JBL PS-1400 Service manual

Performance Series

PS1400

Powered Subwoofer

PRELIMINARY

SERVICE MANUAL

JBL Consumer Products

250 Crossways Park Dr.

Woodbury, New York 11797

BASIC SPECIFICATIONS . . . . . . . . . . . . . . . . . . . .. . . . . .. . . . . . . . . .. .. . . . . . . .. .. . . . . . . . 2

DETAILED SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . .. .. . . . . . . .. .. . . . . . . . 3

CONTROLS & CONNECTIONS. . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . .. .. . . . . . . .. .. . . . . . . 4

TROUBLESHOOTING ……………………... . . . . . . . . . . . . . . . . . . .. . . . . . .. . .. . . . . . . . . …. 5

MECHANICAL/PACKAGING PARTS LIST . . . . . .. . . . . . . . . ……... . . . . . . . . . . . .. . .. . . . … 6

PASSIVE NETWORK SCHEMATIC. . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . ………….. .7

BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . .. . .. .. . . . . . . ... 8

PCB DRAWINGS. . . . . . . . . . . …. . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . .. . .. .. . . . . . . ...9

ELECTRICAL PARTS LIST. . . . . . . . . . . . . . . . . . . . . .. …….. . . . . . . . .. .. . . . . . . .. .. . . . . . ..12

SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ……………………………..16

PS1400 Powered Subwoofer

CONTENTS

General specifications

Amplifier Power Output 400 Watts Sensitivity (2.83V/1m) 91dB Frequency Response (–6dB) 28Hz to 130Hz

(-3dB) 30Hz to 130Hz Crossover Frequency 130Hz Low-Frequency Transducer LE14H-3 14" Aquaplas™-cone woofer Dimensions (H x W x D) 19" x 20" x 15" (483mm x 508mm x 381mm)

Plus grille and spike feet

Weight 80 lb (36kg)

JBL continually strives to update and improve existing products, as well as create new ones. The specifications and details in this and related JBL publications are therefore subject to change without notice.

PS1400 SUB Amplifier Detailed Specs

Limits

Rated Output Power (120VAC)

1 Watt output , LF level control FCCW

mVrms(max)

Normal Mode LP 3rd Order

Limiter

Temperature rise should not exceed 35K rise for

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

Parameter Specification Unit QA Test

Type (Class AB, D, other) D n/a D Bridge amplifier, None of the speaker outputs

Load Impedance (speaker) 6 Ohms 6

THD @ Rated Power 0.3 % 1 THD @ 1 Watt 0.1 % 0.3 DC Offset 100 mV-DC 100 Damping factor >40 DF 23 200 Watts into 6 Ohms, measured at speaker

Input Sensitivity

Input Frequency 60 Hz LFE input 1.50 Vrms ±2dB 250 Watts into rated impedance load Normal Mode SYSTEM INPUT 1.10 Vrms ±2dB 1 Watt output , LF level control FCW Normal Mode SYSTEM INPUT 3.47 Vrms ±2dB

Signal to Noise

SNR-No Filter 86 dBr 70 relative to rated power No filter 500 KHz BW AP SNR-A-Weighted 95 dBA 80 relative to rated power A-Weighting filter SNR-unweighted 95 dBr 80 relative to rated power 22k filter SNR rel. 1W-unweighted 70 dBr 60 relative to 1W Output 22k filter Residual Noise Floor 1 mVrms 2 Volume @max, using RMS reading

Residual Noise Floor 1.5

Input Impedance

Filters

-3dB Point

Separated mode LP 3rd Order -3db Point

Subsonic Filter -3dB point Fixed Hz 20.5 ± 2 Ref level 0dB ref at 60 Hz Normal

US 120vac/60Hz Yes 108-132 120 Vrms Normal Operation

EU 230vac/50-60Hz Yes 207-264 230 Vrms Normal operation, MOMS required

Conditions Notes

must be connected to GND at any time.

250 Watts 240 Nominal Input voltage , unit without limiter must

be able to provide output power levels in the range of 350 Watts

Normal Mode

DMM/VOM (or A/P) BW=20 Khz.

