Yamaha ACU-16-C Service Manual

ACU16-C

AMP CONTROL UNIT

SERVICE MANUAL

このサービスマニュアルはエコパルプ（ECF：無塩素系漂白パルプ）を使用しています。

011673

PA

20030301-オープンプライス

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 per-

IMPORTANT : This presentation or sale of this manual to any individual or firm does not constitute authorization certifi-

The data provided is belived 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

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

sonal 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.

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

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

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 WHAT SO EVER!

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.

WARNING: THIS APPARATUS MUST BE EARTHED

IMPORTANT

THE WIRES IN THIS MAINS LEAD ARE COLOURED IN ACCORDANCE WITH THE FOLLOWING CODE:

GREEN-AND-YELLOW : EARTH BLUE : NEUTRAL BROWN : LIVE As the colours of the wires in the mains lead of this apparatus may

not correspond with the coloured markings identifying the terminals in your plug, proceed as follows:

The wire which is coloured GREEN and YELLOW must be connected to the terminal in the plug which is marked by the letter E or by the safety earth symbol or coloured GREEN and YELLOW.

The wire which is coloured BLUE must be connected to the terminal which is marked with the letter N or coloured BLACK.

The wire which is coloured BROWN must be connected to the terminal which is marked with the letter L or coloured RED.

* This applies only to products distributed by YAMAHA KEMBLE

MUSIC (U.K.) LTD.

WARNING

Componentshavingspecialcharacteristicsaremarkedandmustbe replacedwithpartshavingspecificationequaltothoseoriginallyinstalled.

印の商品は、安全を維持するために重要な部品です。交換する場合は、

安全のために必ず指定の部品をご使用下さい。

2

ACU16-C

SPECIFICATIONS

D/A converters Dynamic range Frequency response Crosstalk Signal delay

Total harmonic distortion (20 Hz–20 kHz)

Hum & noise

CobraNet

Analog out

Computer ports

Amp control RS-485 Unit ID

Power Requirements

Dimensions (W x H x D) Net weight Operating free-air temperature range Storage temperature range

Supplied Accessories

1. Measured using a 6 dB/octave filter @ 12.7 kHz; equivalent to a 20 kHz filter with an infinite dB/octave attenuation.

1

（総合仕様）

+4 dB output Full scale output

PRIMARY/SECONDARY connectors

Network status indicators

Channels Connector Source impedance For use with nominal Output level TO COMPUTER USB

U.S./Canada Other

24-bit, 128-times oversampling 110 dB typical

20 Hz–20 kHz +0.5, –1.5 dB (nominal output level @ 1 kHz) –80 dB (@ 1 kHz, between adjacent channels)

0.625 ms (CobraNet to analog output) Less than 0.05% Less than 0.01%

–92 dB

RJ-45 x2 (16 in), transformer isolated, IEEE 802.3

LINK, CONDUCT, ERROR LEDs

CH1–16 balanced outputs Euro-block connectors 6-way x8 150 Ω 10k Ω lines Nominal: +4 dB (1.23 V), Max. before clip: +18 dB (6.16 V) 9-pin male D-sub (RS-232C) USB 1.1 RJ-45 x1 0–F (0–15) 110–120 V, 50/60 Hz, 40 W 220–240 V, 50/60 Hz, 40 W 480 x 44.65 x 385.5 mm (18 7/8" x 1 3/4" x 15 5/32"), 1U

4.8 kg (10.6 lbs) 0–40°C (32–104°F) –20 to 60°C (–4 to 140°F)

CD-ROM (NetworkAmp Manager, PDF manual, MIDI drivers) Power cord and retaining clamp USB cable 3-way Euro-block connectors x16 Owner's Manual

3

ACU16-C



D/Aコンバータ 24ビット、128倍オーバーサンプリング ダイナミックレンジ 周波数特性 20Hz〜20kHz＋0.5,−1.5dB（ノミナル出力レベル@1kHz）クロストーク −80dB（@1kHz隣接チャンネル間） シグナルディレイ 0.625ms（CobraNet →アナログ出力）

全高調波歪

ハム、ノイズ

CobraNet

アナログ出力

PCポート

アンプコントロール RS-485 RJ-45×1 ユニットID 0〜F（0〜15） 電源 100V、50/60Hz、40W 最大外形寸法 （W ×H×D） 480×44.65×385.5mm、1U 重量 4.8kg 動作環境温度 0〜40℃ 保管温度 −20〜60℃

付属品

*1

＋4dB出力 0.05% 全スケール出力 0.01%

*1

PRIMARY/SECONDARY ポート

ネットワークインジケー ター

チャンネル CH1〜16バランス出力 コネクター 6ピン･ユーロブロックコネクター×8 ソースインピーダンス 150Ω ノミナルレベル 10kΩライン 出力レベル ノミナル：＋4dB（1.23V）、クリップ前最大：＋18dB（6.16V） TOCOMPUTER 9ピン･オスD-sub（RS-232C） USB USB1.1

