JBL ESC-350-SOURCE Service manual
SOURCE
Dolby Pro-Logic Surround
Processor/CD Player/Tuner
(Part of the ESC350 & 550 Systems)
SERVICE MANUAL
Power
Open
CD
AM/FM
TV
Tape/Aux
Random
Repeat
Auto Tune
Stereo/Mono
Rear
Speakers
-+Bass -+Treble
Surround Mode
Tuner Presets
Auto
Volume
Skip
Search
Tune
Add
Delete
JBL Consumer Products Inc.
250 Crossways Park Drive
Woodbury, N.Y. 11797
1-800-336-4JBL in the USA
A Harman International Company
Part No.: 1112-SOURCE Rev A 4/99
Dolby Pro-LogicÒSurround Processor/CD Player/Tuner SOURCE
LASER BEAM SAFETY PRECAUTIONS
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Dolby Pro-LogicÒSurround Processor/CD Player/Tuner SOURCE
SAFETY PRECAUTIONS
2
Dolby Pro-LogicÒSurround Processor/CD Player/Tuner SOURCE
TABLE OF CONTENTS
LASER BEAM SAFETY PRECAUTIONS......................1
SAFETY PRECAUTIONS ..............................................2
TABLE OF CONTENTS.................................................3
FEATURES.....................................................................3
SPECIFICATIONS..........................................................3
SERVICE BULLETIN .....................................................4
CONTROLS AND THEIR FUNCTION...........................6
CONNECTIONS .............................................................7
DISASSEMBLY PROCEDURE ......................................8
TROUBLESHOOTING ...................................................8
ADJUSTMENT PROCEDURE .....................................11
SOURCE BLOCK DIAGRAM.......................................12
SOURCE MECHANICAL EXPLODED VIEW..............13
FEATURES
MECHANICAL PARTS LIST........................................14
SOURCE PACKING EXPLODED VIEW .....................15
SOURCE ELECTRICAL PART LISTS ........................16
SOURCE MAIN PCB, HEADPHONE PCB, LED PCB22
SOURCE CONTROL PCB, LED PCB.........................23
SOURCE CD DECODER PCB, VOLUME PCB .........24
SOURCE PRO-LOGIC PCB ........................................25
SOURCE INTEGRATED CIRCUIT DIAGRAMS .........26
SOURCE WIRING DIAGRAM .....................................32
SOURCE MAIN PCB, PRO LOGIC PCB,
CONTROL PCB (SCHEMATIC #1) .............................33
CONTROL/DISPLAY (SCHEMATIC #2)......................34
SOURCE (SCHEMATIC #3) ........................................35
n Built-in CD player with: Dolby Pro Logic surround processor, Dolby 3 stereo, 8x Oversampling
n AM/FM tuner with 32 presets, Auto-preset function.
SERVICE NOTE: THE ESC350 or 550 SUBWOOFER IS REQUIRED TO TEST OR
PLAY “THE SOURCE” IN EITHER SYSTEM.
SPECIFICATIONS
AMPLIFIER SECTION
Signal to Noise Ratio
AUX ....................70dB
THD (1 KHz) .................0.1%
Head Room ................>15dB
FM TUNER SECTION
Frequency Range .........87.5MHz - 108.0MHz
26dB Usable Sensitivity .............10uV
Signal-to-Noise Ratio...............55dB
I-F Rejection ..................65dB
Image Rejection .................40dB
Limiting (-3 dB) .................15uV
Stereo Separation (1 KHz) ............30dB
AM TUNER SECTION
Frequency Range ..........520MHz - 1710kHz
20dB Usable Sensitivity ...........1000 uV/m
Signal-to-Noise Ratio...............40dB
I-F Rejection ..................40dB
Image Rejection .................20dB
AGC Figure of Merit ...............40dB
Selectivity....................25dB
I-F Whistle....................10%
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Dolby Pro-LogicÒSurround Processor/CD Player/Tuner SOURCE
SERVICE BULLETIN
Service bulletin JBL9704 - July 1997
To: All JBL Service Centers
Models: ESC550 - The Source
Subject: Surround level changes during CD search mode
In the event you receive a ESC550 system (including the Source) with the complaint that the
surround level (rear channel volume) changes during the CD search mode:
Procedure:
1) Lay unit face down. Remove the 5 Phillips screws holding the upper & lower case together;
separate cases.
