JBL PSW-D112 (serv.man4) Service Manual ▷ View online
JBL Consumer Products Inc.
250 Crossways Park Drive
Woodbury, N.Y. 11797
1-800-336-4JBL in the USA
A Harman International Company
Rev E 7/2001
PSW-D112/DPS-12
Powered Subwoofer
SERVICE MANUAL
SAFETY INFORMATION
Warning
Caution
Leakage/Resistance Check
List of Safety Components Requiring
Exact Replacements
(all parts POWER AMP PCB except TR2)
Exact Replacements
(all parts POWER AMP PCB except TR2)
C6 (Rev0)
4.7uf 100V 80/-20% Electrolytic redial NP
C6 (Rev1)
4.7uf 100V 80/-20% Electrolytic redial NP
TR2
MPS A13 30V NPN(Darl)
R4a/b/c
0.1 0.5W 5% metal film
R9
3.3 5W 5% ceramic wirewound
R15
100k 0.5W 5% carbon film
DBR
Bridge Rect 200V Use only factory replacement.
R1
10M 0.25W 5% carbon film
R16, 17
1.8k 5W 5% ceramic wirewound
R33 (Rev0) only) 332 0.5W 5% carbon film
R50 (Rev0) only) 332 0.5W 5% carbon film
R52, 57
2.7k 5W 5% ceramic wirewound
R61
3.9k 3W 5% carbon film
S64AMI
Power output module. Use only factory
replacement
replacement
Faceplate
Faceplate. Use only factory replacement
CMC1
Use only factory replacement
L1
Use only factory replacement
Fuse PCB
Use only factory replacement
Main PCB
Use only factory replacement
4700uF,50V electrolytic filter caps. Be sure
replacement part is at least the same
working voltage and capacitance rating.
Also the lead spacing is important.
Incorrect spacing may cause premature
failure due to internal cabinet pressure and
vibration.
replacement part is at least the same
working voltage and capacitance rating.
Also the lead spacing is important.
Incorrect spacing may cause premature
failure due to internal cabinet pressure and
vibration.
2
Amplifier/Subwoofer
PSW-D110/DPS-10
F1
PWRCORD
TRX1
C1, 2
Transformer. Use only factory replacement.
SPT-2 or better with polarized plug, UL
approved wire with the hot side to fused
side. Use with factory replacement panel
strain relief only.
approved wire with the hot side to fused
side. Use with factory replacement panel
strain relief only.
Fuse SLO BLO 1.25A 250V UL approved
Any person performing service of this unit will be exposed
to hazardous voltages and the risk of electric shock. It is
assumed that any person who removes the amplifier from
this cabinet has been properly trained in protecting against
avoidable injury and shock. Therefore, any service
procedures are to be performed by qualified service
personal ONLY!
to hazardous voltages and the risk of electric shock. It is
assumed that any person who removes the amplifier from
this cabinet has been properly trained in protecting against
avoidable injury and shock. Therefore, any service
procedures are to be performed by qualified service
personal ONLY!
Before returning the unit to the customer, perform a
leakage or resistance test as follows:
leakage or resistance test as follows:
Leakage Current. Note there is no power switch on this
unit. When the power plug is plugged in, the unit is live.
Connect the unit to its rated power source. Using an
ammeter, measure the current between the neutral side of
the AC supply and chassis ground of the unit under test. If
leakage current exceeds 0.5A, the unit is defective.
Reverse the polarity of the AC supply and repeat.
unit. When the power plug is plugged in, the unit is live.
Connect the unit to its rated power source. Using an
ammeter, measure the current between the neutral side of
the AC supply and chassis ground of the unit under test. If
leakage current exceeds 0.5A, the unit is defective.
Reverse the polarity of the AC supply and repeat.
Resistance. Measure the resistance from either side of the
line cord to chassis ground. If it is less than 500k ohms, the
unit is defective.
line cord to chassis ground. If it is less than 500k ohms, the
unit is defective.
WARNING! DO NOT return the unit to the customer if it
fails one of these tests until the problem is located and
corrected.
fails one of these tests until the problem is located and
corrected.
