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NorthridgeTM E-Series
E150P
Powered Subwoofer
Service Manual




JBL Consumer Products
250 Crossways Park Dr.
Woodbury, New York 11797 Rev2 2/2004
E150P

- CONTENTS -

BASIC SPECIFICATIONS ......................................1
SAFETY INFORMATION .......................................2
DETAILED SPECIFICATIONS ................................3
CONNECTIONS....................................................4
OPERATION ........................................................7
BASIC TROUBLESHOOTING.................................8
EXPLODED VIEW/PARTS LIST...............................9
TEST SET-UP AND PROCEDURE..........................10
AMPLIFIER BLOCK DIAGRAM...............................11
TECH TIP JBLTT2003-04 .....................................12
DETAILED TROUBLESHOOTING.................... ......13
P.C.B. DRAWINGS...............................................16
ELECTRICAL PARTS LIST ...................................20
IC/TRANSISTOR PINOUTS.....................................24
SCHEMATICS.....................................................25
PACKING...........................................................27


E150P SPECIFICATIONS

Amplifier Power (RMS): 150 Watts
Peak Dynamic Power *: 250 Watts
Driver: 10" (254mm) PolyPlasTM
Inputs: Line Level (switchable to LFE) and Speaker
Level with 5-way binding posts
Low-Pass Frequency: Variable from 50Hz to 150Hz
Frequency Response: 27Hz ­ Low-pass crossover setting
Dimensions (H x W x D): 17-3/4" x 12-1/4" x 14-1/2"
(451mm x 311mm x 368mm)
Weight: 33.5 lb/15.2kg


JBL continually strives to update and improve existing products, as well as create new ones. The
specifications and details in this and related JBL publications are therefore subject to change without
notice.

* The Peak Dynamic Power is measured by recording the highest center-to-peak voltage measured across the output of a resistive load
equal to minimum impedance of the transducer, using a 50Hz sine wave burst, 3 cycles on, 17 cycles off.

1
E150P

SAFETY INFORMATION
Warning List of Safety Components
Any person performing service of this unit will be exposed
Requiring Exact Replacements
to hazardous voltages and the risk of electric shock. It is
assumed that any person who removes the amplifier from Part Number/ Description
this cabinet has been properly trained in protecting Designator
against avoidable injury and shock. Therefore, any service
procedures are to be performed by qualified service F1 Line Fuse Slo Blo 1.25A
personal ONLY! 093-205209-300 5x20mm
083-041802-009 250V UL approved SPT-2 or
Caution better with polarized plug, UL
approved wired with the hot side
Early revisions of the unit did not have a power switch. to fused
Hazardous voltages are resent within the unit whenever it side. Use with factory
is plugged in. replacement panel strain relief
(70305) only.
Before amplifier is plugged in, be sure its rated voltage
corresponds to the voltage of the AC power source to be Power Transformer.
PT1
used. Incorrect voltage could cause damage to the Use only factory
042-010052-003
amplifier when the AC power cord is plugged in. Do not replacement.
exceed rated voltage by more than 10%: operation below BR1 Bridge diode. Use only
90% of rated voltage will cause poor performance or may 052-400080-000 factory replacement.
shut the unit off.
4700uF 50V electrolytic
Leakage/Resistance Check filter caps. Be sure
Before returning the unit to the customer, perform a replacement part is at
least the same working
leakage or resistance test as follows: voltage and capacitance
C6,8
rating. Also the lead
Leakage Current. Note there is no power switch on early 034-470745-200
spacing is important.
revisions of this unit. When the power plug is plugged in, Incorrect spacing may
the unit is live. Connect the unit to its rated power source. cause premature failure
Using an ammeter, measure the current between the due to internal cabinet
neutral side of the AC supply and chassis ground of the pressure and vibration.
unit under test. If leakage current exceeds 0.5mA, the unit
is defective. Reverse the polarity of the AC supply and Rear Amp Cover
repeat. 063-531808-000 Use only factory
replacement
Resistance. Measure the resistance from either side of the Inductor L1 - Use only factory
line cord to chassis ground, If it is less than 500k ohms, 043-560200-000 replacement
the unit is defective.
Inductor L2 - Use only factory
WARNING! DO NOT return the unit to the customer if it 043-300101-000 replacement
fails one of these tests until the problem is located and Inductor L3 - Use only factory
corrected. 043-700101-000 replacement
Inductor L4 - Use only factory
Critical Components 043-324300-000 replacement

All components identified with the IEC
symbol in the parts list and schematic
diagram designate components in which
safety can be of special significance when
replacing identified with. Use only the
replacement parts designated in the parts list or parts
with the same rating of resistance, wattage or voltage.



