Усилитель infinity 475a инструкция

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Reference Series

475a

4,3,2 CHANNEL POWER AMPLIFIER

SERVICE MANUAL

Infinity Systems, Inc.

250 Crossways Park Dr.

Woodbury, New York 11797 Rev1 3/2008

Released 2007

Discontinued XXXX

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475a Reference Series

— CONTENTS —

BASIC SPECIFICATIONS ………………..……….……..1

DETAILED SPECIFICATIONS ………….…..…….……..2

PACKING……………………….……………..……………3

APPLICATIONS……………………………………………4

INSTALLATION/SETUP……………………………………6

BASIC TROUBLESHOOTING..…….…….………………6

EXPLODED VIEW/PARTS LIST………………………….7

NOTE ON TOP COVER……………………………………8

AMPLIFIER BLOCK DIAGRAM……………………..……9

P.C.B. DRAWINGS….…………………………………….10

ELECTRICAL PARTS LIST ……………………………. 16

IC/TRANSISTOR PINOUTS..…………………………….21

SCHEMATICS……………….……..…………..……..…..22

Reference 475a Basic Specifications

Output Power: 75W RMS x 4 @ 4 ohms; ≤1% THD + N

(14.4 VDC) 90W RMS x 4 @ 2 ohms; ≤1% THD + N

Signal-to-noise ratio: 85dBA (reference 1W into 4 ohms)

Dynamic power: 117W channels @ 2 ohms

Effective damping factor: 6.3 @ 4 ohms

Frequency response: 10Hz – 100kHz (-3dB)

Maximum input signal: 6.0V

Maximum sensitivity: 100mV

Output regulation: 0.21dB @ 4 ohms

Dimensions (L x W x D): 14-3/16″ x 9″ x 2-11/16″ (361mm x 229mm x 69mm)

Fuse: 2 x 35A

Infinity continually strives to update and improve existing products, as well as create new ones. The specifications
and details in this and related JBL publications are therefore subject to change without notice.

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475a Reference Series

INFINITY REFERENCE 475a AMPLIFIER SPECIFICATIONS

TEST VOLTAGE 14.4 +0.1V

Specification Rating Unit Remarks

Power Output 4ohm loads @1kHz
(stereo mode) for each ch @<1.0%THD
(Unit:W)(LPF=22K)

(stereo mode) for each ch @<1.0%THD
(Unit:W)(LPF=22K)

Bridged (Stereo) Mode 4ohm loads @1kHz ≥240W x 2 Watts

≥75W x 4 Watts

≥90W x 4 Watts

Power Output 2ohm loads @1kHz

THD Power 4 ohm loads
and 1MD@Reference (Unit:%) LPF=22K

THD Power 2 ohm loads
and 1MD@Reference (Unit:%) LPF=22K

THD Power 4 ohm loads
Bridged (Stereo) Mode (Unit:%) LPF=22K

Channel Separation
@full rated power (+80KHZ) @1kHz

Full rated power Distortion 1KHz LPF=22KHz ≤0.1% %

Signal/Noise Ratio
a: 1 watt into 4 ohms
b: full rated power (dB)

Input Sensitivity
Low Level Input(v) @:full rated power

Frequency response (Unit:-3dB) 10Hz~100kHz Hz -3dB

High-Pass Crossover Frequency limits +20% 40Hz – 450Hz Hz

Low-Pass Crossover Frequency limits +20% 40Hz – 450Hz Hz

Bass Boost:(Unit:dB) @50Hz (±5Hz ) 0~6dB dB ±1dB

≤0.5% @1kHz %

≤0.5% @1kHz %

≤0.5% @1kHz %

≥45dB

>90

100mV-6V Volts ±20%

dBA

1 watt into 4 ohms

1V signal input

Idle Current ( @ 4ohm) 0.5A A ±0.15A

MAX current : rated power
(All channel 2 ohm loads)

DC Offset: ≤30mV mV
Damping Factor (4ohm):

Effective damping factor (4ohm): 6.395

Dynamic Power @ 2 ohms 130W Watts
Output Regulation @ 4 ohms 0.03dB dB
Remote Operating Voltages: ON 5V OFF 4V Volts ±1V
Turn on delay time 2 to 3 Sec
Circuit Protection
a. Temperature
b. Speaker Short Circuit
c. Operating Voltage Range
Dimensions (L x W x H): 14-3/16″ x 9″ x 2-11/16″

(361mm x 229mm x69mm)

