JBL JSR-400 Service manual

JSR-400

Dolby Pro-Logic Audio/Video

ReceiverSurround

The is part of the

ARC CinemaII

JSR-400

System

SERVICE MANUAL

JBL Consumer Products Inc.
250 Crossways Park Drive
Woodbury, N.Y. 11797
1-800-336-4JBL in the USA

A Harman International Company

Rev A 10/99

Dolby Pro-LogicÒA/V Receiver JSR-400

JSR400 TABLE OF CONTENTS

COVER...........................................................................1

TABLE OF CONTENTS .................................................2

ARC CINEMA II SPECIFICATIONS ..............................2

SPECIFICATIONS..........................................................3

CONTROLS AND THEIR FUNCTION...........................7

REAR PANEL CONNECTIONS.....................................9

DISASSEMBLY PROCEDURES .................................10

CIRCUIT DESCRIPTION .............................................13

JSR400 PACKING .......................................................17

JSR400 BLOCK DIAGRAM .........................................18

JSR-400 UNIT EXPLODED VIEW ..............................19

JSR-400 ELECTRICAL PARTS LISTS .......................20

SIMPLE TROUBLESHOOTING ...................................26

JSR-400 MAIN PCB ...................................................31

JSR-400 CONTROL PCB ............................................32

JSR-400 TUNER PCB .................................................33

JSR-400 SUB PCBs ....................................................34

WIRING DIAGRAM ......................................................35

INTEGRATED CIRCUIT DIAGRAMS 1-5 ..............36-40

TRANSISTOR DIAGRAMS ..........................................41

JSR-400 SCHEMATIC DIAGRAM

MAIN BOARD...............................................................42

JSR-400 SCHEMATIC DIAGRAM

CONTROL BOARD ......................................................43

JSR-400 SCHEMATIC DIAGRAM
POWER SUPPLY/
VIDEO/TONE/
HEADPHONE/

VOLUME PCB’s ...........................................................44

MORE COMPLEX TROUBLESHOOTING ..................27

TUNER ALIGNMENT ...................................................29

ARC CINEMA II SPECIFICATIONS

Total System Output ..........280watts

Front Channels: ............50watts x 3 @ .1% THD;

Surround Channels:...........25watts x 2 @ .1% THD;

Subwoofer: ..............80watts x1@1%THD

System Frequency Response ......(–6dB) 45Hz – 20kHz

Input Impedance ............20kohms

Input Sensitivity ............220mV

Receiver

Dimensions (HxWxD) ........4-5/8 x 10-1/4 x 9-3/4 inches

....................117x260x248mm

Weight ................5lbs/2.3 kg

JSR-400 SCHEMATIC DIAGRAM

TUNER BOARD ...........................................................45

Occasional refinements may be made to existing products without notice, but will always meet or exceed original
specifications unless other-wise stated.

2

Dolby Pro-LogicÒA/V Receiver JSR-400

SPECIFICATIONS

Measuring methods are based on IHF and IEC standard 268-3

Measurement conditions, unless otherwise noted:

Output resistive load = (8) ohms / Both channels driven
Tone (Base, Treble), Balance, EQ control : Center Position, Other SW’s : OFF
Nominal input level: 5mV for MM, 0.5mV for MC, 500mV for general purpose inputs
Power figures should be kept minimum 10 minutes between 15 and 35°C
Terminator: 100 ohm for MC, 1kohm for MM for MM and general purpose inputs
Filter: IHF-A filter
R/O = Rated Output

Power Supply: 120V, 60Hz

Front Amp Section

NO. DESCRIPTION INPUT FREQ. REMARK UNIT LIMIT L/R NOMINAL L/R L R

10

11

INPUT SENSITIVITY

1

CHANNEL BALANCE

2

RESIDUAL NOISE

4

TOTAL HARMONIC

5

DISTORTION

CONTINUOUS AVERAGE

6

POWER

S/N RATIO, IHF-A FILTER

7

CHANNEL SEPARATION

8

9

FUNCTION CROSSTALK

FREQUENCY RESPONSE
(-3DB)

TONE CONTROL, ±(10)dB

CD 1kHz mV 200±30

MM 1kHz mV

MC 1kHz mV

MIC 1kHz mV

CD

CD

CD (500mV)

CD

CD (500mV)

MM (5mV)

MC (0.5mV)

CD (500mV)

