Yamaha ACU16-C User manual

ACU16-C
1
SERVICE MANUAL
PA 011673
20030301-オープンプライス 0.166K-0387 Printed in Japan 2003.02
HAMAMATSU, JAPAN
CONTENTS
SPECIFICATIONS ................................................ 3/4
PANEL LAYOUT .................................... 5
DIMENSIONS ............................................................ 5
CONNECTOR WIRING ................. 6
CIRCUIT BOARD LAYOUT ................. 7
WIRING ..................................................................... 7
BLOCK DIAGRAM .............................. 8
DISASSEMBLY PROCEDURE ............................ 10
LSI PIN DESCRIPTION .............................. 13
IC BLOCK DIAGRAM ................................. 17
CIRCUIT BOARDS ....................................... 20
INSPECTIONS ...................................................... 29/31
TEST PROGRAM .............................. 33/39
OVERALL CIRCUIT DIAGRAMS
PARTS LIST
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。
AMP CONTROL UNIT
（ 総合仕様 ）
（パネルレイアウト）
（
寸法図 ）
（コネクターワイヤリング）
（ユニットレイアウト）
（結線図）
（ブロックダイアグラム）
（分解手順）
（LSI端子機能表）
（ICブロック図）
（シート基板図）
（検査）
（テストプログラム）
（総回路図）
（目次）

ACU16-C
2
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.
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 under-
stood 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-
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.
IMPORTANT : This presentation or sale of this manual to any individual or firm does not constitute authorization certifi-
cation, recognition of any applicable technical capabilities, or establish a principal-agent relationship of
any form.
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
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 parts 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 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.
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。

ACU16-C
3
SPECIFICATIONS
D/A converters 24-bit, 128-times oversampling
Dynamic range 1110 dB typical
Frequency response 20 Hz–20 kHz +0.5, –1.5 dB (nominal output level @ 1 kHz)
Crosstalk –80 dB (@ 1 kHz, between adjacent channels)
Signal delay 0.625 ms (CobraNet to analog output)
Total harmonic distortion
(20 Hz–20 kHz)
+4 dB output Less than 0.05%
Full scale output Less than 0.01%
Hum & noise1
1. Measured using a 6 dB/octave filter @ 12.7 kHz; equivalent to a 20 kHz filter with an infinite dB/octave attenuation.
–92 dB
CobraNet
PRIMARY/SECONDARY
connectors RJ-45 x2 (16 in), transformer isolated, IEEE 802.3
Network status
indicators LINK, CONDUCT, ERROR LEDs
Analog out
Channels CH1–16 balanced outputs
Connector Euro-block connectors 6-way x8
Source impedance 150 Ω
For use with nominal 10k Ωlines
Output level Nominal: +4 dB (1.23 V), Max. before clip: +18 dB (6.16 V)
Computer ports TO COMPUTER 9-pin male D-sub (RS-232C)
USB USB 1.1
Amp control RS-485 RJ-45 x1
Unit ID 0–F (0–15)
Power Requirements U.S./Canada 110–120 V, 50/60 Hz, 40 W
Other 220–240 V, 50/60 Hz, 40 W
Dimensions (W x H x D) 480 x 44.65 x 385.5 mm (18 7/8" x 1 3/4" x 15 5/32"), 1U
Net weight 4.8 kg (10.6 lbs)
Operating free-air temperature range 0–40°C (32–104°F)
Storage temperature range –20 to 60°C (–4 to 140°F)
Supplied Accessories
CD-ROM (NetworkAmp Manager, PDF manual, MIDI drivers)
Power cord and retaining clamp
USB cable
3-way Euro-block connectors x16
Owner's Manual
（総合仕様）

ACU16-C
4
*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
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
*1
110dBtypical
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 ＋4dB出力 0.05%
全スケール出力 0.01%
ハム、ノイズ
*1
−92dB
CobraNet
PRIMARY/SECONDARY
ポート
RJ-45×2（16入力）、トランスフォーマーアイソレート、IEEE802.3
ネットワークインジケー
ター LINK、CONDUCT、ERRORLED
アナログ出力
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）
PCポート TOCOMPUTER 9ピン･オスD-sub（RS-232C）
USB USB1.1
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
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