2
E150P

JBL E150P 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

QA Test
Parameter Specification Unit Limits Conditions Notes
Amp Section
Type (Class AB, D, other) D 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 75 Watts 70 1 input driven

Average RMS power, 3/20 Cycles 50 Hz, Driven
AVG RMS Dynamic Power 150 Watts 135 6dB above its input sensitivity sensitivity
THD @ Rated Power 0.3 % 1 22k filter 75 Watts
THD @ 1 Watt 0.1 % 0.5 22k filter
DC Offset 10 mV-DC 30 @ Speaker Outputs
Measured at the amplifier board THD < 0.1% 75
Damping factor 50 DF 35 Measured at amplifier board Watts @ 50Hz

Input Sensitivity
Input Frequency 50 Hz 50 Nominal Freq.
L&R 128 mVrms ±2dB To 75 Watts Single input driven LP defeat switch OFF
LFE 128 mVrms ±2dB To 75 Watts LP defeat switch ON- Single input driven
Speaker/Hi Level Input 1.28 Vrms ±2dB To 75 Watts Single input driven

Signal to Noise
SNR-A-Weighted 100 dBA 70 relative to rated power A-Weighting filter
SNR-unweighted 80 dBr 70 relative to rated power 22k filter
SNR rel. 1W-unweighted 65 dBr 60 relative to 1W Output 22k filter
Volume @max, using DVM or A/P Line level inputs must be terminated using
Residual Noise Floor 1 mVrms 2 (BW=20 KHz) 1KOHM
Volume @max, w/ A/P Swept
Bandpass Measurement (Line Line level inputs must be terminated using
Residual Noise Floor 1.5 mVrms(max) 2 freq.+ harmonics) (BW=20Khz) 1KOHM

Input Impedance
Line Input 10K ohms n/a Nominal
Speaker/Hi Level Input >4.7K ohms n/a Nominal

Filters
Speaker in LP 2nd order varia 60-150 Hz ± 10
Subsonic filter (HPF) fixed 6th Fixed
LFE Low pass 2nd order fixed 200>LP<1K Hz Single input driven
Speaker out HP filter
Speaker input driven - Speaker out
Left & Right outputs 200 Hz ± 10 loaded with 4 Ohms (Applies only to 230V Model)

Note: 120V Models do not Speaker input driven - Speaker out
have speaker output 100 Hz ± 10 loaded with 8 Ohms (Applies only to 230V Model)

Limiter
THD at Max. Output Power n/a n/a functional Maximum Output Power Maximum THD as a result of limiting.

Features --
Volume pot Taper (lin/log) LOG -- functional A Taper
Phase switch 0-180 deg functional
LP Defeat switch YES functional LFE function selection

Input Configuration
Line In & LFE YES -- functional LR dual RCA jack
Spkr/Hi Level In YES -- functional Binding post connector L&R

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 LFE Input 4 mV functional "
ATO Level Speaker in 50 mV functional "
Amp connected and AC on, then
ATO Turn-on time 5 ms functional input signal applied
T before muting, after signal is Auto turn of time (T) must be 5 > T < 15
Auto Mute/ Turn-OFF Time 15 minutes 17 removed Minutes

Power on Delay time 3 sec. 4 AC Power Applied

Transients/Pops
ATO Transient 5 mV-peak n/a @ Speaker Outputs
Turn-on Transient 50 mV-peak 2v-pp @ Speaker Outputs AC Line cycled from OFF to ON


3
E150P

QA Test
Parameter Specification Unit Limits Conditions Notes
Turn-off Transient 50 mV-peak 2v-pp @ Speaker Outputs AC Line cycled from ON to OFF

Efficiency
Efficiency 65 % 64 Nominal Line voltage 120 VAC / 230 VAC
Auto turn of time (T) must be 5 > T < 15
Stand-by Input Power 15 Watts 18 @ nom. line voltage Minutes
Power Cons. @ rated power 115 Watts 120 @ nom. line voltage 75 Watts @ 4 Ohms nominal line voltage

Protections
Amplifier should resume operation after short
Short Circuit Protection YES functional Direct short at output circuit condition removal
Temperature rise in accessible metal parts
should not exceed 35K rise for domestic version
or 30K rise for European versions (refer to
Thermal Protection YES functional @1/8 max unclipped Power requirements sheet).
Design must insure no Offset at the speaker
output under any operating condition including
DC Offset Protection YES - DC present at Speaker Out leads abnormal operation
Line Fuse Rating
US Domestic version 1.25 Amps 1.25 Type-T or Slo Blo-250 V Internal fuse with UL/SEMKO rated holder
Type-T or Slo Blo-250 V, Low
EU 0.8 Amps 0.8 Breaking capacity Internal fuse with UL/SEMKO rated holder

