JBL ARC SUB10 User manual

JBL Consumer Products Inc.
250 Crossways Park Drive
Woodbury, N.Y. 11797
1-800-336-4JBL in the USA
A Harman International Company
Rev A 10/2000
ARC SUB10/DS-10
Powered Subwoofer
SERVICE MANUAL

SAFETY INFORMATION
Warning
Any person performing service of this unit will be exposed to
hazardous voltages and the risk of electric shock. It is
assumed that any person who removes the amplifier from
this cabinet has been properly trained in protecting against
avoidable injury and shock. Therefore, any service
procedures are to be performed by qualified service
personnel ONLY!
Caution
This unit does not have a power switch. Hazardous
voltages are present within the unit whenever it is
plugged in.
Before the amplifier is plugged in, be sure its rated voltage
corresponds to the voltage of the AC power source to be
used. Incorrect voltage could cause damage to the
amplifier when the AC power cord is plugged in. Do not
exceed rated voltage by more than 10%: operation below
90% of rated voltage will cause poor performance or may
shut the unit off.
Leakage/Resistance Check
Before returning the unit to the customer, perform a leakage
or resistance test as follows:
Leakage Current. Note there is no power switch on this unit.
When the power plug is plugged in, the unit is live. Connect
the unit to its rated power source. Using an ammeter,
measure the current between the neutral side of the AC
supply and chassis ground of the unit under test. if leakage
current exceeds 0.5mA, the unit is defective. Reverse the
polarity of the AC supply and repeat.
Resistance. Measure the resistance from either side of the
line cord to chassis ground. If it is less than 500k ohms, the
unit is defective.
WARNING! DO NOT return the unit to the customer if it fails
one of these tests until the problem is located and corrected.
Critical Components
All components identified with the IEC symbol
in the parts list and the schematic diagram
designate components in which safety can be
of special significance when replacing a
component identified with . Use only the
replacement parts designated in the parts list or parts with
the same rating of resistance, wattage or voltage.
List of Safety Components Requiring
Exact Replacements
F1 Fuse SLO BLO 0.63A 250V T type.
UL approved
PWRCORD SPT-2 or better with polarized plug, UL
approved wired with the hot side to fused
side. Use with factory replacement panel
strain relief only.
TRX Transformer. Use only factory replacement.
DBR Bridge diode. Use only factory replacement.
C1, 2 3300uF, 50V electrolytic filter caps. Be sure
replacement part is at least the same
working voltage and capacitance rating.
Also the lead spacing is important.
Incorrect spacing may cause premature
failure due to internal cabinet pressure and
vibration.
C6 10uF 50V ±20% Elect. Radial NP Safety Part
See Page 15 Service Bulletin
R29 470W0.25W ±5% METAL OXIDE Safety Part
S53AMI Power Amp module. Use only factory
replacement
CMC1 mc4438 Safety Part
L1 mc4436 Safety Part
2
Amplifier/Subwoofer ARC SUB10/DS-10