TAPEÝAUX 1/10kHz R/O-3dB dB

AUXÞTAPE 1/10kHz R/O-3dB dB

MMÞCD 1/10kHz R/O-3dB dB

CD (500mV) 1W Hz~kHz 40~20k

CD

1kHz R/O TO -40dB dB ±3

1kHz

1kHz VOL min. mV

1kHz VOL max. mV

(40)Hz R/O / 1W %

1kHz R/O / 1W %

(20)KHz R/O / 1W %

(40)Hz (8)ohms W 50

1kHz (8)ohms W 50

(20)KHz (8)ohms W 50

1kHz R/O dB

1kHz 1W dB

1kHz R/O dB

1kHz 1W dB

1kHz R/O dB

1kHz 1W dB

100Hz R/O-3dB dB

1kHz R/O-3dB dB

10kHz R/O-3dB dB

100Hz 1W dB

10kHz 1W dB

£ 1

£ 1 £0.3
£ 1 £0.3
£ 1 £0.3

³65 ³ 70

³ 45 ³ 55

³ 40 ³ 45
³ 60/40 ³65/45
³ 60/40 ³65/45

± 10± 2 ± 10± 1
± 10± 2 ± 10± 1

200±30

±2

52

52

52

20~50k

3

Dolby Pro-LogicÒA/V Receiver JSR-400

Rear Amp Section

NO. DESCRIPTION INPUT FREQ. REMARK UNIT LIMIT L/R NOMINAL L/R

POWER OUTPUT 0.9% THD

1

TOTAL HARMONIC

2

DISTORTION

S/N RATIO DOLBY

IHF-A FILTER, THEATER

3

FRE RES. (ONLY DOLBY)

4

± 3dB

HALL
STADIUM
CHURCH

CD

CD 1kHz 1W %

CD R/O dB

CD R/O dB

CD R/O dB

CD R/O dB

CD R/O dB

CD 1kHz 1W Hz~kHz 100~6

1kHz (8) ohms W

³ 50 ³52

£ 1 £0.7

³ 60 ³65

³ 60 ³65

80~7

Center Amp Section

NO. DESCRIPTION INPUT FREQ. REMARK UNIT LIMIT L/R NOMINAL L/R

POWER OUTPUT 0.9% THD

1

TOTAL HARMONIC

2

DISTORTION

S/N RATIO IHF-A FILTER

3

FRE RES. LARGE

4

DOLBY MODE SMALL

CD

CD 1kHz 1W %

CD R/O dB

CD 1W Hz~kHz 50~15k

CD 1W Hz~kHz 120~15k

1kHz (8) ohms W

³ 50 ³52

£ 1 £0.3

³ 73 ³78

30~17k

100~17k

Video Section

NO. DESCRIPTION INPUT FREQ. REMARK UNIT LIMIT L/R NOMINAL L/R

OUTPUT LEVEL at 75OHMS

1

FREQUENCY RESPONSE

2

S/N RATIO

3

CROSS TALK

4

VCR1 (1Vp-p) 1MHz Vp-p 1±0.2

VCR1 (1Vp-p)

VCR1 (1Vp-p) 1MHz

VCR1 (1Vp-p)

1MHz

1MHz dB

Hz~MHz DC~6

dB 40

40

1±0.1

DC~6.3

45

45

4

Dolby Pro-LogicÒA/V Receiver JSR-400

TUNER

Measuring methods in conformity with IEC standard 315

Measurement conditions FM:

Radio frequency = 98.1 MHZ,
Audio frequency = 1 kHz
Reference level = 1mV on ( 75ohms, 300ohms)
Test Point: TP 1 = 90.1MHz, TP 2 = 98.1 MHz, TP 3 = 106.1 MHz
Filter = B.P.F at STEREO

Power Supply: 120V, 60Hz

FM Section

NO. DESCRIPTION UNIT LIMIT L/R NOMINAL L/R

MHz 87.5~107.9M

kHz 100

dBf

dBf

dBf

dBf

dBf

dBf

dBf

%

%

dBf

dBf

dBf

dBf

dBf

Hz 30~12.5k

dB

dB

dB

dB

dB

mV

£ 23.2 £17.2
£ 23.2 £17.2
£ 23.2 £17.2

£ 15.2 £12.2

31.2± 5 31.2±3
³ 65 ³72

³ 59 ³70

£ 1 £0.5

£ 1.5 £1

£ 23.2 £20.2
£ 45.2 £43.2

³ 20 ³40
³ 26 ³45
³ 18 ³35

³ 60
³ 60
³ 30
³ 25
³ 55 ³65

500± 200 500± 150

20~15k

³70

³70

³40

³30

10

11

12

13

14

15

TUNING RANGE LOW ~ HIGH

1

STEP AUTO/Man.

USABLE SENSITIVITY TP 1
S/N = 30dB TP 2

2

FULL LIMITING SENSE OUTPUT =

3

-3dB

AUTO STOP LEVEL

4

S/N RATIO MONO

5

IHF-A FILTER STEREO

TOTAL HARMONIC DISTORTION MONO

6

50dB QUIETING SENS. MONO

7

CHANNEL SEPARATION 250Hz

8

FREQUENCY RESPONSE AT ± 1.5dB

9

SPURIOUS RESPONSE

IF REJECTION TP 1

IMAGE REJECTION TP 3

AM REJECTION RATIO

ALTERNATIVE CH SELECTIVITY ± (400)KhZ

OUTPUT LEVEL MONO

TP 3

STEREO

STEREO

1kHz

6.3kHz

5

Dolby Pro-LogicÒA/V Receiver JSR-400

Measuring methods in conformity with IEC standard 315

Measurement conditions AM - MW: Radio frequency = 1000/999kHz

Audio frequency = 400Hz

LW: Radio frequency = 207kHz

Audio frequency = 400Hz
Reference level = 5mV/m, 10mV/m on 50ohms
Modulation = 30%
Test Point: MW TP1 = (600)kHz TP2 = (1000)kHz TP3 = (1400)kHz

LW TP1 = 162kHz TP2 = 207kHz TP3 = 252kHz

AM Section

NO. DESCRIPTION UNIT LIMIT L/R NOMINAL L/R

TUNING RANGE LOW ~ HIGH
MW

1

STEP AUTO/Man.