110dBtypical

−92dB

RJ-45×2（16入力）、トランスフォーマーアイソレート、IEEE802.3

LINK、CONDUCT、ERRORLED

CD-ROM（NetworkAmpManager、PDF形式取扱説明書、 MIDIドライバ） 電源コード、誤脱防止クランプ 電源プラグ変換アダプター USBケーブル 3ピン･ユーロブロックコネクター×16 取扱説明書

*1 6dB/oct.フィルター＠12.7kHz；20kHzフィルター∞ dB/oct.アッテネーションと同等

4

ACU16-C

PANEL LAYOUT

Front Panel

Rear Panel

（フロントパネル）

1

USB port

2

UNIT ID switch

3

NETWORK STATUS indicators

4

POWER ON/OFF switch

（リアパネル）

（パネルレイアウト）

1

USB ポート

2

UNITID スイッチ

3

NETWORKSTATUS インジケーター

4

POWERON/OFFスイッチ

1

Grounding screw

2

AC IN connector

3

RS-485 port

4

PRIMARY & SECONDARY CobraNet ports

5

TO COMPUTER port

6

Euro-block connectors

DIMENSIONS

（寸法図）

430

1

アース用ネジ

2

ACIN ソケット

3

RS-485 ポート

4

PRIMARY/SECONDARYCobraNet ポート

5

TOCOMPUTER ポート

6

ユーロブロックコネクター

30

378

D:385.5

W:480

395.8

7.5 349.3 10.2

44

0.65

17.5 322

H:44.65

Units: mm

（単位）

5

ACU16-C

CONNECTOR WIRING

RS-485

Pin Connection

Unused

（コネクターワイヤリング）

Cobra Net (PRIMARY, SECONDARY)

Pin Connection

TxD+

TO COMPUTER

Pin Connection

Unused Unused Unused RxD/TxD+ RxD/TxDUnused FG FG

TxDRxD+ Unused Unused RxDUnused Unused

RxD

TxD

DTR

GND

DSR

RTS

CTS

Unused

6

ACU16-C

CIRCUIT BOARD LAYOUT

DAC2

DAC1

（ユニットレイアウト）

DAC-JACK

CM-1

（電源 ユニット）

MAIN

AC INLET

POWER

UNIT

DAC-

PSW

WIRING

DAC1

CN301 (B)

to MAIN

CN307

（結線図）

CN201

CN603

DAC2

CN501 (B)CN501 (B) CN401CN401CN401

MAIN

MFA21060

150

CN604

CN603

CN301

CN601 (B)

CM-1

CN307

DAC-LED

DAC-JACK

CN306

CN406

140

V9703000

CN1

POWER

UNIT

（電源 ユニット）

CN51

CN203

DAC-LED

CN801 (B)

160

V9544800

DAC-

PSW

CN701

7

ACU16-C

6

5

6

BLOCK DIAGRAM

UNIT ID

USB

SW201

8

79

62A

5

B

4C

D

3

E

1

F

0

CN308

IC316

USB CPU

M37641M8

IC221

256kbit

EEPROM

SDA

SCL

56

+5D

16, 74

XIN, OUT

14, 15

16MHz

X302

（ブロックダイアグラム）

+5D

8

104 105

IC201

PE6 PE7

+5D

21, 37, 55 77, 103, 100

VCC

MAIN CPU

SH7042A/28MHz

Ø25.8048MHz MPU_MODE:2

RES

TIOC 18

D12-15

84

102

52~54, 56

X201

6.4512MHz

72, 74

XTAL, EXTAL

TXD1

RXD1

RXD0

47

48

51

A0-15

CK

TXD0

50

D0-15

A: 4~20 D: 52-54, 56-60 62-64, 66-70

CKO

41

+5D

IC203 IC204

37

4Mbit

FLASH

IC301

CPU CLK

SIO4

RX2

TX2

20

21

+5D

1, 6, 21

16Mbit DRAM

8MHz

X301

IC601

32, 34 7

XI

XO

43,19

+3.3D

174, 195

114 144

5 37 57 86

VDD

256FS

SYNC

DSP5

(MIXER)

18

A

SO0~7

VDD

96, 76, 58, 24, 20, 12, 9, 194, 173, 143, 124

+5D

60MHz X601

67-69

115-122

LD801

LD803

LD804

LINK

CONDUCT

ERROR

CN801

6P-B

CN203

6P

FS

IC502

35

PLL & Clock

Generater

11.727 MHz

SYNC_RES

DIR2

XI, XO

X501

+5D

12, 13

39

MASTER

Clock

8 FS 7 64FS 9 128FS 10 256FS 6 SYNC

256FS

26

x2

IC504

FS 64FS

IC510

FS

Reset

Output

2

Control

5

14

+5D

IC505

48k/96k

Master

Clock

selecter

5 6

+5D

14

3 6

+5D

Divider

IC507 508

IC506

13

132216

9

selecter

5

111

IC509

Clock

+

14

25

10,

1, 4, 1

DAC-LED

A'

8

SP5 XER)

8

A

7

SO0~7

VDD

96, 76, 58, 24, 20, 12, 9, 194, 173, 143, 124

+5D

IC506

IC509

13

60MHz

X601

67-69

115-122

ACU16-C

MAIN

CM-1

CN402, CN403

NETIN[0~3]

