JBL PSWD-112, DPS-12 Service manual

PSW-D112/DPS-12

Powered Subwoofer

SERVICEMANUAL

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 PSW-D110/DPS-10

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 personal 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 0.5A, 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

List of Safety Components Requiring Exact Replacements (all parts POWER AMP PCB except TR2)

F1 PWRCORD

TRX1 C1, 2

C6 (Rev0) 4.7uf 100V 80/-20% Electrolytic redial NP C6 (Rev1) 4.7uf 100V 80/-20% Electrolytic redial NP TR2 MPS A13 30V NPN(Darl) DBR Bridge Rect 200V Use only factory replacement. R1 10M 0.25W 5% carbon film

R4a/b/c 0.1 0.5W 5% metal film R9 3.3 5W 5% ceramic wirewound R15 100k 0.5W 5% carbon film

R16, 17 1.8k 5W 5% ceramic wirewound R33 (Rev0) only) 332 0.5W 5% carbon film R50 (Rev0) only) 332 0.5W 5% carbon film R52, 57 2.7k 5W 5% ceramic wirewound R61 3.9k 3W 5% carbon film S64AMI Power output module. Use only factory

Faceplate Faceplate. Use only factory replacement CMC1 Use only factory replacement L1 Use only factory replacement

Fuse PCB Use only factory replacement Main PCB Use only factory replacement

Fuse SLO BLO 1.25A 250V UL approved SPT-2 or better with polarized plug, UL

approved wire with the hot side to fused side. Use with factory replacement panel strain relief only.

Transformer. Use only factory replacement. 4700uF,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.

replacement

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.

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.

00465-2

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) ........250watts

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

Frequency Response ........28Hz – low-pass crossover setting

when using line-level inputs 150Hz when using speaker-level inputs

PSW-D112 DPS-12

Dimensions (HxWxD).......17-1/2 x 17-1/2 x 19-1/8" 22-1/8 x 17-1/2 x 17-1/2"

(445 x 445 x 486mm) (562 x 445 x 445mm)

Weight ...............40lbs/18.2 kg 38 lbs/17.3kg

Amplifier/Subwoofer PSW-D112/DPS-12

DETAILED SPECIFICATIONS

LINE VOLTAGE Yes/No Hi/Lo Line Nom. Unit Notes

US 120vac/60Hz

EU 230vac/50-60Hz

Yes

108-132

207-264

Parameter Specification Unit Test Limits Conditions Notes

Amp Section

Type (Class AB, D, other)

Load Impedance (speaker)

Rated Output Power

THD@ Rated Power

THD @ 1 Watt

DC Offset

Damping factor

D n/a

250

0.3

0.5

<20

>90

Ohms

Watts

mV-DC

Input Sensitivity

Input Frequency

Line Input

Speaker/Hi Level Input

265

9.3

Hz Nominal Freq. 1 input driven

mVrms

Vrms

120

230

n/a

150

0.8

10mV

>50

±2dB

Vrms Normal Operation

Vrms Normal operation, MOMS required

Class D Preferred...Sink required for Class AB

Nominal Z-curve required

1 input driven Peak power

22k filter

@ Speaker Outputs

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

160w (Power Bandwidth 30-100Hz) @ 120 VAC

Signal to Noise

SNR-A-Weighted

SNR-unweighted

SNR rel. 1W-unweighted (22k)

Residual Noise Floor

Input Impedance

Line Input

Speaker/Hi Level Input

Filters

Low Pass (fixed or variable)

Low Pass filter (point or range)

Slope

Subsonic filter (HPF)

Slope

AV Boost

100

1.5

10K

Variable

60-180

YES —

dBA

dBr

mVrms

mVrms(max )

ohms

dB/Octave

Damping

dB/Octave

Damping

2.5

n/a

±2dB

n/a

±2dB

n/a

Relative to rated output A-Weighting filter

Relative to rated output 22k filter

relative to 1W Output 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

Nominal

0dBr = 1w @ 50Hz

-3dB Point

Amplifier/Subwoofer PSW-D112/DPS-12

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

Signal-Present LED

Signal-Present Input Freq.

