(0 to ‑99 dB) ..................................................................0.5 dB or less
■ General / 総合
Power Supply / 電源電圧
U model ....................................................................AC 120 V, 60 Hz
R model ........................................ AC 110–
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
L model ......
J model ................................................................AC 100 V, 50/60 Hz
Power Consumption / 消費電力
[A‑S501]
U,R,A,B,G,Jmodels .......................................................... 240 W
T, L models .............................................................................220 W
[A‑S301]
U,R,K,A,B,G,Jmodels......................................................190 W
T, L models .............................................................................170 W
.................................................. AC 220–240 V
120/220–240 V,
10
/ 24 bit
50/60 Hz
, 50/60 Hz
46
(1-3/4")
240 (9-1/2")
55
(2")
(2-1/8")
Front view
ø 60
335 (13-1/4")50
435 (17-1/8")
25.5
(1")
387 (15-1/4")
341 (13-3/8")
20.5
(3/4")
130 (5-1/8")
151 (5-7/8")
21
(7/8")
Unit: mm (inch)
単位:mm(インチ)
■ INTERNAL VIEW
Top view
13892
Front view
nopq
45 67
kjlm
r
A-S501/A-S301
A-S301A-S501
a
MAIN (8)
b
MAIN (2)
c
FUNCTION (4)
d
MAIN (3) (R model)
e
DIGITAL
f
MAIN (6)
g
FUNCTION (1)
h
FUNCTION (2)
i
FUNCTION (3)
j
MAIN (5)
k
MAIN (1)
l
MAIN (4)
m
POWER TRANSFORMER
n
OPERATION (7)
o
OPERATION (4)
p
OPERATION (3)
q
OPERATION (1)
r
OPERATION (2)
s
OPERATION (6)
t
OPERATION (5)
A-S501/A-S301
st
■ SERVICE PRECAUTIONS / サービス時の注意事項
Safety measures
•Some internal parts in this product contain high
voltages and are dangerous. Be sure to take safety
measures during servicing, such as wearing insulating
gloves.
• Note that the capacitors indicated below are
dangerous even after the power is turned off because
an electric charge remains and a high voltage
continues to exist there.
B
efore starting any repair work, connect a discharging
esistor (5 k‑ohms/10 W) to the terminals of each
r
capacitor indicated below to discharge electricity.
The time required for discharging is about 30 seconds
per each.
C134, C135 on MAIN (1) P.C.B.
For details, refer to “PRINTED CIRCUIT BOARDS:
MAIN (1) P.C.B.”.
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。
• 下記のコンデンサには電源を 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(
ンデンサの端子間に接続して放電してください。
放電所用時間は各々約 30 秒間です。
MAIN(1)P.C.B. の C134、C135
詳しくは “PRINTED CIRCUIT BOARDS:MAIN(1)
P.C.B.” を参照してください。
5 k Ω/10 W)を下記の各コ
11
A-S501/A-S301
■ DISASSEMBLY PROCEDURES / 分解手順
(Remove parts in the order as numbered.)
Disconnect the power cable from the AC outlet.
A-S301A-S501
(番号順に部品を外してください。)
AC 電源コンセントから、電源コードを抜いてください。
1. Removal of Top Cover
a. Remove 4 screws (1), 4 screws (2) and screw (3).
(Fig. 1)
b. Remove the top cover. (Fig. 1)
2. Removal of Front Panel Unit
a. (A‑S501)
A-S501/A-S301
Remove screw ( ④ ), screw ( ⑤ ) and then remove
the top frame.(Fig. 1)
(A‑S301)
Remove screw ( ⑥ ) and then remove the top
support.
b.
