Yamaha LMY4-DA Service Manual

DA CARD

LMY4-DA

SERVICE MANUAL

PA

■ CONTENT

NOTICE OF CHANGES IN LMY4-DA S/M ............................... 3

SPECIFICATIONS .................................................................... 4

PANEL LAYOUT........................................................................ 4

DIMENSIONS ........................................................................... 4

BLOCK DIAGRAM .................................................................... 5

LSI PIN DESCRIPTION ............................................................ 6

IC BLOCK DIAGRAM................................................................ 7

CIRCUIT BOARD...................................................................... 8

TEST PROGRAM ................................................................... 10

PARTS LIST OVERALL CIRCUIT BOARD

011504

*.**K-** K Printed in Japan '00.9

LMY4-DA

IMPORTANT NOTICE

This manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumed that basic service procedures inherent to the industry, and more specifically Yamaha Products, are already known and understood by the users, and have therefore not been restated.

WARNING: Failure to follow appropriate service and safety procedures when servicing this product may result in personal injury,

destruction of expensive components, and failure of the product to perform as specified. For these reasons, we advise all Yamaha product owners that all service required should be performed by an authorized Yamaha Retailer or the appointed service representative.

IMPORTANT: The presentation or sale of this manual to any individual or firm does not constitute authorization, certification or

recognition of any applicable technical capabilities, or establish a principle-agent relationship of any form.

The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering, and service departments of Yamaha are continually striving to improve Yamaha products. Modifications are, therefore, inevitable and changes in specification are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please contact the distributor's Service Division.

WARNING: Static discharges can destroy expensive components. Discharge any static electricity your body may have

accumulated by grounding yourself to the ground bus in the unit (heavy gauge black wires connect to this bus).

IMPORTANT: Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power to the unit.

WARNING: CHEMICAL CONTENT NOTICE!

The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and /or plastic (where applicable) components may also contain traces of chemicals found by the California Health and Welfare Agency (and possibly other entities) to cause cancer and/or birth defects or other reproductive harm.

DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHATSOEVER!

Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyes to solder/flux vapor!

If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling food.

2

■ NOTICE OF CHANGES IN LMY4-DA S/M

IC BLOCK DIAGRAM

Losic IC HD74LV245AFPEL (IS024500) is changed to Losic IC 74VHC245SJX (XY874A00)

TEST PROGRAM

Test program is newly provided. (Page 10)

LMY4-DA

3

LMY4-DA

■ SPECIFICATIONS

Output

Terminals

GAIN

switch

Actual Source

Impedance

+24 dB

CH 1-4

+18 dB +15 dB

* 0 dB is referenced to 0.775 Vrns. ** 1=GND, 2=HOT, 3=COLD

■ PANEL LAYOUT

150ohm

For Use With

Nominal

600ohm Lines

Output Level

Nominal

+10 dB (2.45 V)*

+4 dB (1.23 V)*

+1 dB (870 mV)*

Maximum. Before Clip

+24 dB (12.3 V)* +18 dB (6.16 V)* +15 dB (4.36 V)*

Connector

XLR-3-32 type

(Balanced)**

■ DIMENSIONS

40

66

28

4.5111

(4.5)

1

24.524

24

(23.5)

120

1

18

337

322.1

301.8

(1.3)

100

Unit: mm

4

■ BLOCK DIAGRAM

DA

LMY4-DA

O1 a/3 O2 b/3

SYNCM

b/15

128FSM

b/17

A9 a/32 A8 b/31

A10 b/32 D00 a/34

D01 b/34 D02 a/35 D03 b/35 D04 a/36 D05 b/36 D06 a/37 D07 b/37

IC001, IC002

6

11

5

14

7

17

8

19

2-4

16-18

2-9

11-18

3 4

DAFC

5

IC007

6

33

/RES

/RESDA

16

15

Reg.