Fuses 35A x 2 A

≤65A A

＞200

95 ±5 deg C

Yes

8~16V

Inches

mm

+0.5V

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475a Reference Series

PACKAGING

Item Part Number Description Qty

1 CH4482901203 Outer Carton 1
2 REF475a REF475a Amplifier 1
3 Plastic Bag 1
4 BZL279112001 Packing Foam 1
5 Visit Infinitysystems.com Owner’s manual 1
6 Plastic Bag 1
7 Accessory kit consisting of: 1

LS1CJ0402507 Mounting Screws 4
1601-353G-00 SPARE 35A FUSES 2

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475a Reference Series

APPLICATIONS – 475a

The 475a can be set up for stereo 4-channel,
3-channel or bridged 2-channel operation, as
shown in Figures 5 through 8.

NOTE:

• Minimum speaker impedance for stereo
operation is 2 ohms. Minimum speaker
impedance for bridged operation is 4 ohms.

• Not all possible applications are shown here;
e.g., the applications shown in Figures 5, 6 or 8
could include a separate subwoofer driven by
an additional amplifier. In that case, the user
should refer to Figure 6 for crossover and sub
amp connection suggestions.

Figure 5. 475a connected to full-range speakers. Note
crossover and channel assignment settings.

Figure 6. 475a connected to four satellite speakers
and used in conjunction with an additional
subwoofer amplifier or powered subwoofer.
Note crossover and channel assignment settings.

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475a Reference Series

APPLICATIONS – 475a

Figure 7. 475a connected in tri-mode to a subwoofer

and a pair of satellite speakers. Note crossover and
channel assignment settings.

Figure 8. 475a connected in bridge mode to a pair of
full-range speakers. Note crossover and channel
assignment settings.

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475a Reference Series

INSTALLATION AND SETUP

Refer to the illustrations on the previous pages
for control location.

Reconnect the (–) negative lead to the vehicle’s
battery. Apply power to the audio system and
play a dynamic music track.

SETTING THE CROSSOVER(S)

Determine your system plans and set the
crossover-mode switch accordingly. If your
system design does not include a subwoofer,
set the crossover mode to FULL and skip to
“Setting Input Sensitivity.”

If your system includes a subwoofer, set the
crossover mode to HP (high-pass) for your
full-range speakers. Adjust the crossover
frequency to limit bass, and provide increased
system volume with less distortion.

Mode Switch:

Full: Allows a full-range signal through to the

speakers; can be used with larger full-range
speakers such as 6″ x 9″s.
HP: Allows a high-pass signal through to
the speakers; should be used with most
loudspeakers (can protect your full-range
speakers from being overdriven with low
frequencies, one cause of speaker damage).
LP: Allows only bass to pass through to the
speakers; should be selected when powering
subwoofers.

High-Pass Filters: Initially set the crossover­frequency control midway. While listening
to music, adjust the crossover for the least
perceived distortion from the speakers, allowing
them to reproduce as much bass as possible.

Low-Pass Filters: For subwoofers, choose
the highest frequency that removes vocal
information from the sound of the subwoofer.

If using the 475a to drive a subwoofer(s), set
the crossover mode to LP (low-pass) on the
channels connected to the subwoofer.

NOTE: The 1300a, 1600a and the subwoofer
output of the 5350a are low-pass only and
do not have a crossover-mode switch.

SETTING INPUT SENSITIVITY

1. Initially turn the INPUT LEVEL control(s) to
the minimum (counterclockwise) position.

2. On the source unit, increase the volume
control to 3/4 volume. Slowly increase the
INPUT LEVEL control(s) toward three o’clock
until you hear slight distortion in the music.
Then reduce the INPUT LEVEL slightly until
distortion is no longer heard.

NOTE: After the source unit is on, blue LEDs (on
the top panel) will light, indicating the amplifier
is on. If not, check the wiring, especially the
remote connection from the source unit. Also
refer to “Troubleshooting.”

REMOTE LEVEL CONTROL

The 1300a, 1600a and 5350a include a remote
level control. This will allow the subwoofer level
to be adjusted from the listening position.
Connect the remote level control using the
RJ11 jack on the side of the amplifier. Install
the control module in the front of the vehicle
within easy reach of the driver. Both the under­side of the dash and the center console are
suitable locations.

UNDER-DASH MOUNTING

Select a mounting location that allows easy
access to the control while driving. Using the
REMOTE LEVEL control as a template, mark and
drill holes in the mounting surface. Attach the
REMOTE LEVEL control using the mounting
screws provided (Figure 11).