40P

5P 40P

485RXD

485TXD

NET_WC

IC307

1

RS485

4

DRIVER

IC302

+5D

8

4, 16

CN301

DRIVER

15 3

TX2

RX2

CN306

(or CN307)

+5DA

CN501

4P

4P-B

DAGND

DA1~8

D1~4

+5D

14

21P

CN604

21P

CN401

(CobraNET)

POWER SUPPLY

DAGND

IC403 IC404 IC503 IC504

AK4393 24bit D/A

Converter

+5DA

x4

218

+5A

JK601

JK602

CN601

5P-B

DAC-JACK

+12A

-12A +5A

+12A

IC405~IC410 IC506~IC511

8

V+

Analog-Output-Circuit

DAC2

-12A

JK604

PRIMARY

CobraNet

JK605

JK603

SECONDARY

RS-485

JK602

TO COMPUTER

CH2/1

CH4/3

CH6/5

4

CH8/7

er

508

256FS_DAC FS_DAC /64FS_DAC

Clock

132

9

selecter

10, 6, 3

5

11

1, 4, 10

+D5

DGND

4P

CN406

A'

CN307

(or CN306)

+5DA

DAGND

DA5~8

CN51

4P

POWER UNIT

4P

21P

CN603

CN301

4P-B

21P

CN201

CN1

POWER SUPPLY

DAGND

IC203 IC204 IC303 IC304

AK4393 24bit D/A

Converter

+5DA

5P

x4

218

+5A

DAC-PSW

3P

+12A

-12A +5A

+12A

IC205~IC210 IC306~IC311

8

V+

Analog-Output-Circuit

DAC1

POWER

4

-12A

CH10/9

CH12/11

CH14/13

CH16/15

AC INLET

AC CORD

CN701

38CA1-8821493

9

ACU16-C



DISASSEMBLY PROCEDURE

（分解手順）

1. Top Cover (Time required: 1 minute)

1-1 Remove the eleven (11) screws marked [480]. The

top cover can then be removed. (Fig. 1)

2. CM-1 Assembly (Time required: 2 minutes)

2-1 Remove the top cover. (See Procedure 1.) 2-2 Remove the four (4) screws marked [400a]. The CM-

1 assembly can then be removed. (Fig. 2)

When removing the CM-1 assembly , use care so as not to bend connector pins of CN402 and CN403.

3. MAIN Circuit Board (Time required: 3 minutes)

3-1 Remove the top cover. (See Procedure 1.) 3-2 Remove the CM-1 assembly. (See Procedure 2.) 3-3 Remove the nine (9) screws marked [400b]. The

MAIN circuit board can then be removed. (Fig. 2)

4. DAC2 Circuit Board (Time required: 3 minutes)

4-1 Remove the top cover. (See Procedure 1.) 4-2 Remove the f our (4) scre ws marked [490] fixing the

circuit board and eight (8) screws marked [460] from the rear panel. The DAC2 circuit board can then be removed. (Fig. 2)

1. トップカバー（所要時間:1 分）

1-1. ネジ[480]11本を外し、トップカバーを外します。

(Fig.1)

2. CM-1Ass'y（所要時間:2 分）

2-1. トップカバーを外します。（1 項参照） 2-2. ネジ[400a]4本を外し、CM-1Ass'y を外します。

(Fig. 2)

※CN402、403のコネクタピンを曲げない様、注意し

て外して下さい。

3. MAIN シート（所要時間:3分）

3-1. トップカバーを外します。（1 項参照） 3-2. CM1Ass'yを外します。（2 項参照） 3-3. ネジ[400b]9本を外し、MAIN シートを外します。

(Fig. 2)

4. DAC2 シート（所要時間:3分）

4-1. トップカバーを外します。（1 項参照） 4-2. シートを止めているネジ[490]4本と、リアパネルの

ネジ[460]8本を外し、DAC2シートを外します。

(Fig. 2)

[480]

[480]: Bonding Tapping Screw-S 3.0X6 MFZN2BL (V7451800)

Fig.1

[480]

ボンディングSタイト

[400]: Bind Head Tapping Screw-B 3.0X6 MFZN2BL (EP600230) [460]: Pan Head Screw 2.6X6 MFZN2BL (VC990500) [490]: Bind Head Tapping Screw-S 3.0X6 MFZN2BL (EP630210)

[400b]

[460]

[490]

DAC2

MAIN

[400a]

Ferrite Core

（フェライト）

CM-1 Ass'Y

[400b]

＋バインドBタイト ＋ナベ小ネジ ＋バインドSタイト

Fig.2

10

ACU16-C



5. DAC1 Circuit Board (Time required: 6 minutes)

5-1 Remove the top cover. (See Procedure 1.) 5-2 Remove the DAC2 circuit board. (See Procedure 4.) 5-3 Remove the four (4) screws marked [400a] fixing

the circuit board and eight (8) screws marked [460] from the rear panel. The D A C1 circuit board can then be removed. (Fig. 3)