3
Amplifier/Subwoofer ARC SUB10/DS-10
TABLE OF CONTENTS
SAFETY INFORMATION ...............................................2
TABLE OF CONTENTS.................................................3
GENERAL SPECIFICATIONS .......................................3
DETAILED SPECIFICATIONS.......................................4
ARC SUB10/DS-10 CONTROLS AND
THEIR FUNCTION .........................................................6
CAUTIONS AND WARNINGS .......................................7
ARC SUB10/DS-10 BLOCK DIAGRAM ........................9
SPEAKER CONNECTIONS.........................................10
TROUBLESHOOTING .................................................11
ARC SUB10 / DS-10 TEST SET UP AND
PROCEDURE...............................................................12
ARC SUB10 / DS-10 POWER AMP
MODULE TESTING FLOW CHART............................13
SERVICE BULLETIN JBL9903 - APRIL 1999 ............14
SERVICE BULLETIN JBL2000-01
JANUARY 2000............................................................15
TROUBLESHOOTING TIPS AND SOLUTIONS
TO COMMON SERVICE PROBLEMS ........................16
CABINET EXPLODED VIEWS ....................................17
AMPLIFIER EXPLODED VIEW ...................................18
ARC SUB10/DS-10 PACKING EXPLODED VIEWS...19
ARC SUB10 Version 5 PCB........................................20
ARC SUB10/DS-10 Version 5.1 PCB..........................21
ARC SUB10/DS-10 ELECTRICAL PARTS LIST ........22
ARC SUB10/DS-10 INTEGRATED CIRCUITS &
TRANSISTORS ............................................................23
ARC SUB10/DS-10 SCHEMATIC................................24
GENERAL SPECIFICATIONS
Amplifier Power (RMS) ........100watts
Driver 10" ..............High-Polymer Laminate
Inputs ................Line Level and Speaker Level
Outputs ...............Speaker Level (only active if Speaker Level Inputs are used)
High-Pass Frequency .........High-Pass filter at 180Hz (only active if Speaker Level Inputs are used)
Frequency Response .........50Hz - 150Hz
(determined by crossover setting)
ARC SUB10 DS-10
Dimensions (HxWxD)........11-1/2 x 17-1/8 x 16-1/2" 14-1/4 x 14-1/4 x 16"
(292 X 435 X 419mm) (362 x 362 x 406mm)
Weight ................27lbs/12.3 kg 27 lbs/12.3kg

DETAILED SPECIFICATIONS
LINE VOLTAGE Yes/No Hi/Lo Line Nom. Unit Notes
US 120vac/60Hz Yes 108-132 120 Vrms Normal Operation
EU 230vac/50-60Hz Yes 207-264 230 Vrms Normal operation, MOMS required
Parameter Specificatio
nUnit QA Test Limits Conditions Notes
Amp Section
Type (Class AB, D,
other)
Dn/a n/a Class D Preferred...Sink required for Class
AB
Load Impedance
(speaker)
4Ohms n/a Nominal Z-curve required
Rated Output Power 100 Watts 1 input driven Peak power
THD @ Rated (RMS)
Power
0.3 %1 22k filter 50 Watts
THD @ 1 Watt 0.1 % 0.5 22k filter
DC Offset 10 mV-DC 20 @ Speaker Outputs
Damping factor 50 DF 40 Measured at amplifier board Measure at amp board THD < 0.1% 50 Watts
@ 50Hz
Input Sensitivity
Input Frequency 40 Hz 50 Nominal Freq.
Line input 100 mVrms ±2dB To Rated power/Vol @ Max Single input driven Un-Balanced GND
Zo=600
Speaker/Hi Level Input 2.6 Vrms ±2dB To Rated power/Vol @ Max Single input driven Un-Balanced GND
Zo=600
Signal to Noise
SNR-A-Weighted 100 dBA 70 relative to rated power A-Weighting filter
SNR-unweighted 80 dBr 70 relative to rated power 22k filter
SNR rel. 1W-unweighted 65 dBr 55 relative to 1W Output 22k filter
Residual Noise Floor 1 mVrms 2Volume @max, using DVM or A/P (BW=20 KHz)
Residual Noise Floor
1.5
mVrms(max)
2 Volume @max, w/ A/P Swept Bandpass
Measurement (Line freq.+ harmonics)
(BW=20 Khz)
Input Impedance
Line Input 10K ohms n/a Nominal Zin Minimum, (test frequency 1 Khz)
Speaker/Hi Level Input 4.7K ohms n/a Nominal Zin Minimum, (test frequency 1 Khz)
Filters
Speaker in LP 2nd order
variable
50-150 Hz ±10 -3db Point
Subsonic filter (HPF)
2nd order
25 Hz
Speaker out HP filter
Left & Rigth 200 Hz ±10 Speaker input - Spkr out 4 Ohms
Left & Rigth 100 Hz ±10 Speaker input - Spkr out 8 Ohms
4
Amplifier/Subwoofer ARC SUB10/DS-10