Figure 11. Under-dash mounting of the
REMOTE LEVEL control.

Route the cable behind the dash or other
interior panels and under the carpet. Do not
route the cable outside the vehicle. Connect the
RJ11 cable between the RJ11 receptacle on the
amp and the receptacle on the REMOTE LEVEL
control (Figure 12).

Figure 12. REMOTE LEVEL control electrical
connection.

SETTING THE BASS BOOST

The Bass Boost control will allow you to enhance
the bass output of your system at 50Hz up to 6dB.

AUX OUTPUT

Reference amplifiers (except 5350a) are
equipped with full-range outputs that can be
used to connect additional amplifiers.

STATUS LEDs
Power: Indicates the amplifier is on.
Protection: Refer to “Troubleshooting” for specific

indications.

Figure 13. LED status.

TROUBLESHOOTING

• PROBLEM: No audio (POWER LED is off).

CAUSE and SOLUTION: No voltage at BATT+
and/or REM terminals, or bad or no ground
connection. Check voltages at amplifier
terminals with VOM.

• PROBLEM: No audio (PROTECT LED glows red).

CAUSE and SOLUTION: DC voltage on amplifier
output. Amplifier may need service; see
enclosed warranty card for service information.

• PROBLEM: No audio (PROTECT LED glows red).

CAUSE and SOLUTION: Amplifier is overheated.
Make sure amplifier cooling is not blocked at
mounting location; verify that speaker-system
impedance is within specified limits.

• PROBLEM:

No audio (PROTECT LED glows red).

CAUSE and SOLUTION: Voltage less than 9V on
BATT+ connection. Check vehicle charging system.

• PROBLEM: No audio (PROTECT LED glows red).

CAUSE and SOLUTION: Voltage greater than
16V or less than 8.5V on BATT+ connection.
Check vehicle charging system.

• PROBLEM: Distorted audio.

CAUSE and SOLUTION: Input sensitivity is
not set properly, or amplifier or source unit is
defective. Check INPUT LEVEL setting, or check
speaker wires for shorts or grounds.

• PROBLEM: Distorted audio (PROTECT LED glows

intermittently).

CAUSE and SOLUTION: Short circuit in speaker
or wire. Remove speaker leads one at a time to
locate shorted speaker or wire, then repair.

• PROBLEM: Music lacks “punch.”

CAUSE and SOLUTION: Speakers are not
connected properly. Check speaker connections
for proper polarity.

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475a Reference Series

Item# Part Number Description Qty

1 SG-0016-2601 Top cover (original, see Page 1

SG-0001-2607 Top cover (Rev1, see Page 1
2 GD-600011400 Light panel 1
3 SR-F475-0117 Main heat sink 1
4 LSIFM0300011 Screw 5
5 Main PCB 1
6 MK-0005-2601 Front panel 1
7 LS5KP0300807 Screw for F/RP 8
8 LS5KJ0301007 Screw for terminal, RCA jacks 6
9 XN-10500-012 Knob 6

10 LSIAP0300607 Screw 6
11 LSIAM0300607 Screw 2
12 XG-0017-2601 Bottom plate 1
13 LSIAY0301201 Screw 2
14 PL-L0007-000 Transistor spring clip (2) 4
15 PL-L0006-000 Transistor spring clip (1) 6
16 ZL-10037A-15 Space Pole 2
17 HG-0006-2601 Rear panel 1
18 LSIAA0200501 Screw 1
19 LS1AM0250401 Screw 4
20 LED PCB 1
21 CP-B00011400 LED lens 1

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475a Reference Series

NOTE ON TOP COVER FOR INFINITY REFERENCE MODELS REF475A, REF1300A, REF1600A

• There was a revision in the top cover design starting with the serial number range(s) noted below, or
identified by the brace design in the supplied images.

• Note the Rev1 Top cover will not fit properly on the original heatsink.

Top Cover Part Numbers

MODEL PART NUMBER SERIAL NUMBER

EV0001-01000

REF475A

REF475A

REF1300A

REF1300A

REF1600A

REF1600A

SG-0016-2601

SG-0001-2607

SG-0016-2601

SG-0001-2607

SG-0016-2601

SG-0001-2607

to
EV0001-09138
EV0001-09139

And ab ove

EV0003-01000

to
EV0003-08606
EV0003-08607

And ab ove

EV0004-01000

to
EV0004-11811
EV0004-11812

And ab ove

The Infinity 475a has emerged as a noteworthy addition to the market, appealing to both professionals and enthusiasts alike. This innovative product combines cutting-edge technology with user-friendly features, making it a valuable tool for a variety of applications. In this review, we will dive into the capabilities, design, and overall performance of the Infinity 475a, along with its strengths and weaknesses.

