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

AM/FM

Tape/Aux

Random

Repeat

Auto Tune

Stereo/Mono

Rear

Speakers

-+Bass -+Treble

Surround Mode

Tuner Presets

Auto

Volume

Skip

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

Dolby Pro-LogicÒSurround Processor/CD Player/Tuner SOURCE

SAFETY PRECAUTIONS

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%

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

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.

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

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

US Europe

Tuner

Frequency

Standard

75Ω

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.

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

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

R368

J015

DELETE J015 & R368

R367

Q313

R364 INSERT

2.4K / WΩ

J004

ZD906

R364

R363

ZD301

RB901

Q313

INSERT 2SD882

RB902

R363 INSERT

2.2K / WΩ

ZD301

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)

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

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

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

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

Dolby Pro-LogicÒSurround Processor/CD Player/Tuner SOURCE

SOURCE BLOCK DIAGRAM

Dolby Pro-LogicÒSurround Processor/CD Player/Tuner SOURCE

SOURCE MECHANICAL EXPLODED VIEW

ABC DEGFHIJKLM

SOURCE MECHANICAL

EXPLODED VIEW

S10

S11

S12

S10

S11

ABC DEGFHI

KLM

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