Infinity 5350-A, Reference 5350-A Service manual

Reference Series

5350a

5,3 CHANNEL POWER AMPLIFIER

SERVICE MANUAL

Infinity Systems, Inc.

250 Crossways Park Dr.

Woodbury, New York 11797 Rev0 8/2007

Released 2007

Discontinued XXXX

5350a Reference Series

- CONTENTS -

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

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

PACKING……………………….……………..……………3

APPLICATIONS……………………………………………4

INSTALLATION/SETUP…………………………...…...…5

BASIC TROUBLESHOOTING..…….…….………………5

EXPLODED VIEW/PARTS LIST………………………....6

AMPLIFIER BLOCK DIAGRAM……………………..……7

P.C.B. DRAWINGS….………………………………..……8

ELECTRICAL PARTS LIST ……………………………. 11

IC/TRANSISTOR PINOUTS..…………………………….17

SCHEMATICS……………….……..…………..……..…..18

Reference 5350a Basic Specifications

Output Power: 50W RMS x 4 channels plus 150W RMS x 1 channel at 4 ohms ; ≤1% THD (14.4 VDC) 60W RMS x 4 channels plus 300W RMS x 1 channel at 2 ohms ; ≤1% THD

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

Dynamic power: 89W x 4 and 332W x 1 at 2 ohms

Effective damping factor: 6.3 @ 4 ohms

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

Maximum input signal: 6.0V

Maximum sensitivity: 100mV

Output regulation: 0.12dB @ 4 ohms

Dimensions (L x W x D): 16-9/16" x 9" x 2-11/16" (421mm x 229mm x 69mm)

Fuse: 2 x 40A

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.

5350a Reference Series

INFINITY REFERENCE 5350a AMPLIFIER SPECIFICATIONS

TEST VOLTAGE 14.4 +0.1V

Specification Rating Unit Remarks

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

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

≥50W x 4 + 150W x 1 Watts

≥75W x 4 + 300W x 1 Watts

Power Output 2ohm loads @1kHz/50Hz

Power Output Bridged (Stereo) Mode 4ohm loads 1kHz @<1.0%THD (Unit:W)(LPF=22K)

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/50Hz 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; 10Hz~200Hz Hz -3dB

High-Pass Crossover Frequency limits +20% 32Hz – 320Hz Hz

≥150W x 2 Watts

≤0.5% @1kHz/50Hz %

≤0.5% @ 1kHz/50Hz %

≤0.5% @1kHz %

≥45dB

>85

>100

100mV-6V Volts ±20%

dBA

1V signal input

Low-Pass Crossover Frequency limits +20% 32Hz – 320Hz; 20Hz – 200Hz Hz

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

Idle Current ( @ 4ohm) 1.9A A ±0.15A

MAX current: rated power (All channel 2 ohm load) ≤75A A

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

Effective damping factor (4ohm): 6.395 Dynamic Power @ 2 ohms 850W 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): 16-9/16" x 9" x 2-11/16"

(361mm x 229mm x69mm)

Fuses 40A x 2 A

＞200

85 ±5 deg C

Yes

8~16V

+0.5V

Inches

5350a Reference Series

PACKAGING

Item Part Number Description Qty

1 CH5082901201 Outer Carton 1 2 REF5350a REF5350a 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 1601-403E-00 SPARE 40A FUSES 2 REMOTE REF AMP Remote Level Control 1 2100-0009-04 (RJ11) control cable 1

To Head Unit

Rear

To Head Unit

ront

Rear Speakers

Subwoofer

Front Speakers

Left Speaker

Subwoofer

Right Speaker

To Head Unit Front Output

5350a Reference Series

APPLICATIONS – 5350a

The 5350a can be configured for 5-channel or 3-channel operation, as shown in Figures 9 and 10.

INPUT MODE SWITCH:

• Use INT (internal mode) to send a signal from the front and rear inputs to the subwoofer.

• Use EXT (external mode) when sending a dedicated signal to the subwoofer inputs; e.g., if your source unit has a subwoofer output.

