JBL DPS-12 Service manual
The JBL DPS-12 is a powerful subwoofer that delivers 250 watts of RMS power and features a 12-inch high-polymer laminate driver for deep, accurate bass. It has both line-level and speaker-level inputs, making it compatible with a variety of audio systems. With continuously variable low-pass and high-pass filters, you can customize the sound to your preference. The DPS-12 also includes a phase switch for precise alignment with your main speakers, and line-level outputs for connecting to an external amplifier or receiver.
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PSW-D112/DPS-12
Powered Subwoofer
SERVICE 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 E 7/2001
Amplifier/Subwoofer
Warning
PSW-D110/DPS-10
SAFETY INFORMATION
List of Safety Components Requiring
Exact Replacements
(all parts POWER AMP PCB except TR2)
Caution
This unit does not have a power switch. Hazardous voltages are present within the unit whenever it is plugged in.
Rev0
Rev1
Leakage/Resistance Check
(Rev0) only)
(Rev0) only)
WARNING! DO NOT
Critical Components
IMPORTANT SERVICE NOTES: When testing the PSW-D112/DPS-12 Series amplifier, a load must always be connected to the output terminals, whether the woofer, or a 4 to 8 ohm resistive load.
All AC powered test instruments (meters, oscilloscopes, etc.) must have a floating ground, i.e., be connected to an isolation transformer.
2
Amplifier/Subwoofer PSW-D112/DPS-12
TABLE OF CONTENTS
SAFETY INFORMATION .......................................................2
TABLE OF CONTENTS.........................................................3
GENERAL SPECIFICATIONS ...............................................3
DETAILED SPECIFICATIONS...............................................4
CONTROLS AND THEIR FUNCTION...................................6
OPERATION...........................................................................7
SPEAKER CONNECTIONS...................................................8
TROUBLESHOOTING .........................................................10
TEST SET UP AND PROCEDURE......................................11
TESTING PROCEDURE......................................................12
POWER AMP MODULE TESTING FLOW CHART............14
SERVICE BULLETIN JBL9903 Rev 1 - FEBRUARY 2001..15
SERVICE BULLETIN JBL2001-02 - FEBRUARY 2001........16
CABINET EXPLODED VIEWS ............................................17
AMPLIFIER EXPLODED VIEW ...........................................18
MECHANICAL PARTS LIST................................................19
PACKING EXPLODED VIEWS....................................20
Rev0 PCB (Component Side)......................................21
Rev0 PCB (Solder Side)..............................................22
PCB (Component Side) PREAMP Rev1,
PWRAMP Rev1............................................................23
PCB (Solder Side) PREAMP Rev1,
PWRAMP Rev1............................................................24
ELECTRICAL PARTS LIST (Rev0) .............................25
ELECTRICAL PARTS LIST Rev1 PCB.......................27
INTEGRATED CIRCUITS ............................................29
SCHEMATIC 1 of 3 (Rev0) .........................................30
SCHEMATIC 2 of 3 (Rev0) .........................................31
SCHEMATIC 3 of 3 (Rev0) .........................................32
PREAMP SCHEMATIC Rev1 ......................................33
POWERAMP SCHEMATIC Rev1.0 .............................34
POWERAMP SCHEMATIC Rev1.1 .............................35
NOTE: CERTAIN DRAWINGS AND CONNECTIONS WERE DEPICTED INCORRECTLY IN SOME EARLY COPIES
OF THE PSW-D112 AND DPS-12 OWNER'S MANUALS .
THEY INCLUDE:
1
. DRAWING OF RCA LINE LEVEL INPUT/OUTPUT JACKS ON PAGES 3, 4, & 5; ALL CHANNELS - RIGHT SIDE
SHOULD BE “LINE OUT”, LEFT SIDE SHOULD BE “LINE IN”.
