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 specifi cally Yamaha Products, are already known
and understood by the users, and have therefore not been restated.
WARNING:
IMPORTANT:
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. Modifi cations are, therefore, inevitable and specifi cations
are subject to change without notice or obligation to retrofi t. Should any discrepancy appear to exist, please contact the distributor's
Service Division.
WARNING:
IMPORTANT:
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 specifi ed. 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.
The presentation or sale of this manual to any individual or fi rm does not constitute authorization, certifi cation or
recognition of any applicable technical capabilities, or establish a principle-agent relationship of any form.
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).
Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power to the unit.
A-S2100
■ CONTENTS
TO SERVICE PERSONNEL ............................................ 2
FRONT PANELS .............................................................3
REPLACEMENT PARTS LIST .............................. 85–112
REMOTE CONTROL ................................................... 113
アンプ調整
............... 41–43
P.O.Box 1, Hamamatsu, Japan
'14.07
A-S2100
■ TO SERVICE PERSONNEL
1. Critical Components Information
Components having special characteristics are marked ⚠ 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 0.15 F.
A-S2100
For U model
WALL
OUTLET
• Leakage current must not exceed 0.5mA.
• Be sure to test for leakage with the AC plug in both polarities.
EQUIPMENT
UNDER TEST
INSULATING
TABLE
AC LEAKAGE
TESTER OR
EQUIVALENT
“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.
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
WHATSOEVER!
Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or
expose eyes to solder/flux vapor!
If you come in contact with solder or components located inside the enclosure of this product, wash your hands before
handling food.
About lead free solder /
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.
(1.5 m) (J model) ......................................................x 1
G .....................European model
L .....................Singapore model
V ..........................Taiwan model
S ......................Brazilian model
J ...................... Japanese model
寸法図
Top view
(2-1/4")
ø 45
25
(1")
Power Supply /
U model ..................................................................AC 120 V, 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
L model ...................................................... AC 220–240 V, 50/60 Hz
V model ................................................................... AC 110 V, 60 Hz
S model ........................................................... AC 110–120 V, 60 Hz
J model .............................................................. AC 100 V, 50/60 Hz
Power Consumption /
U model ......................................................................350 W/500 VA
T, K, A, B, G, V, S, J models .................................................... 350 W
L model ................................................................................... 250 W
Standby Power Consumption (reference data) /
待機時消費電力(参考値)
................................................................................................. 0.3 W
Maximum Power Consumption (1 kHz, 4 ohms, 10 % THD) [V model]
................................................................................................ 700 W
Dimensions (W x H x D) /
............................... 435 x 157 x 463 mm (17-1/8" x 6-1/8" x 18-1/4")
Weight / 質量
............................................................................. 23.4 kg (51.6 lbs.)
電源電圧
消費電力
寸法(幅×高さ×奥行き)
8
317 (12-1/2")
45
55
(1-3/4")
(2-1/8")
Front view
325 (12-3/4")
435 (17-1/8")
418 (16-1/2")
463 (18-1/4")
20
(3/4")
140 (5-1/2")
157 (6-1/8")
17
(5/8")
Unit: mm (inch)
単位:mm(インチ)
■ INTERNAL VIEW
A-S2100
Rear view
534
Top viewSide view
Front view
12
171519182016
8967
111014 1312
1
INPUT (2) P.C.B.
2
INPUT (1) P.C.B.
3
FRONT (17) P.C.B.
4
FUNCTION (2) P.C.B.
5
FRONT (16) P.C.B.
6
FRONT (20) P.C.B.
7
FUNCTION (3) P.C.B.
8
FUNCTION (1) P.C.B.
9
MAIN (3) P.C.B.
10
MAIN (1) P.C.B.
11
POWER TRANSFORMER
12
MAIN (2) P.C.B.
13
FRONT (18) P.C.B.
14
FRONT (19) P.C.B.
15
FRONT (13) P.C.B.
16
FRONT (12) P.C.B.
17
FRONT (1) P.C.B.
18
METER UNIT
19
FRONT (15) P.C.B.
20
FRONT (2) P.C.B.
21
FRONT (3) P.C.B.
22
FRONT (5) P.C.B.
23
FRONT (6) P.C.B.
24
FRONT (4) P.C.B.
25
FRONT (7) P.C.B.
26
FRONT (8) P.C.B.
