Marantz SR-2400 Service Manual

Service

Manual

SR2400 /K1S/N1S/S1S

AV Surround Receiver

Time/Volume

STANDBY

SR2400

PHONES

SR2400

TABLE OF CONTENTS
SECTION	PAGE
1. TECHNICAL SPECIFICATIONS ............................................................................	1
2. TECHNICAL DESCRIPTION .................................................................................	2
3. SERVICE MODE ...................................................................................................	3
4. SERVICE PROCEDURE .......................................................................................	3
5. BLOCK DIAGRAM.................................................................................................	5
6. SCHEMATIC DIAGRAM ........................................................................................	7
7. PARTS LOCATION ..............................................................................................	21
8. IC DATA................................................................................................................	29
9. EXPLODED VIEW AND PARTS LIST .................................................................	39
10.ELECTRICAL PARTS LIST ..................................................................................	42

Please use this service manual with referring to the user guide ( D.F.U. ) without fail.

SR2400

Part no. 33AW855010 First Issue 2003.11 ecm

MARANTZ DESIGN AND SERVICE

Using superior design and selected high grade components, MARANTZ company has created the ultimate in stereo sound. Only original MARANTZ parts can insure that your MARANTZ product will continue to perform to the specifications for which it is famous.

Parts for your MARANTZ equipment are generally available to our National Marantz Subsidiary or Agent.

ORDERING PARTS :

Parts can be ordered either by mail or by Fax.. In both cases, the correct part number has to be specified. The following information must be supplied to eliminate delays in processing your order :

1.Complete address

2.Complete part numbers and quantities required

3.Description of parts

4.Model number for which part is required

5.Way of shipment

6.Signature : any order form or Fax. must be signed, otherwise such part order will be considered as null and void.

USA

MARANTZ AMERICA, INC

1100 MAPLEWOOD DRIVE ITASCA, IL. 60143

USA

PHONE : 630 - 741 - 0300 FAX : 630 - 741 - 0301

AMERICAS

SUPERSCOPE TECHNOLOGIES, INC.

MARANTZ PROFESSIONAL PRODUCTS 2640 WHITE OAK CIRCLE, SUITE A AURORA, ILLINOIS 60504 USA

PHONE : 630 - 820 - 4800

FAX : 630 - 820 - 8103

AUSTRALIA

QualiFi Pty Ltd,

24 LIONEL ROAD,

MT. WAVERLEY VIC 3149 AUSTRALIA

PHONE : +61 - (0)3 - 9543 - 1522 FAX : +61 - (0)3 - 9543 - 3677

NEW ZEALAND

WILDASH AUDIO SYSTEMS NZ

14 MALVERN ROAD MT ALBERT AUCKLAND NEW ZEALAND PHONE : +64 - 9 - 8451958

FAX : +64 - 9 - 8463554

JAPAN Technical

MARANTZ JAPAN, INC.

35- 1, 7- CHOME, SAGAMIONO SAGAMIHARA - SHI, KANAGAWA JAPAN 228-8505

PHONE : [phone] FAX : [phone]

EUROPE / TRADING

MARANTZ EUROPE B.V.

P. O. BOX 8744, BUILDING SILVERPOINT BEEMDSTRAAT 11, 5653 MA EINDHOVEN THE NETHERLANDS

PHONE : +31 - 40 - 2507844

FAX : +31 - 40 - 2507860

AUSTRALIA

TECHNICAL AUDIO GROUP PTY, LTD

43-53 Bridge Rd., STANMORE NSW 2048 AUSTRALIA

PHONE : +61 - (0)2 - 9519 - 0900

FAX : +61 - (0)2 - 9519 - 0600

THAILAND

MRZ STANDARD CO., LTD

746 - 754 MAHACHAI ROAD., WANGBURAPAPIROM, PHRANAKORN, BANGKOK, 10200 THAILAND

PHONE : +66 - 2 - 222 9181

FAX : +66 - 2 - 224 6795

TAIWAN

PAIYUING CO., LTD.

6 TH FL NO, 148 SUNG KIANG ROAD, TAIPEI, 10429, TAIWAN R.O.C. PHONE : +886 - 2 - 25221304

FAX : +886 - 2 - 25630415

CANADA

LENBROOK INDUSTRIES LIMITED

633 GRANITE COURT, PICKERING, ONTARIO L1W 3K1 CANADA

PHONE : 905 - 831 - 6333

FAX : 905 - 831 - 6936

HONG KONG

Jolly ProAudio Broadcast Engineering Ltd.