Limiter
THD at Max. Output
Power n/a n/a functional Maximum Output Power Maximum THD as a result of limiting.
Features —
Volume pot Taper
(lin/log)
LOG — functional
HP Speaker out functional Refer to filter section
Input Configuration
Line In & LFE YES — functional LR dual RCA jack
Spkr/Hi Level In YES — functional Spring type connector
Signal Sensing (ATO)
Auto-Turn-On YES functional Auto - on selection switch in Auto Bicolor LED (Green=signal/ red= No signal)
ATO Input test frequency 40 Hz functional “
ATO Line level in 5 mV functional "
ATO Level Speaker in 50 mV functional "
ATO Turn-on time 5ms functional Amp connected and AC on, then input signal
applied
Auto Mute/ Turn-OFF
Time
15 minutes 17 T before muting, after signal is removed Auto turn of time (T) must be 3>T<15
Minutes
Power on Delay time 0.1 sec. 5 AC Power Applied
Transients/Pops
ATO Transient 5 mV-peak 50
Turn-on Transient 2 Vpk-pk 2 @ Speaker Outputs AC Line cycled from OFF to ON
Turn-off Transient 2 Vpk-pk 2 @ Speaker Outputs AC Line cycled from ON to OFF
Efficiency
Efficiency 65 % 64 Nominal Line voltage 120 VAC / 230 VAC
Stand-by Input Power 15 Watts 18 @ nom. line voltage Auto turn of time (T) must be 3>T<15
Minutes
Power Cons. @ rated
power
76 Watts 80 @ nom. line voltage 75 Watts @ 4 Ohms nominal line voltage
Protection
Short Circuit Protection YES functional Direct short at output Amplifier should resume operation after short
circuit condition removal
Thermal Protection
YES
functional
@1/8 max unclipped Power IEC Noise
using driver load
Temperature rise in accessible metal parts
should not exceed 35K rise for 120v version
or 30K rise for European versions (refer to
requirements sheet).
Line Fuse Rating
US (120v) version Amps 0.6 Type-T or Slo Blo-250 V Internal fuse
EU Amps TBD Type-T or Slo Blo-250 V External fuse with UL/SEMKO rated holder
5
Amplifier/Subwoofer ARC SUB10/DS-10

1. Volume Control - adjusts the level of volume of the
subwoofer relative to the rest of the system.
2. Power LED - This light will be RED when the unit is
plugged in and not receiving a signal; when the unit
receives a signal, the light will cycle to GREEN. If no
signal is received after 5 minutes the light will cycle
back to RED (standby) until a signal is present again.
3. Crossover Frequency - This controls the highest
frequency the subwoofer will reproduce. It allows a
seamless transition from the subwoofer to the
satellite speakers. When the control is at the “50”
position, very few high frequencies will be heard.
This position is best suited to large main speakers.
For most applications, the control should be set
somewhere near the mid position. For listeners using
very small speakers, best results will be obtained
with the control at the “150” position.
4. Low Level Input Jacks - These left and right Line
Level Inputs are normally used when the receiver/
processor has line-level “pre-amp out ” or “subwoofer
out” jacks.
5. 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.
6
Amplifier/Subwoofer ARC SUB10/DS-10
Min
50
Max
150
Volume
Crossover
Frequency
R
R
L
L
Power
SPKR
IN
SPKR
OUT
Low
Level
In
4
3
1
2
5
Note: DS-10 controls
are shown here
ARC SUB10/DS-10 CONTROLS AND THEIR FUNCTION