27
FRONT (9) P.C.B.
28
FRONT (10) P.C.B.
29
FRONT (11) P.C.B.
30
FRONT (14) P.C.B.
A-S2100
27262324223028292125
9
A-S2100
■ SERVICE PRECAUTIONS /
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.
Before starting any repair work, connect a discharging
resistor (5 k-ohms/10 W) to the terminals of each
A-S2100
capacitor indicated below to discharge electricity.
The time required for discharging is about 30 seconds
per each.
C309, C310, C317 to C320, C327 and C328
on MAIN (3) P.C.B.
For details, refer to “PRINTED CIRCUIT BOARDS”.
Precaution for handling measuring instrument
Since the speaker output of this unit is BALANCED OUT
connected, the ground side of the measuring instrument
to be connected to the speaker terminal MUST be kept in
floating condition.
a. Remove 4 screws (⑤). (Fig. 2)
b. Remove the top frame. (Fig. 2)
c. Remove 8 screws (⑥). (Fig. 2)
d. Remove CB401, CB403, CB405 and CB406. (Fig. 2)
e. Remove the front panel unit. (Fig. 2)
Do not tighten the fixing screw of the VOLUME knob at the cut
position of the VOLUME (VR401). If the screw is tightened there,
the slit in the VOLUME knob will not align with VOLUME MAX.
and VOLUME MIN. positions
します。(Fig.11)
c. ㉘のネジ 2 本を外し、P.C.B. サポート L を外します。
(Fig.11)
d. ㉙のネジ 2 本を外し、P.C.B. サポート R を外します。
(Fig.11)
e. FUNCTION(2)P.C.B. を外します。(Fig.11)
Rear panel
リアパ ネ ル
㉗
㉔
㉒
㉖
INPUT (2) P.C.B.
CB34
CB33
CB901
㉖
㉔
㉒
CB31
INPUT (1) P.C.B.
Barrier
バリア
Shield case
シールドケース
㉗
㉘
㉓
㉑
㉓
㉕
㉙
20
P.C.B. Support L
P.C.B. サポート L
FUNCTION (2) P.C.B.
P.C.B. Support R
P.C.B. サポート R
Fig. 11
A-S2100
When checking the FUNCTION (1) P.C.B.:
• Put the rubber sheet and cloth over this unit, and
place the FUNCTION (1) P.C.B. on them. (Fig. 12)
• Connect ST711 on FUNCTION (1) P.C.B. to the
chassis with a ground lead. (Fig. 12)
• When connecting the flexible flat cable, be careful
with polarity.
FUNCTION (1) P.C.B.
FUNCTION(1)P.C.B.をチェックする場合には:
・ 本機の上にゴムシートと布を敷き、その上に
FUNCTION(1)P.C.B.を置きます。(Fig.12)
・ FUNCTION(1)P.C.B.の ST711 のアースをリード線
でシャーシに接続してください。(Fig.12)
・ フラットケーブルを接続する際、極性に注意してく
ださい。
A-S2100
Rubber sheet and cloth
ゴムシートと布
Fig. 12
Chassis
シャーシ
ST711
Ground lead
アース線
21
A-S2100
When checking the P.C.B.:
a. Remove the top cover. (Fig. 1)
b. Remove the FUNCTION (1) P.C.B. (Fig. 9, 10)
c. Remove 3 screws (⑲). (Fig. 9)
d. Remove 1 screw (㉚), 2 screws (㉛) and 2 screws
(㉜). (Fig. 13)
e. Place the P.C.B.s (with rear panel) upright. (Fig. 14)
f. Connect the rear panel and FUNCTION (3) P.C.B.
a. Remove 3 screws (㉝) and 5 screws (㉞). (Fig. 15)
b. Remove CB410 and CB411. (Fig. 15)
c. Remove the sub-front panel unit. (Fig. 15)
d. Remove the meter unit. (Fig. 15)
* The meter unit is installed in such way that it is
attached to the front panel with the double coated
adhesive tape and pushed by the sub-front panel
from behind.
* The cable is not included in the meter unit package.
When replacing the meter unit, remove the cable from
the old meter unit and re-use it for the new meter unit.
As COM5 or higher port cannot be used,
select out of COM 1 to 4 of the setting on
the PC side.