NOTE: Minimum speaker impedance for stereo operation is 2 ohms. Minimum speaker impedance for bridged operation is 4 ohms. Minimum impedance of any subwoofer or combination of subwoofers is 2 ohms.

Figure 9. 5350a connected to four satellite speakers and a single subwoofer. Note crossover and channel assignment settings.

NOTE: If head unit has only two preamp outputs, do not connect to rear, and place rear input source switch in the FRONT position.

NOTE: If head unit includes a separate subwoofer output, connect it here and place switch in EXT position.

Figure 10. 5350a connected in bridge (3-channel) mode to a pair of satellite speakers and a subwoofer. Note crossover and channel assignment settings.

5350a 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.

5350a Reference Series

Item# Part Number Description Qty

1 SG-0017-2601 Top cover 1 2 GD-600021400 Light panel 1 3 LSIFM0300011 Screw 6 4 SR-F555-0117 Main heat sink 1 5 Main PCB 1 6 MK-0006-2601 Front panel 1 7 LS5KJ0301007 Screw for terminal, RCA jacks 7 8 LS5KP0300807 Screw for F/RP 8

9 XN-10500-012 Knob 7 10 LSIAP0300607 Screw 6 11 LSIAM0300607 Screw 2 12 XG-0018-2601 Bottom plate 1 13 LSIAY0301201 Screw 2 14 PL-L0007-000 Transistor spring clip (2) 8 15 ZL-10037A-15 Space Pole 2 16 PL-L0006-000 Transistor spring clip (1) 6 17 HG-0007-2601 Rear panel 1 18 LSIAA0200501 Screw 1 19 LS1AM0250401 Screw 4 20 CP-B00011400 LED lens 1 21 LED PCB 1

5350a Reference Series

MODEL FREQ

INPUT FL

BALANCED INPUT UNIT

OP OP

GAIN CONTROL

VARIABLE LP 32HZ--320HZ/12dB

11 32 80K

320

MAIN AMP

AMP

2ohm/4ohm

INPUT FR

BALANCED INPUT UNIT

OP OP

GAIN CONTROL

VARIABLE LP 32HZ--320HZ/12dB

11 32 80K

320

7654321

MAIN AMP

2ohm/4ohm

AMP

SPEAKER

BTL-4ohm

SPEAKER

BALANCED INPUT

INPUT RL

UNIT

OP OP

GAIN CONTROL

MODEL FREQ VARIABLE LP 32HZ--320HZ/12dB

11 32 80K

320

MAIN AMP

2ohm/4ohm

AMP

SPEAKER

INPUT RR

BALANCED INPUT UNIT

OP OP

GAIN CONTROL

MODEL FREQ VARIABLE LP 32HZ--320HZ/12dB

11 32 80K

320

MAIN AMP

+VAMP1

+VOP

+V2

Battery

POWER SUPPLY

+V1

+VAMP2

-VAMP2

-V1

-V2

-VOP

-VAMP1

INPUT SUB2

INPUT SUB1

BALANCED INPUT UNIT

OP OP

BALANCED INPUT UNIT

GAIN CONTROL

MODEL FREQ VARIABLE LP 11HZ--200HZ/12dB

11 20 200 11 20050

BASS BOOST VARIABLE 0dB--6dB/50HZ

MAIN AMP

SUB

AMP

2ohm/4ohm

SPEAKER

BTL-4ohm

SPEAKER

2ohm/4ohm

AMP

SPEAKER

ECN NO

DESCRIPTON

DATAAPPROVED

PART NAME:

BLOCK DIAGRAM

PRODUCT MODE:

REF5350a

SCALE: 1:1

UNIT: MM

SIZE: A4

REV: 1.0

DRAWN BY:

CHECKED BY:

APPROVED BY:

JING HUI CHEN

DW GNO:

PART NO:

DATA:

2007.1.25

1 2 3 4 5 6 78

+ 18 hidden pages