Read JBL S412P STUDIO SERIES (serv.man2) Service Manual online
STUDIO SERIES
S412P
4 - way POWERED SPEAKER SYSTEM
SERVICE MANUAL
JBL Consumer Products
250 Crossways Park Dr.
250 Crossways Park Dr.
Woodbury, New York 11797
Rev 0 – 2/2000
- CONTENTS -
GENERAL SPECIFICATIONS………………...………………...………………..2
AMPLIFIER SPECIFICATIONS……………………………….……...…………..3
SET-UP GUIDE………..………………….…………………………..…..………..4
CONTROLS……………………………….……………..………………..………..6
TROUBLESHOOTING…………..…………………………...……..……………..7
MECHANICAL PARTS LIST………………………….…………………………..8
CABINET EXPLODED VIEW……………………………………………………..9
WIRING/PASSIVE SCHEMATIC DIAGRAMS……..……..……………………..10
AMPLIFIER EXPLODED VIEW………………..…..…...……….………………..11
BLOCK DIAGRAM…………………………………………………..…………….12
INTEGRATED CIRCUIT DRAWINGS………….…………..…………………....13
ELECTRICAL PARTS LIST……………………………….……………………….14
P. C. BOARDS……………………………..…………….……………………..…..17
SCHEMATICS…..………………..……………..……….…….…………….……..19
PACKAGING…………………………………………….……………………..…..22
S412P
GENERAL ACOUSTIC & ELECTRICAL SPECIFICATIONS
•
Nominal Impedance
8 ohms
•
Max Amp Power
250 watts*
•
Frequency Response
32Hz – 20kHz
•
Sensitivity
91 dB (1 watt @ 1 meter)
•
Crossover Frequency
200Hz, 850Hz, 3500Hz
•
Subwoofer Amplifier Output
200 watts
AURAL SWEEP TEST SPECIFICATIONS:
A. System Aural Sweep Test
6.0V Input 20 Hz to 20 kHz
B. L.F. Aural Sweep Test
6.0V Input 20 Hz to 500 Hz
C. M.B.F. Aural Sweep Test
5.0V Input 100 Hz to 1 kHz
D. M.F. Aural Sweep Test
4.0V Input 500 Hz to 4 kHz
E. H.F. Aural Sweep Test
2.83V Input 3 kHz to 20 kHz
PHYSICAL SPECIFICATIONS
Enclosure dimensions:
44 x 16 x 13 3/8” (H x W x D)
1118 x 406 x 340mm
1118 x 406 x 340mm
Weight
86lbs./39.1kg Each
*The maximum recommended amplifier power rating will ensure proper system headroom to
allow for occasional peaks. We do not recommend sustained operation at these maximum
power levels.
allow for occasional peaks. We do not recommend sustained operation at these maximum
power levels.
Occasional refinements may be made to existing products without notice but will always meet
or exceed original specifications, unless otherwise stated.
or exceed original specifications, unless otherwise stated.
2
PRODUCT: JBL S412P
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
Parameter
Specification
Unit
QA Test
Limits
Conditions
Notes
Amp Section
Type (Class AB, D, other)
Type (Class AB, D, other)
G
n/a
n/a
Class D Preferred...Sink required for Class AB
Load Impedance (speaker)
4
Ohms
n/a
Nominal
Z-curve required
Rated Output Power 150 Watts 130 1 input driven
THD @ Rated Power 0.1 % 1 22k filter
THD @ 1 Watt
THD @ Rated Power 0.1 % 1 22k filter
THD @ 1 Watt
0.3
%
0.5
22k filter
DC Offset
10
mV-DC
20
@ Speaker Outputs
Damping factor
>150
DF
100
Measured at amplifier board
Measured at the speaker connector. 130 Watts
@ THD < 0.08 % @ 50 Hz
@ THD < 0.08 % @ 50 Hz
>75
50
Measured at speaker cable
Input Sensitivity
Input Frequency
Input Frequency
30
Hz
30
Nominal Freq.
LFE input
1.05
Vrms
±2dB
To 140 Watts
Speaker/Hi Level Input
23.66
Vrms
±2dB
To 140 Watts
Signal to Noise
SNR-A-Weighted
SNR-A-Weighted
100
dBA
90
relative to rated power
A-Weighting filter
SNR-unweighted
70
dBr
70
relative to rated power
22k filter
SNR rel. 1W-unweighted
65
dBr
60
relative to 1W Output
22k filter
Residual Noise Floor
1
mVrms
5
Volume @max, using RMS reading
DMM/VOM (or A/P)
DMM/VOM (or A/P)
Residual Noise Floor
1.5 mVrms(max)
4
Volume @max, w/ A/P Swept
Bandpass Measurement (Line
freq.+ harmonics)
Bandpass Measurement (Line
freq.+ harmonics)
Input Impedance
Line Input
20k
ohms
n/a
Nominal
Speaker/Hi Level Input
10k
ohms
n/a
Nominal
Filters
Speaker in LP 2nd order fixed
Speaker in LP 2nd order fixed
Fixed
See AP curves
Subsonic filter (HPF)
See AP curves
LFE Low pass 2nd order
Fixed
LFE input driven only
See AP curves
Limiter
THD at Max. Output Power
THD at Max. Output Power
n/a
n/a
functional Maximum Output Power
Maximum THD as a result of limiting.
Features
--
Auto - On selection switch
YES
--
functional
Refer to ATO section
LED On-Off switch
YES
--
functional
Dual LED indicator
Volume pot Taper (lin/log)
LOG
--
functional
A Taper
Input Configuration
Line In LFE
Line In LFE
YES
--
functional
Single RCA jack
Spkr/Hi Level In
YES
--
functional
Signal Sensing (ATO)
Auto-Turn-On (yes/no)
Auto-Turn-On (yes/no)
YES
functional Auto - on selection switch in Auto
ATO Input test frequency
30
Hz
functional
"
ATO Level LFE Input
4
mV
functional
"
ATO Level Speaker in
100
mV
functional
"
ATO Turn-on time
5
ms
functional
Amp connected and AC on, then
input signal applied
input signal applied
Auto Mute/ Turn-OFF Time
15
minutes
17
T before muting, after signal is
removed
removed
Maximum
S412P AMPLIFIER SPECIFICATIONS
3