Pull out the knobs and cap. (Fig. 1)
(Fig. 1)
c. Remove 7 screws ( ⑦ ). (Fig. 1)
d. Remove the front panel unit. (Fig. 1)
1. トップカバーの外し方
a. 1のネジ 4 本、2のネジ 4 本、3のネジ 1 本を外し
ます。(Fig. 1)
b. トップカバーを取り外します。(Fig. 1)
2. フロントパネルユニットの外し方
a. (A‑S501)
④ のネジ 1 本、⑤ のネジ 1 本を外し、トップフレー
ムを取り外します。(Fig. 1)
(A‑S301)
⑥ のネジ 1 本を外し、トップサポートを取り外しま
す。(Fig. 1)
b. ツマミ、キャップを取り外します。(Fig. 1)
c. ⑦のネジ 7 本を外します。
d. フロントパネルユニットを前方へ取り外します。
• Digital audio pin cable (when COAXIAL jack is used)
• Firmware CD
Download the lates
download sour
r: BD-940/BD-S1065/BD-S1900/BD-S2900/BD-S671
t firmware from the specified
ce and create the firmware CD.
● 必要なツール
・ CD、DVD または BD プレーヤー(DIGITAL
OUTPUT(OPTICAL または COAXIAL)端子付き)
・ 光ファイバーケーブル(OPTICAL 端子使用時)
・
デジタル音声ピンケーブル(COAXIAL 端子使用時)
・ ファームウェア CD
指定のダウンロード先から最新のファームウェア
をダウンロードして、ファームウェア CD を製作
してください。
15
A-S501/A-S301
Power cable
● Connection
Use the optical cable (when OPTICAL jack is used)
or Digital audio pin cable (when COAXIAL jack is
used) to connect the CD, DVD or BD player and the
unit.
● Operation Procedures
1. Set this unit to the firmware update mode.
a. Connect the power cable of this unit to the AC
outlet. (Fig.1)
b. Set the “z” (power) switch to the OFF position.
A-S501/A-S301
(Fig.1)
c. Fully turn the “BALANCE” knob to the rig
ht (R).
(Fig.1)
Fully turn the “VOLUME” knob to the left
d.
(minimum). (Fig.1)
e While pressing the “PURE DIRECT” switch, press
the “z” (power) switch to turn on this unit. (Fig.1)
The unit is set to the firmware update mode.
When this unit is set to the firmware update mode, the
power indicator flashes at a 1‑second interval.
does not change 10 seconds or more after
playback of the firmware CD was started, try
updating the firmware again, starting from the
beginning of the procedure.
Becarefulthatthepowercableisnotunplugged
•
and the power voltage does not drop while the
firmware is being updated. Otherwise, firmware
updating may fail and cannot be performed
again.
3. After the firmware has been updated, all “INPUT”
indicators light up. (Fig. 4)
After checking that all “INPUT” indicators light up,
press the “z” (power) switch to turn it off, then on
again.
“INPUT” インジケーター全ての点灯を確認したら、
“z”(電源)スイッチを OFF から ON にして、もう
一度電源を入れます。
A-S501/A-S301
Note:
If the power indicator flashes at a 0.5‑second
interval or all “INPUT” indicators do not light up after
updating the firmware, try updating the firmware
again, starting from the beginning of the procedure.
(Fig. 5)
These indicate that the data was not correctly
written to the microprocessor. If the same result is
obtained after trying to update the firmware again,
the microprocessor may be damage
Press the “z” (power) switch to turn off the power.
4.
d.
5. Eject the firmware CD from the CD/DVD/BD player.
6. Start up the self‑diagnostic function and check that
the firmware version is the same as written one.
(For details, refer to “Indication of firmware version”.)
This unit has self‑diagnostic functions that provides the
following functions.
• Indication of firmware version
• Indication of “AUTO POWER STANDBY” switch status
• Indication and checking of protection information
• Factory preset
本機には下記の機能をもつダイアグ(自己診断機能)が
あります。
•ファームウェアのバージョン表示“AUTO POWER STANDBY” スイッチの状態表示
•
• プロテクション情報の表示と確認
• ファクトリープリセット
● Starting Self-Diagnostic Function
1. Press the “z” (power) switch to turn off this unit. (Fig. 1)
A-S501/A-S301
2. Connect the power cable of this unit to the AC outlet.
(Fig. 1)
3. Set the “SPEAKERS” knob to the “OFF” position. (Fig. 1)
Note:
Since factory preset is reserved by turning
off this unit when the “SPEAKERS” knob is set
to the “A” position, set the “SPEAKERS” knob
to the “OFF” position before starting the self‑
diagnostic function mode
.