4. ALL SPECS SHOULD BE MEASURED AT NOMINAL LINE VOLTAGE.




SPEAKER CONNECTION
When we designed the through the hole in the post, NOTE: The speaker-level con-
E150P and E250P powered then screw the collar back nection method described on
subwoofers, our goal was down until the connection is the next page is not a
to offer the user the best pos- tight. The holes in the center preferred connection
sible performance combined of the collars are intended for and should only be
with the most flexible and banana-type connectors. resorted to if your receiver/
complete installation options. processor does not have a
Speakers and electronics termi-
Please look over the following line-level or subwoofer output.
nals have corresponding positive
three examples to determine The customer is responsible for
(+) and negative (­) terminals. It
which description best proper connections, and any
is important to connect both
matches your system and damage to JBL or other equip-
speakers identically:
follow the corresponding ment due to improper connec-
positive (+) on the speaker
hookup instructions. tions will not be covered by
to positive (+) on the amplifier
your JBL warranty. Consult with
To use the binding-post and negative (­) on the speaker
your JBL dealer or an audio-
speaker terminals with bare to negative (­) on the amplifier.
installation expert if you have
wire, unscrew the collar until Wiring "out of phase" results in
any questions about how to
the hole through the center thin sound, weak bass and a
connect your subwoofer using
post is visible under the collar. poor stereo image.
the speaker-level inputs.
Insert the bare end of the wire




4
E150P
Analog Receiver/Processor ­ Speaker-Level Connections
Use this installation method the left high-level inputs on speaker and left input on the
only with an analog receiver/ the subwoofer. Insert the subwoofer, and then for the (+)
processor that does not have joined (twisted) wires into the and (­) connections for the
digital processing or bass left front (+) terminal on your right front speaker and right
management, and also does receiver/amplifier. Connect the high-level inputs on the sub-
not have a subwoofer output free end of the (+) lead for the woofer.
or a volume-controlled preamp left front speaker to the (+) ter- Connect your receiver or
(line-) level output: minal on the back of the amplifier's center and sur-
Connect the speaker wires for speaker. Connect the free end round speaker terminals to the
both your main left and right of the (+) lead for the left input corresponding terminals on
speakers, and for the sub- on the subwoofer to the left the back of your center and
woofer, to the same speaker binding-post terminal. Repeat surround speakers.
terminals on your receiver or this process for the (­)
amplifier. The wires may be connections for the left front
joined by twisting together the Left Front Right Front
Center
bare ends of the two leads + ­ + ­ + ­
that will be connected to each
terminal on the receiver/
amplifier, as shown in the
diagram. This procedure
should be done only four times
Subwoofer
(involving a total of eight bare-
wire ends), and only for those
L
wire ends that are being con-
HIGH
nected to the terminals on LEVEL
IN
your receiver/amplifier. It is
important that you avoid join- R
ing any other wires. Do not + ­
twist together
wire ends that Receiver
are being Left Front Center Right Front
inserted into + ­ + ­ + ­
terminals on any
speaker or on the
Twist Twist
subwoofer. Do not twist Here Here
together wire ends that will be Left Surround Right Surround
used for any speakers other
than the front left and right + ­ + ­
speakers or the subwoofer.
Refer to the connection dia-
gram for guidance.
Left Surround Right Surround
Twist together the (+) leads at
+ ­ + ­
one end of the speaker wires
that you have designated for
the left front speaker and for

To (+) terminal on
left speaker To front left
(+) terminal on
To (+) terminal of left receiver/amplifier
input on subwoofer




5
E150P
Analog Receiver/Processor ­ Line-Level Connections
Use this installation method may connect the subwoofer
with an analog receiver/ output on your receiver/pre-
processor that does not have amplifier to either the left or
digital processing or bass right line-level input on the
management, and that is subwoofer. It makes no differ- LEVEL
equipped with a full-range ence which jack you choose. Min Max


subwoofer output or a volume- Connect each speaker to LFE NORMAL


controlled preamp (line-) level the corresponding speaker PHASE 0º 180º
output: terminals on your
Use RCA-type interconnect receiver or amplifier. CROSSOVER
cables to connect the line- Make sure your receiver
FREQUENCY
RECEIVER 50Hz 150Hz
level subwoofer outputs on or processor is config-
Subwoofer
your receiver or amplifier to ured so that the sub- Out
L R L R
the line-level inputs on the woofer is "On."
LINE LEVEL IN
subwoofer.
Note for advanced For LFE use L or R
IMPORTANT: Make sure that users: If your receiver/
the LFE toggle switch on the processor has a built-in low- L
subwoofer is in the "Normal" pass crossover filter for the HIGH
LEVEL
position. Do not use the subwoofer output, then the LFE IN
"LFE" position with Dolby* switch should be set to the R
Pro Logic*-only processors. "LFE" position to bypass the + ­
Note: If your receiver or subwoofer's internal
amplifier has only one sub- crossover.
woofer output jack, then you