Fig. 3
Select Internal flash memory
Internalflashmemory を選択します
Select the port of RS-232C
接続している RS-232C ポートを選択します
26
A-S2100
5. Click [Refer...] and select the firmware name.
(Fig. 4)
* The ID and MCU Type are loaded automatically
when the file is selected. (Fig. 4)
Click [OK]. (Fig. 4)
When [Refer...] is clicked, the “Open” screen appears
[Refer...]をクリックすると「ファイルを開く」が表示されます
5.[Refer...]をクリックし、書き込むファームウェア
を選択します。(Fig.4)
※ ID、および MCUType は書き込みファイル選
択後、自動的に取り込まれます。(Fig.4)
[OK]をクリックします。(Fig.4)
A-S2100
6. Click [Setting], and set the baud rate. (Fig. 5)
Fig. 4
6.[Setting]をクリックし、通信速度の設定を行い
ます。(Fig.5)
115200
40
Fig. 5
27
A-S2100
7. Click [E.P.R.], then the “Erase” screen appears.
(Fig. 6)
8. Click [OK] to start writing. (Fig. 6)
7.[E.P.R]をクリックすると、「Erase」が表示されま
す。(Fig.6)
8.[OK]をクリックして書き込みを開始します。
(Fig.6)
Writing being executed.
書き込み中
A-S2100
Fig. 6
9. When writing of the firmware is completed, the
screen appears as shown below. (Fig. 7)
Click [OK]. (Fig. 7)
10. Click [Exit] to end FlashSta.exe. (Fig. 7)
9. ファームウェアの書き込みが完了すると、以下の
画面が表示されます。(Fig.7)
[OK]をクリックします。(Fig.7)
10.[Exit]をクリックして FlashSta.exe を終了します。
(Fig.7)
28
11. Disconnect the power cable of this unit from the
AC outlet.
12. Remove the RS-232C conversion adaptor and
flexible flat cable from the writing port (CB511 on
FUNCTION (1) P.C.B.) of this unit.
13. Connect the power cable of this unit to the AC
outlet, start up the self-diagnostic function and
check that the firmware version is the same as
written one. (For details, refer to “Confirmation of
firmware version”)
13.本機の電源コードを AC コンセントに接続してダ
イアグを起動し、ファームウェアバージョンが書
き込まれたものと同じであることをチェックしま
す。(詳細は “ファームウェアのバージョンの確認”
を参照してください。)
A-S2100
■ SELF-DIAGNOSTIC FUNCTION /
This unit has self-diagnostic functions that are intended
for inspection, measurement and location of faulty point.
There are 11 menu items.
Listed in the table below are self-diagnostic function menu
items.
Note: Some of the menu items listed below may not apply
to the models covered in this service manual.
NO.MENU
1MAIN VERSION
2BOOT VERSION
3FIRMWARE UPDATE
(Not for service /
サービスでは使用しません
4BACKUP INITIALIZE
5ALL MUTE CHECK
● Starting Self-Diagnostic Function
Turn the BALANCE knob unit, TREBLE knob unit and BASS
knob unit clockwise fully and then while pressing down the
“AUDIO MUTE” switch, set the “STANDBY/ON, OFF” (U, K,
A, B, G, L, V, S models) / “
the “ON” position.
The self-diagnostic function mode is activated.
* When the self-diagnostic function mode is selected,
illuminance of the indicator in the meter section is 30%
(dim), thereby you know that the self-diagnostic function
is at work.
If the protection function works and causes hindrance
to troubleshooting, cancel the protection function by the
procedure below, and it will be possible to enter the selfdiagnostic function mode.
Turn the BALANCE knob unit, TREBLE knob unit and BASS
knob unit clockwise fully and then while pressing down the
AUDIO MUTE switch, set the “STANDBY/ON, OFF” (U, K, A,
B, G, L, V, S models) / “
A-S2100
“ON” position and keep pressing down the AUDIO MUTE
switch for 3 seconds or longer.
” (Power) (T model) switch to the
The STANDBY/ON indicator lights up and the power supply
relay (RY1 and RY2 on FUNCTION (1) P.C.B.) turns on.
CAUTION!
Using this unit with the protection function disabled may
cause further damage to this unit. Use special care for
this point when using this mode.
When the protection function works due to an I protection
L/Rch, it is not possible to start this unit with the protection
function cancelled.