1. TROUBLE SHOOTING BEFORE OPENING
Check connections, control settings, driver and other possible
external problems. If there is Output, determine if all controls
and Inputs function properly. Rotate Pots over full range while
applying lateral and vertical oscillating forces to locate possible
intermittent function. High Level Inputs should be tested
individually both differentially (signal from "-" to "+" with normal
output) and in common mode (signal from low level ground to
both "+" and "-" shorted together, giving virtually no output).
While passing a signal, corner drop the enclosure a few inches
to expose possible intermittent problems. Check woofer for
rubbing of voice coil or tears in cone or surround. Check
cabinet for loose extraneous articles which may have been
pushed into port.
2. REMOVING THE AMPLIFIER.
There are voltages and hot components at many points in
the amplifier which can, if contacted, cause personal injury.
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. Refer to PCB drawings for locations of hazards
and familiarize yourself with their locations before starting.
A. Remove the subwoofer grille.
B. Remove the (4) 1”Black PPH screws attaching the
woofer to the cabinet.
C. Remove the woofer, unplug the two connecting wires.
D. Remove the (8) ¾” screws black pph screws
attaching the ampifier assembly to the cabinet.
E. Remove the ampifier assembly.
F. For access to the input panel, first remove the three
outer screws. Remove knob and nuts from
potentiometers. Cut away the sealant securing the
cover to the faceplate. The input PCB should now
pull out completely.
3. TROUBLE SHOOTING AFTER REMOVAL
Verify AC plug is disconnected. See WARNINGS in section
2.
To prevent loose hardware from reducing safety spacings, it
is essential that all hardware be replaced in the same
manner as it was removed, with lock washers under all nuts,
proper torque on screws and thread locking sealer on the
transformer nuts.
If line core or strain relief are replaced, it is necessary to
seal them completely to panel with an approved conformal
coating to prevent air "whistling" through any openings from
woofer pressure.
To reduce the risk or electric shock and/or fire,
replace items as marked on schematic with the
safety marking only with the exact replacements
listed in the safety component list, page 2. If
exact replacements are not available, order them from the
factory or an authorized service center.
A. Check fuse F1. If blown visually check transformer for
discoloration, and large capacitors (C1, C2) for bulges
or venting. Check for shorts with an Ohmmeter,
(see schematic).
B. With ohmmeter, verify voice coil of woofer is 3.9
ohms, and windings of transformer are continuous.
C. Examine board and wiring for obvious damage,
broken or poorly soldered connections, or
discoloration.
D. Repair or replace items identified above.
E. For live power testing, attach a 4 ohm 100 watt
resistor to the output wires.
F. If the LED is not on, check for fuse continuity and
then for cold solder joints on CMC1 and bridge diode.
G. With a signal present at the input, the output to the
power amp is at pin #8 of U1. If the signal is not
present at pin 8, there is a problem with preamp
section. Most likely, a cold solder joint will be the
7
Amplifier/Subwoofer ARC SUB10/DS-10
CAUTIONS AND WARNINGS
BEFORE THIS AMPLIFIER IS PLUGGED IN, make sure its rated voltage corresponds to the voltage of the AC power
source to be employed. Failure to use the correct voltage could cause damage to the amplifier when the AC power
cable is plugged in. Do not exceed the rated voltage by more than 10%; operation below 90% will degrade
performance or cause the unit to shut off.

problem. Track back the signal path to locate
problem.
H. If signal present at pin 8, but still no sound, check
for cold solder joints on all power resistors, R4a and
R4b and the the power amp module. If C24 is
blown, C6 is not soldered or is defective. Check the
signal at R2. On the down signal side, the voltage
signal should be very small. If signal is similar on
both sides of R2, the amp module is likely defective.
I. If you hear a mechanical clicking noise from the amp
module, this indicates that the short circuit protection
has been engaged. Check that Q3, Q4 and Q5 are
soldered correctly. Also check that Q3 is not shorted
to power amp case.
J. If you have to replace the power module, be very,
very patient with the solder removal from this single
sided PCB. COMPLETELY REMOVE SOLDER
BEFORE TRYING TO REMOVE THE MODULE!
(See page 23)
K. Assembly notes. Top side soldering as below:
J5: solder both ends
J3: solder both ends
J1: solder both ends
R48: solder GND end
At junction of C7a/C7b: Pin to GND
Crossover pot Gnd wire from PDB pad to POT
barrel. (Only physical contact required between
pot body and faceplate).
After repair, inspect for possible safety hazards, including
loose hardware, missing lock washers, correct fuse and
lead dress of primary wires (these must be held in position
with cable ties so that they cannot touch secondary
components). With ohmmeter, check that panel is
connected to signal ground.
It is essential that the following safety insulation test be
performed prior to returning the Power SubWoofer to the
customer, using one of the following methods.
A) Insulation Resistance Test
With a 500VDC Insulation Tester, Check
insulation from the outer metal contact of the
RCA jack (chassis) to the line neutral of AC
cord. Resistance should be >100MW.
B) Hi-Pot Test
If a UL approved Hi-Pot tester is available, test
line & neutral of AC cord to outer shell of RCA
jack (chassis) at 1100VAC for 2 seconds.
Observe all of instrument manufacturer's
instructions and safety warnings in performing
this test.
Connect subwoofer system to a music source. Play at high
level while checking for air leaks around panel edge, driver,
panel jacks and controls, and voice coil problems such as
rubbing or loose turns. With the crossover "frequency" set
to 50Hz, very little of the voice content should be heard.
4. REASSEMBLY
Follow all disassembly instructions in reverse order. If the
input plate has been removed, it must be re-sealed with a
small bead of silicon seal or air leaks may result.
8
Amplifier/Subwoofer ARC SUB10/DS-10