One of the most impressive aspects of the Infinity 475a is its versatility. Designed to cater to a wide range of needs, it excels in various areas, including:

• Performance: The Infinity 475a is equipped with a powerful engine that provides unmatched efficiency, enabling it to handle demanding tasks with ease.
• Durability: Built with robust materials, this product promises longevity and resilience, even in the face of rigorous use.
• User Experience: Its intuitive interface ensures that users, regardless of their skill level, can maximize the potential of this device without frustration.

Additionally, the design of the Infinity 475a is both practical and aesthetically pleasing. The ergonomic structure allows for comfortable handling, while the sleek finish adds a modern touch. Users will appreciate the thoughtful placement of controls, which enhances accessibility and ease of use. Moreover, the compact design ensures that it can easily fit into various working environments without overwhelming the available space.

In terms of performance, the Infinity 475a does not disappoint. Users have reported consistent results, thanks to its advanced technology that optimizes efficiency. Whether you are using it for personal projects or professional undertakings, the output is reliably precise. Furthermore, the machine operates quietly, allowing for a pleasant user experience without unnecessary noise distractions.

However, like any product, the Infinity 475a is not without its drawbacks. Some users have noted that while it offers many features, certain advanced functionalities may require a learning curve. This could be daunting for less experienced users. Additionally, the price point may be a concern for some, as it positions itself toward the higher end of the market spectrum.

In conclusion, the Infinity 475a stands out as a robust and versatile product that successfully meets the needs of various users. Its combination of durability, performance, and user-focused design makes it a competitive choice within its category. While there are a few areas that could be improved, the overall experience with the Infinity 475a is overwhelmingly positive. Whether you are a seasoned professional or a newcomer to the field, this product is worth considering for your toolkit. The investment in the Infinity 475a is likely to pay off in the long run through its reliable performance and extensive range of applications.

Хорошее руководство по эксплуатации

Законодательство обязывает продавца передать покупателю, вместе с товаром, руководство по эксплуатации Infinity Reference 475A. Отсутствие инструкции либо неправильная информация, переданная потребителю, составляют основание для рекламации в связи с несоответствием устройства с договором. В законодательстве допускается предоставлении руководства в другой, чем бумажная форме, что, в последнее время, часто используется, предоставляя графическую или электронную форму инструкции Infinity Reference 475A или обучающее видео для пользователей. Условием остается четкая и понятная форма.

Что такое руководство?

Слово происходит от латинского «instructio», тоесть привести в порядок. Следовательно в инструкции Infinity Reference 475A можно найти описание этапов поведения. Цель инструкции заключается в облегчении запуска, использования оборудования либо выполнения определенной деятельности. Инструкция является набором информации о предмете/услуге, подсказкой.

К сожалению немного пользователей находит время для чтения инструкций Infinity Reference 475A, и хорошая инструкция позволяет не только узнать ряд дополнительных функций приобретенного устройства, но и позволяет избежать возникновения большинства поломок.

Из чего должно состоять идеальное руководство по эксплуатации?

Прежде всего в инструкции Infinity Reference 475A должна находится:
— информация относительно технических данных устройства Infinity Reference 475A
— название производителя и год производства оборудования Infinity Reference 475A
— правила обслуживания, настройки и ухода за оборудованием Infinity Reference 475A
— знаки безопасности и сертификаты, подтверждающие соответствие стандартам

Почему мы не читаем инструкций?

Как правило из-за нехватки времени и уверенности в отдельных функциональностях приобретенных устройств. К сожалению само подсоединение и запуск Infinity Reference 475A это слишком мало. Инструкция заключает ряд отдельных указаний, касающихся функциональности, принципов безопасности, способов ухода (даже то, какие средства стоит использовать), возможных поломок Infinity Reference 475A и способов решения проблем, возникающих во время использования. И наконец то, в инструкции можно найти адресные данные сайта Infinity, в случае отсутствия эффективности предлагаемых решений. Сейчас очень большой популярностью пользуются инструкции в форме интересных анимаций или видео материалов, которое лучше, чем брошюра воспринимаются пользователем. Такой вид инструкции позволяет пользователю просмотреть весь фильм, не пропуская спецификацию и сложные технические описания Infinity Reference 475A, как это часто бывает в случае бумажной версии.

Почему стоит читать инструкции?

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