ACU16-C
5
PANEL LAYOUT
1
2
3
4
Front Panel
USB port
UNIT ID switch
NETWORK STATUS indicators
POWER ON/OFF switch
1
2
3
4
5
6
Grounding screw
AC IN connector
RS-485 port
PRIMARY & SECONDARY CobraNet ports
TO COMPUTER port
Euro-block connectors
Rear Panel
DIMENSIONS
Units: mm
395.8
W:480
44 7.5 349.3 10.2
378
D:385.5
17.5 322 30
0.65
H:44.65
430
（パネルレイアウト）
1
2
3
4
5
6
アース用ネジ
ACIN ソケット
RS-485 ポート
PRIMARY/SECONDARYCobraNet ポート
TOCOMPUTER ポート
ユーロブロックコネクター
1
2
3
4
USB ポート
UNITID スイッチ
NETWORKSTATUS インジケーター
POWERON/OFFスイッチ
（フロントパネル）
（リアパネル）
（寸法図）
（単位）

ACU16-C
6
CONNECTOR WIRING
Pin Connection
Cobra Net
(PRIMARY, SECONDARY)
TxD+
TxD-
RxD+
Unused
Unused
RxD-
Unused
Unused
Pin Connection
RS-485
Unused
Unused
Unused
RxD/TxD+
RxD/TxD-
Unused
FG
FG
Pin Connection
TO COMPUTER
Unused
RxD
TxD
DTR
GND
DSR
RTS
CTS
Unused
（コネクターワイヤリング）

ACU16-C
7
WIRING
POWER
UNIT
（電源
ユニット）
MAIN
DAC2
CM-1
DAC-JACK
DAC-
PSW
DAC-LED
DAC1
CN301 (B)
to MAIN
CN307 to MAIN CN603
CN201
CN601 (B)
CN301
CN604
CN603
CN501 (B)CN501 (B) CN401CN401CN401
CN203
CN801 (B)
CN406
CN307 CN51
CN1
CN306
CN701
V9703000
140
150
V9544800
160
MFA21060
CIRCUIT BOARD LAYOUT
AC INLET
POWER
UNIT
（電源
ユニット）
MAIN
DAC2
CM-1
DAC-JACK
DAC-
PSW
DAC-LED
DAC1
（結線図）
（ユニットレイアウト）

ACU16-C
8
BLOCK DIAGRAM
4Mbit
FLASH 16Mbit
DRAM
MAIN CPU
SH7042A/28MHz
Ø25.8048MHz
MPU_MODE:2
DSP5
(MIXER)
SIO4
DIR2
PLL &
Clock
Generater
8 FS
7 64FS
9 128FS
10 256FS
6 SYNC
5
37
57
86
114
144
MASTER
Clock
60MHz
8MHz
M37641M8
16MHz
IC201
X201
IC316
X302
IC502
IC301 X301
IC203 IC204
IC601 X601
256FS
SYNC
Divider
USB
IC507 508
48k/96k
Master
Clock
selecter
IC505 IC506
IC509
256FS
FS 64FS
FS
IC510
25
6
FS
11.727 MHz
X501
USB CPU
0
8
4C
E
6
2
A
1
3
579
B
D
F
UNIT ID
256kbit
EEPROM
IC221
SW201
CN308
SDA
56 104
105 PE6 VCC
21, 37, 55
77, 103, 100 72, 74
XTAL,
EXTAL
A: 4~20
D: 52-54, 56-60
62-64, 66-70
A0-15 D0-15
52~54, 56 D12-15
84
102
47 50
48 51
RES TIOC 18 TXD1 RXD1 RXD0 TXD0
CK
+5D
PE7
XIN, OUT
14, 15
SCL
6.4512MHz
CKO
LINK
x2
IC504 Clock
selecter
Reset
Output
Control
SYNC_RES
DAC-LED
CN801 CN203
A
A'
6P
6P-B
CONDUCT
ERROR
LD801
LD803
LD804
8
+5D
16, 74
+5D
37
41 CPU CLK 67-69
115-122
SO0~7
18 VDD
VDD
174,
195
96, 76, 58, 24,
20, 12, 9, 194,
173, 143, 124
XI
XO
32, 34 7
43,19
20 21
RX2 TX2
+5D
+5D
+3.3D
+5D
1, 6, 21
+5D
+
5
14
13
10,
6
1, 4, 1
9
5
132
2
16
3
6
14
26
5
5
6
14
2
111
+5D
+5D
+5D
39
35
XI, XO
12, 13
+5D
（ブロックダイアグラム）

