Yamaha AS1000BL User manual

■CONTENTS
TO SERVICE PERSONNEL .......................................... 2
FRONT PANEL .............................................................. 3
REAR PANELS .......................................................... 3–6
REMOTE CONTROL PANELS ...................................... 6
SPECIFICATIONS / 参考仕様 .......................................... 7
INTERNAL VIEW ........................................................... 8
SERVICE PRECAUTIONS/
サービス時の注意事項 .................................................... 9
DISASSEMBLY PROCEDURES /分解手順 ............. 9–18
AMP ADJUSTMENT /アンプ部調整 ............................. 19
UPDATING FIRMWARE/
ファームウェアの書き込み..................................... 20–25
SELF-DIAGNOSTIC FUNCTION/
ダイアグ（自己診断機能） ..................................... 26–28
IC DATA ................................................................. 29–32
PIN CONNECTION DIAGRAMS ............................ 33–34
BLOCK DIAGRAM ....................................................... 35
PRINTED CIRCUIT BOARDS................................ 36–54
SCHEMATIC DIAGRAMS ...................................... 55–61
REPLACEMENT PARTS LIST .............................. 63–83
REMOTE CONTROL.............................................. 84–85
101091
SERVICE MANUAL
STEREO AMPLIFIER
Copyright © 2008 All rights reserved.
This manual is copyrighted by YAMAHA and may not be copied or
redistributed either in print or electronically without permission.
P.O.Box 1, Hamamatsu, Japan
'08.05
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 any 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 specifications 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 buss in the unit (heavy gauge black wires connect to this buss).
IMPORTANT: Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power to the unit.
A-S1000
A-S1000

2
A-S1000
A-S1000
WALL
OUTLET EQUIPMENT UNDER TEST
AC LEAKAGE
TESTER OR
EQUIVALENT
INSULATING
TABLE
WARNING: CHEMICAL CONTENT NOTICE!
This product contains chemicals known to the State of California to cause cancer, 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.
1. Critical Components Information
Components having special characteristics are marked s
and must be replaced with parts having specifications equal
to those originally installed.
2. Leakage Current Measurement (For 120V Models Only)
When service has been completed, it is imperative to verify
that all exposed conductive surfaces are properly insulated
from supply circuits.
●Meter impedance should be equivalent to 1500 ohms shunted
by 0.15µF.
●Leakage current must not exceed 0.5mA.
●Be sure to test for leakage with the AC plug in both polarities.
本機に搭載されているすべての基板およびハンダ付けによる接合
部は無鉛ハンダでハンダ付けされています。
無鉛ハンダにはいくつかの種類がありますが、修理時には下記の
ような無鉛ハンダの使用を推奨します。
・ Sn+Ag+Cu（錫+銀+銅）
・ Sn+Cu（錫+銅）
・ Sn+Zn+Bi（錫+亜鉛+ビスマス）
注意：
無鉛ハンダの融点温度は通常の鉛入りハンダに比べ30〜40℃
程度高くなっていますので、それぞれのハンダに合ったハンダ
ごてをご使用ください。
All of the P.C.B.s installed in this unit and solder joints are
soldered using the lead free solder.
Among some types of lead free solder currently available,
it is recommended to use one of the following types for the
repair work.
• Sn + Ag + Cu (tin + silver + copper)
• Sn + Cu (tin + copper)
• Sn + Zn + Bi (tin + zinc + bismuth)
Caution:
As the melting point temperature of the lead free solder is
about 30°C to 40°C (50°F to 70°F) higher than that of the lead
solder, be sure to use a soldering iron suitable to each solder.
About lead free solder / 無鉛ハンダについて
■TO SERVICE PERSONNEL
For U model
“CAUTION”
“F1: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 10A,
125V FUSE.”
For C model
CAUTION
F1: REPLACE WITH SAME TYPE 10A, 125V FUSE.
ATTENTION
F1: UTILISER UN FUSIBLE DE RECHANGE DE MÉME TYPE DE 10A, 125V.

