JBL SCS160SI, Service Manual

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150W Powered Sub/ Plate Amp
LINE VOLTAGE Yes/No Hi/Lo Line Unit Notes
US 120vac/60Hz Yes 108-132 Vrms Normal Operation
Asia 100vac/50Hz Yes 90-110 Vrms Normal Operation
Parameter Specification Unit QA Test Limits Conditions Notes
Amp Section
Type (Class AB, D, other) D D n/a
Load Impedance (speaker) 4 Ohms n/a Nominal
Rated Output Power 150 Watts 145 1 input driven
THD@ Rated Power 0.08 % 1 22k filter
THD @ 1 Watt 0.1 % 0.5 22k filter
DC Offset 10 mV-DC 20 @ Speaker Outputs
Damping factor >100 DF 30
Measured at speaker terminals, Output
power 140 Watts THD 0.1 %
Input Sensitivity
Input Frequency 50 Hz 50 Nominal Freq. 1 input driven
Line Input (L&R) 250 mVrms ±2dB To Rated Power 1 input driven
LFE Input 145 mVrms ±2dB To Rated Power LFE input driven only
Speaker/Hi Level Input 2 Vrms ±2dB To Rated Power (-20 dB below Line In)...1 input driven
Signal to Noise
SNR-A-Weighted 100 dBA 85 rel. to rated power A-Weighting filter
SNR-unweighted 90 dBr 80 rel. to rated power 22k filter
SNR @ 1W-unweighted 60 dBr 55 rel. to 1W Output 22k filter
Residual Noise Floor 1 mVrms 2
Volume @max, using RMS reading
DMM/VOM (or A/P)
Residual Noise Floor 1
mVrms(max)
2
Volume @max, w/ A/P Swept Bandpass
Measurement (Line freq.+ harmonics)
Input Impedance
Line input L&R , LFE >15 K ohms n/a Nominal
Speaker/Hi Level Input 4.7 K ohms n/a Nominal
Filters
Left & Right Low Pass fixed Hz -- ±2dB
Slope & Q 4th dB/Octave n/a
LFE Low Pass fixed Hz -- ±2dB
Slope & Q 2nd dB/Octave n/a
Subsonic filter (HPF) Hz -- ±2dB
Slope & Q 2nd dB/Octave n/a
Limiter YES -- n/a
Features
LFE Input YES functional BW Limited to 500 Hz
Volume pot Taper (lin/log) log -- functional
ATO YES functional
Signal Sensing (ATO)
ATO test Frequency 50 Hz functional
ATO Line Level 2 mV functional
2mV@50Hz into Line Input w/ 1 ch.
driven
ATO Speaker level input 50 mV fucntional
50mV@50Hz into Line Input w/ 1 ch.
driven
ATO Turn-on time 5 ms functional
Amp connected and AC on, then input
signal applied
Auto Mute/ Turn-OFF Time 15 minutes functional T before muting, after signal is removed Auto turn of time (T) must be 10 > T <15
Power on Delay time 3 sec. functional AC Power Applied
Transients/Pops
ATO Transient 5 mV-peak 10 @ Speaker Outputs
Turn-on Transient 50 mV-peak 100 @ Speaker Outputs AC Line cycled from OFF to ON
Turn-off Transient 50 mV-peak 100 @ Speaker Outputs AC Line cycled from ON to OFF
Efficiency
Stand-by Input Power 14 Watts 16 @ nom. line voltage
Maximum allowable input power under
nominal Input voltage and frequency, HOT
or COLD operation.
Power Cons.@rated power 230 Watts 250 @ nom. line voltage 140 Watts @ 4 Ohms nominal line voltage
Protection
Short Circuit Protection YES -- functional Direct short at output
Thermal Protection 65 deg. C -- functional @1/8 max unclipped Power
Temperature rise should not exceed 35K
rise
DC Offset Protection YES -- functional DC present at Speaker Out leads Relay or crowbar (for driver/fire protection)
Line Fuse Rating
US Version 3.15 Amps Type-T or Slo Blo External fuse with UL/SEMKO rated holder
SCS150SI/SCS160SI/SCS180.6S
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