4. Set the “BASS”, “TREBLE” and “BALANCE” knobs to
the top positions. (Fig. 1)
Note:
Be sure to set the “BASS”, “TREBLE” and
“BALANCE” knobs to the top positions. These
positions are stored when the self‑diagnostic
function mode is started, and software corrections
are made to the top position for each selector.
In addition, the self diagnostic function mode
cannot be started if the top positions for the
knobs are off by more than ± 5% of the 2.5 V
input voltage.
5. Set the “LOUDNESS” knob to the “FLAT”
position. (Fig. 1)
6. Press the “z” (power) key to turn on this unit. (Fig. 1)
7. Press the “z” (AMP) key on the remote control to set
this unit to standby. (Fig. 2)
8. Repeat pressing the “PURE DIRECT” key 6 times
within 15 seconds. (Fig. 1)
● Display provided when Self-Diagnostic
Function started
・ Indication of protection information
プロテクション情報の表示
Power indicator
パワーインジケーター
・ Indication of auto power standby status
● Details of Indication
• Indication of firmware version
The firmware version of the microprocessor (IC502
of the FUNCTION P.C.B.) is indicated in the binary
code (BCD) using the “COAXIAL”, “CD”, “TUNER” and
“PHONO” indicators. (Fig. 4)
INPUT indicators / INPUT インジケーター
Binary number (BCD) [Lightup: 1, Off: 0] / 2進数(BCD)
Normal value:2.559 to 3.259V (AD value: 130‑167)
Detection port: PRV (FUNCTION (1) P.C.B. 93 pin of
the microprocessor IC502)
Detected at:ACL, ± 15, +5S
I protection L/Rch
Cause:Excess curre
Speaker ter
nt flow into amplifier.
minal shorted. (*)
Normal value:LOW (0V)
Detection port: PRI (FUNCTION (1) P.C.B. 69 pin
of the microprocessor IC502)
Detected at:PRI (Amplifier output L/Rch of
MAIN (1) P.C.B.)
* If the protection function works due to shortage
at the speaker terminal, the power turns off at the
excess current protection L/Rch.
However, pressing the “z” (power) switch for OFF/
ON, all “IN
power to tur
PUT” indicators flash 5 times and the
n on.
DC voltage protection
Cause:Abnormal DC voltage of amplifier
output.
Normal value:0.947 to 2.517V (AD value: 48‑129)
Detection port: PRD (FUNCTION (1) P.C.B. 89 pin
of the microprocessor IC502)
Detected at:Amplifier output L/Rch of MAIN (1)
P.C.B.
電源電圧プロテクション
原因:電源部の電圧が異常。
正常値:2.559 〜 3.259V (AD 値:130‑167)
検出ポート: PR
原因:ヒートシンクの温度が異常。
正常値:A‑S501:0.20 〜 1.80V (AD 値:10‑91)
検出ポート: THM1(FUNCTION (1) P.C.B. マイコン
検出先:THML(MAIN (4) P.C.B. のヒートシン
ダイオード THM
原因:ダイオード (MAIN (1) の D111)の温度
正常値:0 〜 0.346V (AD 値:0‑18)
検出ポート: THM3(FUNCTION (1) P.C.B. マイコン
検出先:THM 3(FUNCTION (4) P.C.B. の
ロテクション
SB 供給電源の過電流。
P.C.B.:マイコン IC502 の 45ピン)
IC309)
A‑S301:0.20 〜 1.66V (AD 値:10‑85)
IC502 の 84 ピン)
THM2(FUNCTION (1) P.C.B.:マイコ
ン IC502 の 83 ピン)
ク温度検出 Lch IC101)
THMR(MAIN (5) P.C.B. のヒートシン
ク温度検出 Rch I
(温度)プロテクション
が異常。
IC502 の 97 ピン)
TH501、MAIN (1) P.C.B. の D111)
C102)
A-S501/A-S301
• Checking of protection information
Check the following information when a protection
function has been activated.