7
A-S1000
A-S1000
435 (17-1/8")
137 (5-3/8")
465 (18-5/16")
418 (16-7/16") 25
(1")
22
(7/8")
16
(5/8")
121 (4-3/4")
371 (14-5/8")
362 (14-1/4")
■SPECIFICATIONS / 参考仕様
U .......... U.S.A. model
C .......... Canadian model
R .......... General model
T .......... Chinese model
K .......... Korean model
A .......... Australian model
B .......... British model
G .......... European model
L .......... Singapore model
J ........... Japanese model
•DIMENSIONS / 寸法図
■Audio Section / オーディオ部
Minimum RMS Output Power (Power Amp. Section) /
定格出力（パワーアンプ部）(20 Hz to 20 kHz, 0.02 % THD)
8 ohms ......................................................................... 90 W + 90 W
6 ohms .................................................................... 105 W + 105 W
4 ohms .................................................................... 140 W + 140 W
Dynamic Power / ダイナミックパワー(IHF)
8/6/4/2 ohms ..................................................... 105/135/190/220 W
Maximum Output Power [B, G models] (1 kHz, 0.7 % THD, 4 ohms)
............................................................................................... 160 W
Maximum Useful Output Power / 実用最大出力(JEITA)
[R, T, K, L, J models] (1 kHz, 10 % THD)
8 ohms ................................................................................... 115 W
4 ohms ................................................................................... 190 W
Power Band Width / パワーバンド
8 ohms (MAIN L/R drive) ........................................ 10 Hz to 50 kHz
Dynamic Headroom / ダイナミックヘッドルーム
8 ohms ................................................................................. 0.67 dB
IEC Output Power [B, G models] (1 kHz, 0.02 % THD)
8 ohms ..................................................................................... 90 W
4 ohms ................................................................................... 145 W
Damping Factor / ダンピングファクター (1 kHz, 8 ohms)
...................................................................................... 160 or more
Maximum Input Signal / 最大許容入力(1 kHz)
CD, etc. (0.5 % THD)................................................... 2.8 V or less
PHONO (0.003 % THD) MM .................................. 120 mV or less
MC ....................................... 7 mV or less
Frequency Response / 周波数特性
CD, etc.
Flat position, 5 Hz to 100 kHz .................................... +0 / -3.0 dB
Flat position, 20 Hz to 20 kHz .................................... +0 / -0.3 dB
RIAA Equalization Deviation / RIAA偏差 (20 Hz to 20 kHz)
PHONO MM ........................................................................ ±0.5 dB
MC ......................................................................... ±0.5 dB
Total Harmonic Distortion / 全高調波歪率 (20 Hz to 20 kHz)
CD, etc. to SP OUT (90 W, 8 ohms) .......................0.015 % or less
PHONO MM (2 V, to REC) .....................................0.005 % or less
MC (2 V, to REC) ........................................ 0.05 % or less
Intermodulation Distortion / 混変調歪率 (Rated output, 8 ohms)
CD, etc. to SP OUT .............................................................. 0.02 %
Signal to Noise Ratio / 信号対雑音比 (IHF-A Network) (Input shorted)
CD, etc. (150 mV) ...................................................... 98 dB or more
PHONO MM (5 mV) .................................................. 93 dB or more
MC (500 µV) ................................................ 85 dB or more
Residual Noise / 残留ノイズ (IHF-A Network)
FRONT L/R SP OUT .................................................. 73 µV or less
■Control Section / コントロール部
Input Sensitivity/Input Impedance / 入力感度／入力インピーダンス
CD, etc. .............................................................. 150 mV/47 k-ohms
PHONO MM ....................................................... 2.5 mV/47 k-ohms
MC ........................................................... 100 µV/50 ohms
MAIN IN .................................................................... 1 V/47 k-ohms
Output Level/ Output Impedance / 入力電圧／インピーダンス
REC OUT .......................................................... 150 mV/1.5 k-ohms
PRE OUT ................................................................. 1 V/1.5 k-ohms
Rated Output Voltage / 出力電圧／インピーダンス
PRE OUT .......................................................... 150 mV/1.5 k-ohms
REC OUT ................................................................. 1 V/1.5 k-ohms
Headphone Rated Output / ヘッドホン出力／インピーダンス
1 kHz, 150 mV, 0.2 % THD, 32 ohms ............... 23 mW / 100 ohms
Channel Separation / チャンネルセパレーション (1 kHz/10 kHz)
CD, etc. (5.1 k-ohms terminated) .........................74/54 dB or more
PHONO (Input shorted, Vol: -30 dB) MM ........... 90/77 dB or more
MC ............ 66/65 dB or more
Tone Control Characteristics / トーンコントロール特性
BASS
Boost/Cut (50 Hz) ................................................................ ±9 dB
Turnover frequency ............................................................ 350 Hz
TREBLE
Boost/Cut (20 Hz) ................................................................ ±9 dB
Turnover frequency ........................................................... 3.5 kHz
Audio Muting / ミュート
............................................................................... -20 dB (approx.)