IC103, 104, 105

2

D/A

IC100

D/A

IC200

22-23

16-17

20-21

4

1-2

4

22-23

16-17 20-21

1-2

22-23

11 14 17 19

6

D/A

IC300

16-17 20-21

4

1-2

4

6

D/A

IC400

22-23

16-17 20-21

1-2

1

Amp

3

IC101

6

7

Amp

5

IC104

REGULATOR

2

1

Amp

3

IC201

6

7

Amp

5

IC204

REGULATOR

2

1

Amp

3

IC301

6

7

Amp

5

IC304

REGULATOR

2

1

Amp

3

IC401

6

7

Amp

5

IC404

REGULATOR

IC102 IC103

6

5

24dB

18dB

15dB

SW100

3

6

5

24dB

18dB

15dB

SW200

3

6

5

24dB

18dB

15dB

SW300

3

6

5

24dB

18dB

15dB

SW400

3

2

7

Amp

3

IC500

2

3

IC202 IC203

2

7

Amp

3

2

3

IC302

2

7

Amp

3

2

3

IC402

2

7

Amp

3

IC800

2

3

Amp

IC600

Amp

IC700 Amp

Amp

1

6 5

2 3

6 5

2 3

6 5

2 3

IC403

6 5

2 3

Amp Amp

IC303

Amp Amp

2

7 1

[SIGNAL]

2

7 1

[SIGNAL]

2

7 1

[SIGNAL]

2

7 1

[SIGNAL]

1

[CH1]

3

1

[CH2]

3

1

[CH3]

3

1

[CH4]

3

KEC-92518

5

LMY4-DA

■ LSI PIN DESCRIPTION

AK4393-VF-E2 (XW029A00) D/A CONVERTER

NAME I/O FUNCTION

No.

1

10 11 12

13 14

2 3 4

5 6

7 8

9

DVSS DVDD

MCLK

PD

BICK

SDATA

LRCK

SMUTE

CS

DFS

DEM0

CCLK

DEM1

CDTI

DIF0 DIF1 DIF2

-

Digital Ground Pin

-

Digital Power Supply Pin, 3.3V or 5.0V

I

Master Clock Input Pin

I

Power-Down Mode Pin

When at "L",the Ak4393 is in power-down mode and is held in reset.

The AK4393 should always be reset I I

I I

I I I I I I I

upon power-up.

Audio Serial Data Clock Pin The clock of 64fs or more than is recommended to be input on this pin. Audio Serial Data Input Pin

2's complement MSB-first data is input on this pin.

L/R Clock Pin Soft Mute Pin

When this pin goes "H", soft mute cycle is initiated.

When returning "L",the output mute releases.

Chip Select Pin in serial mode Doubla speed sampling mode Pin (Internal pull-down pin)

"L":Normal Speed, "H":Double Speed

De-emphasis Enable pin Control Data Clock Pin in serial mode De-emphasis Enable pin Control Data Input Pin in serial mode

Digital Input Format Pin

NAME I/O FUNCTION

No.

15 16 17 18

19 20

21 22

23

24 25 26

27 28

BVSS VREFL VREFH

AVDD

AVSS

AOUTR-

AOUTR+

AOUTL-

AOUTL+

VCOM

P/S

CKS0

CKS1

CKS2

I I

-

O O

O

I I

Substrate Ground Pin, 0V Low Level Voltage Reference Input Pin High Level Voltage Reference Input Pin Analog Power Supply Pin,5V

Analog Ground Pin, 0V Rch Negative analog output Pin

Rch Positive analog output Pin Lch Negative analog output Pin

Lch Positive analog output Pin

Common Voltage Output Pin,2.6V Parallel/Serial Select Pin(Internal pull-up pin)

"L":Serial control mode,"H": Parallel control mode

Master Clock Select Pin

DA: IC100,200,300,400

YSZ914B-F (XY080A00) DAFC

NAME I/O FUNCTION

No.

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22

VDD

VSS

SI1 SI0

SYNC/LR

BCKI

128Fs

VSS

VDD

MUTE0

SO0

VDD

VSS

SO1 MUTE1 MUTE2

SO2

WCKO

SO3

BCKO

VSS

VDD

O O

O O O O O O O

System power supply 5v/3.3V System ground

I

Serial input (ch2, 3)

I

Serial input (ch0, 1)

I

Synchronous input

I

Bit clock input (system lock)

I

128Fs input IO ground

IO power supply 5v/3.3V ch0 Hi level mute output ch0 serial output System power supply 5v/3.3V System ground ch1 serial output ch1 Hi level mute output ch2 Hi level mute output ch2 serial output Word clock of serial output ch3 serial output Bit clock of serial output IO ground IO power supply 5v/3.3V

NAME I/O FUNCTION

No.