6. DAC-JACK Circuit Board (Time required: 2 minutes)

6-1 Remove the top cover. (See Procedure 1.) 6-2 Remove the two (2) screws marked [400b] from the

circuit board, two (2) jack sockets marked [190] and two (2) screws marked [410] from the rear panel. The DA C-J ACK circuit board can then be removed. (Fig. 3)

7. Power Unit (Time required: 2 minutes)

7-1 Remove the top cover. (See Procedure 1.) 7-2 Remove the four (4) screws marked [400c] from the

circuit board. The power unit can then be removed. (Fig. 3)

8. AC INLET Assembly (Time required: 2 minutes)

8-1 Remove the top cover. (See Procedure 1.) 8-2 Remove the two (2) supports marked [40] from the

rear panel. The AC INLET assembly can then be removed. (Fig. 3)

5. DAC1 シート（所要時間:6分）

5-1. トップカバーを外します。（1項参照） 5-2. DAC2シートを外します。（4 項参照） 5-3. シートを止めているネジ[400a]4本とリアパネルの

ネジ[460]8 本を外し、DAC1シートを外します。

(Fig. 3)

6. DAC-JACK シート（所要時間:2分）

6-1. トップカバーを外します。（1項参照） 6-2. シートのネジ[400b]2本、及びリアパネルのジャッ

クソケット[190]2 本とネジ[410]2本を外し、DACJACK シートを外します。(Fig.3)

7. 電源ユニット（所要時間:2 分）

7-1. トップカバーを外します。（1項参照） 7-2. シートのネジ[400c]4本を外し、電源ユニットを外

します。(Fig.3)

8. ACINLETAss'y（所要時間:2 分）

8-1. トップカバーを外します。（1項参照） 8-2. リアパネルのサポート[40]2本を外し、ACINLET

Ass'y を外します。(Fig.3)

[400a]

[460] [190]

DAC1

[410]

[400b]

DAC-JACK

[40]

POWER

Supply Unit

（電源 ユニット）

[490]

Ferrite Core

（フェライト）

[400c]

[400d]

DAC-PSW

[400]: Bind Head Tapping Screw-B 3.0X6 MFZN2BL (EP600230) [410]: Bonding Screw 3.0X8 MFZN2BL (VP157800) [490]: Bind Head Tapping Screw-S 3.0X6 MFZN2BL (EP630210)

Fig.3

＋バインドBタイト＋ボンディング小ネジ ＋バインドSタイト

11

ACU16-C

9. DAC-LED Circuit Boar d (Time required: 2 minutes)

9-1 Remove the top cover. (See Procedure 1.) 9-2 Remove the two (2) screws marked [480] from the

front panel and then remove the front panel assembly.

9-3 Remove the four (4) screws marked [400] from the

circuit board. The DAC-LED circuit board can then be removed. (Fig. 4)

10. DA C-PSW Circuit Board (Time required: 2 minutes)

10-1 Remove the top cover. (See Procedure 1.) 10-2 Remove the front panel assembly. (See Procedure 9-2.) 10-3 Remove the PSW knob. 10-4 Remove the two (2) screws marked [490] fixing the

switch and one (1) screw marked [400d] fixing the circuit board. The DAC-PSW circuit board can then be removed. (Fig. 3)

[480]

9. DAC-LED シート（所要時間:2分）

9-1. トップカバーを外します。（1 項参照） 9-2. フロントパネルのネジ[480]2本を外し、フロントパ

ネル Ass'yを外します。

9-3. シートのネジ[400]4本を外し、DAC-LEDシートを

外します。(Fig.4)

10. DAC-PSW シート（所要時間:2 分）

10-1. トップカバーを外します。（1 項参照） 10-2. フロントパネル Ass'y を外します。（9-2 項参照） 10-3. PSW ノブを外します。 10-4. スイッチを止めているのネジ[490]2本とシートを止

めているネジ[400d]1本を外し、DAC-PSWシートを外します。(Fig.3)

[480]

[400]

[400]: Bind Head Tapping Screw-B 3.0X6 MFZN2BL (EP600230) [480]: Bind Tapping Screw-S 3.0X6 MFZN2BL (V7451800)

＋バインドBタイト ボンディングSタイト

Fig.4

DAC-LED

12

ACU16-C

PIN NO.

I/O FUNCTIONNAME

PIN NO.

I/O FUNCTIONNAME

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56

DACK0

PE15

VSS

A0 A1 A2 A3 A4 A5 A6 A7 A8

A9 A10 A11 A12 A13 A14 A15 A16

VCC

A17

VSS

/RAS

/CASL

/CASH

VSS

RDWR / PB5

A18 A19 A20

/IRQ7/A21

VSS

/RD

/WDTOVF

/WRH

VCC

/WRL

VSS /CS1 /CS0

/IRQ3 / TCLKC /IRQ2 / TCLKC

/CS3 /CS2

/IRQ1 TXD1 RXD1

SCKO PA1 / TXD0 PA0 / RXD0

D15 D14 D13 VSS D12

O O

I O O O O O O O O O O O O O O O O O

I O

I O O O O O O O O O

I O O O

I O

I O O O

I O O

I O

I

I O

I

I/O I/O I/O

I

I/O

(Port E) Port E Ground

Address bus

Power supply Address bus Ground Row address strobe Column address strobe (low) Column address strobe (high) Ground DRAM read/write / Port B