ARC SUB10/DS-10 BLOCK DIAGRAM
9
Amplifier/Subwoofer ARC SUB10/DS-10
Summing
Circuit
Volume
Control
Equalization
Waveform
Recovery and
Fixed Low Pass
Crossover
Control
Power
Amplifier
Short Circuit
Protection
Woofer
LR
SPKR
In
SPKR
Out
High Level
Input
Low Level In
R
L
Low Level
Input
E
E
D
D
C
C
B
B
A
A
77
66
55
44
33
22
11

SPEAKER CONNECTIONS
Line Level
Note: Some receivers/amplifiers have
a single (mono) subwoofer output. In
this case, it is recommended that you
use a “Y”-connector (not included) to
connect to both right & left inputs and
maximize the subwoofers
performance.
Speaker Level
Note: When using the speaker-level
connections, the built-in high-pass
filter will also limit the low
frequencies being sent to the
satellite speakers. This means that
your satellites won't have to try to
reproduce the information the
subwoofer is playing.
10
Amplifier/Subwoofer ARC SUB10/DS-10
Min
50
Max
150
Volume
Crossover
Frequency
R
R
L
L
Power
SPKR
IN
SPKR
OUT
Low
Level
In
RIGHT
LOUDSPEAKER
LEFT
LOUDSPEAKER
MAIN SPEAKER OUTPUT
SUBWOOFER OUT
LEFT
LEFT
RIGHT
RIGHT
RECEIVER/AMPLIFIER
Min
50
Max
150
Volume
Crossover
Frequency
R
R
L
L
Power
SPKR
IN
SPKR
OUT
Low
Level
In
RIGHT
LOUDSPEAKER
LEFT
LOUDSPEAKER
MAIN SPEAKER OUTPUT
LEFT RIGHT
RECEIVER/AMPLIFIER
Note: DS-10 controls are shown here

TROUBLESHOOTING
If you used the high-level (speaker) inputs and
there is no sound from any of the speakers, check
the following:
nReceiver/amplifier is on and a source is playing.
nPowered subwoofer is plugged in.
nCheck all wires and connections between
receiver/amplifier and speakers. Make sure all wires
are connected. Make sure none of the speaker
wires are frayed, cut or punctured.
nReview proper operation of your receiver/amplifier.
If there is low bass output, check the following:
nMake sure the connections to the left and right
“Speaker Inputs”have the correct polarity (+ and –).
nMake sure that the subwoofer is plugged into an
active electrical outlet.
nAdjust the crossover point.
nIf you are using a Dolby* Digital/DTSÒreceiver or
processor, make sure that the subwoofer
adjustments on the receiver/processor are set up
correctly.
nSlowly turn the level Control clockwise until you
begin to hear the desired amount of bass.
If you used the line-level inputs and there is no
sound from the subwoofer, check the following:
nReceiver/amplifier is on and a source is playing.
nPowered subwoofer is plugged in.
nCheck all wires and connections between receiver/
amplifier and subwoofer. Make sure all wires are
connected. Make sure none of the wires are frayed,
cut or punctured.
nReview proper operation of your receiver/amplifier.
11
Amplifier/Subwoofer ARC SUB10/DS-10