USABLE SENSITIVITY MW TP 1

S/N = 20dB TP 3

2

S/N RATIO MW

3

TOTAL HARMONIC DISTORTION

4

OVER LOAD DISTORTION 5mV 80% MOD

5

FREQUENCY RESPONSE at -6dB MW

6

SELECTIVITY 10KhZ/9KhZ MW

7

LW

TP 2

LW TP 1

TP 2
TP 3

LW

LW

LW

kHz 520~1710

kHz

kHz

uV/m

uV/m

uV/m

uV/m

uV/m

uV/m

dB

dB

%

%

Hz 100~2k
Hz
dB

dB

£ 800 £500
£ 800 £500
£ 800 £500

³ 35 ³45

£ 1.5 £1.0

£ 10 £5

³ 20 ³25

10

80~2.3k

10

11

12

13

AGC FIGURE OF MERIT INPUT 100mV

8

IMAGE REJECTION MW = TP 3

9

FREQUENCY RESPONSE AT ± 1.5dB

AUTO STOP LEVEL MW

TUNED LEVEL MW

OUTPUT LEVEL

LW=TP3

LW

LW

dB

dB

dB

%

%

uV/m

uV/m

uV/m

uV/m

mV

³ 40 ³45
³ 30 ³35

£ 15 £10
£ 15 £10

800(± 6dB) 800(±5dB)

800(± 6dB) 800(±5dB)

120± 40

120±30

6

Dolby Pro-LogicÒA/V Receiver JSR-400

CONTROLS AND THEIR FUNCTION

2

JSR-400 AV RECEIVER

DOLBY SURROUND

l

PRO LOGIC

1

POWER (STANDBY)

3

SPEAKERS

VIDEO

VCR 2

AUDIOLRHESDPHONES

25

DOLBY DOLBY

PRO LOGIC

3 STEREO

HALL

DOLBYSURROUND
PROLOGIC

DOLBY3 STEREO

MATRIXHALL
CENTERMODE

NORMAL

SIMULATED

PHANTOM

WIDE

CENTER

MODE

4

56

1. Power: Once the unit is plugged in, it is in either
STANDBY or ON. This button switches from STANDBY to
ON, or can be operated from the remote control. In either
state the receiver is NOT disconnected from the AC main
power supply.

2. LED: In the STANDBY mode the LED is RED, when ON
the LED is Off.

7

89

22 21

TUNING

UP

DOWN

AUTO

AUX/TV

VOLUME

BALANCE BASS

L R MIN MAX

PM
FM
AM

BYPASS

TEST
TONE

10

TUNED

24

STEREO

BYPASS

11 12

MUTE MEMORY

FM/AM

23

AUTO

PRESET

DELAY

mS

TIME

MHz

kHz

CD

13

REAR
CENTER

dB
ch

SPEAKERS OFF

TAPE

14

VCR2

VCR1

15 16 17 18 2019

10. Test Tone: The test tone is used to calibrate the volume
settings of the speakers. A static noise will be heard
cycling, in order, from the front left, center, right, and both
surround speakers. When the test tone is cycling, you may
adjust the volume level of the center and surround speakers
with the CENTER LEVEL or REAR LEVEL buttons on the
remote control. Press the Test Tone button once more to
return to normal mode.

TREBLE

MAXMIN

3. Speaker Switch: Press this button to mute the output to

all speakers.

4. Headphone Jack: Normally the speaker switch (#3) is
pressed to mute speaker output for headphone listening.

5. Video 3 Input: Audio or Video sources connected to
these jacks may be selected by pressing the VCR2 button

(16).

6. Dolby Pro-Logic: Press this button to engage Dolby

Pro-Logic sound decoding. All five speakers are active in
this mode.

7. Dolby 3 Stereo: Press this button to engage Dolby 3
Stereo; only the front and center loudspeakers are active in
this mode.

8. Hall: Press this button to create a surround image from a
2 channel recording.

9. Center Mode: Press this button to change the center
speaker effect between NORMAL, WIDE and PHANTOM
when in the surround modes.

NOTE: The test tone is used to calibrate the performance of
the system. When listening to an actual recording, the
volume level of the surround channels is generally much
lower than that of the front channels. In fact, when listening
to a movie, virtually all of the dialogue and a substantial
amount of the effects are reproduced through the center
channel.

11. By Pass: Press this button to engage traditional 2
channel Stereo listening. Only the front speakers will be
active.

12. AM/FM Tuner Selector: Press this button once to
select the tuner. Press it again to switch between AM and
FM.

13. CD: Press this button to select the CD player.

14. Tape: Press this button to select the Cassette tape

player.