ACU16-C
9
D
SP5
XER)
60MHz
RS485
DRIVER
X601
IC307
IC302
DA1~8
NETIN[0~3]
NET_WC
d
er
DRIVER
508
IC506
IC509
256FS_DAC FS_DAC /64FS_DAC
Analog-Output-Circuit
24bit D/A
Converter
AK4393
x4
CH2/1
CH4/3
CH6/5
CH8/7
CH10/9
CH12/11
CH14/13
CH16/15
RS-485
TO COMPUTER
SECONDARY
PRIMARY
CobraNet
Clock
selecter
JK601 JK604
JK605
JK603
JK602
CN402,
CN403
JK602
(CobraNET)
DAC-JACK
CM-1
CN601
CN301
MAIN
CN401
DAC2
DAC1
IC403 IC404
IC503 IC504
A
A' POWER UNIT
DAC-PSW
CN1
3P
5P
AC INLET AC CORD
CN701
POWER
CN51
4P
4P
CN406
+D5 DGND
5P-B
5P 40P
4P-B
4P
CN501
CN306
D1~4
DA5~8
POWER
SUPPLY
+12A
-12A
+5A
+5DA
DAGND
DAGND
IC506~IC511
IC405~IC410
(or CN307)
Analog-Output-Circuit
24bit D/A
Converter
AK4393
x4
IC203 IC204
IC303 IC304
POWER
SUPPLY
+12A
-12A
+5A
DAGND
IC306~IC311
IC205~IC210
4P-B
CN301
4P
CN307
+5DA
DAGND
(or CN306)
21P
21P
CN604
CN201
21P
21P
CN603
67-69
115-122
SO0~7
8VDD96, 76, 58, 24,
20, 12, 9, 194,
173, 143, 124
7
+5D
+12A
8
V+
+5D
14
13
10, 6, 3
1, 4, 10
9
5
132
11
+5D
8
1
15 3
TX2
RX2
4
485RXD
485TXD
+5D
4, 16
+5DA
218
+5A
+12A
8
V+
+5DA
218
-12A
4
-12A
4
+5A
40P
38CA1-8821493

ACU16-C
10
DISASSEMBLY PROCEDURE
Fig.1
Fig.2
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 four (4) screws 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]
[480]
[480]
[480]
[460]
[490]
[400b] [400b]
CM-1
Ass'Y
[400a]
Ferrite Core
（フェライト）

[400b]
MAIN
DAC2
[480]: Bonding Tapping Screw-S 3.0X6 MFZN2BL (V7451800)
[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)
（分解手順）
ボンディングSタイト
＋バインドBタイト
＋ナベ小ネジ
＋バインドSタイト

ACU16-C
11
Fig.3
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 DAC1 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 DAC-JACK 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、DAC-
JACK 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]
[400b]
[400c]
[400d]
[460] [190] [40]
[490]
[410]
POWER
Supply Unit
（電源
ユニット）
DAC1
DAC-JACK
DAC-PSW
Ferrite Core
（フェライト）

[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)
＋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

ACU16-C
12
Fig.4
9. DAC-LED Circuit Board (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. DAC-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)
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]
[480]
DAC-LED
[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

ACU16-C
13
LSI PIN DESCRIPTION
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
I
I
I
I
I
I
I
I
I
I
I
O
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
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端子機能表）