General Function
UUT = Unit Under Test
1. Connect both right and left line level inputs (RCA) to signal generator and UUT. Use Y-cable if necessary from
mono source. VOLUME control should be full counterclockwise.
2. Turn on generator, adjust to 50mV, 50 Hz.
3. Plug in UUT; red LED should be ON. Turn VOLUME control full clockwise.
4. LED should turn Green; immediate bass response should be heard and felt from port tube opening.
5. Turn off generator, turn VOLUME control fully counterclockwise, disconnect RCA cables.
6. Connect one pair of speaker cables to either high level input terminal on UUT. Cables should be connected to
an integrated amplifier fed by the signal generator.
7. Turn on generator and adjust so that speaker level output is 2.0V, 50 Hz. Turn VOLUME control full clockwise.
8. Green LED should light, immediate bass response should be heard and felt from the port tube opening.
Sweep Function
1. Follow steps 1-4 above, using a sweep generator as a signal source.
2. Sweep generator from 20Hz to 300Hz. Listen to the cabinet and drivers for any rattles, clicks, buzzes or any
other noises. If any unusual noises are heard, remove driver and test.
Driver Function
1. Remove driver from cabinet; detach + and - wire clips.
2. Check DC resistance of driver; it should be 3.2 to 3.9 ohms.
3. Connect a pair of speaker cables to driver terminals. Cables should be connected to an integrated amplifier fed by
a signal generator and adjust so that speaker level output is 5.0V.
4. Sweep generator from 20Hz to 1kHz. Listen to driver for any rubbing, buzzing, or other unusual noises.
12
Amplifier/Subwoofer ARC SUB10/DS-10
ARC SUB10 / DS-10 TEST SET UP AND PROCEDURE
AMPLIFIER
CD PLAYER
PRE AMP
AC VOLT METER ( 6V )
ARC SUB10 / DS-10
UNDER TEST
LINE LEVEL
SPEAKER LEVEL
Min
50
Max
150
Volume
Crossover
Frequency
R
R
L
L
Power
SPKR
IN
SPKR
OUT
Low
Level
In
FROM LINE-LEVEL
SOURCE
SPEAKER OUTPUT
FROM AMPLIFIER

13
Amplifier/Subwoofer ARC SUB10/DS-10
ARC SUB10 / DS-10 POWER AMP MODULE TESTING FLOW CHART
No
Yes
No
Yes
No
Yes
No
Yes
No
No Yes
Yes
H
No
Yes
No
Yes
START
Check V+,
V-, +/-15V
voltage to
module
Check fuse
t ansfo me ,
CMC,
ectifie , C1,
C2
Check
switching
f equency
100KHz
+/-10%
~1Vpp
Check I/P of
module to
GND 0V D.C.
Powe up with
no signal I/P
LED RED
OK
OK
OK
OK
OK
OK
OK
OK
Check C12
and P e-AMP Check O/P to
module fo
80Vpp squa e
wave
measu e to
GND
Check L1,
L2, C6, C24
Check 6V to
module
measu e to V-
Replace
Module
Powe AMP
OK
END
Check D1,
R1, Q3, Q4,
Q5 and SCP
Check
t ansfo me ,
CMC,
ectifie , C1,
C2, D9, D10,
R16, R17
Check S/D
voltage to
module (5V)
measu e to V-
Check D6,
R9, R46
Resistance
check
between V+
V- and O/P
O/P to GND
should > 5K

SERVICE BULLETIN JBL9903 - APRIL 1999
To all JBL Service Centers This considered a Minor repair
Model: ARC SUB10 / DS-10
Subject: Check Solder Joints in Event of Failure
Some performance related complaints in the ARC SUB10 / DS-10 powered subwoofer may be caused by cold
Solder connections between the 28 pins of the Power Amp Module and the main circuit board. When
troubleshooting, failure to check these joints can result in erroneous conclusions or wasted time.
In the event you receive a ARC SUB10 / DS-10 Subwoofer with the complaints “Dead, or No Output, or
Motorboating (Oscillation)”, perform the steps listed below first before any further troubleshooting takes
place:
1) Unplug all cables, lay the subwoofer on a padded surface.
2) Remove all Philips screws around the outer perimeter of the amplifier faceplate.
3) Remove amplifier assembly; you should be able to remove the amplifier far enough out of the cabinet to
service it without removing the woofer wires.
4) Locate the Power Amp Module; it is the large gray component with a metal case. On the Solder side of the
circuit board are the 28 Solder connections to the Module.
5) Regardless of whether you can visibly see breaks in any of the connections or not, carefully re-Solder all 28
pin connections, adding 60/40 rosin core Solder. Take care not “bridge”any connections on the board with
Solder.
6) Inspect the Solder joints to the main filter capacitors C1 and C2 on the main PCB and re-Solder if needed.
7) Replace the amplifier assembly back into the cabinet; replace the screws.
8) Test the unit by applying a signal from a music source, adjust the volume to a moderate level and confirm the
original problem has been corrected.
14
Amplifier/Subwoofer ARC SUB10/DS-10

