Yamaha XP1000 User manual

SERVICE MANUAL
PA 011814 XP1000: 200512-134400
XP2500: 200512-176400
XP3500: 200512-207900
Copyright (c) Yamaha Corporation. All rights reserved. M ’06.02I
■ CONTENTS（目次）
SPECIFICATION（総合仕様）........................................................... 3
DIMENSIONS（寸法図）................................................................... 5
PERFORMANCE GRAPHS（特性図）............................................ 5
PANEL LAYOUT（パネルレイアウト）.............................................. 6
CIRCUIT BOARD LAYOUT（ユニットアウト）............................... 7
WIRING（結線図）.............................................................................. 9
DISASSEMBLY PROCEDURE（分解手順）................................. 10
IC BLOCK DIAGRAM（ICブロック図）......................................... 16
CIRCUIT BOARDS（シート基板図）.............................................. 16
INSPECTIONS（検査）............................................................. 26/31
BLOCK DIAGRAM（ブロックダイアグラム）
OVERALL CIRCUIT DIAGRAM（総回路図）
PARTS LIST
POWER AMPLIFIER
・XP1000
・XP2500
・XP3500

XP1000/XP2500/XP3500
2
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 all 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
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 part 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-
SOEVER!
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.
This applies only to products distributed by Yamaha-Kemble Music (U.K.) Ltd.