Digital Receiver/Processor ­ LFE Connection
Use this installation method the left or right line-level input
for Dolby Digital, DTS® or other on the subwoofer. It makes no
digital surround processors difference which jack you
that have bass-management choose. LEVEL
programming, or for analog Connect each speaker to Min Max

receivers/processors that the corresponding speaker LFE NORMAL

have a filtered subwoofer terminals on your receiver or
output: amplifier. PHASE 0º 180º


IMPORTANT: Make sure that Make sure that you have CROSSOVER
the LFE toggle switch on the configured your surround FREQUENCY
subwoofer is in the "LFE" sound processor for RECEIVER/PREAMPLIFIER 50Hz 150Hz

position. Use the line-level "Subwoofer On" or Subwoofer
input jacks for the Low- "LFE On." The front, Output/LFE L R
Frequency Effects channel. center and surround LINE LEVEL IN
Connect these jacks to the LFE speakers should be For LFE use L or R
output or subwoofer output on set to "Small" or "Large"
your receiver or amplifier. L
depending on their size and HIGH
Note: If your receiver or ampli- frequency response. Consult LEVEL
IN
fier has only one subwoofer your receiver's or processor's R
output jack, you may connect owner's manual. + ­
the subwoofer output on your
receiver/preamplifier to either


6
E150P
OPERATION
Power
When the unit is plugged in Note: It will take several min- sumption is minimal when the
and the power switch is on utes for the LED to turn from subwoofer is not receiving a
and no signal is received, the green to red after the input signal. Of course, the sub-
LED on the top of the unit will signal to the subwoofer is woofer can be turned off,
turn red. When a signal is removed. Due to JBL's unique whenever desired, if you do
present, the LED will turn high-output, high-efficiency not wish to leave it in auto
green. amplifier design, power con- (standby) mode.




Level Control
The subwoofer Level Control size, subwoofer placement,
adjusts the volume of the type of main speakers and
subwoofer relative to the rest position. Adjust the subwoofer
of the system. Proper level level so that the volume of the
adjustment depends on sev- bass information is pleasing
eral variables such as room to you.



Crossover Adjustments
The Crossover Frequency
Control determines the highest
LEVEL
Max
frequency at which the sub-
Min

LFE NORMAL woofer reproduces sounds. If
PHASE 0º 180º
your main speakers can com-
fortably reproduce some low-
CROSSOVER
FREQUENCY
150Hz
frequency sounds, set this
50Hz

control to a lower frequency
L R
setting, between 50Hz and
LINE LEVEL IN

For LFE use L or R
100Hz. This will concentrate
L
the subwoofer's efforts on the
HIGH
LEVEL
ultradeep bass sounds
IN

R required by today's films and
+ ­ music. If you are using smaller
bookshelf speakers that do not
ON OFF
120V extend to the lower bass fre-
POWER 60Hz
quencies, set the low-pass
crossover control to a higher
setting, between 120Hz and
Northridge E Series 150Hz. This control is not used
CAUTION
RISK OF ELECTRIC SHOCK
when the LFE switch is in the
DO NOT OPEN

"LFE" position.




7
E150P
Phase Control



The Phase Control determines bass output at the listening If at some time in the future
whether the subwoofer's pis- position. you happen to rearrange your
ton-like action moves in and Remember, every system, listening room and move your
out in phase with the main room and listener is different. speakers, you should experi-
speakers or opposite the There are no right or wrong ment with the phase switch in
main speakers. There is no settings; this switch offers the both positions, and leave it in
correct or incorrect setting. added flexibility to adjust your the position that maximizes
Proper phase adjustment subwoofer for optimum per- bass performance.
depends on several variables formance for your specific
such as subwoofer placement listening conditions without
and listener position. Adjust having to move your speakers.
the phase switch to maximize


TROUBLESHOOTING
If you used the high-level If there is low (or no) bass If you used the line-level
(speaker) inputs and there output: inputs and there is no sound
is no sound from any of the · Make sure the connections from the subwoofer:
speakers: to the left and right "Speaker · Check that the receiver/
· Check that the receiver/ Inputs" have the correct amplifier is on and a source is
amplifier is on and a source polarity (+ and ­). playing.
is playing. · Make sure that the sub- · Check that the powered
· Check that the powered woofer is plugged into an subwoofer is plugged into an
subwoofer is plugged into active electrical outlet and active electrical outlet and is
an active electrical outlet switched on. switched on.
and is switched on. · Adjust the crossover point. · Check all wires and
· Check all wires and connec- · Flip the Phase Control switch connections between the
tions between the receiver/ to the opposite position. receiver/amplifier and the
amplifier and the speakers. subwoofer. Make sure all
· If you are using a Dolby
Make sure all wires are con- wires are connected. Make
Digital/DTS receiver or
nected. Make sure none of sure none of the wires are
processor, make sure that the
the speaker wires are frayed, frayed, cut or punctured, or
subwoofer adjustments on
cut or punctured, or touching touching each other.
the receiver/processor are
each other, except for the · Review proper operation of
set up correctly.
wires for the front left and your receiver/amplifier.
right speakers, which may be · Slowly turn the Level Control
clockwise until you begin to · Slowly turn the Level
joined with the wires for the
hear the desired amount of Control clockwise until you
subwoofer at the receiver/
bass. begin to hear the desired
amplifier end only, if you are
amount of bass.
using the speaker-level
connections · Make sure that you have
· Review proper operation configured your receiver/
of your receiver/amplifier. processor so that the sub-
woofer/LFE output is on.