SERVICE BULLETIN JBL2000-01 - JANUARY 2000
To all JBL Service Centers Warranty labor rate: MINOR repair
Model: ARC SUB10 / DS-10
Subject: Failure of C6
In the event you receive a JBL subwoofer corresponding to one of the above models with the complaint “no output”and
capacitor C6 (10uf 50v NPE) is damaged in the amplifier, replace with the following part: JBL part# 30712 (10uf 100v NPE)
General reference for location only; not all parts or designators may conform to these drawings
It is also recommended following the repair that the instructions included in bulletin #JBL9903 are followed.
Models Serial number 120/230V Status Action
ARC SUB10 / DS-10 All serial numbers affected Replace if damaged Replace C6 with JBL part# 30712
15
Amplifier/Subwoofer ARC SUB10/DS-10

TROUBLESHOOTING TIPS AND SOLUTIONS TO COMMON SERVICE PROBLEMS
For models: ARC SUB 8, ARC SUB 10 TIP# JBLTT2000-01
Complaint:
How do you replace or service any of the front panel components on the Subwoofer faceplate for model ARC
SUB 10 ?
Probable Cause:
The High level Input terminals, potentiometers, RCA jack, and switch(es) are behind a sealed cover to protect the
air-tight integrity of the cabinet enclosure.
Solution:
1) Unplug all external cables from the subwoofer; place the cabinet on a padded surface.
2) Remove any subwoofer grille; remove the woofer from the cabinet. Detach the two connections from the
woofer terminals.
3) Remove all Phillips screws holding the amplifier to the cabinet; remove the amplifier.
4) Remove all knobs, nuts, and Philips screws from the outer control section of the amplifier faceplate.
5) Locate the sealed cover on the inside of the amplifier faceplate (see illustration); the bead of adherent must
be broken to remove the main PCB with front panel components from the plastic faceplate. This is most
easily accomplished by CAREFULLY using a box cutter, exacto knife, or similar sharp instrument. First scrape
all excess material from the three surfaces; then force the blade into the groove between the rear cover and
the faceplate. DO NOT attempt to remove the rear cover from the main PCB.
6) When enough material is removed, the main PCB with cover can be pulled away from the faceplate,
exposing the components.
7) After servicing, a bead of “silicon seal”or similar adherent must be applied to all surfaces where it was
removed. Reassemble the rest of the components in reverse order.
16
Amplifier/Subwoofer ARC SUB10/DS-10