2) Locate C707 (.022uf 50v cap.) on the main PCB in the bottom case.; replace with 470uf 10v
electrolytic capacitor (JBL# 3479347121). Observe polarity
connector CN702. It should be possible to cut the original cap off the board and re-solder the
replacement without removal of the main PCB. See drawing.
; negative terminal should be closest to
3) Locate solder pads for connector CN702 on the Control PCB in the upper case, near the
headphone jack. Adjacent to the slot cut in the PCB for the 11 conductor cable, solder a .01uf
ceramic cap (JBL# 3519103935) to pins 8 and 11 on the solder pads. See drawing.
4) Re-assemble unit; test as follows:
a) Plug in unit, assure all cable and speaker connections are intact. Insert CD of choice.
b) Turn power ON to the Source and the Bass550 subwoofer; (display on the Source
should now be active).
c) Toggle “surround mode” button on front panel or with remote control until “NORMAL”
appears.
e) Adjust volume (on the Source) so display reads “VOLUME 30”.
d) Press PLAY button on the Source or the remote control.
e) Press the SEARCH/TUNE button on the Source or the remote control to search up or
down selected track.
Model Serial number Action Correction
Replace C707 with 470uf 10v cap.
Add .01uf cap. to pins8&11of
CN702
ESC550 (Source) Under 11500
Jumps randomly to surround
(rear) channel level during CD
search mode
ESC550 (Source) 11500 and higher Modified by factory NONE REQUIRED
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Dolby Pro-LogicÒSurround Processor/CD Player/Tuner SOURCE
5
Dolby Pro-LogicÒSurround Processor/CD Player/Tuner SOURCE
CONTROLS AND THEIR FUNCTION
1. Volume - Turning this knob clockwise or pressing “+”
on the remote will increase the volume. Turning the knob
counter clockwise or pressing “-” on the remote will
decrease the volume.
2. Mute - Pressing this button will mute the volume.
3. Bass - To raise and lower the bass level press these
“+” and “-” buttons. See number “5. Calibration” for the
same adjustments via the remote.
4. Treble - To raise and lower the treble level press
these “+” and “-” buttons. See number “5. Calibration” for
the same adjustments via the remote.
5. Calibration - This button operates the calibration of
the “Bass”, “Treble”, Balance and Center Channel
Volume. Press this button until the desired object for
calibration (e.g. Bass) appears in the display. Press the
“+” to increase and the “-” to decrease.
6. Play/Pause - Pressing this button will cause the CD
to begin playing. Pressing it will a CD is playing will
pause the CD until it is pressed again allowing the CD to
continue playing.
7. Skip - Pressing “Back” or “Forward” will cause the
CD to skip backward or forward to the next track.
8. Scan - Pressing “Back” or “Forward” will cause the
CD to scan backward or forward with in the existing track
being played. In the tuner mode these buttons tune the
receiver to the next station, backwards or forwards.
9. Stop - Pressing this button will the stop the CD
operation.
10. Open - This button will open the CD holder door.
11. Random - Pressing this button will cause the CD to
be played in random order.
12. Repeat - Pressing this button will cause the CD to
begin again when finished.
13. AM/FM - This button allows the switching between
the AM and FM selection of the tuner. This button also
switches the unit back to the tuner mode when in the CD,
TV or Aux modes.
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Dolby Pro-LogicÒSurround Processor/CD Player/Tuner SOURCE
14. Power - Press this button to turn on the “Source”.
NOTE: The Source must be connected to the Bass550
subwoofer with its main power switch ON to operate.
15. CD Operation - Pressing this button will place the
“Source” in CD playing mode.
16. TV Operation - Pressing this button will place the
“Source” in TV operation mode.
17. Tape/Aux - Pressing this button will place the
“Source” in Auxiliary mode. This is used when you have
another input source connected such as a tape player.
18. Surround Mode - Pressing this button will allow you
to pick between 3 different mode settings: Dolby
Pro-Logic , Dolby Pro-Logic Phantom mode and
2-channel (stereo) mode.
19. Tone - This button is used to test and calibrate the
performance of the system.