8
15 6 7 10 17
E150P Amplifier ­ Not for Sale


Exploded View

14




9
11 16 12 8
13

Ref# Part Number Description Qty

1 350883-001 MANUAL, OWNER-E150P/E250P 1
2 350884-002 CARTON,MASTER-E150P (BEECH MODEL) 1
350884-001 CARTON,MASTER-E150P (BLACK MODEL) 1
350884-003 CARTON,MASTER-E150P (CHERRY MODEL) 1
3 350885-001 PAD,END,TOP-E150P 1
4 350885-002 PAD,END,BOT-E150P 1
5 338381-001 WARRANTY CARD,1/5YR,JBL 1
6 351348-001 PLATE,LED/LOGO-E150P/E250P 1
7 338125-002 ASY,LED-E150P/E250P 1
8 336486-001 ASY,FOOT,PLSTC- E150P 4
9 763-31110-40 SCREW, 8 X 2 1/2,TR,PH,PB,BLK ZINC,LCS (FOOT) 4
10 908302-012 SCREW, PB,HXS,#6x.75,ZINC (LOGO PLATE) 4
11 903802-016 SCREW, PB,HXS,#8x1",ZINC (WOOFER) 8
12 338127-002 ASY, WOOFER,10" DCR 5.8 1
13 336804-001 ASY, PORT TUBE 1
14 351219-001 ASY, GRILLE, BLK, FRNT 1
15 333249-003 CUP,GRILLE,TITANIUM, (BEECH MODEL) (CHERRY MODEL) 4
333249-001 CUP,GRILLE (BLACK MODEL) 4
16 351242-001 RING,TRIM,10"-E150P 1
17 903401-012 SCREW, 6 X 3/4,PAN,PH,PB,BLK ZINC,LCS (AMPLIFIER) 10


9
E150P


TEST SET-UP AND PROCEDURE




General Function
UUT = Unit Under Test

1) Connect one line level input cable (RCA) from signal generator to either Right or Left Level input on UUT. LEVEL
control should be full counterclockwise (MIN). Make sure the LFE/Normal switch is in the NORMAL position.
2) Turn on generator, adjust to 100mV, 50Hz.
3) Plug in UUT; Turn Main Power switch ON. LED's on the top panel may be either Red or Green. Turn LEVEL control
full clockwise (MAX). Low Pass control should be set fully clockwise (150Hz).
4) LED should turn Green; immediately bass response should be heard and felt from port tube opening.
5) Turn off generator, turn LEVEL control fully counterclockwise (MIN), disconnect RCA cables.
6) Connect one pair of speaker cables to either high level input terminal on UUT. Cables should be connected to an
integrated amplifier fed by the signal generator.
7) Turn on generator and adjust so that speaker level output is 1.0V, 50Hz. Turn LEVEL control full clockwise (MAX).
8) Green LED should light, immediate bass response should be heard and felt from the port tube opening.

Sweep Function

1) Follow steps 1-4 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 driver and test.

Driver Function

1) Remove driver from cabinet; detach + and - wire clips.
2) Check DC resistance of driver; it should be 5.8 ohms.
3) Connect a pair of speaker cables to driver terminals. Cables should be connected to an integrated amplifier fed by a
signal 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.


10
E150P




11
E150P




TECH TIPS
Troubleshooting tips and solutions to common service problems

For models: E150P,E250P and PB10,PB12 (Revision 2) * TIP# JBLTT2003-04 Rev1


Subject: Replacing MOSFETS Q18, Q22

In the event you need to replace MOSFET transistors Q18 or Q22 as part of a repair, it is important to use

ONLY the JBL part# FE106401110 or only the brands: International Rectifier, or Fairchild.

Replace both Q18 and Q22 MOSFET's in the circuit, even if only one seems to be damaged.

Do NOT mix & match these components from different manufacturers, or batches. They should be

identical.




