JBL 1500 ARRAY, Service Manual

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1500 Array Powered Sub/ Plate Amp
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 207-264 230 Vrms Normal operation, MOMS required
Asia 100VAC/50Hz YES 90-110 100 Vrms Normal operation, MOMS required
Parameter Specification Unit
QA Test
Limits Conditions Notes
Amp Section
Type (Class AB, D, other) D n/a n/a
Bridge type amplifier, None of the speaker terminals
must be connected to system GND at any time.
Load Impedance (speaker) 8 Ohms n/a Nominal
Rated Output Power 650 Watts 593 1 input driven Test frequency 100 Hz
THD @ Rated Power 0.5 % 1 22K filter
THD @ 1 Watt 0.1 %
0.2
22K filter
Dynamic Power 700 Watts 690
Power is the average measurement
of the first four consecutive peaks of
the burst signal
3/20 Cycles @ 50 Hz, burst test into 8 Ohms, input
driven with 800mV RMS
DC Offset 20 mV-DC 100 @ Speaker Outputs
Damping factor >20 DF 15 Measured at amplifier board
Measured at the speaker cable. 500 Watts,
measured at speaker output terminals located at the
amp board.
Input Sensitivity
Input Frequency 100 Hz 100 Nominal Freq.
Line level input 11.69 mVrms ±2dB To 1 Watt
Single input driven, Ap Zo=600 Ohms, LFE mode,
Volume ctrl. at max.
Signal to Noise
SNR-A-Weighted 100 dBA 95 Relative to rated power (650 Watts) A-Weighting filter
SNR-unweighted 95 dBr 90 Relative to rated power (650 Watts) 22K filter
SNR rel. 1W-unweighted 70 dBr 65 Relative to 1W Output 22K filter
Residual Noise Floor 0.5 mVrms 1
Volume @max, LFE Mode, using
RMS reading DMM/VOM (or A/P)
Residual Noise Floor 0.5 mVrms(max) 1
Volume @max, LFE Mode, w/ A/P
Swept Bandpass Measurement
(Line freq.+ harmonics)
Input Impedance
Line Input 10K ohms n/a Nominal
Filters
LP 4th order variable 40-140 Hz ± 10
Subsonic filter (HPF) 3rd Orde Fixed Hz ± 10
LFE Mode Fixed Hz ± 10 LP Mode switch at LFE
Features
Line Level output YES functional RCA Line buffered line level output
Volume pot Taper (lin/log) LOG --
functional
A Taper
Variable crossover 40-140 Hz YES functional
4th Order LP Filter, 2nd order fix and 2nd order
variable.
LP Selector switch LFE-
Normal
YES functional Pass through from the speaker input section
Phase switch YES -- functional Disables LP filter, intended for LFE
Auto- On-Off selector YES functional Switch located at the back panel
Input Configuration
Single Line input YES -- functional Single RCA jack (BLK Color)
Line output configuration
Single Line level output YES Functional
Gain=0dB respect to line level input,
Zo=600 Ohms
Single RCA jack (BLK Color)
Signal Sensing (ATO)
Auto-Turn-On (yes/no) YES functional Auto - on selection switch in Auto
ATO Input test frequency 50 Hz functional "
ATO Level, Line Input 2.5 mV functional "
ATO Turn-on time 2 seconds functional
Amp connected and AC on, then
input signal applied
Auto Mute/ Turn-OFF Time 15 minutes
17
(T) Time before muting, after input
signal is removed
Auto turn of time (T) must be 10 > T < 17 Minutes
Power on Delay time
ATO mode 4 sec. 5 After applying the minimum ATO voltage (2mVRMS)
ON mode 2 sec. 2 After turning the stand-by knob to ON position
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1500 Array Subwoofer