ACU16-C
14
PIN
NO. I/O FUNCTION
NAME PIN
NO. I/O FUNCTION
NAME
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
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
NC
NC
NC
NC
Vdd
Vss
XI
XO
Vdd
/SYNCI
/SYNCO
Vdd
CKI
CKO
CKSEL
Vss
MCKD
/SSYNC
/IC
/TEST
NC
NC
NC
Vdd
Vss
/CS
/WR
/RD
CA7
CA6
CA5
CA4
CA3
CA2
CA1
Vss
Vdd
CD15
CD14
CD13
CD12
CD11
CD10
CD09
CD08
CD07
CD06
Vss
NC
NC
NC
NC
NC
NC
NC
NC
Vdd
Vdd
CD05
CD04
CD03
CD02
CD01
CD00
/WAIT
Vss
SIO00
SIO01
SIO02
SIO03
SIO04
SIO05
SIO06
SIO07
Vss
Vdd
SIO08
SIO09
SIO10
SIO11
SIO12
SIO13
SIO14
SIO15
Vss
Vdd
SIO16
SIO17
SIO18
SIO19
SIO20
SIO21
SIO22
SIO23
Vss
Vdd
SIO24
SIO25
SIO26
SIO27
NC
NC
NC
NC
I
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
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
Not used
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
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
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
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
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
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
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
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
Not used
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
YSS904-F (XV989A00) DSP5 (Digital Signal Processor) MAIN: IC601

ACU16-C
15
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
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
O
O
O
I
I
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
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
DAUX
HDLT
DOUT
VFL
OPT
SYNC
MCC
WC
MCB
MCA
SKSY
XI
XO
P256
LOCK
Vss
TC
DIM1
DIM0
DOM1
DOM0
KM1
I
O
O
O
O
O
O
O
O
O
I
I
O
O
O
O
I
I
I
I
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
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
RSTN
Vdda
CTLN
PCO
(NC)
CTLP
Vssa
TSTN
KM2
KM0
FS1
FS0
CSM
EXTW
DDIN
LR
Vdd
ERR
EMP
CD0
CCK
CLD
I
I
O
I
I
I
I
O
O
I
I
I
O
O
O
O
I
I
System reset input
VCO section power (+5V)
VCO control input N
PLL phase comparison output
VCO control input P
VCO section power (GND)
Test terminal. Open for normal use
Clock mode switching input 2
Clock mode switching input 0
Channel status sampling frequency
display output 1
Channel status sampling frequency
display output 0
Channel status output method selection
External synchronous auxiliary input
word clock
EIAJ (AES/EBU) data input
PLL word clock output
Logic section power (+5 V)
Data error flag output
Channel status emphasis control code
output
3-wire type microcomputer interface data
output
3-wire type microcomputer interface clock
input
3-wire type microcomputer interface load
input
YM3436DK (XG948E0) DIR2 (Digital Format Interface Receiver)
MAIN: IC502

ACU16-C
16
(XV833A00)CPU
PIN
NO. NAME I/O FUNCTION PIN NO. NAME I/O FUNCTION
1D5 I/O 25 TX3
MAIN: IC301
1O
2D6 I/O Data bus 26 RX32 I
3D7 I/O 27 TX32 O Serialdata
4/IRQ0 I/O Interrupt request 28 RX33 I
5/IRQ1 I/O Interrupt request 29 TX33 I/O
6VSS6 Ground 30 /IC I Initial Clear
7/IRQ2 I/O Interrupt request 31 VSS31 Ground
8/IRQ3 I/O Interrupt request 32 XI I Crystal quarts input
9/RD I Read 33 VSS33 Ground
10 /WR I Write 34 XO O Crystal quarts output
11 /CE I Chip enable 35 A0 I
12 /ASTB I 36 A1 I
13 TESTI0 I Test mode 37 A2 I
14 RX0 I 38 A3 I Address bus
15 TX0 O 39 A4 I
16 RX1 I Serial data 40 A5 I
17 TX1 O 41 CPUCLK I Clock
18 VSS18 Ground 42 VSS42 Ground
19 VDD19 Power supply 43 VDD43 Power supply
20 RX2 I 44 D0 I/O
21 TX2 O 45 D1 I/O
22 RX30 I Serial data 46 D2 I/O Data bus
23 TX30 O 47 D3 I/O
24 RX31 I 48 D4 I/O
MBCG46183-129PFV-G
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
DQ1
DQ0
~W
~R
A0
S0
~IBF0
OBF0
CNVSS/VPP
~RESET
P51
P50
VSS
XIN
XOUT
VCC
AVCC
LPF
AVSS
P44
P43
P42
P41
P40
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0
P37
P36
P35
P34
P33
P32
P31
P30
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I
I
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
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
POWER SUPPLY
RESET INPUT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
POWER SUPPLY
CLOCL INPUT
CLOCK OUTPUT
POWER SUPPLY
ANALOG POWER SUPPLY
ROOP FILTER
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
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
P17
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
USB_D+
USB_D-
EXT.CAP
VSS
VCC
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
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
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
I/O
I/O
I/O
I/O
I/O
I/O
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
5 bit INPUT/OUTPUT PORT
5 bit INPUT/OUTPUT PORT
5 bit INPUT/OUTPUT PORT
5 bit INPUT/OUTPUT PORT
5 bit INPUT/OUTPUT PORT
USB D+ VOLTAGE
USB D- VOLTAGE
LINE POWER SUPPLY
POWER SUPPLY
POWER SUPPLY
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
M37641M8-140FP (X2485100) CPU
MAIN: IC316