15. VCR1: Press this button to select a VCR or video source
connected to the rear panel on the unit.

7

Dolby Pro-LogicÒA/V Receiver JSR-400

16. VCR2: Press this button to select a VCR or video source
connected to the front panel on the unit.

17. AUX/TV Input: Press this button to select the source
connected to the TV Input.

18. Balance: This knob adjusts the balance between the
front left and right speakers.

19. Bass: This knob adjusts the tone of low-frequency
sounds. Turn it to the right to boost bass frequencies or to
the left to cut bass frequencies.

20. Treble: This knob adjusts the tone of high-frequency
sounds. Turn it to the right to boost high frequencies or to
the left to cut high frequencies.

21. Volume Control: Turn the knob clockwise to increase
volume, counterclockwise to decrease the volume.

22. Auto tune: Press this button when in the AM/FM mode
to direct the receiver to seek only the strongest stations
when pressing the TUNING button #23.

23. Tune: Press this button to manually scan up or down
through the FM or AM bands.

24. Information Display: This display delivers messages
and status indications to help you operate the receiver.

25. Remote Sensor Window: The sensor behind this
window receives infrared signals from the remote control.
Aim the remote at this area and do not block or cover it.

8

Dolby Pro-LogicÒA/V Receiver JSR-400

REAR PANEL CONNECTIONS

ANTENNA

CAUTION

RISKOF ELECTRIC SHOCK

27 26

BAL

300W

FM

UNBAL

L

R

AUX

IN ININ

75W

GND

AM

LOOP

CD

TAPE

AUDIO

OUT

VIDEO

MONITOR

VCR1

IN OUT OUT

VCR1

IN

OUT

DOLBY PROLOGIC RECEIVER

Northridge,CA USA

H

A HAarman International Company

SUB

WOOFER

28 29 30 31 32 33 34 35 36

MODEL NO. : JSR-400

R

RL

MAIN SPEAKERS

REAR SPEAKERSR(8W)

DONOT OPEN.

AVIS : RISQUE DE CHOC
ELECTRIQUE-NE PAS OUVRIR

WARNING : "TO REDUCE THE RISK OF FIRE OR

ELECTRIC SHOCK.
DO NOT EXPOSE THISAPPLIANCE TO
RAIN OR MOISTURE".

AVERTISSEMENT : "AFIN D'EVITER LES DANGERS

D'INCENDIE ET D'ELECTROCUTION,
NE PAS EXPOSER CET APPPAREIL
A LA PLUIE NI A L'HUMIDITE".

(8W)

L

37

38 39 40

R

E28241
A172
Listed
Audio equipment

CENTER

SPEAKERS

!

This devices complies with Part 15 of the FCC rules.Operation is subject to the following
two conditions; (1) The device may not cause harmful interferance, and (2) This device
must accept any interference received, including interference that may cause undesired

(8W)

operation.

Manufactured under license from Dolby Laboratories Licensing Copration."Dolby,"the
double-D symbol and "ProLogic" are trademarks of Dolby Laborotories Liencing
Coporation.

AC~120V 60Hz

180W

26. AM Antenna: Connect the AM loop antenna supplied
with the receiver to these terminals.

27. FM Antenna: Connect the FM antenna supplied with
the receiver to these terminals.

28. AUX In: Connect a TV output or any auxiliary audio
source (except for a phonograph) to these jacks. A
phonograph will need a phono pre-amp before being
connected to these jacks

29. CD IN: Connect these jacks to the output of a compact
disk player or CD changer.

30. Tape In: Connect these jacks to the PLAY/OUT jacks of
an audio recorder.

31. Tape Out: Connect these jacks to the RECORD/INPUT
jacks of an audio recorder.

32. VCR In: Connect these jacks to the audio output jacks of
a stereo VCR.

33. VCR Out: Connect these jacks to the audio input jacks
of a stereo VCR.

35. TV Monitor Video Output: Connect this jack to the
standard (composite) video input of a TV monitor or video
projector to view the output of any standard video source
selected by the receiver’s video switch.

36. Subwoofer Pre-Out: Connect this jack to the line level
input of a powered subwoofer. If an external subwoofer
amplifier is used, connect this jack to the subwoofer
amplifier input.

37. Rear Speakers: Connect these terminals to the
surround speakers.

38. Main Speakers: Connect these terminals to the front
speakers.

39. Center: Connect these terminals to the center speaker.

40. Power Cable: Connect the AC plug to a non-switched

AC wall output.

34. Video - VCR1: Connect the single input jack to the video
output jack of a VCR, and the output jack to the video input
jack of the same VCR.

9

Dolby Pro-LogicÒA/V Receiver JSR-400

JBL

DISASSEMBLY PROCEDURES

STEP 1.

REMOVING THE TOP COVER

1. REMOVING THE SCREWS 1~9

7

8

9

J

B

L

6

5

4

3

STEP 2.

REMOVING THE BOTTOM COVER

1. REMOVING THE SCREWS 1~8

8

1

2

3

4

2

1

STEP 3.

