Harman JBL SUB 550P User manual

SUB 550P / 230
Amplifier/Subwoofer
SERVICE MANUAL
JBL Consumer Products
8500 Balboa Blvd.
Northridge, CA. 91329
Released 2012 Rev0 01/2012
Discontinued XXXX

- CONTENTS -
BASIC SPECIFICATIONS…………………………….….……………..2
DETAILED SPECIFICATIONS………………………………………….3
PACKAGING…………………………..…………………….……………5
CONTROLS/CONNECTIONS..…… …………… …………..……….. 6
OPERATION………….…………………………..……….….………….8
TEST SETUP AND PROCEDURE………….……………………….…9
EXPLODED VIEW………………………….…………………………...10
230V BLOCK DIAGRAM..……………….…………………………..….11
DETAILED TROUBLESHOOTING..…………………..………… ……13
230V ELECTRICAL PARTS LIST ……….…….…….………………..14
INTEGRATED CIRCUIT/TRANSISTOR PINOUTS….…….………...21
PCB DRAWINGS………………..…………….………………………...22
230V SCHEMATICS.……….………………………………….……..…33
SUB 550P BASIC SPECIFICATIONS
Low-frequency transducer: 10" (250mm) PolyPlas cone, cast basket
Enclosure type: Sealed (forward-firing)
Amplifier power: 300 watts (RMS); 500 watts (peak)
Frequency response: 27Hz – 150Hz
Audio controls: Volume level, crossover frequency, phase
Connections: RCA line-level and LFE inputs
Power requirement: 120V, 60Hz (US); 220V – 230V, 50Hz/60Hz (EU)
Power consumption: <6W (120V) standby
360W (3.8A @ 120V) maximum
<0.55W (230V) standby
395W (2.1A @ 230V) maximum
Dimensions (W x H x D): 17-1/2" x 14-29/32" x 14-31/32"
(444mm x 379mm x 380mm)
Weight: 50 lb (23kg)
Occasional refinements may be made to existing products without notice but will always meet or exceed original
specifications unless otherwise stated
SUB 550P / 230
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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 207-253 230 Vrms Normal operation, MOMS required
Asia 100vac/50-60Hz No 90-110 100 Vrms Normal Operation
Parameter Specification Unit QA Test Limits Conditions Notes
Amp Section
Type (Class AB, D, other) D n/a n/a
Load Impedance (speaker) 4 Ohms n/a Nominal
AVG System impedance 10.8 Ohms n/a AP Computed BW from 20 to 500Hz Refer to AP Graph
Rated Output Power 250 Watts 220
AVG Peak voltage 45.8 Vpk Reference 170mV driven into a single input
Average PK voltage, 3/20 Cycles 50 Hz, Driven
6dB above its input sensitivity , rated impedance
THD @ Rated Power 0.5 % 122K filter+AUX-0025
THD @ 1 Watt 0.2 % 0.3 22K filter+AUX-0025
DC Offset 10 mV-DC 50 @ Speaker Outputs
Damping factor >50 DF 20
Measured at amplifier board 90% o
f
full power
Measured at the speaker cable. 225 Watts @
THD < 0.1 % @ 50 Hz
Input Sensitivity
Input Frequency 50 Hz 50 Nominal Freq.
L&R 5.6 mVrms ±1dB To 1 Watt, Ap Zo=25 Single input driven
LFE input 5.6 mVrms ±1dB To 1 Watt, Ap Zo=25 Single input driven, LFE switch ON
System Gain 51 dB Reference Single input driven Normal or LFE mode
Signal to Noise
SNR-A-Weighted 80 dBA 75 relative to 1W-Inputs terminated A-Weighting filter
SNR-unweighted 70 dBr 65 relative to 1W-Inputs terminated 22K filter
Residual Noise Floor <2.0 mVrms(max) 2.5
Volume @max, w/ A/P Swept
Bandpass Measurement (Line
freq.+ harmonics) (BW=20 KHz)
Line level inputs must be terminated using
1KOHM
Input Impedance
Line Input (L, R,LFE) 5.5K ohms n/a Nominal
Filters
LP filter Variable 50-150 Hz ± 10 4th Order variable Refer to AP curves
Subsonic filter (HPF) 2nd Ord
e
Fixed F=32Hz,Q=0.925 Refer to AP curves
Friend circuit Fixed F=59Hz,Q=3.5, Av=-1dB Refer to AP curves
LFE Low pass Fixed 200>LP-LFE<500 Refer to AP curves
Limiter
THD at Max. Output Power 13 % functional
Drive unit 6dB above the required
level to obtain full power
Approximately 208mV Maximum THD as a result of limiting.