20. Sleep - This Button is used to turn the unit off
automatically after a selected amount of time in 10
minute increments up to 90 minutes.
21. Auto Tune - Pressing this button, and then pressing
either of the “Search/Tune” buttons (See #8) backward or
forward will cause the “Source” to tune to the next strong
signal.
22. Stereo/Mono - Pressing this button will play the
selected station without any stereo separation.
23. Rear Speakers - Pressing this button while listening
in either Surround Modes will turn off the surround
speakers.
24. Tuner Presets - Pressing “Auto” for a full second
will cause the tuner to scan for strong signals and place
up to 32 stations in memory as preset stations. To move
across these preset stations press “Skip” (See #7) either
forward or backward. Pressing “Add” will add to the
preset stations the signal presently tuned. Pressing
“Delete” will delete from the preset stations the signal
presently tuned.
25. Headphone Jack - Connect a set of headphones
with stereo mini-phono plug here for private listening.
CONNECTIONS
26 27 28 29 30 31 32
L
R
Out
26. ESC550 Cable Connector - Plug the ESC550 cable
in here and the other end into the Bass550 subwoofer.
27. Tape/Aux In/Out - Connect Tape Player or Auxiliary
equipment here. The Output jacks are a Stereo fixed
level signal.
28. (A) TV Connection - Connect the dual RCA stereo
cable from the output of a television set here.
In A B
Tape/AuxPowered Subwoofer TV Antenna
or
US Europe
Tuner
Frequency
Standard
FM
75Ω
AM
Loop
30. Tuning Frequency - This switch determines whether
the tuning standard is set for US or European standard
reception.
31. FM Antenna - This is the connection for the FM
cable antenna.
32. AM Antenna - This is the connection for the AM loop
antenna.
29. (B) TV Connection - Connect the stereo mini-phone
jack from the output of a television set here.
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Dolby Pro-LogicÒSurround Processor/CD Player/Tuner SOURCE
DISASSEMBLY PROCEDURE
1) Lay unit face down. Remove the 5 Phillips screws
holding the upper & lower case together; separate cases.
2) Remove as many molex connectors as necessary to
separate case halves; do not mix up connectors during
reassembly. Label if necessary.
TROUBLESHOOTING
PROBLEM SOLUTION DETAILS
DISPLAY BRIGHTNESS
UNEVEN
HUM IN CD MODE (1) Add 470uf 16v Cap. (PRE3952-471)
CD PLAY INTERMITTENT ONE CHANNEL DEAD
Cut out R364 & R367 on CONTROL
PCB
in parallel with ZD401 on MAIN PCB;
observe polarity (see drawing)
(2) Replace C472 (47uf 16v) with 470uf
16v cap. (PRE3952-471)
Add insulated jumper wire near IC802 on
CD DECODER PCB pin #67 and pad
exiting from corner of IC - ground. (see
illustration)
470 f
16V
µ
ZD401
CD PLAY INTERMITTENT On MAIN PCB, cut out C721
CD PLAY INTERMITTENT DISPLAY BLINKING
On CONTROL PCB,
(1) Cut out jumper J015 and R368
(2) Replace existing part Q313 with
2SD882P NPN Transistor
(RHN0882-001)
(3) Solder 2 pcs. Diode IN41418
(RAD4148-001) in parallel with ZD301
(see illustration). Observe all polarities.
(4) R364 insert and solder a 2.4 ohm
resistor (or two 4.7 ohm [QAF0450-479]
in parallel)
(5) R363 insert and solder a 2.2K ohm
resistor (QAF0650-222)
R362
R362
R368
J015
J015
1
DELETE
J015 & R368
R367
R367
Q313
Q313
4
R364 INSERT
1
2.4K / WΩ
J004
ZD906
R364
R364
R363
R363
ZD301
1
RB901
Q313
2
INSERT
2SD882
3
RB902
4
R363 INSERT
1
2.2K / WΩ
6
ZD301
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Dolby Pro-LogicÒSurround Processor/CD Player/Tuner SOURCE
LCD DISPLAY FLICKERS &
CD TRACKS ADVANCE BY
THEM SELVES
DISPLAY STAYS ON WHEN
POWER OFF
(1) On the MAIN PCB, add insulated
jumper from R901 (nearest C909)(+) to
R902 (nearest jumper J103).