REMOVING THE FRONT PANEL

1. REMOVING KNOB VOLUME MAIN FROM FRONT PANEL

2. REMOVING THE SCREWS 1~12

3

2

11

10

4

5

6

9

7

8

J

B

1

7

6

L

12

5

KNOB VOLUME MAIN

10

Dolby Pro-LogicÒA/V Receiver JSR-400

DISASSEMBLY PROCEDURES (continued)

STEP 4.

REMOVING THE FRONT CHASSIS

1. REMOVING THE SCREWS 1~5

1

2

3

4

5

STEP 6.

REMOVING THE TUNER PCB

1. REMOVING THE SCREWS 1

1

STEP 5.

REMOVING THE REAR PANEL

1. REMOVING THE SCREWS 1~18

1

2
3

4

ANTENNA

BAL

300W

FM

UNBAL

75W

VIDEO

GND

AM

IN

LOOP

AUX CD

TAPE

ININ

L

R

AUDIO

7

6

5

MODELNO. : JSR-400

DOLBYPROLOGIC RECEIVER

VCR1

MONITOR

OUT

OUT

Northridge,CAUSA

H

AHAarman International Company

VCR1

OUTINOUTIN

SUB

WOOFER

9

8

10

MAINSPEAKERS

R L

R L

REARSPEAKERS (8W)

CAUTION

!

RISKOF ELECTRIC SHOCK

DONOTOPEN.

AVIS: RISQUE DE CHOC
ELECTRIQUE-NEPAS OUVRIR

WARNING: "TO REDUCE THE RISK OF FIRE OR

ELECTRICSHOCK.
DONOT EXPOSE THISAPPLIANCE TO
RAINOR MOISTURE".

AVERTISSEMENT: "AFIN D'EVITER LES DANGERS

D'INCENDIEET D'ELECTROCUTION,
NEPAS EXPOSER CET APPPAREIL
ALA PLUIE NI A L'HUMIDITE".

(8W)

R

E28241
A172
Listed
Audioequipment

CENTER

SPEAKERS

(8W)

12 13 14 15

11

Thisdevices complies with Part 15 of the FCC rules. Operation is subject to the following
twoconditions; (1) The device may not cause harmful interferance, and (2) This device
mustaccept any interference received, including interference that may cause undesired
operation.

Manufacturedunder license from Dolby Laboratories Licensing Copration."Dolby,"the
double-Dsymbol and"Pro Logic" are trademarks of Dolby Laborotories Liencing
Coporation.

18

AC~120V60Hz

180W

17

16

11

Dolby Pro-LogicÒA/V Receiver JSR-400

DISASSEMBLY PROCEDURES (continued)

4

1

3

2

STEP 7.

REMOVING THE POWER PCB

1. REMOVING THE SCREWS 1~4

STEP 8.

REMOVING THE VIDEO PCB

1. REMOVING THE SCREWS 1~2

STEP 9.

REMOVING THE MAIN PCB

1. REMOVING THE SCREWS 1~3

1

2

3

2

1

12

Dolby Pro-LogicÒA/V Receiver JSR-400

CIRCUIT DESCRIPTION

1. Surround Circuits

This model incorporates a surround processor circuit.

Fig. 1 is a block diagram of the surround processor circuit. The microprocessor transfers the data to the Dolby Pro-Logic
decoder and Time Delay Device to operate the circuits in each mode.

L Input

R Input

Buffer

Buffer

IC5
LC4966

IC10
NJW1102

X1

X1

Noise
Generator

Input
Auto­balance
Control

Noise
Sequencer

IC11
NJU9702

S

VLRV

Adaptive
Matrix

S

By-Pass Line

7knz
LPF

Time
Delay

CS

Modified
Dolby B NR

L

C

R

MASTER
VOLUME

S

L
R
C

Center/
Operating
Mode

C

Control

S

electric

S

vol.

AMP

C

AMP

S

Fig. 1

TONE
CONTROL

TONE
CONTROL

AMP

AMP

AMP

AMP

Block diagram of the surround
processor circuit

1) BYPASS

Set to this mode to listen to ordinary stereo sound. The rear L/R and center outputs will be muted.

SPEAKER

FRONT L

CENTER

FRONT L

SURROUND L

SURROUND L

Fig. 2

SOURCE

L

SOURCE

R

IC5

LC4966

OUTPUT

SURROUND

OUTPUT

SURROUND

13

Dolby Pro-LogicÒA/V Receiver JSR-400

2) DOLBY PRO-LOGIC CIRCUIT

Dolby Pro-Logic is a sound effect system for movies developed by the Dolby Laboratories Licensing Corp. IC10 (NJW1102) is
a Dolby Pro-Logic decoder IC. When an audio signal recorded using the Dolby Pro-Logic system is sent to this IC, the left,
right, center and surround components are separated. The surround signal component is delayed by the delay IC11
(NJU9702). Fig. 3 shows the configuration of the Dolby decoder.