This unit does not have a power switch. Hazardous
voltages are present within the unit whenever it is
plugged in.
voltages are present within the unit whenever it is
plugged in.
Before the amplifier is plugged in, be sure its rated voltage
corresponds to the voltage of the AC power source to be
used. Incorrect voltage could cause damage to the
amplifier when the AC power cord is plugged in. Do not
exceed rated voltage by more than 10%: operation below
90% of rated voltage will cause poor performance or may
shut the unit off.
corresponds to the voltage of the AC power source to be
used. Incorrect voltage could cause damage to the
amplifier when the AC power cord is plugged in. Do not
exceed rated voltage by more than 10%: operation below
90% of rated voltage will cause poor performance or may
shut the unit off.
0
0
4
6
5
-2
IMPORTANT SERVICE NOTES: When testing the PSW-D112/DPS-12 Series amplifier, a load must always be
connected to the output terminals, whether the woofer, or a 4 to 8 ohm resistive load.
All AC powered test instruments (meters, oscilloscopes, etc.) must have a floating ground, i.e., be
connected to an isolation transformer.
Critical Components
All components identified with the IEC symbol
in the parts list and the schematic diagram
designate components in which safety can be
of special significance when replacing a
component identified with . Use only the
in the parts list and the schematic diagram
designate components in which safety can be
of special significance when replacing a
component identified with . Use only the
replacement parts designated in the parts list or parts with
the same rating of resistance, wattage or voltage.
the same rating of resistance, wattage or voltage.
3
Amplifier/Subwoofer
PSW-D112/DPS-12
TABLE OF CONTENTS
SAFETY INFORMATION .......................................................2
TABLE OF CONTENTS.........................................................3
GENERAL SPECIFICATIONS ...............................................3
DETAILED SPECIFICATIONS...............................................4
CONTROLS AND THEIR FUNCTION...................................6
OPERATION...........................................................................7
SPEAKER CONNECTIONS...................................................8
TROUBLESHOOTING .........................................................10
TEST SET UP AND PROCEDURE......................................11
TESTING PROCEDURE......................................................12
POWER AMP MODULE TESTING FLOW CHART............14
SERVICE BULLETIN JBL2001-02 - FEBRUARY 2001........16
SERVICE BULLETIN JBL9903 Rev 1 - FEBRUARY 2001..15
CABINET EXPLODED VIEWS ............................................17
AMPLIFIER EXPLODED VIEW ...........................................18
MECHANICAL PARTS LIST................................................19
PACKING EXPLODED VIEWS....................................20
Rev0 PCB (Component Side)......................................21
Rev0 PCB (Solder Side)..............................................22
PCB (Component Side) PREAMP Rev1,
PWRAMP Rev1............................................................23
PCB (Solder Side) PREAMP Rev1,
PWRAMP Rev1............................................................24
ELECTRICAL PARTS LIST (Rev0) .............................25
ELECTRICAL PARTS LIST Rev1 PCB.......................27
INTEGRATED CIRCUITS ............................................29
SCHEMATIC 1 of 3 (Rev0) .........................................30
SCHEMATIC 2 of 3 (Rev0) .........................................31
SCHEMATIC 3 of 3 (Rev0) .........................................32
PREAMP SCHEMATIC Rev1 ......................................33
POWERAMP SCHEMATIC Rev1.0 .............................34
POWERAMP SCHEMATIC Rev1.1 .............................35
GENERAL SPECIFICATIONS
Amplifier Power (RMS). . . . . . . . 250 watts
Driver 12" . . . . . . . . . . . . . High-Polymer Laminate
Inputs . . . . . . . . . . . . . . . Line Level and Speaker Level
Outputs . . . . . . . . . . . . . . Line Level and Speaker Level
Low-Pass Frequency . . . . . . . . Continuously variable from 60Hz – 180Hz
High-Pass Frequency . . . . . . . . Continuously variable from 60Hz – 180Hz
Driver 12" . . . . . . . . . . . . . High-Polymer Laminate
Inputs . . . . . . . . . . . . . . . Line Level and Speaker Level
Outputs . . . . . . . . . . . . . . Line Level and Speaker Level
Low-Pass Frequency . . . . . . . . Continuously variable from 60Hz – 180Hz
High-Pass Frequency . . . . . . . . Continuously variable from 60Hz – 180Hz
when using line-level inputs
150Hz when using speaker-level inputs
Frequency Response . . . . . . . . 28Hz – low-pass crossover setting
PSW-D112
DPS-12
Dimensions (H x W x D) . . . . . . . 17-1/2 x 17-1/2 x 19-1/8"
22-1/8 x 17-1/2 x 17-1/2"
(445 x 445 x 486mm)
(562 x 445 x 445mm)
Weight . . . . . . . . . . . . . . . 40 lbs/18.2 kg
38 lbs/17.3kg
NOTE: CERTAIN DRAWINGS AND CONNECTIONS WERE DEPICTED INCORRECTLY IN SOME EARLY COPIES
OF THE PSW-D112 AND DPS-12 OWNER'S MANUALS .