Signal-Present Level

Signal-Present Bandwidth

Signal-Present Turn-on time

Auto Mute/ Turn-OFF Time

yes

YES

LOG

L,R,C

130-240

L,R,C

100

Yes n/a

100

—

Hz Nominal 200uF Series Cap on PCB

sec. Amp connected and AC on, then input signal applied

min.

functional ck.

functional ck..

Maximum Output Power Maximum THD as a result of limiting.

Enabled w/Line/Spkr Input Select Switch

Buffered Output / Pre-Volume control

Var-HPF (Pot CCW and CW positions)

Enabled w/Line/Spkr Input Select Switch

8 ohm Satellite: 6dB/oct passive xover

100Hz into Line Input w/ 1 ch. driven

Signal-Present-LPF for noise immunity

T before muting, after signal is removed

Rear panel Variable xover

Driven from zero ohms source impedance

Bi-Color LED (green=signal/ red=no signal)

Power on Delay time

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

0.1

500

245

102.04%

yes functional ck..

sec.

mV-peak

Watts

Amps

n/a

2v-pp

4v-pp

245

AC Power Applied

@ Speaker Outputs

@ Speaker Outputs AC Line cycled from OFF to ON

@ Speaker Outputs AC Line cycled from ON to OFF

@ nom. line voltage

Relative to rated output

Direct short at output

Type-T or Slo Blo

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.

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 ( only)PSW-D112

level

min

max

video contour

Rev0 version PSW-D112/DPS-12

of the is

shown in this illustration, which has Center channel

input and output connectors; is missing

Rev1 version

these, along with the “Direct Out” RCA connector.

Rear Panel

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.

SPKR In

SPKR Out

Power

i r

180o0

I N E

I N

Direct Out

120

180

120

180

Phase

I N E

U T

150

High Pass

150

Low Pass

8 9

OnOff

Amplifier/Subwoofer PSW-D112/DPS-12

OPERATION

Crossover Adjustments

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.

Phase

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.

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.

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.

Figure 1

RECEIVER/AMPLIFIER

SPEAKER OUTPUT

LEFT

LEFT SPEAKER

RIGHT

RIGHT SPEAKER

SPKR In

SPKR Out

180o0

e c

Direct Out

120

180

120

180

Phase

O U

150

High Pass

Low Pass

2) If your receiver/amplifier has subwoofer outputs or preamp output jacks for the left and right channels. See Figure 2.

SPKR In

SPKR Out

Figure 2

180o0

Direct Out

120

180

120

180

Phase

O U

150

High Pass

Low Pass

RECEIVER/AMPLIFIER

SUBWOOFER OUT

LEFT

MAIN SPEAKER OUTPUT

RIGHT

LOUDSPEAKER

RIGHT

LOUDSPEAKER

LEFT

Amplifier/Subwoofer PSW-D112/DPS-12

3a) 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.

3b) 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.

SPKR In

SPKR Out

SPKR In

SPKR Out

180o0

e c

180o0

e c

Direct Out

Phase

I N E

O U

Phase

I N E

O U

Figure 3a

RECEIVER/PREAMPLIFIER

SUBWOOFER

OUTput/LFE

Figure 3b

RECEIVER/PREAMPLIFIER

SUBWOOFER

OUTPUT

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.

4) 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 in addition 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

SPKR In

SPKR Out

Figure 4

RECEIVER/AMPLIFIER

PRE

MAIN

OUT

180o0

Phase

e c

O U

Direct Out

120

150

High Pass

180

120

150

Low Pass

180

MAIN SPEAKER OUTPUT

RIGHT

LOUDSPEAKER

LEFT

CENTER

RIGHT

LEFT

LOUDSPEAKER

Amplifier/Subwoofer PSW-D112/DPS-12

TROUBLESHOOTING

If you used the high-level (speaker) inputs and there is no sound from any of the speakers, check the following:

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.

If there is low bass output, check the following:

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.

If you used the line-level inputs and there is no sound from the subwoofer, check the following:

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.

n Flip the Phase Control Switch to the opposite

position.

If you are using a Dolby* Digital/DTSÒreceiver 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.

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.

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