■General / 総合
Power Supply /電源電圧
U, C models ...........................................................AC 120 V, 60 Hz
R, L models .......................... AC 110/120/220/230-240 V, 50/60 Hz
T model .................................................................. AC 220 V, 50 Hz
K model ..................................................................AC 220 V, 60 Hz
A model ..................................................................AC 240 V, 50 Hz
B, G models ...........................................................AC 230 V, 50 Hz
J model ............................................................ AC 100 V, 50/60 Hz
Power Consumption/ 消費電力
U, C, R, T, K, A, B, G, L models ........................................... 350 W
J model .................................................................................. 220 W
Maximum Power Consumption/ 最大消費電力
1 kHz, 10 % THD, 8 ohms .................................................... 700 W
Idling Power Consumption/ アイドル時消費電力
................................................................................................. 80 W
Off-state Power Consumption/ パワーOFF時消費電力
................................................................................................... 0 W
Dimensions (W x H x D) /寸法（幅×高さ×奥行き）
.......................... 435 x 137 x 465 mm (17-1/8”x 5-3/8”x 18-5/16”)
Weight /質量
....................................................................... 22.0 kg (48 lbs. 8 oz)
Finish/仕上げ
Black color ................................ U, C, R, T, K, A, B, G, L, J models
Silver color ................................ U, C, R, T, K, A, B, G, L, J models
Accessories /付属品
Remote control x 1, Battery (R6, AA, UM-3) x 2, Power cable (2 m) x 1
* Specifications are subject to change without notice due to product
improvements.
※ 参考仕様および外観は予告なく変更されることがあります。
Unit: mm (inch)
単位：mm（インチ）

8
A-S1000
A-S1000
■INTERNAL VIEW
1FRONT (14) P.C.B. (R, L models)
2FUNCTION (3) P.C.B.
3FRONT (13) P.C.B.
4MAIN (2) P.C.B.
5FUNCTION (2) P.C.B.
6POWER TRANSFORMER
7MAIN (3) P.C.B.
8MAIN (1) P.C.B.
9FRONT (12) P.C.B.
0FRONT (11) P.C.B.
AFRONT (9) P.C.B.
BFRONT (2) P.C.B.
CFRONT (1) P.C.B.
DFRONT (3) P.C.B.
EFRONT (6) P.C.B.
FFRONT (5) P.C.B.
GFRONT (4) P.C.B.
HFRONT (7) P.C.B.
IFUNCTION (1) P.C.B.
JFRONT (10) P.C.B.
23 5 7 96 014 8
Top view
Front view
Rear view
J
GFEA
I
H
BC D

A-S1000
9
■DISASSEMBLY PROCEDURES / 分解手順
(Remove parts in the order as numbered.)
Disconnect the power cable from the AC outlet.
1. Removal of Panel Side L/R
a. Remove 2 screws (1), 2 coned disc spring L and 2
washers side. (Fig. 1)
b. Lift the panel side L upward and release 3 hooks. Then
remove the panel side L. (Fig. 1)
c. Remove 2 screws (2), 2 coned disc spring L and 2
washers side. (Fig. 1)
d. Lift the panel side R upward and release 3 hooks. Then
remove the panel side R. (Fig. 1)
2. Removal of Top Cover
a. Remove 7 screws (3), 2 screws (4) and 2 screws
(5). (Fig. 1)
b. Remove the top cover. (Fig. 1)
3. Removal of Front Panel
*Prepare an Allen wrench (2 mm) for removal of
knob unit.
a. Loosen lock set screw to remove the knob VOL unit.
(Fig. 1)
b. Loosen lock set screw to remove the knob SEL unit.
(Fig. 1)
c. Loosen each lock set screw to remove 3 knob TC unit.
(Fig. 1)
d. Remove 8 screws (6). (Fig. 1)
e. Set the “POWER ON/OFF” switch to the ON position.
