A278 POTENTIOMETER, 50K OHM

R40 100A259 RESISTOR, CF 22K OHM 5%, 1/4W

R41 100A605 RESISTOR, CF 120 OHM 10%, 2W

R48 100A313 RESISTOR, CF 680 OHM 10%, 1/2W

R49, R50, R51, R52 105A248 POTENTIOMETER, 5K OHM

S1 122279 SWITCH, DPDT

T1 120B255 TRANSFORMER, 24VAC

VR1, VR2, VR3, VR4, VR5, VR6 114A103 VARISTOR, 18V

VR7 114A102 VARISTOR, 39V

S LISTMOTHER BOARD

SW4

C3

C4

RN1

RN3

Q1

IC2

C2

R3

R1

C1

SW3

SW2

SW1

1

1

1

Q2 Q3 Q4

J1

GN

DT

ES

TT

ON

E 4

TO

NE

3T

ON

E 2

TO

NE

1+

12VD

C

Identification Number Part Number. Description

C1 107A645 Capacitor, Tant .47 35V

C2 107A645 Capacitor, Tant .47 35V

C3 107A1026 Capacitor, Mono .01 50V

C4 107A1026 Capacitor, Mono .01 50V

C5 108A143 Capacitor, Lytic 10 35V

CR1 115A313 Diode, 1N4006

CR2 147A112-02 LED, Green

CR3 115A313 DIODE, 1N4006

CR4 115A313 DIODE, 1N4006

IC1 128A067 IC, 4044B, R-S Latch

IC2 128A067 IC, 4044B, R-S Latch

J1 140308-12 HEADER, 12 Position

PCB1 130531A PCB, 300VSC Switch

Q1 125B132 Transistor, TIS92






5-4

RN4

R4

R2

C5

CR2

SP1

Q6

R1

Q7 Q8

Q8

R4

R3

RN2

IC11

1

1

SW5

SW6

SW7

+

LAY DOWNC5 CAPACITOR

RE

SE

TM

SC

LRV

OIC

EM

US

ICG

ND

2001147A

290A2845

Identification Number Part Number. DescriptionQ7 125B132 Transistor, TIS92Q8 125B132 Transistor, TIS92

RN1 100A809 Resistor Network, 7X1K, 2%RN2 100A826 Resistor Network, 7X330K, 2%RN3 100A802 Resistor Network, 5X10K, 2%RN4 100A802 Resistor Network, 5X10K, 2%R1 100A240 Resistor, CF 100 OHM 5% 1/4WR2 100A233 Resistor, CF 1K OHM 5% 1/4WR3 100A262 Resistor, CF 100K OHM 5% 1/4WR4 100A233 Resistor, CF 1K OHM 5% 1/4WSP1 230A151 Spacer, Plastic, #6SW1 122A297 Switch, SPDT, Red LEDSW2 122A297 Switch, SPDT, Red LEDSW3 122A297 Switch, SPDT, Red LEDSW4 122A297 Switch, SPDT, Red LEDSW5 122A297 Switch, SPDT, Rde LEDSW6 122A297 Switch, SPDT, Rde LEDSW7 122A297-01 Switch, SPDT

Figure 5-2. Model 300VSC-1 Switch Board Parts Location.

5-5

Identification Number Part Number Description

PCB 130705A PC BOARD

R1, R4, R6, R7, R14, R22, R24, R25 100A233 RES, CF 1K

R2, R3, R5, R13, R15, R16 100A212 RES, CF 330K

R8, R9, R10, R11, R12, R18, R19, R20, R23 100A257 RES, CF 10K

R17 100A262 RES, CF, 100K

R21 100A240 RES, CF 100

C2, C3 1071040 CAP, MONO, 0.1uF

C1 108A143 CAP, LYTIC, 1OuF

C4, C5 107A645 CAP, TANT, 0,47uF

D1 147A112-02 LED, GREEN

CR1, CR2, CR3 115A119A DIODE, IN4007

IC1, IC2 128A067A I.C, 4044B, QA

Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 125B132 TRANS, TIS92, NPN

SW1, SW2, SW3, SW4, SW6, SW7 122A297 SWITCH WITH LED

SW5 122A297-01 SWITCH, SPDT

JP1 140308A-12 HEADER, 12 pos.

SP1 230A151A SPACER, PLASTIC

2001318

CR3

C5

C4

MH4

MH3

MH2

MH1

CR1

R22

SW1

R4

R23

C2

R6

D1

C1

IC1

SW5

BC

E

Q8

R19

R12

R20

R18

BC

E

Q7

BC E

Q6

CR2

IC2

R2

R17

C3

BC

E Q5

BC

E

Q4R1 R14

R7

R11

R21

JP1

R24

R3

SW2

R13

SW4

R5

SW3

R15

SW6

BC E

Q1

BC

E

Q3

R10

R16

SW7

R25

BC

E

Q2

R9

R8

GND

MUSIC

VOICE

MSCRLY

RESET

LAY C2

DOWN

TONE 2

TONE 1

TONE 4

TONE 3

CANCEL

AUX

TEST

+12VDC

TONE1

TONE2

TONE3

TONE4

TEST

SP1

290A3617

federal signal corporation electrical products division · 2019-08-26 · federal signal...

Documents