* Late version PB10 or PB12 subwoofers (Revision 2 in the service manual) can be identified by:
· Amplifier serial number starts with "HA"
· Output transistors in the open, on a large black heatsink
· Large plastic cup enclosing the rear of the amp assembly
· Main PCB, bottom, solder-side contains all SMD devices




12
E150P


DETAILED TROUBLESHOOTING

A. Power Amp Section

Resistance from S+ (SPK O/P) to GND should be >1M (NO LOAD)
Resistance
Check
Resistance from V+ (C6 P+) to V- (C8 P-) gradually Fully CHARGED should read >10k
Resistance from V+ (C6 P+) to S+ (SPK O/P) should read >1M
Resistance from V- (C8 P-) to S+ (SPK O/P) should read >1M



2. Power Up LED RED

With a 5mV signal to Low level input, LED should change to GREEN

-Voltage measurements (DVM)

OP AMP
LED P-U4(1) P-U4(7)
RED 0Vrms 8VDC
GREEN 6.3Vrms -10.7VDC


3. D.C. Operation

-Voltage measurements (DVM) on CLASS D POWER AMP

Between V+ Q4(E) Q1(C) Q10(C) U7(1) U7(2) U7(4) U7(6) U7(7) U7(8)
And This
GND V- GND GND GND GND GND GND GND GND
Point
Get this
45.9V 0V -45.9V 0V -45.9V -45.7V -45.5V 0V 0V 4.7V
Reading


4. Check Switching Frequency


· Oscilloscope - USE THE PROBE TIP TO U6(7) TO GND

· Reading 100kHz +/-10%,22Vp-p


B. Pre Amp Section

Line Level Input Sensitivity

-Set up Turn level, X'OVER FREQ POT Fully CW and LFE switch off
Generator Set at 100mV@50Hz
Signal to Line level input




13
E150P


DETAILED TROUBLESHOOTING (CONT'D)

- Voltage measurements

OP AMP SPEAKER
U2(1) U2(14) U2(8) U3(7) U3(1) U3(14) U3(8) U5(7) U5(1) O/P
133.6mV 200.2mV 245.9mV 314.8mV 314.9mV 350mV 1.67V 1.452V 2.098V 15.3V




2. High Level Input Sensitivity
-Set up Turn level, X'OVER FREQ POT Fully CW and LFE switch off
Set Generator at 1.15V@50Hz
Signal to High level input

-Voltage measurements 15.3V at speaker output


3. Low-Pass

-Set up Set Generator at 100 mV@100Hz
Signal to Line level input
Measure voltage at S+ speaker output

-Voltage measurement

X'OVER FREQ. Setting Output
CW 10.72V
CCW 2.165V

4. LFE

-Set up Set Generator at 100mV@200Hz
Signal to Line level input
Measure voltage at S+ speaker output

LFE switch Setting Output
Normal 2.9V
LFE 7.62V



See flow chart next page for diagnostics.




14
E150P


DETAILED TROUBLESHOOTING (CONT'D)
FLOW CHART

CAUTION : SPEAKER OUTPUT IS FLOATING AND IS NOT PROTECTED AGAINST A SHORT
TO GROUND. ALL TEST INSTRUMENTS CONNECTED TO THE OUTPUT MUST
BE FLOATING. ATTACH THE SCOPE PROBE TIP TO S - and REFERENCE
LEAD TO S+.

(A 10mV signal may need from the input to trigger the Switch turn on)
START



Resistance check
(no load)
between V+ V-, Check +/-15V-MOD
V+ O/P,V- O/P +/-15V voltage at
and O/P to GND U 6(8),U6(4)
is > 10K
Check
no FB1,FB2,C45,
no OK C50,C60,C63,
Replace
R81,R82
OK Q18,Q22
yes
yes
I/P:10mv/50HZ
Power up with no Check +15V/SW
signal input Q4(E) TO V-
LED RED 15V

no
no Discharge C37, OK
Check
Check fuse MUTE(-10.7V),
OK transformer, L4, And
yes
yes rectifier, C6 and C8 Q24,Q25,Q26
Check
Check Q4(E) U7(1) = -33V
TO V-
= 0V D.C.

no Check
no Check OK U7,Q16,Q17,
OK MUTE(+8V) and Q20,Q21,R87,
Q24,Q25,Q26 yes D26,D35,C64
yes
Use scope to
Use scope to check check O/P U7(6)
switching and GND
frequency U6(7) 90Vp-p square
100KHz wave shown
+/-10% , ~22Vp-p
no
OK
no
OK yes