2
. CONNECTION ON PAGE 4 OF OWNER'S MANUAL - SINGLE CABLE DIRECT INPUT (FOR DOLBY DIGITAL OR
DTS SURROUND); SINGLE CABLE FROM YOUR RECEIVER/PROCESSOR SHOULD CONNECT TO:
Rev0 version - THE “CENTER CHANNEL LINE IN” JACK ON YOUR SUBWOOFER.
Rev1 version - EITHER LEFT OR RIGHT INPUT JACK ON YOUR SUBWOOFER.
THOSE DRAWINGS ARE CORRECT IN THIS DOCUMENT, SEE PAGES 8 & 9.
GENERAL SPECIFICATIONS
Amplifier Power (RMS). . . . . . . . 250 watts
Driver 12" . . . . . . . . . . . . . High-Polymer Laminate
Inputs . . . . . . . . . . . . . . . Line Level and Speaker Level
Outputs . . . . . . . . . . . . . . Line Level and Speaker Level
Low-Pass Frequency . . . . . . . . Continuously variable from 60Hz – 180Hz
High-Pass Frequency . . . . . . . . Continuously variable from 60Hz – 180Hz when using line-level inputs
150Hz when using speaker-level inputs
Frequency Response . . . . . . . . 28Hz – low-pass crossover setting
PSW-D112
Dimensions (H x W x D) . . . . . . . 17-1/2 x 17-1/2 x 19-1/8"
(445 x 445 x 486mm)
Weight . . . . . . . . . . . . . . . 40 lbs/18.2 kg
DPS-12
22-1/8 x 17-1/2 x 17-1/2"
(562 x 445 x 445mm)
38 lbs/17.3kg
3
Amplifier/Subwoofer
LINE VOLTAGE
US 120vac/60Hz
EU 230vac/50-60Hz
Yes/No
Yes
Yes
DETAILED SPECIFICATIONS
Hi/Lo Line Nom.
108-132
120
207-264 230
Parameter
Amp Section
Type (Class AB, D, other)
Load Impedance (speaker)
Rated Output Power
THD@ Rated Power
THD @ 1 Watt
DC Offset
Damping factor
Specification Unit
D
8
250
0.3
0.5
<20
>90
Ohms
Watts
%
% mV-DC
DF
Test Limits Conditions
n/a n/a
150
1
0.8
10mV
>50
Unit
Vrms
Vrms
Nominal
1 input driven
22k filter
22k filter
@ Speaker Outputs
Input Sensitivity
Input Frequency
Line Input
Speaker/Hi Level Input
Signal to Noise
SNR-A-Weighted
SNR-unweighted
SNR rel. 1W-unweighted
(22k)
Residual Noise Floor
Residual Noise Floor
100
75
65
2
1.5
40
265
9.3
Hz mVrms
Vrms dBA dBr dBr mVrms
) mVrms(max
±2dB
±2dB
90
70
55
2.5
2
PSW-D112/DPS-12
Notes
Normal Operation
Normal operation, MOMS required
Notes
Class D Preferred...Sink required for Class
AB
Z-curve required
Peak power
160w (Power Bandwidth 30-100Hz) @ 120
VAC
Nominal Freq.
1 input driven
To Rated Power/ Vol @ Max 1 input driven: AP source Z = 600 ohms
To Rated Power/ Vol @ Max 1 input driven: AP source Z = 25 ohms
Relative to rated output
Relative to rated output relative to 1W Output
A-Weighting filter
22k filter
22k filter
Volume @max, using RMS reading DMM/VOM (or A/P) , BW <20KHz
Volume @max, w/ A/P Swept Bandpass Measurement (Line freq.+ harmonics) , BW<20Khz
Input Impedance
Line Input
Speaker/Hi Level Input
Filters
Low Pass (fixed or variable)
Low Pass filter (point or range)
Slope
Q
Subsonic filter (HPF)
Slope
Q
AV Boost
10K
5K ohms ohms
Variable
60-180
25
12
24
1
1
YES
Hz dB/Octave
Damping
Hz dB/Octave
Damping n/a n/a
±2dB n/a n/a
±2dB n/a n/a
—
Nominal
Nominal
-3dB Point
-3dB Point
0dBr = 1w @ 50Hz
4
Amplifier/Subwoofer
Limiter (yes/no)
THD at Max. Output Power
Features
Phase Switch (yes/no)
Volume pot Taper (lin/log)
Input Configuration
Line In (L,C,R,AC3,Mono)
Line Outputs (L,C,R)
Line-Out Adj. X-over
Spkr/Hi Level In
(L,C,R,mono)
Spkr Out: Hi Pass Filter yes
10
%
YES
LOG
—
—
L,R,C
L,R,C
130-240
L,R,C
100
—
Hz
—
Hz
—
—
Signal-Present LED
Signal-Present Input Freq.