Features --
Volume pot Taper (lin/log) LOG -- functional A Taper
Phase switch 0-180 deg functional
LP Filter defeat switch YES functional Disables LP filter, LFE Mode
LED Indicator YES functional
Bi-color LED loacated at the amplifier panel, Red
Standby, Green-On
Input Configuration
Line In (L,R) or LFE YES -- functional Dual RCA jack, For LFE use L or R
Signal Sensing (ATO)
Auto-Turn-On (yes/no) YES functional
ATO Input test frequency 50 Hz functional "
ATO Level LFE Input 2 mV functional " Maximum acceptable level.
ATO Turn-on time 5 ms functional
Amp connected and AC on, then
input signal applied
Auto Mute/ Turn-OFF Time 5-15 minutes 5-15
T before muting, after signal is
removed
Auto turn of time (T) must be 5 > T < 15
Minutes
Power on Delay time 3 sec. 4AC Power Applied
Transients/Pops
ATO Transient 0.5 V-peak 0.5V @ Speaker Output
Amplifier activated by signal presence at the
Line input
Turn-on Transient 0.5 V-peak 0.8V @ Speaker Output AC Line cycled from OFF to ON
Turn-off Transient 0.5 V-peak 0.8V @ Speaker Output AC Line cycled from ON to OFF
Detailed Specifications
SUB 550P / 230
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Parameter Specification Unit QA Test Limits Conditions Notes
Efficiency & Consumption
120V
Efficiency 65 % 65 Test conducted at rated power 245WNominal Line voltage
Efficiency at 1/8 of rated powe 52 % 50 Test conducted at 31.25 WRMS Nominal Line voltage-Rated impedance 4 Ohms
Standby input power 120VAC 5.5 Watts 6.5 @ nom. line voltage 120VAC-60Hz Nominal Line voltage LED=>RED
Idle input power 11 Watts 13 @ nom. line voltage 120VAC-60Hz
Maximum allowable input power under nominal
Input voltage and frequency, HOT or COLD
operation. LED GREEN no signal applied
Power Cons. @ rated power 358 Watts 384 @ nom. line voltage 120VAC-60Hz 250 Watts @ 4 Ohms nominal line voltage
Input Current @ rated power 3.8 ARMS Reference @ nom. line voltage 120VAC-60Hz
Efficiency & Consumption
230VAC
Efficiency 65 % 62.5 Test conducted at rated power 250WNominal Line voltage
Efficiency at 1/8 of rated powe 52 % 50 Test conducted at 31.25 WRMS Nominal Line voltage-Rated impedance 4 Ohms
Standby input power 230VAC 0.5 Watts 0.55 230VAC, 50-60Hz Nominal Line voltage LED=>RED
Idle input power 15 Watts 16 @ nom. line voltage and Frequency
Maximum allowable input power under nominal
Input voltage and frequency, HOT or COLD
operation. LED GREEN no signal applied
Power Cons. @ rated power 393 Watts 400 @ nom. line voltage and Frequency 250 Watts @ 4 Ohms nominal line voltage
Input Current @ rated power 2.14 ARMS Reference @ nom. line voltage and Frequency
Protections
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 at 1.06
times the input voltage
Temperature rise in accessible metal parts
should not exceed 35K rise for domestic version
or 30K rise for European versions (refer to
requirements sheet).