・ Protection history (up to 4)
・ Position of “VOLUME” knob when the protection
function was activated (*)
・AD value when t
activated
・AD value when the diode THM protection function
was activated
・ Operating information for the speaker relay/
headphones relay
・ AD value for the “BALANCE” knob
・ Input source information
* Since the “VOLUME” knob automatically moves
to the position when the protection function was
activated, do not to operate any other knob while
the “VOLUME” knob is moving.
he protection function was
• プロテクション情報の確認
プロテクションが働いた時の下記の情報を確認します。
・ プロテクションの履歴(4つまで)
・ プロテクションが働いた時の “VOLUME” ツマミの
位置(※)
・ プロテクションが働いた時の AD 値
・ ダイオード THM(温度)プロテクションが働いた
時の AD 値
・ スピーカーリレー/ヘッドホン リレーの動作情報
・ “BALANCE” ツマミの AD 値
・ 入力ソースの情報
※ “VOLUME” ツマミはプロテクションが働いた時の
位置へ自動的に動作するため、動作中にほかのツ
マミを操作しないよう注意してください。
21
A-S501/A-S301
If several protection functions have been activated,
history for up to four of the most recent protection
functions can be viewed by turning the knob indicated
below.
BASS:History for the most recent protection
function
TREBLE:History for the 2nd most recent
protection function
BALANCE:History for the 3rd most recent
protection function
LOUDNESS:History for the 4th most recent
protection function
A-S501/A-S301
* When the “BASS” or “TREBLE” knob is turned to “–” or
the “BALANCE” knob is turned to “L”, the corresponding
protection history will be indicated by the power indicator.
* When the “LOUDNESS” knob is turned to a position halfway
between “FLAT” and “‑30dB”, the 4th most recent protection
history will be indicated.
* When the “BASS”, “TREBLE” and “BALANCE” knobs are set
to their top positions and the “LO
AT”, the most recent protection function (the same as that
“FL
indicated by turning the “BASS” knob) is indicated by the “
(power) indicator. However, the “VOLUME” knob will not move
at this time. The “VOLUME” knob will move if a protection
history is selected with one of the knobs. (Fig. 7)
* The order of priority for indicating the protection history is as
follows:
BASS >
TREBLE > BALANCE > LOUDNESS.
“TREBLE” and “BALANCE” knobs were turned at the
If the
same time, the “TREBLE” knob will have priority, and the 2nd
most recent protection function is indicated.
When the 4th most recent protection function is indicated
プロテクション 最新から4番目の履歴を表示する場合
* When the “LOUDNESS” knob is turned to a
position halfway between “FLAT” and “‑30dB”,
the 4th most recent protection history will be
indicated.
※ “LOUDNESS” ツマミは “FLAT” と “ − 30dB” 間
の中央の位置まで回すことで、4 番目の履歴が
表示されます。
Fig. 7
Note:
When checking the protection history, the “VOLUME”
knob will automatically move to the position when
the protection function was activated. Do not operate
any other knob while the “VOLUME” knob is moving.
Example:
To check the history for the 3rd most recent protection
function, set the “SPEAKERS” knob to “OFF”, the “BASS”
and “TREBLE” knobs to their top positions, the “LOUDNESS”
knob to “FLAT”, and the “BALANCE” knob to “L”. (Fig. 8)
1. AD value when the protection function was activated
At the same time that the protection history is
indicated, the AD value when the protection function
was activate
d is indicated in binary code (
BCD)
using the “INPUT” indicators. (Fig. 9)
BASS:
AD value for the most recent protection function
TREBLE:
AD value for the 2nd most recent protection function
BALANCE:
AD value for the 3rd most recent protection function
LOUDNESS:
AD value for the 4th most recent protection function
* When checking the AD value when the protection
function was activated, the “VOLUME” knob
will automatically move t
pr
otection function was activated. Do not operate
o the position when the
any knob while this knob is moving.