(2) Cut out R901 (1 ohm resistor)
On the MAIN PCB, change R719 (10k
ohm resistor) to 1k ohm (QAF0650-102)
CD FUNCTION (PLAY,
TRACK UP) CHANGES TO
TV BY ITSELF
GOES TO STANDBY MODE
BY ITSELF WHEN PLAYING
CD’s
On the MAIN PCB, short pins 60 & 61
on IC701 together by solder or jumper
wire.
(1) On the MAIN PCB, add insulated
jumper from R901 (nearest C909)(+) to
upper hole in PCB (near C912 and
nearest plastic rivet) PCB will have to
be removed and soldered at the rear.
(2) Cut copper trace joining JW100 and
CN804 at rear of PCB (see illustration)
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Dolby Pro-LogicÒSurround Processor/CD Player/Tuner SOURCE
WHEN CD PLAYER WARMS
UP IT STOPS IN PLAY MODE
GAP BETWEEN CD DOOR
AND TOP OF CABINET
RUBBING NOISE DURING CD
PLAY MODE
CD STUCK DURING PLAY
MODE
(1) On CD DECODER PCB, attach a
heatsink (w/adhesive) to IC803
(KA9258D)
(2) To avoid contact with heatsink on the
MAIN PCB, cut TP01 & TP02 shorter
(same height as IC101); push down
C129, C119, & C120.
FOLLOW DIRECTIONS IN
ILLUSTRATION
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Dolby Pro-LogicÒSurround Processor/CD Player/Tuner SOURCE
ADJUSTMENT PROCEDURE
Test Conditions
AM
(Amplitude Modulation)
Function.......................................................................AM
Input Level ............................................74dB/m (5mV/m)
Generator...................................Modulation 30%, 400Hz
Signal or Sweep Generator
Step
Connection Frequency
Reception
Frequency
Test Condition
FM
(Frequency Modulation)
Function.......................................................................FM
Input Level ................................................60dB/m (1mV)
Generator .................................Deviation 22.5kHz, 1kHz
Output Indicator
Connection
Adjustment Adjust For
AM TUNING VOLTAGE
1 No Signal 1710kHz
2 No Signal 520kHz Same as Step 1 L101 1.2+/-0.1V
3 Repeat Step 1 and 2 a few times
DC Digital Voltmeter
JW84
TC102 10.5+/-0.1V
AM IF
AM Loop Antenna at a
4
distance of 24 inch (60cm)
from the IRT Loop
450kHz
Point of
noninterference
IF Sweep Generator
IC101 Pin 12
T101 Flax and Max
AM TRACKING
5 Same as Step 4 620kHz 620kHz
6 Same as Step 4 1400kHz 1400kHz Same as Step 5 TC101 Max
7 Repeat Step 5 and 6 a few times
RF Sweep Generator
R180
L102 Max
FM IF
To the FM antenna
8
terminals through a
matching transformer
10.7MHz
Point of
noninterference
IF Sweep Generator
IC101 Pin 12
T102
T103
Flat and Max
Check Voltage
Between
R109=0V+/-30mV
FM MPX
9 Same as Step 8 98.1MHz 98.1MHz
RF Generator
Q181, Q182 “C”
SR03 Max Separation
11
Dolby Pro-LogicÒSurround Processor/CD Player/Tuner SOURCE
SOURCE BLOCK DIAGRAM
12
Dolby Pro-LogicÒSurround Processor/CD Player/Tuner SOURCE
SOURCE MECHANICAL EXPLODED VIEW
13
S
N
ABC DEGFHIJKLM
N
1
2
SOURCE
MECHANICAL
3
4
5
EXPLODED VIEW
S4
29
7
8
S3
59
6
33
1
S5
34
66
S10
60
32
6
35
S9
37
7
S5
50
8
9
65
51
48
41
42
43
S11
S12
S5
36
S1
45
43
44
61
1
11
12
39
S5
S10
10
S5
52
53
55
57
56
64
11
49
12
54
S5
13
62
S11
14
58
ABC DEGFHI
J
40
S5
46
47
KLM
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