2 Volume @max, w/ A/P Swept

Bandpass Measurement (Line freq.+ harmonics) (BW=20 Khz)

Low Level input(LFE) 20K Ohms n/a Nominal

Speaker/Hi Level Input 10K Ohms n/a Nominal

Fixed-selectable Hz 100 ± 2 Front panel switch to Normal mode

Reference level 0dB @ 60 Hz Normal mode

Fixed-selectable Hz 280 ± 2 Front panel switch to Separated

Reference level 0dB @ 60 Hz, when EQ switch in Normal mode

mode

THD at Max. Output Power n/a n/a functional Maximum Output Power Maximum THD as a result of limiting. Must be

Signal Sensing (ATO)

Auto-Turn-On (yes/no) YES functional ATO Input test frequency 60 Hz functional " ATO Level LFE Input 6 mV functional " Maximum acceptable level. ATO Level Speaker in 184 mV functional " Maximum acceptable level. ATO Turn-on time 1 sec. functional Amp connected and AC on, then

input signal applied

Auto Mute/ Turn-OFF Time 15 Minutes 15 T before muting, after signal is

removed

Power on Delay time 3 sec. 4 AC Power Applied

Transients/Pops

ATO Transient 5 mV-peak n/a @ Speaker Outputs Turn-on Transient 50 mV-peak 2V-pp @ Speaker Outputs AC Line cycled from OFF to ON Turn-off Transient 50 mV-peak 2V-pp @ Speaker Outputs AC Line cycled from ON to OFF

Efficiency 70 % 65 Nominal Line voltage 120 VAC

15 Watts 18 @ nom. line voltage

Power Cons. @ rated power 425 Watts 462 @ nom. line voltage 300 Watts @ 6 Ohms nominal line voltage

Protection

Short Circuit Protection YES functional Direct short at output Amplifier should resume operation after short

Thermal Protection YES functional @1/8 max unclipped Power at 1.06

times the input voltage

DC Offset Protection YES - DC present at Speaker Out leads

Line Fuse Rating

USA-Domestic 4 Amps Type-T or Slo Blo-250 V EU 2 Amps Type-T or Slo Blo-250 V External fuse with UL/SEMKO rated holder

lower than 10%

Auto turn of time (T) must be 5 > T < 15 Minutes

circuit condition removal

domestic version or 30K rise for European versions. PROTECTION IS SET FOR ABNORMAL OPERATING CONDITIONS

Subwoofer Controls PS1400

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On/Auto Switch – When left in the “Auto” position, the PS1400 subwoofer will automatically turn on or go into standby mode, depending on whether it detects an audio signal. When no signal is being sent, the PS1400 will remain in standby mode. When it senses an audio signal, it will automatically turn itself on and begin playing. If the PS1400 does not sense a signal for about twenty minutes, it will switch itself into standby mode. When this switch is left in the “On” position, the PS1400 will remain on, whether or not program material is playing.

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LF Crossover Switch – This switch is used to engage the PS1400’s internal crossover when it is stacked with the PT800 tower module, and when no external crossover is being used. In the “Normal” position, the internal crossover is engaged, and provides an electronic 130Hz crossover for the subwoofer which precisely matches the passive 130Hz crossover point of the output terminal to the PT800. The crossover is precisiondesigned to create a smooth, integrated floorstanding speaker system when the PS1400 and PT800 are stacked.

In the “Separated” position, the PS1400 provides an electronic

300Hz rolloff for the

subwoofer,

which should be augmented by the low-pass crossover in the external audio/video receiver or processor. In this mode, the PT800, whether or not it is

stacked with the PS1400, should be given only a highpassed amplifier signal. That signal should be crossed over at 80Hz.

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LF Level Control – This control allows you to adjust the level of the subwoofer within a range of +/– 5dB. Start with the control positioned at 0dB, which is flat (neutral bass level). If bass response is unsatisfactory, due to either your room acoustics or as a matter of taste, experiment with this control until the desired bass level is achieved. This control only affects all information being received by the speaker-level input.

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Polarity (Phase) Switch – Use the “Normal” position whenever the PS1400 and PT800 are stacked and the internal crossover is used. It should also be used when an external crossover is used and all amplifier channels are in phase.

The “Reverse” position may be used when the PS1400 and PT800 are separated, and due to wave cancellation, bass response is improved in this position. “Reverse” may also be selected when different amplifiers are used that have different polarity configurations.