Signal-Present Level
Signal-Present Bandwidth
Signal-Present Turn-on time
Auto Mute/ Turn-OFF Time
Power on Delay time
1k
0
15
Yes
100
2
0.1
Hz mV
Hz sec.
min.
sec.
functional ck. Maximum Output Power
Maximum THD as a result of limiting.
functional ck.
functional ck.
functional ck..
PSW-D112/DPS-12
Buffered Output / Pre-Volume control
Rear panel Variable xover n/a
5
Driven from zero ohms source impedance
Nominal
100Hz into Line Input w/ 1 ch. driven
Bi-Color LED (green=signal/ red=no signal)
200uF Series Cap on PCB
Signal-Present-LPF for noise immunity
Amp connected and AC on, then input signal applied
T before muting, after signal is removed
AC Power Applied
Transients/Pops
Signal-Present Transient
Turn-on Transient
Turn-off Transient
Efficiency
Stand-by Input Power
Power Cons.@rated power
Efficiency
Protection
Short Circuit Protection
Line Fuse Rating
5
500
500 mV-peak mV-peak mV-peak
25
245
102.04%
Watts
Watts
% yes
2
Amps n/a
2v-pp
4v-pp
@ Speaker Outputs
@ Speaker Outputs
@ Speaker Outputs
25
245
65
@ nom. line voltage
@ nom. line voltage
Relative to rated output functional ck.. Direct short at output
2
Type-T or Slo Blo
AC Line cycled from OFF to ON
AC Line cycled from ON to OFF
5
Amplifier/Subwoofer PSW-D112/DPS-12
PSW-D112/DPS-12 CONTROLS AND THEIR FUNCTION
1. Power LED - Will illuminate when the unit is turned on with the main power switch. This light will be RED when the unit is plugged in and not receiving a signal; when the PSW-D112 receives a signal, the light will cycle to
GREEN. If no signal is received after 10 – 15 minutes the light will cycle back to RED (standby) until a signal is present again.
2. Main Power Switch - Main Power Switch to the
PSW-D112/DPS-12; turn ON to energize the subwoofer.
Under normal operation, Power Switch may be left ON to utilize the Auto ON/OFF feature. For extended periods of non-use, or vacations, it is recommended that the subwoofer's Power Switch be turned OFF.
3. Level Control - The subwoofer Level Control,
(PSW-D112, located on the front panel, DPS-12, on the rear panel) adjusts the volume of the subwoofer relative to the rest of the system.
4. Video Contour - The subwoofer Video Contour
Control, (PSW-D112, located on the front panel) optimizes the subwoofer's performance for movie listening. When the video-contour switch is “on” the subwoofer's performance is tailored to deliver the impact and excitement of today's movies. The green LED will illuminate when the video-contour switch is on.
5. 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 150Hz) to main loudspeakers is desired through the Speaker Output Jacks.
6. Speak Out Jacks - Connected to main loudspeakers when the Speaker Input Jacks are used.
7. Phase Switch - Changes the subwoofer's output to be in phase or 180 degrees out of phase with the program material.
8. Line Input - Main Input connection to subwoofer
(preferred).
9. Line Output - When using the Line-Level Input jacks, these are connected to an external power amplifier or receiver to power the main loudspeakers with a high pass filter if desired.