f. Remove the front panel forward gradually using care
not to cause damage the switches. (Fig. 1)
（番号順に部品を取り外してください。）
AC電源コンセントから、電源コードを抜いてください。
1. パネルサイドL/Rの外し方
a. 1のネジ2本を外し、サラバネL2個とワッシャーサイド
2個を外します。（Fig.1）
b. パネルサイドLを上に持ち上げ、3ヶ所のフックを外
し、パネルサイドLを取り外します。（Fig.1）
c. 2のネジ2本を外し、サラバネL2個とワッシャーサイド
2個を外します。（Fig.1）
d. パネルサイドRを上に持ち上げ、3ヶ所のフックを外
し、パネルサイドRを取り外します。（Fig.1）
2. トップカバーの外し方
a. 3ネジ7本、4のネジ2本、5のネジ2本を外します。
（Fig.1）
b. トップカバーを取り外します。（Fig.1）
3. フロントパネルの外し方
※ ノブユニットを取り外す場合、6角レンチ（2mm）を
準備します。
a. 止めネジを緩め、ノブVOLユニットを取り外します。
（Fig.1）
b. 止めネジを緩め、ノブSELユニットを取り外します。
（Fig.1）
c. 止めネジを緩め、ノブTCユニット3個を取り外しま
す。（Fig.1）
d. 6のネジ8本を外します。（Fig.1）
e. POWERON/OFFスイッチをONにします。
f. 各スイッチに傷がつかないよう注意してフロントパネ
ルを前方へゆっくり取り外します。（Fig.1）
Fig. 1
■SERVICE PRECAUTIONS / サービス時の注意事項
安全対策
・ この製品の内部には高電圧部分があり危険です。修理の
際は、絶縁性の手袋を使用するなどの安全対策を行って
ください。
・ 下記箇所には電源をOFFにした後も電荷が残り、高電圧
が維持されており危険です。
修理作業前に放電用抵抗（5kΩ/10W）を下記箇所の端子
間に接続して放電してください。放電所用時間は約30
秒間です。
1. MAIN（3）P.C.B.のC308
2. MAIN（3）P.C.B.のC309
3. MAIN（3）P.C.B.のC335
4. MAIN（3）P.C.B.のC336
PRINTEDCIRCUITBOARDS：MAIN（3）P.C.B.を参
照してください。
Safety measures
• Some internal parts in this product contain high volt-
ages and are dangerous. Be sure to take safety mea-
sures during servicing, such as wearing insulating
gloves.
• Note that positions indicated below are dangerous even
after the power is turned off because an electric charge
remains and a high voltage continues to exist there.
Before starting any repair work, perform discharge by
connecting a discharge resistor (5k-ohms/10W) be-
tween terminals at following positions. The time re-
quired for discharging is about 30 seconds.
1. C308 on MAIN (3) P.C.B..
2. C309 on MAIN (3) P.C.B..
3. C335 on MAIN (3) P.C.B..
4. C336 on MAIN (3) P.C.B..
Refer to “PRINTED CIRCUIT BOARDS: MAIN (3) P.C.B.”.
*When installing the knob unit, it is necessary to position
them as specified. (Refer to “When installing the knob
unit”.)
※ ノブユニットを取り付ける場合、決められた位置に合
わせる必要があります。（「ノブユニットを取り付ける
場合」参照）
Panel side L
パネルサイドL
Panel side R
パネルサイドR
Washer side
ワッシャーサイド
Washer side
ワッシャーサイド
Coned disc spring L
サラバネL
Coned disc spring L
サラバネL
Front panel
フロントパネル
Top cover
トップカバー
6
6
3
1
3
4
5
2
Hook
フック
Hook
フック
POWER ON / OFF switch
POWERON/OFFスイッチ
Hook
フック
Knob VOL unit
ノブVOLユニット
An Allen wrench
6角レンチ
Knob SEL unit
ノブSELユニット
Knob TC unit
ノブTCユニット
2mm
Lock set screw
止めネジ

A-S1000
10
Knob VOL unit
ノブVOLユニット
Slit
スリット
Cut
カット位置
Lock set screw
止めネジ
Lock set screw
止めネジ
Lock set screw
止めネジ
Center position of BALANCE
BALANCE中央
VR501
SW501
VR504
VOLUME MIN VOLUME MAX
Knob SEL unit
ノブSELユニット
Knob TC unit
ノブTCユニット
Front panel
フロントパネル
0.5–0.75mm
● ノブVOLユニットを取り付ける場合：
a. VOLUME（VR501）を左いっぱいに回します。
（Fig.2）
b. ノブVOLユニットのスリットをVOLUMEMIN
の位置に合わせ、取り付けます。（Fig.2）
※ このとき、まだ止めネジは締めません。
c. フロントパネルからノブVOLユニットまで0.5〜
0.75mm程度隙間をあけます。（Fig.2）
d. VOLUME（VR501）のカット位置に止めネジ位置
を合わせ、止めネジを締めます。（Fig.2）
e. 取り付け後、次の動作を確認します。
・ ノブVOLユニットを左右に回し、フロント
パネルに擦っていないか?