yes Check
L2,L3,C71,C72,
CLASS D AMP OK C73,C74
END



15
E150P




16
E150P




17
E150P




18
E150P




19
E150P

E150P Electrical Parts List
Part Number Description Reference Designator Qty

Resistors


020-000498-120 Carbon Film 0R 1/4W J R10,11 2
021-100401-120 MOF Resistor 1K 1W J R103 1
021-820303-020 MOF Resistor 820R 3WS J 8x20 R6,9 2
022-500003-020 KNP Resistor 0R05 3WS J FK TYPE R104 1
024-100298-120 SMD Resistor 10R 1/8W J 0805 R81,82 2
024-100398-120 SMD Resistor 100R 1/8W J 0805 R62 1
024-100498-120 SMD Resistor 1K 1/8W J 0805 65,79,83,92,95,96,105,108 8
024-100598-120 SMD Resistor 10K 1/8W J 0805 R2,37,54,58,63,69,71,72,74 9
024-100698-120 SMD Resistor 100K 1/8W J 0805 R3,112,22-25 6
024-110598-100 SMD Resistor 11K 1/8W F 0805 R98 1
024-113598-100 SMD Resistor 11K3 1/8W F 0805 R34 1
024-120498-120 SMD Resistor 1K2 1/8W J 0805 R51,53 2
024-130498-100 SMD Resistor 1K3 1/8W F 0805 R35,110 2
024-137598-120 SMD Resistor 13K7 1/8W F 0805 R42,43 2
024-137698-100 SMD Resistor 137K 1/8W F 0805 R32 1
024-150498-120 SMD Resistor 1K5 1/8W J 0805 R67,68,12-15 6
024-150598-120 SMD Resistor 15K 1/8W J 0805 R29 1
024-200598-120 SMD Resistor 20K 1/8W J 0805 R94 1
024-220398-120 SMD Resistor 220R 1/8W J 0805 R90 1
024-220498-121 SMD Resistor 2K2 1/8W J 0805 R1,87,61 3
024-220598-120 SMD Resistor 22K 1/8W J 0805 R50,52,118 3
024-220798-120 SMD Resistor 2M2 1/8W J 0805 R80,121 2
024-237598-120 SMD Resistor 23K7 1/8W F 0805 R48 1
024-237698-100 SMD Resistor 237K 1/8W F 0805 R45 1
024-243698-100 SMD Resistor 243K 1/8W F 0805 R36 1
024-270498-120 SMD Resistor 2K7 1/8W J 0805 R64,73 2
024-300398-120 SMD Resistor 300R 1/8W J 0805 R55 1
024-300598-120 SMD Resistor 30K 1/8W J 0805 R56 1
024-330498-120 SMD Resistor 3K3 1/8W J 0805 R7,8,59 3
024-330598-120 SMD Resistor 33K 1/8W J 0805 R4,5,122 3
024-332498-100 SMD Resistor 3K32 1/8W F 0805 R26,27 2
024-360498-120 SMD Resistor 3K6 1/8W J 0805 R28 1
024-390498-120 SMD Resistor 3K9 1/8W J 0805 R93 1
024-390598-120 SMD Resistor 39K 1/8W J 0805 R77 1
024-430498-100 SMD Resistor 4K3 1/8W F 0805 R78 1
024-453598-100 SMD Resistor 45K3 1/8W F 0805 R30 1
024-470298-120 SMD Resistor 47R 1/8W J 0805 R101,102 2
024-470398-120 SMD Resistor 470R 1/8W J 0805 R76,99,100 3
024-470498-120 SMD Resistor 4K7 1/8W J 0805 R85,86 2
024-470598-120 SMD Resistor 47K 1/8W J 0805 R44,47,49,107 4
024-470698-120 SMD Resistor 470K 1/8W J 0805 R70 1


20
E150P

Part Number Description Reference Designator Qty


024-470798-120 SMD Resistor 4M7 1/8W J 0805 R60 1
024-560498-120 SMD Resistor 5K6 1/8W J 0805 R40,41 2
024-604598-100 SMD Resistor 60K4 1/8W F 0805 R39 1
024-620398-120 SMD Resistor 620R 1/8W J 0805 R16,18,57 3
024-680498-120 SMD Resistor 6K8 1/8W J 0805 R46,91 2
024-680598-120 SMD Resistor 68K 1/8W J 0805 R31,33,66 3
024-909498-100 SMD Resistor 9K09 1/8W F 0805 R38 1
025-010300-000 Thermister TSE-103 K L:50mm 1
026-200595-269 Freq Pot 20K PN:RD163121R03D-20KBx2(EJ) VR2 1
026-500495-252 Level Pot 5K PN:RK163111R52B-5KA (EJ) VR1 1


