JBL PowerBass PB10 Bedienungsanleitung

JBL Incorporated

250 Crossways Park Dr.

Woodbury, New York 797

REV 0 7/00

PowerBassTM Series

PB10Subwoofer

SERVICE MANUAL

PB10

TABLE OF CONTENTS

Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Basic Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Detailed Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Controls and their Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Speaker Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Test Setup and Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Exploded and Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Amplifier Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Amplifier Faceplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Integrated Circuit Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Testing Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Printed Circuit Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

PB10

SAFETY INFORMATION

PB10

BASIC SPECIFICATIONS PB10 Subwoofer

PB10

DETAILED SPECIFICATIONS PB10 Subwoofer

PB10

PB10 Subwoofer Controls an their Function

1. Power - These lights will be red when the unit is

plugged in and not receiving a signal; when the PB 0

receives a signal, the lights will cycle to GREEN. If no

signal is received after 0- 5 minutes the lights will

cycle back to RED (standby) until a signal is present

again.

2. Level Control - The subwoofer Level Control, PB 0,

(located on the rear panel) adjusts the volume of the

subwoofer relative to the rest of the system.

3. LFE/Normal Switch - Ordinarily placed in the Normal

position - but switch to LFE when playing Dolby

DigitaL, DTS or other digital surround modes - see

page 9.

4. Phase Switch - Changes the subwoofer’s output to

be in phase or 80 degrees out of phase with the

program material.

5. Crossover Freq ency - Sets the highest frequency

the subwoofer will reproduce.

6. Line Inp t - Main Input connection to subwoofer

(preferred).

7. Speaker In Jacks - Main Input connection to

subwoofer when line level, subwoofer, or pre-amp

output connectors are not available, or when a high

pass filter (set at 50Hz to main loudspeakers is

desired through the Speaker Output Jacks.

8. Speaker O t Jacks - Connected to main

loudspeakers when the Speaker Input Jacks are used.

Rear Panel

Front Panel

PB10

Speaker Connection

When we designed the PB 0

and PB 2 powered

subwoofers, our goal was to

offer the user the best possible

performance combined with

the most flexible and complete

installation options. Please

look over the following three

examples to determine which

description best matches your

system and follow the

corresponding hookup

instructions.

To use the binding-post

speaker terminals with bare

wire, unscrew the collar until

the hole through the

centerpost is visible under the

collar.

Insert the bare end of the wire

through the hole in the post,

then screw the collar back

down until the connection is

tight. The holes in the center

of the collars are intended for

banana-type connectors.

Dolby Pro Logic (Non-Digital)-Speaker Level

Use this installation method for

Dolby Pro Logic applications

(not Dolby Digital, DTS or

other digital processing),

where the receiver/processor

does not have a subwoofer

output or a volume-controlled

preamp (line-) level output:

Connect your receiver or

amplifier’s front left and right

speaker terminals to the left

and right terminals on the

subwoofer that are marked

“High Level In.” Connect the

left and right terminals on the

subwoofer that are marked

“High Level Out” to the

corresponding terminals on the

back of your front left and right

speakers.

Connect your receiver or

amplifier’s center, left and right

surround-speaker terminals to

the corresponding terminals on

the back of your center, left

and right surround speakers.

PB10

Dolby Pro Logic (Non-Digital)-Line Level

Use this installation method for

Dolby Pro Logic applications

(not Dolby Digital, DTS or

other digital processing),

where the receiver/processor is

equipped with a subwoofer

output or a volume-controlled

preamp (line-) level output:

Use RCA-type patch cords to

connect the line-level

subwoofer outputs on your

receiver or amplifier to the line-

level inputs on the subwoofer.

IMPORTANT: Make sure that

the LFE toggle switch on the

subwoofer is in the “Normal”

position. Do not use the “LFE”

position with Dolby Pro Logic-

only processors.

Note: If your receiver or

amplifier only has one

subwoofer output jack, then

you may connect the

subwoofer output on your

receiver/preamplifier to either

the left or right line-level input

on the subwoofer. It makes no

difference which jack you

choose.

Connect each speaker to the

corresponding speaker

terminals on your receiver or

amplifier.

Make sure your receiver or

processor is configured

correctly; Make sure that the

subwoofer is configured as

“On.”

Note for advanced users: If

your receiver/processor has a

built-in low-pass crossover

filter for the subwoofer output,

then the LFE switch should be

set to the “LFE” position to

bypass the subwoofer’s

internal crossover.

PB10

Dolby Digital or DTS (or Other Digital Surroun Mo e) Connection

Use this installation method for

Dolby Digital, DTS or other

digital surround processors:

IMPORTANT: Make sure that

the LFE toggle switch on the

subwoofer is in the “LFE”

position. Use the line-level

input jacks for the low-

Frequency Effects channel.

Connect these jacks to the LFE

output or subwoofer output on

your receiver or amplifier.

Note: If your receiver or

amplifier only has one

subwoofer output jack, then

you may connect the

subwoofer output on your

receiver/preamplifier to either

the left or right line-level input

on the subwoofer. It makes no

difference which jack you

choose.

Connect each speaker to the

corresponding speaker

terminals on your receiver or

amplifier.

Make sure that you have

configured your surround-

sound processor for

“Subwoofer On”or “LFE On.”

The front left, front right, center

and rear speakers should be

set to “Small” or “Large”

depending on their size and

frequency response. Consult

your receiver’s or processor’s

owner’s manual.

PB10

OPERATION

Power

When the unit is plugged in

and the LEDs on the front of

the unit will turn red. When a

signal is present, the LEDs will

turn green.

Note: It will take several

minutes for the LEDs to turn

from green to red after the

input signal to the subwoofer is

removed. Due to JBL’s

unique, high-output, high-

efficiency amplifier design,

power consumption is minimal

when the subwoofer is not

receiving a signal. The PB 0

The subwoofer Level Control

adjusts the volume of the

subwoofer relative to the rest

of the system. Proper level

adjustments depends on

several variables such as

Level Control

room size, subwoofer

placement, type of main

speakers and listener position.

Adjust the subwoofer level so

that the volume of the bass

information is pleasing to you.

Crossover A justments

The Crossover Frequency

Control determines the highest

frequency at which the

subwoofer reproduces sounds.

If your main speakers can

comfortably reproduce some

low-frequency sounds, set this

control to a lower frequency

setting, between 50Hz- 00Hz.

This will concentrate the

subwoofer’s efforts on the

ultradeep bass sounds required

by today’s films and music. If

you are using smaller bookshelf

speakers that do not extend to

the lower bass frequencies, set

the low-pass crossover control

to a higher setting, between

20Hz- 50Hz. This control is

not used when the LFE switch

is in the “LFE” position.

must be unplugged if you do

not wish to leave it in auto

(standby) mode.

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