Address bus Port B / Address bus

Ground Read Watch dog timer overflow High write Power supply Low write Ground Chip select Chip select Port A / Timer clock Interrupt request / Timer clock Chip select Chip select Interrupt request Data transmission Data reception Interrupt request Port A / Data transmission Port A / Data reception

Data bus Ground

Data bus

57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98

99 100 101 102 103 104 105 106 107 108 109 110 111 112

D11 D10

D9 D8

VSS

D7 D6 D5

VCC

D4 D3 D2 D1 D0

VSS

XTAL

MD3

EXTAL

MD2

NMI VCC MD1 MD0

PLLVCC PLLCAP PLLVSS

PA15 / CK

/RES

/DREQ0

PE1 PE2 PE3 PE4

VSS

AN0 / PF0 AN1 / PF1 AN2 / PF2 AN3 / PF3 AN4 / PF4 AN5 / PF5

AVSS AN6 / PF6 AN7 / PF7

AVCC

VSS

TIOC1B

VCC

PE6 PE7 PE8 PE9

PE10

VSS PE11 PE12 PE13

I/O I/O I/O I/O

I I/O I/O I/O

I I/O I/O I/O I/O I/O

I

O

I

O

I

O O O O O

I

O O O

Data bus

Ground Data bus Power supply

Data bus

Ground Crystal oscillator Mode control Crystal oscillator Mode control Non-maskable interrupt request Power supply Mode control Mode control PLL Power supply PLL capacitor PLL Ground Port A / Clock Reset

Port E

Ground

Analog input / Port F

Analog ground Analog input / Port F Analog input / Port F Power supply Ground (Port E) Power supply

Port E

Ground Port E

HD6477042AF28 (X3250A00A00) CPU

MAIN: IC201

LSI PIN DESCRIPTION

（LSI端子機能表）

13

ACU16-C

YSS904-F (XV989A00) DSP5 (Digital Signal Processor)

PIN NO.

100 101 102 103 104

/RD

Vss

NC NC NC NC

Vss XO

CKI

Vss

/IC NC

NC NC

Vss /CS

NC NC NC NC NC NC NC NC

NC NC NC NC

I/O

Not used

I

XI

O O

I

O

I

O

I I

I I I

I I I I I I I I I I

I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O

I/O I/O I/O I/O I/O I/O

O

I/O I/O I/O I/O I/O I/O I/O I/O

I/O I/O I/O I/O

Ground Power supply System master clock input (60 MHz or 30 MHz) System master clock output (High or 30 MHz) Ground Sync. signal input Sync. signal output Ground System clock input (30 MHz) System clock output (30 MHz) System master clock select Power supply Serial clock input (256 fs) Serial. signal input Initial clear Test mode setting (0: TEST, 1: Normal)

Not used Ground

Power supply Chip select Write enable input Read enable input

CPU address bus

Power supply Ground

CPU data bus

Power supply

Not used

Ground

CPU data bus

Wait output Power supply

Serial data bus

Power supply Ground

Serial data bus

Power supply Ground

Serial data bus

Power supply Ground

Serial data bus

Not used

FUNCTION

NAME

1 2 3 4 5

Vdd 6 7 8 9

Vdd

10

/SYNCI

11

/SYNCO

12

Vdd

13 14

CKO

15

CKSEL 16 17

MCKD

18

/SSYNC 19 20

/TEST 21 22 23 24

Vdd 25 26 27

/WR 28 29

CA7 30

CA6 31

CA5 32

CA4 33

CA3 34

CA2 35

CA1 36 37

Vdd 38

CD15

39

CD14

40

CD13

41

CD12

42

CD11

43

CD10

44

CD09

45

CD08

46

CD07

47

CD06 48 49 50 51 52 53 54 55 56 57

Vdd

58

Vdd

59

CD05 60

CD04 61

CD03 62

CD02 63

CD01 64

CD00 65

/WAIT 66 67

SIO00 68

SIO01 69

SIO02 70

SIO03 71

SIO04 72

SIO05 73

SIO06 74

SIO07 75 76

Vdd

77

SIO08 78

SIO09 79

SIO10 80

SIO11 81

SIO12 82

SIO13 83

SIO14 84

SIO15 85 86

Vdd

87

SIO16 88

SIO17 89

SIO18 90

SIO19 91

SIO20 92

SIO21 93

SIO22 94

SIO23 95 96

Vdd

97

SIO24 98

SIO25 99

SIO26

SIO27

PIN NO.