10. Direct In - If you will be connecting the PSW-D112 to a receiver/processor containing a Dolby Digital or DTS surround technology, use this single RCA connection.
See the owner's manual for complete instructions.
11. Direct Out - (rev0 version only) This connection allows you to connect more than one PSW-D112 or
DPS-12 together; connect this output jack to the Direct
Input jack on the second subwoofer.
12. High Pass Control - Controls the roll-off point of the lowest frequency produced at the Line Level Output
Jacks.
13. Low Pass Control - Controls the roll-off point of the highest frequency the subwoofer will produce.
Front Panel (
PSW-D112
only)
level min max video contour
1
3
4
Rev0 version
of the
PSW-D112/DPS-12
Rev1 version
is shown in this illustration, which has Center channel input and output connectors; is missing these, along with the “Direct Out” RCA connector.
Rear Panel
SPKR In
L
C
R
SPKR Out
L
C
R
D i r e c t
L
I
N
E
I
N
180o 0o
90
Phase
O
U
T
L
I
N
E
L
C
R
Direct Out
120
150
60
90
120
180
150
60 180
11
12
5
7
8
9
10
13
Off
Power
On
6
2
6
Amplifier/Subwoofer PSW-D112/DPS-12
OPERATION
High-Pass Control
If you hooked up your subwoofer as shown in Speaker
Connection 4 on page 9. you also have the capability of adjusting the high-pass frequency. The High-Pass control determines the frequency at which the main speaker will start reproducing sounds. If your main speakers can comfortably reproduce some low-frequency sounds, also set this control to a lower frequency setting, between 50Hz –
100Hz. This will concentrate the subwoofer’s efforts to the ultradeep bass sounds, while your main speakers continue to reproduce the mid-bass information. If you are using smaller bookshelf speakers that do not extend to the lower bass frequencies, set the high-pass crossover control to a higher setting, between 125Hz – 180Hz. With this setting, your main speakers will not have the burden of reproducing any low-frequency sounds.
If you hooked up your subwoofer as shown in Speaker
Connection 1 on page 8, the high-pass frequency is fixed at
150Hz.
If you hooked up your subwoofer as shown in Speaker
Connection 2 or 3 on page 8 and 9, no high-pass control adjustment can be made from the subwoofer. Unless you receiver/amplifier incorporates a high-pass crossover, your main speakers will continue to get a full-range signal.
Final adjustment and blending of the low-pass and high-pass controls may evolve over several listening sessions. A good starting point would be to set both the lowand high-pass controls to the same frequency and adjust from that point.
Low-Pass Control
The Low-Pass 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 – 100Hz. 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 120Hz – 180Hz.
Phase Control
The Phase Control determines whether the subwoofer speaker’s piston-like action moves in and out with the main speakers, 0 , or opposite the main speakers, 180 . There is no correct or incorrect setting. Proper phase adjustment depends on several variables such as room size, subwoofer placement and listener position. Adjust the phase switch to maximize bass output at the listening position.
Remember, every system, room and listener is different.
There are no right or wrong settings; any setting you choose will result in excellent performance. Should you decide to fine-tune your system for optimum performance, be patient and trust your ears. It will be worth the effort involved to fully
“tweak” your system.
7
Amplifier/Subwoofer PSW-D112/DPS-12
SPEAKER CONNECTIONS
NOTE: The rear plate for the PSW-D112 is shown, which has the level control on the front panel. The DPS-12 has this level control on the rear panel (amplifier). In addition, the Rev0 version of the PSW-D112/DPS-12 is shown in these illustrations, which has Center channel input and output connectors; Rev1 version is missing these, along with the
“Direct Out” RCA connector.
1) If your receiver/amplifier has no subwoofer outputs or preamp outputs for the left, center and right channels.
See Figure 1.