IC10

V

LR

V

CS

By-Pass Line

7knz
LPF

L
R
C

S

Modified
Dolby B NR

Center/
Operating
Mode
Control

L-ch

R-ch

AMP

C

electric

S

vol.

C

AMP

S

C-ch

C-ch

Fig. 3

Audio
Signal

Audio
Signal

L-ch

R-ch

X1

X1

Input
Auto­balance
Control

Flow of signals within the system
in the Dolby Pro-Logic mode

Adaptive
Matrix

S

IC11
NJU9702

Time
Delay

With Dolby Pro-Logic, three center modes depend on the use of a center speaker as follows.

NORMAL: Bass frequencies are sent only to the Left and Right Front channels. Select this mode when the

Center Speaker is smaller than the left and Right speakers.

WIDE: Bass frequencies are sent to the Left, Center and Right speakers. Select this mode when the

Center speaker is approximately the same size as the Left and Right speakers.

PHANTOM: Center channel information is sent to the Left and Right speakers. Select this mode when you do

not have a center channel speaker.

3) STEREO CIRCUIT

In 3-stereo mode, surround sound is sent to front Left channel and front Right channel and no surround sound is sent to
surround channel.

S

Fig. 4

IC10 NJW1102

Audio

L-ch

Signal

Audio

R-ch

Signal

Flow of signal within the system in the 3-stereo mode

X1

X1

Input
Autobalance
Control

Adaptive
Matrix

L

Center/

R

Operating
Mode

C

Channel

C

electric
vol.

L-ch

R-ch

C-ch

14

Dolby Pro-LogicÒA/V Receiver JSR-400

4) TEST TONE GENERATOR

The test tone generator generates a test tone (noise) to check the balance of sound output from each speaker in the Dolby
Pro-Logic mode. (This circuit is produced under license of the Dolby Laboritories Licensing Corp.) The test tone to the
loudspeakers at 2 second intervals in the following sequence: Left, Center, Right, Rear (both rear channels).

Fig. 5

Flow of noise signals within the system

IC10 NJW1102

Input
Auto­Balance
Control

Noise
Sequencer

Adaptive
Matrix

S

Time
Delay

IC11
NJU9702

2. DIGITAL TUNING SYSTEM DESCRIPTION.

1) DIGITAL TUNING SYSTEM

FM ANT

FM FRONT END PACK

L
B

Center/

C

Operating
Mode
Channel

S

FM PLL Loop

AM PLL Loop

L-ch

R-ch

Noise signal output

C-ch

S-ch

AM ANT

FM RF

AM RF

FM MIX

FM OSC

BUFFER

AM MIX

AM OSC

BUFFER

Low Pass Filter
Q201, 202

PLL Prescaler

FM IN

IC2

AM IN

Data

CPU

IC1

FL
Display

Key

Switch

Matrix

15

Dolby Pro-LogicÒA/V Receiver JSR-400

2) VCO VS. FM BAND FREQUENCY CURVE.

8

7

6

5

CO

4

V Voltage (V)

3

2

1

0

87.5 89.5 91.5 93.5 95.5 97.5 99.5 101.5103.5 105.5 107.5

3) VCO VS. AM BAND FREQUENCY CURVE.

9

8

7

6

5

CO

4

V Voltage (V)

FM Band Frequency (MHz)

3

2

1

0

520 600 700 800 900 1000 1100 1200 1300 1400 1500 1600

AM Band Frequency (kHz)

16

Dolby Pro-LogicÒA/V Receiver JSR-400

JSR400 PACKING

4

5

6

7

8

ATTACHED WITH
CELLOPHANE TAPE

9
10
11
12

3

2

3

NO.NO.

1

2

3

4

5

1

13

14

6

7

8

9

10

11

12

13

14

PARTS NO.

6121-000-421

6132-000-060

6161-000-140
2163-000-020

2163-000-010

6457-000-010

6452-000-020

6131-000-160

6453-000-002

6425-000-240

6231-001-011

1111-ARCCINII

6234-002-000

6234-001-021

PARTS NAME

MASTER CARTON

POLY SHEET

CUSHION SIDE

CORD PIN

CORD RCA

AM LOOP ANTENA

ANT. FM

BAG PE

BATTERY

REMOCON ASS'Y

CARD WARRANTY

INSTRUCTION MANUAL

LABEL SERIAL NO

LABEL BARCODE #39

QT'Y

1

1

2

1

1

1

1

1

2

1

1

1

1

1

17

Dolby Pro-LogicÒA/V Receiver JSR-400

JSR400 BLOCK DIAGRAM

1

ANT

AUDIO

TUNER

TAPE

VCR1

VIDEO

CD

FM

AM

TV

BA

FM

FRONT END

AM

AM

OSC

ANT

I

O

I

O

I

C

F101

PLL IC

LM7001

IC2

F102

IC3

AM/FM IF

LA1265

AM

IF T

F202

IC7821

BUFFER

ED

IC4

FM MPX

LA3410

FM

DET

BY-PASS

F

DATA
CLK
CE
TUNED
STEREO
T-MUTE

L.P.F.

