Read JBL ARC CINEMA II (serv.man2) Service Manual online
S E R V I C E
M A N U A L
ARC SUB
JBL Consumer Products Inc.
250 Crossways ParkDrive
Woodbury, N.Y. 11797
A Harman International Company
1112-ARCSUB Rev A 4/98
S E R V I C E
M A N U A L
ARC SUB
Discrete Output, High Current
8" Powered Subwoofer
1
Powered Subwoofer
ARC SUB
TABLE OF CONTENTS
Specifications .................................................................1
Warranty .........................................................................2
Safety Symbols ..............................................................2
Controls and Their Functions.........................................3
Test Procedures .............................................................4
Trouble Shooting Before Opening .................................5
Removing the Amplifier ..................................................5
Trouble Shooting After Removal ...................................5
Components Requiring Exact Replacement..................6
Block Diagram ................................................................7
Amplifier Exploded View ................................................8
Cabinet Exploded View..................................................9
Parts Lists.....................................................................10
Packaging and Shipping ..............................................12
Integrated Circuit Diagrams .........................................13
Printed Circuit Boards .................................................14
Schematic Diagrams ...................................................16
SPECIFICATIONS
Amplifier Power RMS
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75 Watts
Drivers .
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8" with high-polymer-laminated cones
Inputs
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Line level and High Level
Outputs*
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High level with High-Pass filter at 180Hz
Crossover Frequency
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50-150Hz
(continuosly variable)
Frequency Response
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45Hz to (50 - 150Hz)
(determined by crossover setting)
External Dimensions (Inches)
Height
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9 1/4"
Width
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14"
Depth
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12 1/2"
Weight .
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23 lbs
External Dimensions (mm)
Height
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235 mm
Width
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356 mm
Depth
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318 mm
Weight .
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10.5 kg
* High-Level (speaker) outputs are active only if high-level input are used.
Occasional refinements may be made to existing products without notice, but will always meet or exceed
original specifications unless otherwise stated.
original specifications unless otherwise stated.
2
Powered Subwoofer
ARC SUB
WARRANTY
This amplifier is warranted against defects in material
and workmanship for a period of 90 days from date of
shipment, when installed in accordance with the owner’s
manual in a clean, dry, interior home environment. THIS
AMPLIFIER IS NOT SUITABLE FOR OPERATION
OUTSIDE OR IN HARSH ENVIRONMENTS. During the
warranty period, the manufacturer will, at its option, either
repair of replace products which prove to be defective.
shipment, when installed in accordance with the owner’s
manual in a clean, dry, interior home environment. THIS
AMPLIFIER IS NOT SUITABLE FOR OPERATION
OUTSIDE OR IN HARSH ENVIRONMENTS. During the
warranty period, the manufacturer will, at its option, either
repair of replace products which prove to be defective.
For warranty service or repair, this product must be
properly packed and returned to a service facility
designated by the manufacturer.
designated by the manufacturer.
Buyer shall prepay
shipping charges to the designated facility and the
manufacturer shall pay shipping charges to return the
product to buyer. However, Buyer shall pay all shipping
charges, duties and taxes for products returned to the
manufacturer from another country.
manufacturer shall pay shipping charges to return the
product to buyer. However, Buyer shall pay all shipping
charges, duties and taxes for products returned to the
manufacturer from another country.
The manufacturer does not warrant that the operation of
the product will be uninterrupted or error-free. The Buyer
must determine the suitability of the product for his or her
purposes.
must determine the suitability of the product for his or her
purposes.
LIMITATION OF WARRANTY
The foregoing warranty shall not apply to defects
resulting from improper or inadequate maintenance by
B u y e r , B u y e r - s u p p l i e d i n t e r f a c i n g , u n a u t h o r i z e d
modification or misuse, operation outside of the
environment specifications for the product including
inadequate ventilation, or improper site preparation,
installation, or maintenance.
B u y e r , B u y e r - s u p p l i e d i n t e r f a c i n g , u n a u t h o r i z e d
modification or misuse, operation outside of the
environment specifications for the product including
inadequate ventilation, or improper site preparation,
installation, or maintenance.