RECEIVER/AMPLIFIER
SPEAKER OUTPUT
LEFT RIGHT
R
SPKR Out
L
C
R
SPKR In
L
C
r e
D i c t
N
E
L
I
I
N
180o 0o
90
60
90
60
Direct Out
120
150
180
High
Pass
120
150
180
Low
Pass
Phase
O
U
T
N
E
L
I
L
C
R
LEFT
SPEAKER
RIGHT
SPEAKER
2) If your receiver/amplifier has subwoofer outputs or preamp output jacks for the left and right channels.
See Figure 2.
SPKR In
L
C
R
SPKR Out
L
C
R
r e
D i c t
N
E
L
I
I
N
180o 0o
Direct Out
90
60
90
60
120
150
180
High
Pass
120
150
180
Low
Pass
Phase
O
U
T
N
E
L
I
L
C
R
RECEIVER/AMPLIFIER
SUBWOOFER OUT
MAIN SPEAKER OUTPUT
8
Amplifier/Subwoofer
If your receiver/amplifier has a single
(mono) subwoofer output or LFE output, connect the output using a “Y”-connector
(not included) to both Left or Right line-level inputs on the subwoofer. Plug the single male end of the “Y” connector into the receiver/amplifier, and connect the 2 interconnect cables to the Left and Right line-level inputs on the subwoofer.
If you will be connecting the
PSW-D112/DPS-12 to a receiver/processor containing a Dolby Digital or D.T.S. surround technology:
1. For the Rev0 version, connect the subwoofer or LFE output from your receiver/processor to the Center.
line-level input as shown in Figure 3b.
2. For the Rev1 version, (with no center channel input jack), connect the subwoofer or LFE output from your receiver/processor to EITHER Left or
Right line-level input jack with a single
RCA cable.
3. Set the “Low-Pass” control to the full clockwise 180Hz setting.
The connection labeled “Direct” (on Rev0 version of the subwoofer) is an output that allows you to connect several subwoofers, if your system contains more than one subwoofer.
If your receiver/amplifier has preamp output jacks and main input jacks for the left and right channels or you have a separate pre-amp/ processor and power amplifier.
See Figure 4.
This method of hookup can offer the highest level of performance for your complete loudspeaker system. The PSW-D112/
DPS-12 incorporates a variable high-pass crossover to a variable low-pass crossover. When hooked up as shown above, the subwoofer will limit the low-frequency information that is returned to your receiver/amplifier. Your receiver/ amplifier does not need to waste valuable power reproducing the low frequencies. In addition, since no low-frequency information is being sent to your main loudspeakers, they are able to reproduce mid and high frequencies with greater clarity
PSW-D112/DPS-12
Amplifier/Subwoofer PSW-D112/DPS-12
Receiver/amplifier is on and a source is playing.
Powered subwoofer is plugged in.
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.
Review proper operation of your receiver/amplifier.
Make sure the connections to the left and right
“Speaker Inputs” have the correct polarity (+ and –).
Make sure that the subwoofer is plugged into an active electrical outlet.
Adjust the crossover point.
Flip the Phase Control Switch to the opposite position.
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.
Slowly turn the level Control clockwise until you begin to hear the desired amount of bass.
Receiver/amplifier is on and a source is playing.
Powered subwoofer is plugged in.
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.
Review proper operation of your receiver/amplifier.
Slowly turn the level Control clockwise until you begin to hear the desired amount of bass.
Make sure that you have configured your receiver/processor so that the subwoofer/LFE output is on.
NOTE: When testing the PSW-D112/DPS-12 amplifier, a load must always be connected to the output terminals, whether the woofer, or a 4 to 8 ohm resistive load.