OF THE PSW-D112 AND DPS-12 OWNER'S MANUALS .
THEY INCLUDE:
1
. DRAWING OF RCA LINE LEVEL INPUT/OUTPUT JACKS ON PAGES 3, 4, & 5; ALL CHANNELS - RIGHT SIDE
SHOULD BE “LINE OUT”, LEFT SIDE SHOULD BE “LINE IN”.
2
. CONNECTION ON PAGE 4 OF OWNER'S MANUAL - SINGLE CABLE DIRECT INPUT (FOR DOLBY DIGITAL OR
DTS SURROUND); SINGLE CABLE FROM YOUR RECEIVER/PROCESSOR SHOULD CONNECT TO:
Rev0 version - THE “CENTER CHANNEL LINE IN” JACK ON YOUR SUBWOOFER.
Rev1 version - EITHER LEFT OR RIGHT INPUT JACK ON YOUR SUBWOOFER.
THOSE DRAWINGS ARE CORRECT IN THIS DOCUMENT, SEE PAGES 8 & 9.
DETAILED SPECIFICATIONS
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
Test Limits Conditions
Notes
Amp Section
Type (Class AB, D, other)
D
n/a
Class D Preferred...Sink required for Class
AB
Load Impedance (speaker)
8
Ohms
n/a
Nominal
Z-curve required
Rated Output Power
250
Watts
150
1 input driven
Peak power
THD@ Rated Power
0.3
%
1
22k filter
160w (Power Bandwidth 30-100Hz) @ 120
VAC
THD @ 1 Watt
0.5
%
0.8
22k filter
DC Offset
<20
mV-DC
10mV
@ Speaker Outputs
Damping factor
>90
DF
>50
Input Sensitivity
Input Frequency
40
Hz
Nominal Freq.
1 input driven
Line Input
265
mVrms
±2dB
To Rated Power/ Vol @ Max 1 input driven: AP source Z = 600 ohms
Speaker/Hi Level Input
9.3
Vrms
±2dB
To Rated Power/ Vol @ Max 1 input driven: AP source Z = 25 ohms
Signal to Noise
SNR-A-Weighted
100
dBA
90
Relative to rated output
A-Weighting filter
SNR-unweighted
75
dBr
70
Relative to rated output
22k filter
SNR rel. 1W-unweighted
(22k)
65
dBr
55
relative to 1W Output
22k filter
Residual Noise Floor
2
mVrms
2.5
Volume @max, using RMS reading DMM/VOM (or A/P) , BW <20KHz
Residual Noise Floor
1.5
mVrms(max
)
2
Volume @max, w/ A/P Swept Bandpass Measurement (Line freq.+
harmonics) , BW<20Khz
Input Impedance
Line Input
10K
ohms
n/a
Nominal
Speaker/Hi Level Input
5K
ohms
n/a
Nominal
Filters
0dBr = 1w @ 50Hz
Low Pass (fixed or variable)
Variable
Low Pass filter (point or
range)
60-180
Hz
±2dB
-3dB Point
Slope
24
dB/Octave
n/a
Q
1
Damping
n/a
Subsonic filter (HPF)
25
Hz
±2dB
-3dB Point
Slope
12
dB/Octave
n/a
Q
1
Damping
n/a
AV Boost
YES
—
4
Amplifier/Subwoofer
PSW-D112/DPS-12