PERFORMANCE SERIES

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

“WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.” “AVERTISSEMENT: POUR PRÉVENIR LES RISQUES D’INCENDIE OU DE CHOC ELECTRIQUE, EVITER D’EXPOSER CET APPAREIL A LA PLUIE OU A L’HUMIDITE.”

MANUAL

AUTO

ON/OFF

SEPARATED

NORMAL

-2 0

-5 5

LF CROSSOVER

REVERSE

NORMAL

MIN MAX

– +

POLARITY

OFF

POWER

LFE LEVEL

SYSTEM INPUT

LFE /SUBWOOFER

INPUT

LF LEVEL

NRTL/C CSA 22-2 UL 1492

PN 336609-001

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LFE Level Control – This control only affects the signal sent to the LFE input. Adjust the LFE level by starting with the level controls on both PS1400 modules in the Minimum position. With 5.1, 6.1 or 7.1 source material playing, advance the LFE Level controls on both PS1400s slowly until the desired amount of effects channel is present. The normal position for this control is full clockwise, with LFE adjustments being made via the level adjustments on your processor. We have provided this control because the LFE output level of AV receivers and processors can vary from manufacturer to manufacturer.

If you are using the third or fourth configurations, where

the main speakers are configured as “Small” and all bass information is being sent to the LFE inputs of the PS1400s, the LFE Level control will operate on all low- frequency information, and not just for the .1 channel effects.

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LFE/Subwoofer Input – This jack accepts either an LFE or line-level output from the receiver or processor.

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System Input – These binding posts accept a fullrange, amplified (speakerlevel) output from the receiver or amplifier. This input should be used whenever the PS1400 and PT800 modules will be stacked and the internal crossover used to form an integrated floorstanding speaker system. This input

should be used in that configuration even if the LFE input will also be used.

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Power – This is the main power switch, which must be turned on for the amplifier and electronic internal crossover to function. If you will be away from home for an extended period of time, or if the PS1400 will not be used, turn this switch off to conserve electricity.

TROUBLESHOOTING

If there is no sound:

• Check that receiver/amplifier is on and a sourc e is playing.

• Check that the PS1400 is plugged in and its Power switch (8) is switched on.

• Check all wires and connections between receiver/amplifier and PS1400. Make sure all wires are

connect ed. Make sur e none of the speaker wires are frayed, cut or punctured.

• Review proper operation of your receiver/amplifier.

If there is low (or no) bass output:

• Make sure the connections to the left and right “Speaker Inputs” have the correct polarity (+ and –).

• Make sure the PS1400 is plugged into an active electric al outlet.

• Make sure the Power switch (8) is on.

• In Dolby Digital or DTS modes, make sure your receiver/processor is configured so that the subwoofer

and LFE output are enabled.

• Adjust the Polarity switch (4) if the PS1400 and PT800 are not stacked, or if they are stacked but

an external crossover is being used.

• Adjust the LF Level control (3).

• If the LFE input is in us e, adjust the LFE Level control (5).

JBL PS1400 MECHANICAL/PACKAGING PARTS LIST

Description Part Number Qty

PS1400 CABINET (Black, Beech, Cherry) Not For Sale 1 AMPLIFIER ASSEMBLY Not For Sale 1 FRONT GRILLE 336605-001 1 14” WOOFER LE14-H, DCR = 6.0 Ω ±10% 336321-001 1 WOOFER GASKET 335651-001 1 PORT TUBE 335652-001 2 GRILLE CUP 333249-001 4 TRIM RING 335696-001 1 TRIM RING GASKET 336594-001 1 COVER PLATE 336597-001 1 COVER PLATE GASKET 336598-001 1 LOGO 335470-002 1 LOGO PLATE 336599-001 1 CROSSOVER NETWORK 336603-001 1 LED ASSEMBLY 335650-001 1 ALLEN WRENCH 336602-001 1 MOUNTING PILLAR 336596-001 2 SHORTING STRAP 336617-001 2 FOOT 301612-001 4 OUTER CARTON 336606-001 1 END PAD, TOP/BOTTOM 336607-001 2 OWNER’S MANUAL 336608-001 1 SAFETY SHEET 337344-001 1 FOOT INSTRUCTION SHEET 337546-001 1 SURVEY CARD 331384-001 1 WARRANTY CARD 331993-001 1

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