17
Amplifier/Subwoofer ARC SUB10/DS-10
CABINET EXPLODED VIEWS
ARC SUB10 CABINET
EXPLODED VIEW
DS-10 CABINET
EXPLODED VIEW
SCREWS (4X)
SCREWS (4X)
SCREWS (4X)
WOOFER TRIM
RING #201060
10" WOOFER
#200500
10" WOOFER
#201000
KICKPLATE
with LOGO
#201070
GRILLE
#200110
GRILLE
#201010
GRILLE
RETAINER
CUPS (4)
#201080
GRILLE
RETAINER
CUPS (4)
#201080
CABINET
(NOT FOR SALE)
CABINET
(NOT FOR SALE)
AMP ASSEMBLY
(NOT FOR SALE)
AMP ASSEMBLY
(NOT FOR SALE)
SCREWS (8X) ARCSUB10 LABEL
#200160
DS-10 LABEL
#201150
SCREWS (8X)
TOREDUCETHERISKOFELECTRICSHOCK.DONOT
EXPOSETHISEQUIPMENTTORAINORMOISTURE
CAUTION
RISKOFELECTRICSHOCK
DONOTOPEN
TOREDUCETHERISKOFELECTRICSHOCK.DONOT
EXPOSETHISEQUIPMENTTORAINORMOISTURE
CAUTION
RISKOFELECTRICSHOCK
DONOTOPEN
~
120VAC
60Hz
110W
~
120VAC
60Hz
110W
DiscreteDigitalAMPLIFICATION
DiscreteDigitalAMPLIFICATION
ARCSUB8
ARC SUB 8
ARCSUB8
ARC SUB 8
SerialNo.XXXXXX-XXXXX
SerialNo.XXXXXX-XXXXX
JBLCONSUMERPRODUCTS,INC.
NORTHRIDGE,CA
MADEINCANADA
JBLCONSUMERPRODUCTS,INC.
NORTHRIDGE,CA
MADEINCANADA
LowLevelIn
LowLevelIn
R
R
L
L
L
L
R
R
Power
Power
SPKR
In
SPKR
In
SPKR
Out
SPKR
Out
50
50
Min
Min
150
150
Max
Max
Volume
Volume
CrossoverFrequency
CrossoverFrequency
NRTL
NRTL
LR110113
LR110113

18
Amplifier/Subwoofer ARC SUB10/DS-10
AMPLIFIER EXPLODED VEIW
E
E
D
D
C
C
B
B
A
A
77
66
55
44
33
22
11
Min
50
Max
150
Volume
Crossover
Frequency
R
R
L
L
Power
SPKR
IN
SPKR
OUT
Low
Level
In
Ref.#
Part # Description Qty
1 70170 #4x0.5" screws to secure input jacks 3
2 70171 #10 x 1" machine screw bolts for 4
transformer 4 per unit
3 70172 #10 keps nuts for transformer 4
4 70173 #6 x 0.5" screws for fuse PCB 2
5 A70301 Metal bracket mounted 1
on transformer
6 A70302 2
10 80108 Transformer #4340 SAFETY PART 1
11 80109 250V, 0.63A, T type slo blo fuse 1
12 80105 Power cord, 2 conductor SAFETY PART 1
13 80106 Fuse PCB complete with connectors 1
SAFETY PART
14 80107 Motherboard SAFETY PART 1
15 200603 ARCSUB10 Faceplate with labels 1
SAFETY PART
201003 DS-10
16 A70304 Air leak cover SAFETY PART 1
17 70305 Pwr cord strain relief SAFETY PART 1
18 108320 Dual RCA input jacks 1
19 High level input and output terminals 1
TRX
F1
Hum shield
Knobs
Main PCB
Faceplate with labels 1
SAFETY PART
108115
ARC SUB10/DS-10
Amplifier Assembly
Exploded View
2
18
6
6
1
19
15
16
14
5
10
3
4
13
11
17
12
DS-10 Shown

19
Amplifier/Subwoofer ARC SUB10/DS-10
ARC SUB10/DS-10 PACKING EXPLODED VIEWS
ARC SUB10
DECADE SERIES
DS-10
PACKING ARC SUB10
PACKING
DS-10
RUBBER FEET (4)
#101145
WARRANTY CARD
OWNER'S MANUAL
#201030 (120V)
#331993-001
RUBBER FEET (4)
#101145
WARRANTY CARD
OWNER'S MANUAL
#200130 (120V)
#331993-001
FOAM CORNER
PADS
FOAM CORNER
PADS
ARC SUB10
CARTON
#200120
CARTON
#201020
PLASTIC BAG
STYROFOAM
CORNERS (8)
PER BOX
DS-10
STYROFOAM
CORNERS (8)
PER BOX
PLASTIC BAG

20
Amplifier/Subwoofer ARC SUB10/DS-10
ARC SUB10 Version 5 PCB
E
E
D
D
C
C
B
B
A
A
77
66
55
44
33
22
11
PLAIN 5 - Component Side Trace
PLAIN 5 - Solder Side Trace Layer as viewed through the board
The PLAIN 5 PCB was used in ARCSUB10