MASTER VOLUME

G

CPU

H

- INPUT PARTS

- SURROUND PARTS

- TUNER PARTS

- MAIN AMP PARTS

- POWER SUPPLY PARTS

I

FL DISPLAY

RIGHT CHANNEL

(SAME AS LEFT CHANNEL)

TONE AMP

14.5dB

BALANCE

J

RESORNATOR

FL AC 4V

+15V

-15V
+5V

FRONT AMP

CENTER AMP

REAR AMP

KEY MATRIX

CPU

REGULATOR

+15V. -15V.

+5V

AMP
POWER
SUPPLY

MAIN AMP

LMK

RMC

SENSOR

MAIN

POWER

TRANS

PROTECT

RELAY

DRIVER

COMMANDER

5V

REGU.

ST-BY RELAY

ST-BY

TRANS

O

EUROPE : 230/50Hz

USA : 120/60Hz

P

HEAD
PHONE

FRONT
SPEAKER

VIDEO

VCR

O

VIDEO IN

MONITOR

I

6dB AMP

6dB AMP

LC4966

VCR
VIDEO from CPU

JSR-400 BLOCK DIAGRAM

JSR-400 PAGE 18-1of2

ABCDE

F

DOLBY PRO-LOGIC

ADAPTIVE MATRIX

NJW1102

DIGITAL

DELAY

NJU9702

G

H

C-CH

S-CH

2.92dB

0.83dB

MUTE

SUB WOOFER

PROTECT

19.3dB

MUTE

MUTE

19.3dB

J

K

LMI

CENTER AMP

PROTECT

REAR AMP

JSR-400 PAGE 18-2of2

O

CENTER
SPEAKER

L

REAR
SPEAKER

R

P

18

BA

T

C

E

N
E
A

T

C

ED

F

G

H

I

1

ANT

AUDIO

TUNER

TAPE

VCR1

VIDEO

CD

FM

AM

TV

F101

FM

FRONT END

IC3

AM/FM IF

AM

OSC

PLL IC

LM7001

IC2

AM

ANT

I

O

I

O

I

LA1265

AM

IF T

IC7821

F102

F202

BUFFER

IC4

FM MPX

LA3410

FM

DET

DATA
CLK
CE
TUNED
STEREO
T-MUTE

BY-PASS

CPU

L.P.F.

MASTER VOLUME

FL DISPLAY

- INPUT PARTS

- SURROUND PARTS

- TUNER PARTS

- MAIN AMP PARTS

- POWER SUPPLY PARTS

RIGH

(SAME AS

TONE AMP

14.5dB

BALAN

FL

FRO

CENT

RE

R

VIDEO

VCR

O

VIDEO IN

MONITOR

I

6dB AMP

6dB AMP

LC4966

VCR
VIDEO from CPU

JSR-400 BLOCK DIAGRAM

JSR-400 PAGE 18-1of2

ABCDE

F

DOLBY PRO-LOGIC

ADAPTIVE MATRIX

NJW1102

DIGITAL

DELAY

NJU9702

G

H

C-CH

S-CH

2.92dB

0.83dB

I

MU

G

J

H

I

J

LMK

O

P

U

VOLUME

FL DISPLAY

- INPUT PARTS

- SURROUND PARTS

- TUNER PARTS

- MAIN AMP PARTS

- POWER SUPPLY PARTS

RIGHT CHANNEL

(SAME AS LEFT CHANNEL)

RESORNATOR

FL AC 4V

FRONT AMP

CENTER AMP

REAR AMP

BALANCE

+15V

-15V
+5V

KEY MATRIX

CPU

REGULATOR

+15V. -15V.

+5V

AMP
POWER
SUPPLY

RMC

SENSOR

MAIN

POWER

TRANS

PROTECT

RELAY

DRIVER

COMMANDER

5V

REGU.

