JBL DS 10 (serv.man2) Service Manual ▷ View online
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
L
R
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
7
7
6
6
5
5
4
4
3
3
2
2
1
1
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.
1 0
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:
n
Receiver/amplifier is on and a source is playing.
n
Powered subwoofer is plugged in.
n
Check 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.
n
Review proper operation of your receiver/amplifier.
If there is low bass output, check the following:
n
Make sure the connections to the left and right
“Speaker Inputs” have the correct polarity (+ and –).
n
Make sure that the subwoofer is plugged into an
active electrical outlet.
n
Adjust the crossover point.
n
If you are using a Dolby* Digital/DTS
Ò
receiver or
processor, make sure that the subwoofer
adjustments on the receiver/processor are set up
correctly.
n
Slowly 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:
n
Receiver/amplifier is on and a source is playing.
n
Powered subwoofer is plugged in.
n
Check 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.
n
Review proper operation of your receiver/amplifier.
1 1
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
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
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.
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
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
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.
1 2
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
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