DC Offset Protection YES -DC present at Speaker Out leads
Design must insure no Offset at the speaker
output under any operating condition including
abnormal operation
Line Fuse Rating
USA-Domestic 3.15 Amps 3.15 Type-T or Slo Blo-250 V, 3AG Type Internal fuse with UL/SEMKO rated holder
EU 2.5 Amps 2.5 5x20mm Type-T-250 V, Low
Breaking capacity Internal fuse with UL/SEMKO rated holder
Transformer
Flux Density <12.5 KGauss n/a @ Nom. line voltage No Audible hum/buzz or excess idle current
Power losses 4.65 Watts Reference 120VAC-60Hz
Magnetizing current 0.044 Amps Reference RMS 120VAC-60Hz
All Agency Approvals YES n/a Required per UL/CSA/SEMKO
Standards Refer to "Requirements" sheet
Other Parameters/Notes:
1. Limiter circuit response must be clean sounding with no apparent pops, noises, or pumping.
2. Plate dimensions not to exceed 11.81"H x 7.87"W and the plate must be airtight with no possibility of air leaks (plastic cover required).
3. Volume control should be at the input buffer stage in order to lessen the possibility of clipping the input section with highly dynamic audio material.
4. ALL SPECS SHOULD BE MEASURED AT NOMINAL LINE VOLTAGE.
Rev-00 July-12-2011, Eng-reference sample
SUB 550P / 230
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Item Part Number Description Qty
1 Not for Sale Drier 2
2 400-000-10403-E Carton BK (230V) 1
400-000-10404-E Carton CH (230V) 1
3 Not for Sale Serial number label 1
4 Not for Sale Date Label 1
5 430-002-05495-E EPE bag 1
6 431-000-07533-E Top-EPE 1
7 431-000-07534-E Bottom-EPE 1
8 152-V60201A01-E Power cord (230V) 1
9 165-045801100-E Wire CU+PVC RCA 1
10 322-FE-05033-E Spike 1
11 visit www.jbl.com Owner's Manual 1
Packaging (BK, CH)
SUB 550P / 230
5

SUBWOOFER REAR-PANEL CONTROLS AND CONNECTIONS
Phase switch: This switch determines whether the subwoofer driver’s
piston-like action moves in and out in phase with the system’s other
speakers. If the subwoofer were to play out of phase with the other speak-
ers, the sound waves from the other speakers could partially cancel out
the sound waves from the subwoofer, reducing bass performance and
sonic impact. This phenomenon depends in part on the placement of all
the speakers relative to each other in the room.
Input Mode switch: When this switch is in the “Normal” setting, the input
signal from the Line In connectors is active. When this switch is in the
“LFE” setting, the input signal from the LFE In connector is active, and the
subwoofer’s internal crossover is bypassed.
Level control: Use this control to adjust the subwoofer’s volume. Turn the
knob clockwise to increase the volume; turn the knob counterclockwise to
decrease the volume.
Crossover control: This control determines the highest frequency
at which the subwoofer reproduces sounds. The higher you set the
Crossover control, the higher in frequency the subwoofer will operate and
the more its bass will “overlap” that of the system’s other speakers. This
adjustment helps achieve a smooth transition of bass frequencies between
the subwoofer and the other speakers for a variety of different rooms and
subwoofer locations. NOTE: The Crossover control functions only when
the Input Mode switch is in the “Normal” position. When the switch is
in the “LFE” position the subwoofer’s built-in crossover and Crossover
control are bypassed.
On/Standby indicator: This LED indicates whether the subwoofer is in
the On or Standby state:
• When the LED glows green, the subwoofer is turned on.
• When the LED glows red, the subwoofer is in the Standby mode.
• When the LED is off, the subwoofer’s Power switch is set to “Off.”
Line In connectors: The signals from these connectors pass through
the subwoofer’s internal low-pass crossover. When you’re connecting the
subwoofer to the preamp or subwoofer outputs of a receiver/processor
that does not have its own low-pass crossover network, use both Line In
connectors. IMPORTANT: You must also set the Input Mode switch in
the “Normal” position. If your receiver/processor has only one subwoofer
output, you can use either the L or R connector.