ACU16-C
17
IC BLOCK DIAGRAM
B1
21
23
VCCA VCCB
24
B8
14
131211
1
2DIR
22G
10A8
3A1
Logic
Level
Converter
Same as above block
VCCA
DIR
A1
A2
A3
A4
A5
A6
A7
A8
GND
GND
VCCB
VCCB
G
B1
B2
B3
B4
B5
B6
B7
B8
GND
(TOP VIEW)
INPUTS OUTPUTS FUNCTION
G
L
L
H
DIR A-BUS B-BUS
L
H
X
A=B OUTPUT INPUT
B=A INPUT OUTPUT
Z High lmpedance X : Don't Care
Z : High lmpedance
1
2
3
4
5
6
7
8
9
10
11
12
15
14
13
18
17
16
21
20
23
24
22
19
TC74LVX4245FS (XU229A00)
MAIN: IC403
TRANSCEIVER
TC74VHC163FT (X2378A00)
MAIN: IC313, 507, 508
TC74VHC138FT
MAIN: IC205, IC206
3-8 DEMULTIPLEXER
(XZ495A00)
1
2
3
4
5
6
7
AA
Select
Enable
Output
Output
BB
CC
G2A G2A
G2B
G2B
G1 G1
Y7 Y7 Y5
Y4
Y3
Y2
Y1
Y0
Y6
16
15
14
13
12
11
10
Vcc
YO
Y1
Y2
Y3
Y4
Y5
8
GND 9Y6
TC74VHC244FT (XW234A00)
MAIN: IC402, IC408, IC409
BUS BUFFER
TC74VHC32FT
MAIN: IC210, IC213, IC216, IC217
OR
(XY945A00)
1
2
3
1A
1Y
42A
52B
62Y
7GND
1B
14
13
12
Vcc
4A
11 4Y
10 3B
93A
83Y
4B
TC7S04F (XM182A00)
1
2
3
5
4
NC
VSS
VDD
OUT
IN
DAC: IC211, IC411
Vcc
RIPPLE
CARRY
OUTPUT
QA
LOAD
GND
ENABLE
P
1
2
3
4
5
6
7
89
10
11
12
13
14
15
16
QC
QD
QB
CLEAR
CLOCK
A
B
C
D
R
C
QA
EN
T
EN
P
QC
QD
QB
CLEAR
CK
A
B
C
D
ENABLE
T
LOAD
1
2
3
4
5
6
7
19
18
17
16
15
14
20
1G
1A1
2Y4
1A2
2Y3
1A3
2Y2
VDD (Vcc)
2G
1Y1
2A4
1Y2
2A3
1Y3
8
9
10
13
12
11
1A4
2Y1
(GND) Vss
2A2
1Y4
2A1
TC7SH04FU (XS775A00)
MAIN: IC413, IC419
INVERTER
（IC ブロック図）