UNIT 2, 10F, WAH HUNG CENTRE,

41 HUNG TO ROAD, KWUN TONG, KLN., HONG KONG

PHONE : 852 - 21913660

FAX : 852 - 21913990

SINGAPORE

WO KEE HONG DISTRIBUTION PTE LTD

130 JOO SENG ROAD #03-02 OLIVINE BUILDING SINGAPORE 368357

PHONE : [phone]

FAX

: [phone]

MALAYSIA

WO KEE HONG ELECTRONICS SDN. BHD.

2ND FLOOR BANGUNAN INFINITE CENTRE LOT 1, JALAN 13/6, 46200 PETALING JAYA SELANGOR DARUL EHSAN, MALAYSIA PHONE : +60 - 3 - 7954 8088

FAX : +60 - 3 - 7954 7088

KOREA

MK ENTERPRISES LTD.

ROOM 604/605, ELECTRO-OFFICETEL, 16-58, 3GA, HANGANG-RO, YONGSAN-KU, SEOUL KOREA

PHONE : +822 - 3232 - 155

FAX : +822 - 3232 - 154

SHOCK, FIRE HAZARD SERVICE TEST :

CAUTION : After servicing this appliance and prior to returning to customer, measure the resistance between either primary AC cord connector pins ( with unit NOT connected to AC mains and its Power switch ON ), and the face or Front Panel of product and controls and chassis bottom.

Any resistance measurement less than 1 Megohms should cause unit to be repaired or corrected before AC power is applied, and verified before it is return to the user/customer.

Ref. UL Standard No. 1492.

In case of difficulties, do not hesitate to contact the Technical

Department at above mentioned address.

030307MIT

1. TECHNICAL SPECIFICATIONS
AUDIO SECTION
THD 10 % 6 ohms ..................................................................................................	60W / Ch
THD 1 % 6 ohms ....................................................................................................	50W / Ch
THD (1 kHz) at 30 W output ..........................................................................	6 ohms 0.05 %
Input Sensitivity
Linear ..................................................................................................................	200 mV
Signal to Noise Ratio
Linear (1 W) ...........................................................................................................	95 dB
FM TUNER SECTION
Frequency Range .......................................................................................	87.5 - 108.0MHz
Usable Sensitivity .................................................................................	IHF 1.8 V / 16.4dBf
Signal to Noise Ratio .........................................................	MONO / STEREO 70dB / 70dB
Distortion .........................................................................	MONO / STEREO 0.2 % / 0.3 %
Stereo Separation ..............................................................................................	1kHz 45dB
Alternative Channel Selectivity .....................................................................	400kHz 60dB
Image Rejection ...............................................................................................	98kHz 80dB
Tuner Output Level ......................................................................	1kHz, 40kHz Dev 500mV
AM TUNER SECTION
Frequency Range ..........................................................................................	531 - 1602kHz
Signal to Noise Ratio ....................................................................................................	35dB
Usable Sensitivity ...........................................................................................	LOOP 400 V
Distortion ......................................................................................	400Hz, 30 % Mod 1.0 %
Selectivity .........................................................................................................	9kHz 35dB
VIDEO SECTION
Television Format ..............................................................................................	NTSC / PAL
Input Level / Impedance .............................................................................	1Vp-p / 75 ohms
Output Level / Impedance ..........................................................................	1Vp-p / 75 ohms
Video Frequency Response 3dB .........................................................	5Hz to 8MHz(-1dB)
GENERAL
Power Requirement [/K]............................................................................	AC 220 V 50 Hz
[/N/S].........................................................................	AC 230 V 50 Hz
Power Consumption .....................................................................................................	75 W
Maximum External Dimensions (WxHxD) ..............................................	420 x 76 x 320 mm
Weight .........................................................................................................................	4.0 kg
ACCESSORIES
Remote Control Unit (RC2400SR) .....................................................................................	1
Batteries (AAA Type) ..........................................................................................................	2
FM Antenna .....................................................................................................................	... 1
AM Loop Antenna ...............................................................................................................	1
AC Power Cord ..................................................................................................................	1
Registration Card ..............................................................................................................	. 1
UserÕ Guide .......................................................................................................................	1