* For functions If protection L/Rch or USB over
current protection or if there is no protection history,
all “INPUT” indicators will be off since there are no
AD values stored.
例:
プロテクション履歴の最新から 3 番目の履歴を確認した
い場合、
ツマミ
“
BALANCE”ツマミを“L”にします。(Fig. 8)
“
SPEAKERS”ツマミは“OFF”、“BASS”、“TREBLE
は中央の位置、“LOUDNESS”ツマミは“FLAT”にし、
Fig. 8
1. プロテクションが働いた時の AD 値
プロテクション履歴の表示と同時にプロテクション
が働いた時の AD 値が “INPUT” インジケーターを使っ
て 2 進数(BCD)で表示されます。(Fig. 9)
BASS:
プロテクション最新の履歴の AD 値
TREBLE:
プロテクション最新から 2 番目の履歴の AD 値
BALANCE:
プロテクション最新から 3 番目の履歴の AD 値
LOUDNESS:
プロテクション最新から 4 番目の履歴の AD 値
※プロテクションが働いた時の AD 値を確認すると同
3. Operating information for the speaker relay/
headphones rela
Turn the
“TREBLE” knob to “+” and the “SPEAKERS” knob
y
to “A”. (Fig. 13)
The ON/OFF states of speaker relays A/B (RY101 and
RY102 on MAIN (1) P.C.B.) and the headphones relay
(RY103 on MAIN (1) P.C.B.) when a protection function
is activated are indicated using the “INPUT” indicators.
(Fig. 13)
Note:
Since factory preset is reserved by turning off this unit
when the “SPEAKERS” knob is set to the “A” posi
be sure to set the
“SPEAKERS” knob to the “OFF”
tion,
position before turning off this unit in case of keeping
setup information stored in the backup memory of the
microprocessor.
z”(電源)スイッチを OFF にし、もう一度 ON
にして電源を入れると、ファクトリープリセット
が実行されます。
A-S501/A-S301
Fig. 18
When factory preset is reserved
ファクトリープリセット予約時
27
A-S501/A-S301
● Canceling Self-Diagnostic Function
To keep setup information stored in the backup
memory of the microprocessor:
Set the “SPEAKERS” knob to the “OFF”, “B” or “A+B” position
and press the “z” (power) key to turn off the power.
Self‑diagnostic function is canceled.
To initialize the backup memory of the
microprocessor and revert the following stored
settings to the factory presets:
A-S501/A-S301
Set the “SPEAKERS” knob to the “A” position, press the
“z” (power) key to turn off the power.
Self‑diagnostic function is canceled with the initialization
reserved.
When the “z” (power) switch is pressed again to turn on
this unit, the backup memory of the microprocessor will
be initialized, and the stored settings will be reverted to
the factory presets.
For details, refer to “Factory Preset” in the section “SELF‑
DIAGN
Using this product with the protection function disabled
may cause further damage to this unit. Use special care
for this point when using this mode.
If the protection function works and causes hindrance to
trouble shoot, cancel the protection function as described
below, and it will be possible to enter the self‑diagnostic
function mode.
(The protection functions other than the excess curre
detect function will be disabled.)
1. Press the “z” (power) switch to turn off this unit. (Fig. 19)
2. Connect the power cable of this unit to the AC outlet.
(Fig.
19
)
3. Set the “SPEAKERS” knob to the “OFF” position. (Fig. 19)
Note:
Since factory preset is reserved by turning
off this unit when the “SPEAKERS” knob is set
to the “A” position, set the “SPEAKERS” knob
to the “OFF” position before startin
diagnostic function mode
4. Set the “BASS”, “TREBLE” and “BALANCE” knobs to
the top positions. (Fig.
Note:
Be sure to set the “BASS”, “TREBLE” and
“BALANCE” knobs to the top positions. These
positions are stored when the self‑diagnostic
function mode is started, and software corrections
are made to the top position for each selector.
In addition, the self diagnostic function mode
cannot be started if the top positions for the
knobs ar
input voltage.
5. Set the “LOUDNESS” knob to the “FLAT” position. (Fig. 19)