ACU16-C
18
1D1R
2
3
4
5
6
7
8
9
10
A1
A2
A3
A4
A5
A6
A7
A8
GND 11
12
13
14
15
16
17
18
19
20 V
CC
G
B1
B2
B3
B4
B5
B6
B7
B8
TC74VHCT245AFT(XT744A00)
MAIN: IC407, IC410
BUFFER
DS36276M (X2155A00)
MAIN: IC307
HD74LV273ATELL (X2689A00)
MAIN: IC207, IC214, IC218, IC417
D-FF
SN75C1168NSR (XU073A00)
MAIN: IC302
LINE DRIVER
TC74VHC74FT (XV892A00)
MAIN: IC212
D-FF
INPUTS OUTPUTS
PR CLR CLK D Q Q
L
H
H
L
H
Q
O
H
L
H
H
L
Q
O
X
X
X
H
L
X
X
X
X
f
f
L
H
L
L
H
H
H
L
H
L
H
H
H
1
2
3
4
5
6
7
1CLR
1D
1CK
1PR
1Q
1Q
GND
14
13
12
11
10
9
8
VCC
2CLR
CLR
2D
D
2CK
CK
2PRPR
2Q
2QQ
Q
CLR
D
CK
PR
Q
Q
TC74VHC245FT(XU797A00)
DAC: IC201, IC202, IC401, IC402
MAIN: IC219, IC503, 602, 603
74VHC245MTCX (X0296A00)
MAIN: IC219, IC503
1
2
3
4-V
8
7
6
5
Output A +V
Non-Inverting
Input A
-DC Voltage Supply
+DC Voltage
Supply
Output B
Inverting
Input B
Non-Inverting
Input B
Inverting
Input A
+-
+-
DAC: IC205, IC206, IC306, IC307, IC405,
IC406, IC506, IC507
OP AMP
µPC4570G2 (XF291A00)
DAC: IC207-210, IC308-311, IC407-410,
IC508-511
NJM4580ED(XT157A00)
TC74VHC04FT (X0195A00)
MAIN: IC509
INVERTER
1
2
3
4
5
6
7
1A
1Y
2A
2Y
3A
3Y
Vss
14
13
12
11
10
9
8
VDD
6A
6Y
5A
5Y
4A
4Y
1CLEAR
2
3
4
5
6
7
8
9
10
1Q
1D
2D
2Q
3Q
3D
4D
4Q
GND 11
12
13
14
15
16
17
18
19
20 V
CC
8Q
8D
7D
7Q
6Q
6D
5D
5Q
CLOCK
QQ
DD
CK CK
CL CL
QQ
DDCK CK
CL CL
QQ
DD
CK CK
CL CL
QQ
DD CK CK
CL CL
1
2
3
4
R8
7
6
5
RO
DE
DI
V
CC
DO/RI
DO/RI
GND
RE
D
1
2
3
4
5
6
7
1B
1A
1R
1DE
2R
2A
2B
16
15
14
13
12
11
10
Vcc
1D
1Y
1Z
2DE
2Z
2Y
8
GND 92D
TC74VHC125FT (XY074A00)
MAIN: IC412, IC505, IC506
BUFFER
1
2
3
4
5
6
7
C1
A1
Y1
C2
A2
Y2
GND
14
13
12
11
10
9
8
Vcc
C4
A4
Y4
C3
A3
Y3

ACU16-C
19
TC7WH04FU
MAIN: IC419
INVERTER
(XY363A00) TC7WH14FU
MAIN: 207, 317
SCHMITT INVERTER
(XY806A00)
TC7WH08FU (XW948A00)
MAIN: IC209
AND
MAIN: IC504
Clock Generator
W194-70G(XW492A00)
4
PHASE
DETECTOR
VCO
CHARGE
PUMP
LOOP
FILTER
N
FS0
7
3GND
VDD
5
FS1
(Reference
Input)
2
IN
1
FBIN
OUTPU T
BUFFER
OUTPU T
BUFFER
2
OUT1
6
OUT2
8
1
2
3
4
7
6
5
81A
3Y
2A
GND
Vcc
1Y
3A
2Y
1
2
3
4
7
6
5
81A
3Y
2A
GND
Vcc
1Y
3A
2Y
1
2
3
45
6
7
8
FBIN
IN
GND
FS0
OUT2
VDD
OUT1
FS1
1
2
3
45
6
7
8
1A
1B
2Y
GND
VCC
1Y
2B
2A

ACU16-C
20
CN604: to DAC2-CN401
CN603: to DAC1-CN201
CN301: to DAC-JACK-CN601
A
A'
MAIN Circuit Board
IN: 3NA-V848170
CIRCUIT BOARDS
（シート基板図）