NO OTHER WARRANTY IS EXPRESSED OR
IMPLIED.
THE MANUFACTURER SPECIFICALLY
D I S C L A I M S T H E I M P L I E D W A R R A N T I E S O F
MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE.
MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE.
EXCLUSIVE REMEDIES
THE REMEDIES PROVIDED HEREIN ARE BUYER’S
S O L E
A N D
E X C L U S I V E
R E M E D I E S .
T H E
MANUFACTURER SHALL NOT BE LIABLE FOR ANY
DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES, WHETHER BASED ON
CONTRACT, TORT, OR ANY OTHER LEGAL THEORY.
DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES, WHETHER BASED ON
CONTRACT, TORT, OR ANY OTHER LEGAL THEORY.
SAFETY SYMBOLS
The following symbols are used throughout this manual
and in the product. Familiarize yourself with each of the
symbols and its meaning before servicing this amplifier.
symbols and its meaning before servicing this amplifier.
Instruction manual symbol. The product will be
marked with this symbol when it is necessary for
the user to refer to the instruction manual in order
to protect the unit against damage.
the user to refer to the instruction manual in order
to protect the unit against damage.
Indicates dangerous voltages are present. Be
extremely careful.
The CAUTION sign denoted a
hazard.
hazard.
It calls attention to a
procedure which, if not correctly
performed or adhered to, could
performed or adhered to, could
result in damage to or destruction of the amplifier.
Do not
proceed beyond a CAUTION sign until the indicated
conditions are fully understood and met.
conditions are fully understood and met.
The WARNING sign denotes a
hazard.
It calls attention to a
procedure which, if not correctly
performed or adhered to could
performed or adhered to could
result in injury or loss of life. Do not proceed beyond a
WARNING sign until the indicated conditions are fully
understood and met.
understood and met.
GENERAL SAFETY CONSIDERATIONS
THIS UNIT DOES NOT HAVE A POWERSWITCH;
HAZARDOUS VOLTAGES ARE PRESENT WITHIN THE
UNIT WHENEVERIT IS PLUGGED IN. This still applies
when the over-temperature thermostat opens, as it may
automatically reset at any time.
UNIT WHENEVERIT IS PLUGGED IN. This still applies
when the over-temperature thermostat opens, as it may
automatically reset at any time.
There are voltages and hot components at many points
in the amplifier which can, if contacted, cause serious injury.
Be extremely careful.
Be extremely careful.
Any adjustments or service
procedures that require operation of the amplifier out of its
enclosure should be performed only by trained service
personnel.
enclosure should be performed only by trained service
personnel.
3
Powered Subwoofer
ARC SUB
CONTROLS AND THEIR FUNCTION
1. Output Level - The Output Level adjustment
determines volume level strength.
2. Crossover Frequency - The Crossover Frequency
adjustment determines the highest frequency the
ARC SUB will reproduce. It allows a seamless
transition from the subwoofer to the satellite
speakers.
ARC SUB will reproduce. It allows a seamless
transition from the subwoofer to the satellite
speakers.
3. On (LED) - This LED will light green when the unit is
plugged in and is receiving signal. When in
standby mode the LED is red.
standby mode the LED is red.
4. Low Level Input - These left and right Line Level
Inputs are normally used when the
receiver/processor has line-level “pre-amp out ”
or “subwoofer out” jacks.
receiver/processor has line-level “pre-amp out ”
or “subwoofer out” jacks.
5. Fuse - Use only a slow-blo 1.0A 250V GMC fuse.
6. High Level Inputs - These High Level Inputs are for
receivers that do not have line-level “pre-amp out”
or “subwoofer out” jacks. When a pair of main or
satellite speakers are attached to the OUTPUT
terminals, frequencies below 180 Hz are attenuated
by the high-pass filter.
or “subwoofer out” jacks. When a pair of main or
satellite speakers are attached to the OUTPUT
terminals, frequencies below 180 Hz are attenuated
by the high-pass filter.