・ ノブVOLユニットを右いっぱいに回し、ノ
ブVOLユニットのスリットがVOLUME
MAXの位置に合うか?
・ ノブVOLユニットを左いっぱいに回し、ノ
ブVOLユニットのスリットがVOLUME
MINの位置に合うか?
● ノブSELユニットを取り付ける場合：
a. INPUT（SW501）のカット位置が上になるよう回
します。（Fig.2）
b. ノブSELユニットの止めネジ位置を上にして取
り付けます。（Fig.2）
※ このとき、止めネジは締めません。
c. フロントパネルからノブSELユニットまで0.5〜
0.75mm程度隙間をあけます。（Fig.2）
d. INPUT（SW501）のカット位置に止めネジ位置を
合わせ、止めネジを締めます。（Fig.2）
e. 取り付け後、次の動作を確認します。
・ ノブSELユニットを左右に回し、フロントパ
ネルに擦っていないか?
● ノブTCユニットを取り付ける場合：
※ BASS、TREBLE、BALANCEの取り付け方法
はすべて同じです。
例としてBALANCEの取り付け方法を記載しま
す。
a. BALANCE（VR504）を左右に回し、中央の位置
に合わせます。（Fig.2）
※ 左右に回すと、中央の位置で一度止まりま
す。
b. ノブTCユニットのスリットをBALANCE中央の
位置に合わせ、取り付けます。（Fig.2）
※ このとき、まだ止めネジは締めません。
c. フロントパネルからノブTCユニットまで0.5〜
0.75mm程度隙間をあけます。（Fig.2）
d. ノブTCユニットの止めネジを締めます。（Fig.2）
●When installing the knob VOL unit:
a. Turn the VOLUME (VR501) counterclockwise
fully. (Fig. 2)
b. Match the slit in the knob VOL unit with the
“VOLUME MIN”position and install it in that
state. (Fig. 2)
*At this time, do not tighten the lock set screw.
c. Keep about 0.5 mm to 0.75 mm clearance from
the front panel to knob VOL unit. (Fig. 2)
d. Match the lock set screw position with the cut in
VOLUME (VR501) and tighten the lock set screw.
e. After installation, perform following checks.
•Turn the knob VOL unit both directions to
check that it does not rub against the front
panel.
•Turn the knob VOL unit clockwise fully and
check that the slit in it matches with the
“VOLUME MAX”position.
•Turn the knob VOL unit counterclockwise
fully and check that the slit in it matches with
the “VOLUME MIN”position.
●When installing the knob SEL unit:
a. Turn the INPUT (SW501) so that the cut in it
comes at the top. (Fig. 2)
b. Install the knob SEL unit with its lock set screw
positioned at the top. (Fig. 2)
*At this time, do not tighten the lock set screw.
c. Keep about 0.5 mm to 0.75 mm clearance from
the front panel to knob SEL unit. (Fig. 2)
d. Match the lock set screw position with the cut in
INPUT (SW501) and tighten the lock set screw.
e. After installation, perform following checks.
•Turn the knob SEL unit in both directions to
check that it does not rub against the front
panel.
●When installing the knob TC unit
*Use the same installation procedure for BASS,
TREBLE and BALANCE.
Described here is installation of BALANCE as
an example.
a. Turn the BALANCE (VR504) in both directions
and set it to the center position. (Fig. 2)
*VR504 stops at the center position when it is
turned in both directions.
b. Match the slit in the knob TC unit with the center
position of BALANCE and install it in that state.
(Fig. 2)
*At this time, do not tighten the lock set screw.
c. Keep about 0.5 mm to 0.75 mm clearance from
the front panel to knob TC unit. (Fig. 2)
d. Tighten the lock set screw of the knob TC unit.
(Fig. 2)
Fig. 2
e. 取り付け後、次の動作を確認します。
・ ノブTCユニットを左右に回し、フロントパ
ネルに擦っていないか?
・ ノブTCユニットを左いっぱいに回し、ノブ
TCユニットのスリットがBALANCELの
位置に合うか?
・ ノブTCユニットを右いっぱいに回し、ノブ
TCユニットのスリットがBALANCERの
位置に合うか?
e. After installation, perform following checks.
•Turn the knob TC unit in both directions to
check that it does not rub against the front
panel.
•Turn the knob TC unit counterclockwise
fully and check that the slit in it matches with
the “BALANCE L”position.
•Turn the knob TC unit clockwise fully and
check that the slit in it matches with the
“BALANCE R”position.