The relation between the selected surround mode and the input signal

The surround mode is selected with the surround mode buttons on SR2400 or the remote control unit. However, the sound

you hear is subject to the relationship between the selected surround mode and input signal. That relationship is as follows;

SW Position Input Signal

5.1ch	Dolby Surr.EX
	Dolby Digital 5.1
	Dolby Digital 2ch
	Dolby Digital 2ch Surr

DTS-ES

DTS 96/24 5.1ch

DTS 5.1

PCM

Analog

Auto Surround Decode Format Possible to select Surround Decode Fromat Direct Stereo Key

Dolby Digital 5.1		Stereo
Dolby Digital 5.1		Stereo
Dolby PL II Movie	Dolby PL II Music	Stereo
Dolby PL II Movie	Dolby PL II Music	Stereo
DTS5.1		Stereo
DTS5.1		Stereo
DTS5.1		Stereo
Dolby PL II Movie	Dolby PL II Music	Stereo
Dolby PL II Movie	Dolby PL II Music	Stereo

1

2. TECHNICAL DESCRIPTION

DTS was introduced in 1994 to provide 5.1 channels of discrete digital audio into home theater systems.

DTS brings you premium quality discrete multichannel digital sound to both movies and music. DTS is a multi-channel sound system designed to create full range digital sound reproduction.

The no compromise DTS digital process sets the standard of quality for cinema sound by delivering an exact copy of the studio master recordings to neighborhood and home theaters.

Now, every moviegoer can hear the sound exactly as the moviemaker intended.

DTS can be enjoyed in the home for either movies or music on of DVD’s, LD’s, and CD’s.

“DTS” and “DTS Digital Surround” are registered trademarks of Digital Theater Systems, Inc.

Dolby Digital identifies the use of Dolby Digital audio coding for such consumer formats as DVD and DTV. As with film sound, Dolby

Digital can provide up to five full-range channels for left, center, and right screen channels, independent left and right surround channels, and a sixth ( “.1”) channel for low-frequency effects.

Dolby Surround Pro Logic II is an improved matrix decoding technology that provides better spatiality and directionality on Dolby Surround program material; provides a convincing three-dimensional soundfield on conventional stereo music recordings; and is ideally suited to bring the surround experience to automotive sound. While conventional surround programming is fully compatible with Dolby Surround Pro Logic II decoders, soundtracks will be able to be encoded specifically to take full advantage of Pro Logic II playback, including separate left and right surround channels. (Such material is also compatible with conventional Pro Logic decoders.)

Dolby Digital EX creates six full-bandwidth output channels from 5.1- channel sources. This is done using a matrix decoder that derives three surround channels from the two in the original recording. For best results, Dolby Digital EX should be used with movies soundtracks recorded with Dolby Digital Surround EX. Manufactured under license from Dolby Laboratories. “Dolby”, “Pro Logic”, and the double-D symbol are trademarks of Dolby Laboratories.

2

3.SERVICE MODE

1.Micro-Processor (IC20: MAIN PCB) version check

Operate by using [Remote controller RC2400SR]

1.Press the POWER button to turn on the unit.

2.Press the AMP button on the remote controller.

3.Press the DISPLAY button on the remote controller over 5 sec.

4.Micro-Processor version is displayed on the front FLD. (Ex.: 03-11-05-1) then, All the FLD segments light up.

5.Turn off the power to quit Service Mode.

4.SERVICE PROCEDURE

DC Offset Alignment

Settings: Volume --- Minimum (Operate by using [Remote controller RC2400SR]

Speaker out --- No load

	Power	Channel	Adjustment	Measurement	Alignment Terget
			Point	Point
		FRONT L	L ch : VR 41
		FRONT R	R ch : VR 42	Speaker Output	DC VOLTMETER
	On	CENTER	L ch : VR 41
				Terminal	0V ± 30mV
		SURROUND L	L ch : VR 41
		SURROUND R	R ch : VR 42

Adjustment

Point

R ch : VR 42

L ch : VR 41

FRONT

CENTER SURROUND

3

Personal notes:

4

5. BLOCK DIAGRAM

Repair is

PCB ASS'Y replacement

5

6

6. SCHEMATIC DIAGRAM
MAIN PCB	CONNECTOR PCB

7

8

DSP PCB

9

10

AUDIO PCB	VIDEO PCB

AUX PCB

SYSTEM PCB

OUTLET PCB [/N only]