LFE In connector: The signal from this connector bypasses the subwoof-
er’s internal low-pass crossover. When you’re connecting the subwoofer
to the dedicated subwoofer output of a receiver/processor that has its own
low-pass crossover network, use the LFE In connector. IMPORTANT: You
must also set the subwoofer’s Input Mode switch in the “LFE” position.
Power switch: Set this switch in the “On” position to put the subwoofer in
the Standby mode (the On/Standby LED lights red); set this switch in the
“Off” position to turn the subwoofer off.
Power Cord connector: After you have made and verified all subwoofer
connections described in this manual, plug the power cord into an ac-
tive, unswitched electrical outlet for proper operation of the subwoofer.
DO NOT plug this cord into the accessory outlet found on some audio
components.
Green: On
Red: Standby
Level Control
Crossover Control
On/Standby Indicator
Phase Switch
Input Mode Switch
LFE In Connector
Line In Connectors
Power Switch
Power Cord
Connector
SUB 550P / 230
6

PLACING THE SUBWOOFER
The performance of a subwoofer is directly related to its placement in the
listening room and its physical position relative to the other speakers in the
system.
While it is true that in general our ears do not hear directional sounds at the
low frequencies where subwoofers operate, when installing a subwoofer
within the limited confines of a room, the reflections, standing waves and
absorptions generated within the room will strongly influence the perfor-
mance of any subwoofer system. As a result, the specific location of the
subwoofer in the room does become important to the amount and quality
of bass that is produced.
For example, placing the subwoofer next to a wall generally will increase
the amount of bass in the room; placing it in a corner (1) generally will
maximize the amount of bass in the room. However, corner placement can
also increase the destructive effect of standing waves on bass perfor-
mance. This effect can vary depending on the listening position – some
listening positions may yield very good results while others may have far
too much (or too little) bass at certain frequencies.
In many rooms, placing the subwoofer along the same plane as the left
and right speakers (2) can produce the best integration between the sound
of the subwoofer and that of the left and right speakers. In some rooms,
the best performance could even result from placing the subwoofer behind
the listening position (3).
We strongly recommend that you experiment with placement before choos-
ing a final location for your subwoofer. One way you can determine the best
location for the subwoofer is by temporarily placing it in the listening posi-
tion and playing music with strong bass content. Move around to various
locations in the room while the system is playing (putting your ears where
the subwoofer would be placed), and listen until you find the location where
the bass performance is best. Place the subwoofer in that location.
CONNECTING THE SUBWOOFER
TO A RECEIVER OR PREAMP/PROCESSOR WITH A LOW-PASS
FILTERED DEDICATED SUBWOOFER OUTPUT
Receiver or
Amplifier
SUB 550P
Subwoofer
Mono RCA Cable
(supplied)
Input Mode Switch
in “LFE” Position
TO A RECEIVER OR PREAMP/PROCESSOR WITH LINE OUTPUTS
Receiver or
Amplifier
SUB 550P
Subwoofer
Stereo
RCA Cable
(not supplied)
Input Mode Switch
in “Normal” Position
Front Left
Speaker
TV
Center
Speaker Front Right
Speaker
Surround Left
Speaker Surround Right
Speaker
1.
2.
3.
SUB 550P / 230
7

TURNING THE SUBWOOFER ON AND OFF
Set the subwoofer’s Power Switch to the “On” position. The subwoofer will
automatically turn itself on when it receives an audio signal, and it will go
into Standby mode after it has received no audio signal for approximately
10 minutes. The subwoofer’s LED will glow green when the subwoofer is
on and will glow red when the subwoofer is in Standby.
If you will not be using the subwoofer for an extended period – for
instance, if you’re going on vacation – set the Power Switch to the “Off”
position.
SUBWOOFER ADJUSTMENTS: CROSSOVER CONTROL
NOTE: The Crossover control functions only
when the Input Mode switch is in the “Normal”
position.
The Crossover control adjusts the subwoofer’s
built-in low-pass filter crossover between 50Hz
and 200Hz. The higher you set the Crossover
control, the higher in frequency the subwoofer
will operate and the more its bass will “overlap” that of the satellite speak-
ers. This adjustment helps achieve a smooth transition of bass frequencies
between the subwoofer and the satellites for a variety of different rooms
and subwoofer locations.