105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208

NAME

NC NC NC

NC SIO28 SIO29 SIO30 SIO31

Vss

Vdd SIO32 SIO33 SIO34 SIO35 SIO36 SIO37 SIO38 SIO39

Vss

Vdd SIO40 SIO41 SIO42 SIO43 SIO44 SIO45 SIO46 SIO47

Vss SIO48 SIO49 SIO50 SIO51 SIO52 SIO53 SIO54 SIO55

Vss

Vdd

Vdd SIO56 SIO57 SIO58 SIO59 SIO60 SIO61 SIO62 SIO63

NC NC NC NC NC NC NC NC

Vss

/POE

Vss PIO00 PIO01 PIO02 PIO03 PIO04 PIO05 PIO06 PIO07

Vss

Vdd

Vdd PIO08 PIO09 PIO10 PIO11 PIO12 PIO13 PIO14 PIO15

Vss

NC PIO16 PIO17 PIO18 PIO19 PIO20 PIO21 PIO22 PIO23

Vss Vdd

Vdd PIO24 PIO25 PIO26 PIO27 PIO28 PIO29 PIO30 PIO31

Vss

NC NC NC NC

MAIN: IC601

I/O

Not used

I/O I/O I/O I/O

I/O I/O I/O I/O I/O I/O I/O I/O

I

I/O I/O I/O I/O I/O I/O I/O I/O

Serial data bus

Power supply Ground

Serial data bus

Power supply Ground

Serial data bus

Power supply

Serial data bus

Power supply Ground

Serial data bus

Not used

Power supply Parallel data bus controll signal Power supply

Parallel data bus

Power supply Ground

Parallel data bus

Power supply Not used

Parallel data bus

Power supply Ground

Parallel data bus

Power supply

Not used

FUNCTION

14

ACU16-C

PIN No.

NAME I/O FUNCTION

PIN No.

NAME I/O FUNCTION

1 2 3 4

5 6

7 8

9

10 11 12

13 14

DVSS DVDD

MCLK

PD

BICK

SDATA

LRCK

SMUTE

CS

DFS

DEM0

CCLK

DEM1

CDTI

DIF0 DIF1 DIF2

-

I I

I I I I I I I

Digital Ground Pin Digital Power Supply Pin, 3.3V or 5.0V Master Clock Input Pin 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

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

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

AK4393-VF-E2 (XW029A00) DAC

DAC: IC203, 204, 303, 304, 403, 404, 503, 504

YM3436DK (XG948E0) DIR2 (Digital Format Interface Receiver)

NO.

DAUX

1

HDLT

2

DOUT

3

VFL

4

OPT

5

SYNC

6

MCC

7 8

MCB

9

MCA

10

SKSY

11 12 13

P256

14

LOCK

15 16 17

DIM1

18

DIM0

19

DOM1

20

DOM0

21

KM1

22

WC

XI

XO

Vss

TC

I/O FUNCTIONNAME

I O O O O O O O O O

I

I O

O O O

I

Auxiliary input for audio data Asynchronous buffer operation flag Audio data output Parity flag output Fs x 1 Synchronous output signal for DAC Fs x 1 Synchronous output signal for DSP Fs x 64 Bit clock output Fs x 1 Word clock output Fs x 128 Bit clock output Fs x 256 Bit clock output Clock synchronization control input

Crystal oscillator connection or external clock input Crystal oscillator connection VCO oscillating clock connection

PLL lock flag Logic section power (GND) PLL time constant switching output Data input mode selection Data input mode selection

Data output mode selection Data output mode selection Clock mode switching input 1

NO.

23

RSTN

24

Vdda

25

CTLN

26

PCO

27

(NC)

28

CTLP

29

Vssa

30

TSTN

31

KM2

32

KM0

33

FS1

34

FS0

35

CSM

36

EXTW

37

DDIN 38 39

Vdd

40

ERR

41

EMP

42

CD0

43

CCK

44

CLD

LR

I/O FUNCTIONNAME

I

System reset input VCO section power (+5V)

I

VCO control input N

O

PLL phase comparison output

I

VCO control input P VCO section power (GND)

I

Test terminal. Open for normal use

I

Clock mode switching input 2

I

Clock mode switching input 0

O

Channel status sampling frequency display output 1

O

Channel status sampling frequency display output 0

I

Channel status output method selection

I

External synchronous auxiliary input word clock

I

EIAJ (AES/EBU) data input

O

PLL word clock output Logic section power (+5 V)

O

Data error flag output

O

Channel status emphasis control code output

O

3-wire type microcomputer interface data output

I

3-wire type microcomputer interface clock input

I

3-wire type microcomputer interface load input

MAIN: IC502

15

ACU16-C

MBCG46183-129PFV-G

PIN NO.

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

M37641M8-140FP

PIN NO.

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

NAME I/O FUNCTION

1 2 3 4 5 6 7 8 9

D5 I/O D6 I/O Data bus

D7 I/O /IRQ0 I/O Interrupt request /IRQ1 I/O Interrupt request

VSS6 Ground /IRQ2 I/O Interrupt request /IRQ3 I/O Interrupt request

/RD I Read

/WR I Write

/CE I Chip enable

/ASTB I

TESTI0 I Test mode

RX0 I TX 0 O RX1 I TX 1 O

VSS18 Ground

VDD19 Power supply

RX2 I

TX2 O RX30 I TX 30 O RX31 I

(X2485100) CPU

I/O FUNCTIONNAME

DQ1 DQ0

~IBF0

OBF0 CNVSS/VPP ~RESET

VSS

XOUT

VCC

AVCC

AVSS

PB7 PB6 PB5 PB4 PB3 PB2 PB1 PB0

~W

~R A0 S0

P51 P50

XIN

LPF P44

P43 P42 P41 P40

P37 P36 P35 P34 P33 P32 P31 P30

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I

POWER SUPPLY

I

RESET INPUT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT POWER SUPPLY

I

CLOCL INPUT

O

CLOCK OUTPUT POWER SUPPLY ANALOG POWER SUPPLY

O

ROOP FILTER

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

(XV833A00) CPU

Serial data

NO.