Capacitors


031-100244-100 Ceramic Capacitor 0u01/50V K 0805 X7R C5,10,33,45,51,66,67 7
031-100343-100 SMD Capacitor 100pF/50V J 0805 NPO C36,58,16 3
031-100344-100 SMD Capacitor 0u1/50V K 0805 X7R C11,42-44,46-49,52,54,55,60,63,71,74,77 16
031-100384-100R SMD Capacitor 0u1/250V K 1206 X7R C3,7 2
031-150244-100 SMD Capacitor 0u0015/50V K 0805 X7R C32 1
031-220344-100 SMD Capacitor 220pF/50V J 0805 NPO C20,21,19,14,15 5
031-330444-300 SMD Capacitor 3300pF/50V K 0805 X7R C40,34 2
031-470244-102 SMD Capacitor 0u047/50V K 0805 X7R C62,59 2
031-560243-100 SMD Capacitor 56pF/50V J 0805 NPO C57,61 2
031-560343-102 SMD Capacitor 560pF/50V J 0805 NPO C56 1
032-100464-202 Mylar Capacitor 1uF/100V K P:10 C70,70B 2
033-470444-270 NPE Capacitor 4u7/50V K10 (R)8x13 SBE C73 1
033-680464-270 NPE Capacitor 6u8/100V K10 (R)1020 GNE C72 1
034-100525-300 Electrolytic Capacitor 10uF/25V M (R)0511 P:5 C35 1
034-100625-300 Electrolytic Capacitor 100uF/25V M (R)6.3x11 P:5 C64 1
034-220525-301 Electrolytic Capacitor 22uF/25V M (R)5x11 P:5 C39,50,53,41,4,9 6
034-220615-301 Electrolytic Capacitor 220uF/16V M (R)0611 P:5 C37 1
034-330525-300 Electrolytic Capacitor 33uF/25V M (R)0511 P:5 C1 1
034-330615-300 Electrolytic Capacitor 330uF/16V M (R)0812 P:5 C12,78 2
034-470415-301 Electrolytic Capacitor 4u7/50V M (R)0511 P:5 C2 1
034-470615-301 Electrolytic Capacitor 470uF/16V M (R)0812 P:5 C65 1
034-470745-200 Electrolytic Capacitor 4700uF/50V M (R)2236 C6,8 2
038-100363-300 MPE Capacitor 0u1/100V J C68,69,27 3
038-220393-300 MPE Capacitor 0u22/63V J C25-26,29,31 4
038-330393-300 MPE Capacitor 0u33/63V J C22,23,24 3
038-470293-300 MPE Capacitor 0u047/63V J C28,30 2
039-100384-100 Safety Capacitor HQX0.1K275VACx2 18x6x12mm CXAC1 1

Semiconductors


051-000600-100 NPN Transistor PN:MPSW06RLRA TO-92 Q2,Q16 2
051-003100-000 NPN Transistor PN:TIP 31C TO-220 (MOSPEC) Q4 1
051-005600-100 PNP Transistor PN:MPSW56RLRA TO-92 Q3 1


21
E150P

Part Number Description Reference Designator Qty


051-222200-100 NPN Transistor PN:MPS2222ARLRA TO-92 Q21 1
051-290700-100 PNP Transistor PN:MPS2907A RLRA TO-92 Q19,23 2
051-540101-000 PNP Transistor PN:2N5401 TO-92 Q1 1
051-555100-000 NPN Transistor PN:2N5551 TO-92 Q17 1
051-640001-000 MOSFET N-Channel PN:IRF640N TO-220 (IR) Q18,22 2
052-400080-000 Bridge Regulator PN:RS804 400V,8A BR1 1
053-211100-000 IC;DIP,Driver PN:IR2111 Half-Bridge Driver U7 1
054-000100-100 SMD DIODE PN:ES1D 200V 1A D5,26,29,33,38 5
054-001002-100 SMD ZENER DIODE PN:BZX84C10 10V SOT-23 D35 1
054-001501-100 SMD ZENER DIODE PN:BZX84C15 15V SOT-23 D6,7,9 3
054-007200-100 SMD IC; (Dual OP-Amp) PN:TL072CDR SO-8 U5,6 2
054-007400-100 SMD IC;(Quad OP-Amp) PN:TL074CDR U2,3 2
054-011400-100 SMD Transistor PN:DTC114TKA SMT3 Q7 1
054-033904-100 SMD Transistor PN:MMBT3904LT1 SOT23 Q11,14,13,5,8,9 6
054-033906-100 SMD Transistor PN:MMBT3906LT1 SOT23 Q6,10,12,15 4
054-045580-100 SMD IC; (Dual OP=Amp) PN:NJM4558M-TE3 DMP-8 U4 1
054-050601-100 SMD ZENER DIODE PN:BZX84C5V6 5.6V SOT-23 D24,36,37 3
054-414803-100 SMD DIODE PN:LL4148 (Wishay) D1-4,8,10-23,27,30 21
054-540100-100 SMD Transistor PN:MMBT5401 LT1 SOT-23 Q20,24,26 3
054-555100-100 SMD Transistor PN:MMBT5551 LT1 Q25 1
050-505200-001 LED PN:LT-2402-21 D1B 1


Miscellaneous


065-050400-000 Sleeve 3.5mm BLK F32 (125 )
065-100200-000 UL Sleeve 2.5 F32-2.5(blk) 125
082-022640-000 Wire Set #26 UL1007 L=400mm blk/wht 2P Housing +5TT
091-000182-000 LED Holder PN:LED5-2A
041-115001-000 Bead Coil YT-10911 L5 1
042-010052-003 Transformer YT-10615-4 PT1 1
043-300101-000 Inductor 30uH YT-10033 L2 1
043-324300-000 Inductor 324uH YT-10778 L4 1
043-560200-000 Inductor 56uH YT-10779 L1