To set the Crossover control, listen for the smoothness of the bass. If the
bass seems too strong at certain frequencies, try a lower Crossover con-
trol setting. If the bass seems too weak at certain frequencies, try a higher
Crossover control setting.
SUBWOOFER ADJUSTMENTS: VOLUME
Use the Level control to set the subwoofer’s
volume. Turn the knob clockwise to increase the
subwoofer’s volume; turn the knob counterclock-
wise to decrease the volume. Once you have
balanced the subwoofer’s volume with that of
the other speakers in your system, you shouldn’t
have to change the Level control setting.
Notes on Setting Subwoofer Volume:
s3OMETIMESTHEIDEALSUBWOOFERVOLUMESETTINGFORMUSICISTOOLOUD
for films, while the ideal setting for films is too quiet for music. When
setting the subwoofer volume, listen to both music and films with
strong bass content and find a “middle ground” volume level that
works for both.
s)FYOURSUBWOOFERALWAYSSEEMSTOOLOUDORTOOQUIETYOUMAYWANT
to place it in a different location. Placing the subwoofer in a corner will
tend to increase its bass output, while placing it away from any walls
or corners will tend to lessen its bass output.
SUBWOOFER ADJUSTMENTS: PHASE
The Phase switch determines whether the subwoofer
driver’s piston-like action moves in and out in phase
with the satellite speakers. If the subwoofer were to
play out of phase with the satellite speakers, the sound
waves from the satellites could partially cancel out the
waves from the subwoofer, reducing bass performance
and sonic impact. This phenomenon depends in part on the placement of
all the speakers relative to each other in the room.
Although in most cases you should leave the Phase switch in the “Normal”
position, there is no absolutely correct setting for the Phase switch. When
the subwoofer is properly in phase with the satellite speakers, the sound
will be clearer and have maximum impact, and percussive sounds like
drums, piano and plucked strings will sound more lifelike. The best way
to set the Phase switch is to listen to music that you know well and to set
the switch in the position that gives drums and other percussive sounds
maximum impact.
OPERATING THE SUBWOOFER
SUB150P
SUB 550P / 230
8

Test Set Up and Procedure
Equipment needed:
xFunction/signal generator/sweep generator
xIntegrated Amplifier
xMultimeter
xSpeaker cables
General Unit Function (UUT = Unit Under Test)
1) From the signal generator, connect line level (RCA) cables to the Subwoofer Line Level Input jacks L/R on
the UUT. Use a Y-cable from a mono source if necessary to connect to both inputs.
2) Turn the CROSSOVER control to maximum (150).
3) Turn the LEVEL control on the UUT to completely counterclockwise (MIN).
4) LFE/NORMAL switch should be in NORMAL position.
5) PHASE switch position does not matter.
6) Turn on generator; adjust to 100mV, 50 Hz.
7) Plug in UUT; turn the power switch ON. LED should switch from Red to Green.
8) Turn LEVEL control clockwise until vigorous bass response is heard and felt
from port tube opening on the bottom.
9) Turn off generator, turn LEVEL control full counterclockwise (MIN), and disconnect RCA cable.
Sweep Function
1) Follow steps 1-8 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 woofer and test.
Driver Function
1) Remove woofer from cabinet; detach + and - wire clips.
2) Check DC resistance of woofer; it should be 3.4 ohms ±10%
3) Connect a pair of speaker cables to driver terminals. Cables should be connected to an integrated amplifier
fed by a signal generator. Turn on 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.
SUB 550P / 230
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Item Part Number Description Qty
1 244-100-05478-0BAE Grille 1
2 350-HM04020D149-E Screw 8
3 5110G Woofer 1
4 373-000-05145-E Feet 4
5 241-100-05598-0RAE Cabinet (CH) 1
241-100-05598-0BAE Cabinet (BK)
6 350-AM04020D079-E Screw 18
7 010-7625-05381-E Amp 1
Exploded View
SUB 550P / 230
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