PIN NO.

41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80

NAME I/O FUNCTION

TX3

25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48

USB_D+

USB_D-

EXT.CAP

1O RX32 I TX32 O

Serial data

RX33 I TX33 I/O

/IC I Initial Clear

VSS31 Ground

XI I Crystal quarts input

VSS33 Ground

XO O Cry stal quarts output

A0 I A1 I A2 I A3 I

Address bus A4 I A5 I

CPUCLK I Clock

VSS42 Ground

VDD43 Power supply

D0 I/ O D1 I/ O D2 I/ O

Data bus

D3 I/ O D4 I/ O

I/O FUNCTIONNAME

P17

I/O P16 P15 P14 P13 P12 P11 P10

PO7 PO6 PO5 PO4 PO3 PO2 PO1 PO0

P27 P26 P25 P24 P23 P22 P21 P20 P74 P73 P72 P71 P70

VSS VCC DQ7 DQ6 DQ5 DQ4 DQ3 DQ2

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

5 bit INPUT/OUTPUT PORT

I/O

5 bit INPUT/OUTPUT PORT

I/O

5 bit INPUT/OUTPUT PORT

I/O

5 bit INPUT/OUTPUT PORT

I/O

5 bit INPUT/OUTPUT PORT

I/O

USB D+ VOLTAGE

I/O

USB D- VOLTAGE

I/O

LINE POWER SUPPLY POWER SUPPLY POWER SUPPLY

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

I/O

8 bit INPUT/OUTPUT PORT

MAIN: IC301

MAIN: IC316

16

ACU16-C

IC BLOCK DIAGRAM

TC74LVX4245FS (XU229A00)

MAIN: IC403

TRANSCEIVER

V

CCA VCCB

1

2DIR

22G

3A1

10A8

TC74VHC138FT

Same as above block

(XZ495A00)

MAIN: IC205, IC206

3-8 DEMULTIPLEXER

Converter

Logic Level

23

131211

（IC ブロック図）

1

VCCA

2

DIR

3

GND

A1

A2

4

5

A3

6

A4

7

A5

8

A6

9

A7

10

A8

11

12

24

21

B1

14

B8

TC74VHC163FT (X2378A00)

MAIN: IC313, 507, 508

(TOP VIEW)

24

CCB

V

23

VCCB

22

G

21

B1

20

B2

19

B3

18

B4

17

B5

16

B6

15

B7

14

B8

INPUTS

OUTPUTS

DIR A-BUS B-BUS

GND

G

L

H

L H

X

13

FUNCTION

A=B OUTPUT INPUT B=A INPUT OUTPUT

Z High lmpedance

TC74VHC244FT (XW234A00)

MAIN: IC402, IC408, IC409

BUS BUFFER

X : Don't Care Z : High lmpedance

1

A

Select

Enable

Output

GND

G2A

G2B

2

B

3

C

4

G2A

5

G2B

6

G1

7

Y7 Y5

Y7

8

TC74VHC32FT

16

A

B

15

Y0

14

C

Y1

13

Y2

12

Y3

11

Y4

10

Y6

9

(XY945A00)

MAIN: IC210, IC213, IC216, IC217

OR

1

2

1B

31A1Y

42A

52B

62Y

7GND

14

13

12

11 4Y

10 3B

93A

83Y

1

1G

16

R C

QA

CLEAR

QB

QC

QD

EN

T

15

14

13

12

11

10

9

Vcc RIPPLE

CARRY OUTPUT

QA

QB

QC

QD ENABLE

T LOAD

1A1

2Y4

1A2

2Y3

1A3

2Y2

1A4

2Y1

(GND) Vss

2

3

4

5

6

7

8

9

10

1

Vcc

YO

Y1

Y2

Output

Y3

Y4

Y5

Y6

CLEAR

CLOCK

ENABLE P

GND

2

CK

3

A

4

B

C

5

C

LOAD

6

D

D EN

7

P

8

20

DD (Vcc)

V

19

2G

18

1Y1

17

2A4

16

1Y2

15

2A3

14

1Y3

13

2A2

12

1Y4

11

2A1

TC7S04F (XM182A00)

DAC: IC211, IC411

TC7SH04FU (XS775A00)

MAIN: IC413, IC419

INVERTER

Vcc

4B

4A

VSS

1

NC

2

IN

3

5

VDD

4

OUT

17

ACU16-C

TC74VHC245FT(XU797A00)