11

12

AMP PCB

13

14

SPEAKER TER. PCB

15

16

FRONT PCB

TACT (B) PCB

TACT (A) PCB

IR PCB

H/P PCB

17

18

SMPS PCB

(Repair is PCB ASS’Y replacement)

! F901 250VT5A		10D471K	LF91	LF92
!	C932	!	!	!
CN91	152
		TN91
			C901
			474
!	C933
	152
		R901

1M1/4W

SQ2828-40MH

ZD94

7.5V

NOTES

1.Resistor values are indicated in ohms unless otherwise specified

( K = 1.000 M = 1.000.000 )

2.Capacitor values are indicated in

microfarades or picoparades

( :microfarades, :picoparades )

CAUTION

Safety precaution to be followed during

servicing
1) Since those parts marked with
are critical parts for safety.	!

use only the one described in the parts list.

2)Before returning the set to the customer make appropriate leakage current or resistance measurements to determine the exposed parts are properly insulated from the supply circuit.

ZD95

7.5V PC92

817

		NT91 ! D5SB60BD91		!
		8D-15
	C903	!	!
	101			6,7
	C902			C906
				471
	104
	C904			4,5
	101 !		C907
			1KV102
			B901

U901

1

KA5Q1565RF

C905

4 FB

D

VCC 3

400V270

SS

G

5

2

R903

D901

!

680 UF4004

ZD91

2

C908

R950

R904

7.5V

C909

333

30K

PC91

510

222

817

1

R912

!

100K1/4W

1

C921

1KV102

2

D902

UF4007

3

ZD97

C954

1W6V

D903

R913

Q908

Q901

A708

1/2W15

1KV101

A708

TH91

R914

UF4004

4

3D-10K

ZD96

R915

1K

11V

10K

Q909

C940

C922

50V22

C1008

PC93

50V22

6

R936

817

10

1

8

2

7

D904

R916

3

4

5

6

U902

UF4004

10

5

FSDH0165R

C924

C923

50V100

104

6

T1	D905	FCH20A15					L901 2.2UH
				R906		R907	#
	C910	R905			1K	3.3K	R908
	1KV102	4.7					35KF
							C913
	13,14
		C911		C912	PC91/A			C914		R947,948,949
							50V1	WL		2W1Kx3
		WL		WL	817
								50V680
		50V1000		50V1000
				C952		U903	#
	12					431	R910
				104
							3.3KF
			#	M901
				0.01
			R940				R938
			120KF	U909	KA358					C955
							10K
				3	4		Q905			104
								D908
		#					C1008
			R941	2	8	R937		1N4148
			680KF			10K
						D906		R942
						SB240	7805	10K
					10		U904		0.5A
						C915	D914		C916		R943
		R939			35V1000				50V100
											1K
		10K					1N4003
				U905
				7812	11

8D907

SB290

	U908	C917		C918	R945
		35V1000	D915	50V100
					5.1K
11			1N4003
11			D916
		C919	1N4003	C920	R944
		35V1000		50V100
	SB290				5.1K
9	D909
T2			7912
			U906

12	D910
	UF4004	C925
		16V330	Q902
11			C1008
		R918		R933
				4.7K
		JUMP0	R919	R920
	D911			10K
		ZD92	22K
		1W8.2V
10	UF4004	L903	3.3UH

C926				R932	C950
50V47				2K
		Q903	R921		50V22
9
		A708	10K
D912	Q906
	C1008
1N4148	L902	3.3UH

D913	R922	R923		#
				R925
1N5819
	1K	100		1.54KF			R929	R930
7							2.3K	2K
			50V1
					ZD93
C927	PC92/A			C929		3.9V	R927
			C928
10V470										PC93/A
				10V470			5.6K
8										817
				#
		U907				C930		R928	Q904
		431		R924	R926	50V1		10K	C1008	R931
				1.2KF	5.1K					1K

GND

C931 222

!	!

1	IN1 +28
2	IN2 +28
3	IN3 GND
4	IN4 GND
5	IN5 GND

CN92

CN93

1+28

2GND

3+5.5

4GND

5GND

6-12.5

7+12.5

CN94

1PRT

2-2.0

3+2.0

4-30

5STB

6CTL

7GND

8PDN

19

20

7. PARTS LOCATION

FRONT A

Q802 - Q805 Q806

Q801

FRONT B

IC81

IC82

CONNECTOR A

CONNECTOR B

Q137

Q101

IC23

IC24

IC21

IC22

Q135

Q114

21

22