ST-BY RELAY

EUROPE : 230/50Hz

USA : 120/60Hz

ST-BY

TRANS

HEAD
PHONE

PRO-LOGIC

IVE MATRIX

W1102

DIGITAL

DELAY

JU9702

TONE AMP

14.5dB

C-CH

S-CH

2.92dB

0.83dB

MUTE

MAIN AMP

19.3dB

MUTE

MUTE

19.3dB

CENTER AMP

REAR AMP

FRONT
SPEAKER

SUB WOOFER

PROTECT

CENTER
SPEAKER

PROTECT

L

REAR
SPEAKER

R

JSR-400 PAGE 18-2of2

G

H

J

K

LMI

O

P

Dolby Pro-LogicÒA/V Receiver JSR-400

JSR-400 UNIT EXPLODED VIEW

1

JSR-400 Mechanical

Exploded View

S7

PARTS CODE

NO

1514-000-030

JK1

1515-000-011

JK2

1514-000-020

JK3

1514-000-021

JK4

1531-000-020

JK5

1531-000-021

JK6

1531-000-002

JK7

33

1

JSR-400 PAGE 19-1of2

ABCDE

BA

5

S1

JBL

2

C

28

PARTS NAME

JACK RCA
JACK PHONE
JACK RCA
JACK RCA

TERMINAL SPEAKER
TERMINAL SPEAKER
TERMINAL ANTENNA

JK2

3

S1

4

Q'TY

MATERIAL & SPECIFICATION

3P JW-3104D,GOLD,YWR JAEWON

1

HP 6.5H,3 ST,HTJ-064-08D,GOLD

1

1P JW-1512,BLACK, WAKA

1

4P JW-4104R, JAEWON

3

2P JW-5502A,JAEWON

1

8P JW-5508A, JAEWON

1

4P JW-5540D,JAEWON

1

8

JK1

SW1

S4

7

9

S1

12

S6

ED

F

G

H

I LMK

J

O

P

26

S8

S6

W2

S3

W1

30

24

27

25

S6

S6

S6

32

S6

JK5

JK6

S1

31

JK3

JK4

x3

W4

W3

29

W4

W3

S2 X3

S1

S5

VR1

S5

19

23

JK7

S8

20

6

S1

VR2

S7

14

13

S1

S1

S2

S1

11

10

VR3

S1

15

22

21

18

Q'TY

PARTS CODE

NO

1

5111-000-152

2

5514-000-061

3

5142-000-041

4

S1

S8

S1

16

S1

16

17

S1

NO

S1

S2

S3

S4

S5

S6

S7

S8

W1

W2

W3

W4

VR1

VR2

VR3

SW1

PARTS CODE

5636-130-080

5636-140-040

5636-140-080

5636-140-060

5636-140-030

5636-140-010

5636-140-130

5636-140-020

5541-001-030

5541-001-040

5541-001-010

5541-001-020

1723-503-002

1721-104-030

1721-104-040

1671-000-013

PARTS NAME

SCREW

SCREW

SCREW

SCREW

SCREW

SCREW

SCREW

SCREW

WASHER

WASHER

WASHER

WASHER

VOLUME MOTOR

VOLUME ROTARY

VOLUME ROTARY

SWITCH TACT

MATERIAL & SPECIFICATION

Q'TY

A123008000

40

A183008000

10

A124008000

4

S30C ( BTTN, D:12, 3X10)

2

A113016000

4

23

A123010002

A184008002

6

A123006000

8

WASHER SPRING;NO.2,M4.0,MC,TOYO

4

WASHER FLAT P/W 4.4*12*1.0,MC.TOYO

4

WASHER SPRING;NO.2,M3.0,MC,TOYO

4

WASHER FLAT P/W 3.3*8.0*0.5,MC.TOYO

4

RK16814MG 50KAX4 LG

1

RK14K1280307 100KMNX2 W/BUSHING LG

1

RK14K1280307 100KC X2 W/BUSHING LG

2

SW TACT KPT1105AM-1 4PIN

17

5131-001-172

5

5131-001-182

6

5131-001-222

7

5131-001-212

8

9

10

11

5226-000-210

12

5131-001-192

13

5441-000-120

5221-000-090

14

15

5221-000-080

5179-000-050

16

5141-000-110

17

18

5221-000-170

19

20

21

22

5441-000-131

23

24

5212-000-041

25

5179-000-060

2161-000-0032-1

26

27

5241-000-090

5213-000-022

28

1419-000-030J

29

1419-000-030-1

30

5241-000-110

31

6234-001-108

32

5351-000-900

33

PARTS NAME

PANEL FRONT

WINDOW FLT

LENS . LED

KNOB . VOLUME

BUTTON . POWER

BUTTON . TUNNING

BUTTON . FUNCTION

PCB

PCB

PCB

SHIELD CASE

KNOB . ROTARY

CUSHION FLT

CHASSIS . FRONT

CHASSIS . MAIN

FOOT FRONT

FOOT CUSHION

BOTTOM COVER

PCB

PCB

PCB

PCB

CUSHION PCB

PCB

REAR CABINET

BUSHING AC CORD

CORD POWER

HEAT SINK. MAIN

TOP COVER

POWER TRANS

POWER TRANS

PCB

HEAT SINK. PIN

LABEL

BADGE

MATERIAL & SPECIFICATION

1

HIPS

1

PVC T1.0 WINE COLOR

1

ACRYL

ABS

1

1

ABS

ABS

1

ABS

1

1

CONTROL (1X2)

SUB (JACK)

1

SUB (TONE)

1

SPTE T0.3

1

ABS

3

CUSHION H:25

2

SECC T1.0

1

1

SECC T1.0

4

ABS(H/STAMP:GOLD)+RUBBER

RUBBER

4

SECC 1.0t

1

SUB(VOLUME)

1

MAIN BOARD

1

1

TUNER PCB

3

TUNER PCB

SUB (REAR)

1

SECC 1.0T

1

NYLON 66 (NIFCO 2271)

1

UL , PT2

1

1

A6063-T5 AL.

SECC T0.6+PVC T0.2

1

120V 60HZ

1

230V/50HZ, VDE

1

SUB (POWER)

1

3

A6063-T5, PIN TYPE

1

MADE IN CHAINA

1

JBL

JSR-400PAGE19-2of2

F

G

H

J

K

LMI

O

P

19