DAC: IC201, IC202, IC401, IC402 MAIN: IC219, IC503, 602, 603

74VHC245MTCX (X0296A00)

MAIN: IC219, IC503

TC74VHCT245AFT(XT744A00)

MAIN: IC407, IC410

BUFFER

V

CC

20

G

19

B1

18

B2

17

B3

16

B4

15

B5

14

B6

13

B7

12

11

B8

GND

1D1R

A1

2

A2

3

A3

4

A4

5

A5

6

A6

7

A7

8

A8

9

10

DS36276M (X2155A00)

MAIN: IC307

RO

1

RE

2

3

DE

4

DI

8

V

R

D

CC

7

DO/RI

6

DO/RI

GND

5

TC74VHC74FT (XV892A00)

MAIN: IC212

D-FF

1

1CLR

2

D

1D

3

1CK

1PR

GND

PR CLR CLK D Q Q

L H L H H H

CK

4

PR

5

Q

1Q

6

Q

1Q

7

INPUTS OUTPUTS

X

H

X

L

X

L

f

H

f

H

L

H

14

VCC

13

CLR

2CLR

D

12

CLR

2D

11

CK

2CK

10

2PRPR

9

Q

2Q

8

2QQ

H

X X X H L X

L

H

L

H

O

Q

HD74LV273ATELL (X2689A00)

MAIN: IC207, IC214, IC218, IC417

D-FF

V

CC

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

11

CLOCK

GND

1CLEAR

1Q

2

1D

3

2D

4

2Q

5

3Q

6

3D

7

4D

8

4Q

9

10

QQ

CL CL

CK CK

DD

D

CL

QQ

CL CL

CK

D

DDCK

CL

Q

NJM4580ED (XT157A00)

DAC: IC207-210, IC308-311, IC407-410, IC508-511

µPC4570G2 (XF291A00)

DAC: IC205, IC206, IC306, IC307, IC405, IC406, IC506, IC507

OP AMP

+DC Voltage

+-

8

7

6

5

Supply Output B

Inverting Input B

Non-Inverting Input B

Output A +V

Inverting

Input A

Non-Inverting

Input A

-DC Voltage Supply

1

2

3

4-V

SN75C1168NSR (XU073A00)

MAIN: IC302

LINE DRIVER

1

1B

2

1A

3

1R

4

1DE

5

2R

6

2A

7

2B

8

GND

18

TC74VHC04FT (X0195A00)

MAIN: IC509

INVERTER

16

Vcc

15

1D

14

1Y

13

1Z

12

2DE

11

2Z

10

2Y

9

2D

Vss

1

1A

2

1Y

3

2A

4

2Y

5

3A

6

3Y

7

14

VDD

13

6A

12

6Y

11

5A

10

5Y

9

4A

8

4Y

TC74VHC125FT (XY074A00)

MAIN: IC412, IC505, IC506

BUFFER

1

GND

C1

2

A1

3

Y1

4

C2

5

A2

6

Y2

7

14

Vcc

13

C4

12

A4

11

Y4

10

C3

9

A3

8

Y3

ACU16-C

TC7WH04FU

MAIN: IC419

INVERTER

1

2

3Y

2A

3

GND

4

W194-70G

MAIN: IC504

Clock Generator

4

FS0

FS1

5

(XW492A00)

FBIN

1

N

(XY363A00)

81A

Vcc

7

1Y

6

3A

5

2Y

TC7WH08FU (XW948A00)

MAIN: IC209

AND

CC

1

1A

2

1B

2Y

3

4

GND

7

VDD

3

GND

FBIN

IN

GND

FS0

V

8

1Y

7

6

2B

5

2A

1

2

3

4

TC7WH14FU

MAIN: 207, 317

SCHMITT INVERTER

3Y

2A

GND

OUT2

8

VDD

7

6

OUT1

5

FS1

(XY806A00)

1

2

3

4

81A

Vcc

7

1Y

6

3A

5

2Y

IN

(Reference Input)

PHASE

2

DETECTOR

VCO

2

CHARGE

PUMP

LOOP

FILTER

OUTPU T

BUFFER

OUTPU T BUFFER

6

OUT1

8

OUT2

19

ACU16-C

CIRCUIT BOARDS

MAIN Circuit Board

（シート基板図）

A

CN301: to DAC-JACK-CN601

CN604: to DAC2-CN401 CN603: to DAC1-CN201

20

A'

IN: 3NA-V848170

601

ACU16-C

A

CN403: to CM-1 CN402: to CM-1

A'

CN306: to DAC2-CN501 CN307: to DAC1-CN301

to POWER Supply

CN203: to DAC-LED-CN801

Component side（部品側）

21

Yamaha ACU-16-C Service Manual

CONTENTS

SPECIFICATIONS

PANEL LAYOUT

DIMENSIONS

CONNECTOR WIRING

CIRCUIT BOARD LAYOUT

WIRING

BLOCK DIAGRAM

DISASSEMBLY PROCEDURE

6. DAC-JACK Circuit Board (Time required: 2 minutes)

LSI PIN DESCRIPTION

IC BLOCK DIAGRAM

CIRCUIT BOARDS