Amplifier/Subwoofer PSW-D112/DPS-12
7
Amplifier/Subwoofer PSW-D112/DPS-12
1 8
Amplifier/Subwoofer PSW-D112/DPS-12
2 1
Amplifier/Subwoofer PSW-D112/DPS-12
2 2
Amplifier/Subwoofer PSW-D112/DPS-12
2 3
Amplifier/Subwoofer PSW-D112/DPS-12
2 4
Amplifier/Subwoofer
Ref. # Part Number Description
Preamp Board
Capacitors
Qty Ref. # Part Number Description
PSW-D112/DPS-12
Qty
Diodes
Transistors
Integrated Circuit
Poweramp Board
Capacitors
Resistors
Diodes
Semiconductors
2 5
Amplifier/Subwoofer
Ref.#
Resistors
PartNumber Description Qty Ref.# PartNumber Description
PSW-D112/DPS-12
Q t y
SafetyInductors
High Level Input/OutputBoard
Capacitors
Resistors
Miscellaneous
Revisions
Date Issue Details
2 6
Diodes
Resistors
Poweramp Board
Capacitors
PSW-D112/DPS-12 ELECTRICAL PARTS LIST Rev1 PCB
Integrated Circuit
Transistors
Miscellaneous
Revisions/changes PSW-D112 Power Amp PCB
Later Rev Designator Early Rev
R5
R6
43.2K
4.7
R15
100K
R34
4.7K
Res Addition None
Cap Addition None
CW
D4
100 nf
1N4148
56.2K
47
None
10K
220k - solder from J2 to R34 on component side of PCB (part# 40407)
220 nf 250V - solder across +V and –V on power amp module, trace side of
PCB (part# 30532)
None
1N4938 (part# 50115)
2 7
Preamp Board
Capacitors
Integrated Circuits
Resistors
Amplifier/Subwoofer
+15V
SD
FR
I/P
+6V 15 v+
O/P
16
17
18
19
V-
20
21
22
23
24
25
26
GND
-15V
27
28
1
2
3
+6V v+
4
5
O/P
6
7
V-
8
9
+15V
10 SD
11
FR
12 I/P
13 GND
14 -15V
PSW-D112/DPS-12
- Power Amp module SAFETY PART
THE FOLLOWING PROCEDURES MUST BE FOLLOWED
WHEN INSTALLING NEW S53AMI/S64AMI AMP MODULES:
FAILURE TO FOLLOW ONE OR MORE OF THESE STEPS MAY
RESULT IN THE INSTANT DESTRUCTION OF THE MODULE WHEN
POWERED UP.
Align white indent marker on Amp Module with indent marker on main
PCB; alternately observe position of label on the top of the module; incorrectly replacing the Module 180 in the PCB slot will result in its destruction.
All AC powered test instruments (meters, oscilloscopes, etc.) must have a floating ground, i.e. be connected to an isolation transformer.
Align and position the Amp Module before soldering.
Attach the amp Module with the mounting screws powering up.
before soldering
Use only rosin-core or non-acid core solder; thoroughly de-flux the surfaces after soldering.
or
If the new S53AMI/S64AMI Amp Module has larger mounting hole(s) in the case, and the stock screws no longer will fit, and screws of the proper type cannot be obtained locally order:
(2) part# 60301S (screws)
(2) part# 60301N (nuts)
LM324 TL064) Quad Op Amp
14
13 12
4
11 10
3
9 8
1 2
1
3 4 5
2
6 7
1
2
3
4
(TLO 82) Dual Op Amp
-
A
+
+
B
-
8
7
6
5
Q4, Q5, Q10, Q11 TR1 Q3 Q12 TR2
3 Collector
1
2 3
2
Base
1 Emitter
1
2
3
3 Collector
1 Emitter
1
2
3
3 Collector
1 Emitter
2 9
Amplifier/Subwoofer PSW-D112/DPS-12
3 1
D1 - Early revisions had two 30v diodes in series. For replacement use single diode part# 50114
2
1
A B
3
4
5
A B
C D E
C D E
Schematic
PREAMP Rev1
F
F G
1
2
G
5
4
3
2
1
A B
3
4
5
PWRAMP Rev1.0
Schematic
A B
C D E
C D E
F
F
G
1
2
G
5
4
3
3
2
1
A B
4
5
Schematic
PWRAMP Rev1.1
A B
C D E
C D E
F
F
G
1
2
G
5
4
3

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