Federal Signal Corporation PA300 Series, PA300-012-NYSB Supplement Sheet

2561549B

290A3859

BLU

P5

SPEAKER, COMMON

SPEAKER, LOW POWER(58W)

SPEAKER, HIGH POWER(100W)

(NEG.) (-)

(POS.) (+)

HORN RING

CHASSIS GROUND

ORN
BRN

BLK
GRN
RED

WHT
BRN

NEVER CONNECT THE BROWN AND ORANGE SPEAKER
WIRES TOGETHER TO THE SPEAKER(S).

BRN

WHT/YEL

HORN

VEHICLE TWO-WAY

RADIO SPEAKER

123

456

789

10 11 12

*
*

*

REV. B 601
Printed In U.S.A.

SUPPLEMENT SHEET

MODEL PA300 SERVICE MANUAL

FOR MODEL PA300-012-NYSB

A. GENERAL.

The 100-watt output of the basic Model PA300
was designed to drive a single high power speaker.
However, the essential difference between models is
that the PA300-012-NYSB can drive one or two 11­ohm impedance, high or low power speakers. When
two speakers are used they must be connected in
parallel.

B. MANUAL CHANGES.

The following changes should be made to the
Model PA300 Installation and Service Instructions
(Part No. 255A198).

1. Page 2. Change the following paragraphs,

as shown below:

Frequency Range 800 to 1800Hz

TO

Control Cable Wiring Diagram.

Using 18 gauge wire, connect the speaker
leads (58W speakers to SPEAKER LO POWER and
100W speakers to SPEAKER HI POWER) as shown
in the Control Cable Wiring Diagram (new).

Operating Current (14.0Vdc-WAIL)

1 Low Power Speaker 5 amperes
2 Low Power Speakers 10 amperes
1 High Power Speaker 10 amperes
2 High Power Speakers 15 amperes

Voltage Output (approx.)

1 Low Power Speaker 45Vp-p
2 Low Power Speakers 40Vp-p
1 High Power Speaker 64Vp-p
2 High Power Speakers 60Vp-p

2. Page 4, paragraph 3-3.A. Speaker. Change

to read:

A. Speaker.

The unit is designed to operate with one 11­ohm impedance speaker or two 11-ohm impedance
low power (58W) or high power (100W) speakers,
connected in parallel and in phase. On FEDERAL
speakers, this can be accomplished by connecting the
two speaker leads marked “1” to the SPEAKER
COMMON control cable lead and the two speaker
leads marked “2” to the SPEAKER HI POWER or
SPEAKER LO POWER control cable leads See the
Control Cable Wiring Diagram (new).

3. Page 7, Paragraph 4-3.E. HI-LO. Change to

read:

E. HI-LO.

This function is not available on the Model

PA300-012-NYSB.

4. Page 8, Paragraph 4-6. PRESS AND HOLD

FUNCTIONS. Change to read:

PRESS AND HOLD FUNCTIONS

Selector Press on Release of
Switch Horn Ring Horn Ring
Position Produces Produces

Manual Peak-and- Coast down

Hold and silence

5. Page 14. Refer to the component location
diagram detail in this supplement to locate the
additional PA300-012-NYSB components (R59, R60).

6. Page 15. A Model PA300-012-NYSB sche­matic diagram is included in this supplement sheet.

7. Page 16. Change the parts list as follows:

a. Add:R59, 60- Resistor, 0.47 ohm, 2W,

10%. Part No. 130A130.

b. Change the Part No. of T2 to

120C165A-04.

c. Change the Part No. of the Circuit

Board (with parts installed) to 200C860-03.

NOTE:
SOLDER SIDE
OF P.C. BOARD
IS SHOWN

R51

Q5 Q6

E

C

CR14

B

R60 R59

8

7654321

B

C

E

Component Location Detail.

CR13

J4

R54

R48

290A3860

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