23 24 25 26 27 28 29 30

31 32 33 34 35 36 37 38 39 40 41 42 43 44

MUTE3

VDD VSS

FIX

KM1

TEST

KM0

ISM

PRO

LENG

RESET

VSS

VDD IMOD0 IMOD1 IMOD2

FS0

FS1 GSEL0 GSEL1

OMOD0 OMOD1

O

I I I I I

I I I

I I I I I I I I I

ch3 Hi level mute output System power supply 5v/3.3V System ground Cross fade ON/OFF BCKI phase selection Normally not yet connected 0:test Setting of frame synchronization Setting of a number of channels for one input line Setting of probit Setting of word length for probit Reset System ground System power supply 5v/3.3v

Setting of input format

Setting of sampling rate Setting of floating gain Setting of output format

DA: IC007

6

■ IC BLOCK DIAGRAM

LMY4-DA

NJM2068MD-T1 (XJ553A00) Dual Operatinal Amplifier

DA: IC101, 102, 201, 202, 301, 302,

401, 402, 500, 600, 700, 800

+-

+DC Voltage

8

Supply

7

Output B

Inverting

6

Input B Non-Inverting

5

Input B

Output A +V Inverting

Input A

Non-Inverting

Input A

-DC Voltage Supply

1

2

3

4-V

+-

SN74LV138ANSR (IS013810)

DECODER

DA: IC003

1

A

2

B

Select

3

C

4

G2A G2A

5

G2B G2B

Enable

Output

ENABLEINPUTS

G1 G2A G2B C B A Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7

X X L H H H H H H H H

G1 G1

Y7 Y7

GND

H

X

H

X

L

6

7

8

SELECTINPUTS

X

L

H

L

H

L

H

L

H

L

H

L

H

16

A

Y6

Vcc

15

Y0Y0

14

Y1Y1

13

Y2Y2

12

Y3

Output

11

Y4Y4

10

Y5Y5

9

Y6

OUTPUTS

H

L

H

L

H

L

H

L

H

L

H

L

H

L

H

NJM4556AL (XP844A00) Dual Operatinal Amplifier

DA: IC103, 203, 303, 403

+

1A2 3 4 5 6 7 8

IN V

+

IN

OUT

AAA

74VHC245SJX (XY874A00)

+

IN

BBB

B

OUT

+

VIN

Octal 3-State Bus Buffer

DA: IC001, 002, 004, 005, 008, 009

1D1R

2

A1

3

A2

4

A3

5

A4

6

A5

7

A6

8

A7

A8

9

GND

10

H H H H H H H H H H L

CC

V

20

OE

19

B1

18

B2

17

B3

16

B4

15

B5

14

B6

13

B7

12

B8

11

HD74LV08AFPEL (IS000800)

Qual 2 Input AND

DA: IC010

GND

1

2

1B

31A1Y

42A

52B

62Y

7 VSS

14

13

12

11 4Y

10 3B

93A

83Y

Vcc

4B

4A

HD74LV273AFPEL(IS027300)

Octal 3-State D-Type Flip Flop

DA: IC006

CLR

1

1Q

2

QQ

1D

DD

3

2D

4

D QQ

2Q

5

3Q

6

QQ D

3D

7

4D

8

DDCK Q

4Q

9

10 11

CL CL

CK CK

CL

CL CL

CK

CL

Vcc

20

8Q

19

8D

18

7D

17

CK

DCK

CL

7Q

16

6Q

15

CK

D

6D

14

5D

13

CK CL

Q

5Q

12

CLKGND

7

LMY4-DA

■ CIRCUIT BOARD

DA Circuit Board

GAIN SWITCH

SW100: CH1 SW200: CH2 SW300: CH3 SW400: CH4

A

A'

A

Component side

DA: V412960

8

Yamaha LMY4-DA Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

■ NOTICE OF CHANGES IN LMY4-DA S/M

■ SPECIFICATIONS

■ PANEL LAYOUT

■ DIMENSIONS

■ BLOCK DIAGRAM

■ LSI PIN DESCRIPTION

■ IC BLOCK DIAGRAM

■ CIRCUIT BOARD