3
XP1000/XP2500/XP3500
■ SPECIFICATIONS（総合仕様）
XP3500 120V(U,T) 240V(A)
Output Power 1 kHz
THD+N= 1 % 8 Ω/STEREO
MIN
390 W+390 W 390 W+390 W 390 W+390 W
4 Ω/STEREO 590 W+590 W 590 W+590 W 590 W+590 W
8 Ω/BRIDGED 1180 W 1180 W 1180 W
20 –20 kHz
THD+N= 0.1 % 8 Ω/STEREO 350 W+350 W 350 W+350 W 350 W+350 W
4 Ω/STEREO 450 W+450 W 435 W+435 W 450 W+450 W
8 Ω/BRIDGED 900 W 870 W 900 W
100 V/BRIDGED RL=16 Ω625 W 625 W 625 W
1 kHz
20mS nonclip 2 Ω/STEREO 1000 W+1000 W 925 W+925 W 1000 W+1000 W
4 Ω/BRIDGED 2000 W 1850 W 2000 W
SN Ratio 20Hz-20kHz (DIN AUDIO) MIN 102 dB
Power
Consumption Standby / idle 5 W / 30 W
1/8 (4 Ω/Pink noise) 450 W 450 W 450 W
XP2500 120V(U,T) 240V(A)
Output Power 1 kHz
THD+N= 1 % 8 Ω/STEREO
MIN
275 W+275 W 275 W+275 W 275 W+275 W
4 Ω/STEREO 390 W+390 W 390 W+390 W 390 W+390 W
8 Ω/BRIDGED 780 W 780 W 780 W
20 –20 kHz
THD+N= 0.1 % 8 Ω/STEREO 250 W+250 W 250 W+250 W 250 W+250 W
4 Ω/STEREO 300 W+300 W 295 W+295 W 300 W+300 W
8 Ω/BRIDGED 600 W 590 W 600 W
1 kHz
20mS nonclip 2 Ω/STEREO 650 W+650 W 650 W+650 W 650 W+650 W
4 Ω/BRIDGED 1300 W 1300 W 1300 W
SN Ratio 20Hz-20kHz (DIN AUDIO) MIN 100 dB
Power
Consumption Standby / idle 5 W / 25 W
1/8 (4 Ω/Pink noise) 320 W 320 W 320 W
XP1000 120V(U,T) 240V(A)
Output Power 1 kHz
THD+N= 1 % 8 Ω/STEREO
MIN
135 W+135 W 125 W+125 W 120 W+120 W
4 Ω/STEREO 165 W+165 W 155 W+155 W 155 W+155 W
8 Ω/BRIDGED 330 W 310 W 310 W
20 –20 kHz
THD+N= 0.1 % 8 Ω/STEREO 110 W+110 W 100 W+100 W 100 W+100 W
4 Ω/STEREO 125 W+125 W 115 W+115 W 110 W+110 W
8 Ω/BRIDGED 250 W 230 W 220 W
1 kHz
20mS nonclip 2 Ω/STEREO 250 W+250 W 250 W+250 W 250 W+250 W
4 Ω/BRIDGED 500 W 500 W 500 W
SN Ratio 20 Hz-20 kHz (DIN AUDIO) MIN 96 dB
Power
Consumption Standby / idle 5 W / 20 W
1/8 (4 Ω/Pink noise) 170 W
100V(J)
390 W+390 W
590 W+590 W
1180 W
350 W+350 W
450 W+450 W
900 W
625 W
1000 W+1000 W
2000 W
450 W
100V(J)
275 W+275 W
390 W+390 W
780 W
250 W+250 W
300 W+300 W
600 W
650 W+650 W
1300 W
320 W
100V(J)
110 W+110 W
120 W+120 W
240 W
100 W+100 W
100 W+100 W
200 W
250 W+250 W
500 W
150 W 170 W 170 W
All Models
Power Bandwidth Half Power, THD+N= 0.5 % MIN 10 Hz-40 kHz
THD+N 20 Hz–20 kHz, Half Power MAX 0.1 %
Intermoduration Distortion 60 Hz:7 kHz, 4:1, Half Power MAX 0.1 %
Frequency Response RL=8 Ω, Po=1 W, HPF=OFF
20 Hz-50 kHz MAX 0 dB
TYP 0 dB
MIN -1 dB
Channel Separation Half Power, RL=8Ω, 1 kHz,
Att. max, input 600 Ωshunt MIN 70 dB
Residual Noise 20 Hz–20 kHz, Att. min,
(DIN AUDIO) MAX -70 dBu
Damping Factor RL=8 Ω, 1 kHz MIN 200
Voltage Gain Att. max TYP Selectable from 32 dB or 26 dB (or +4 dBu input sensitivity) by select switch
Input Sensitivity (dBu) Att. max, Rated Power 8 ΩXP3500 XP2500 XP1000
Switch Position +4 dBu +4 +4 +4
26 dB +10.7 +9.2 +5.2
36 dB +4.7 +3.2 -0.8
Maximum Input Voltage MIN +22 dBu
Input Impedance TYP 20 kΩ(balanced), 10 kΩ(unbalanced)
Controls Front Panel POWER switch (push on/push off)
attenuator (31 position) x 2
Rear Panel MODE switch (STEREO/BRIDGED/PARALLEL) x 1
HPF switch (20 Hz/55 Hz/OFF 12 dB/oct) x 2
GAIN SELECT switch (32 dB/26 dB/+4 dBu) x 1
230V(H,B,K,O)
230V(H,B,K,O)
230V(H,B,K,O)

XP1000/XP2500/XP3500
4
0 dBu=0.775 Vrms, Half Power=1/2 Output Power (3 dB below rated power)
All Models
Connectors Input XLR-3-31 type/ch, Euroblock connector (balanced) /ch
Output SPEAKON/ch, 5 way binding post x 1
MONITOR/REMOTE Dsub 15 P x 1
Indicators POWER/STANDBY x 1 (Green/Orange)
SIGNAL x 2 (Green)
CLIP/LIMIT x 2 (Red)
PROTECTION/TEMP x 1 (Red)
x 1 (Red) heatsink temp ≥85 °C
Load Protection POWER switch on/off mute
DC-fault:
output relay off/restored automatically.
Clip limiting : THD ≥0.5 %
Amplifier Protection Thermal:
Cuts the output (heatsink temp ≥90 °C) ; operation not restored automatically.
VI limiter (RL ≤1 Ω): Limit the output.
Power Supply Protection Thermal:
Power supply shutdown (transfomer temp ≥130 °C) ;restored automatically.
Cooling Variable-speed fan: x 1
Fan stop at heatsink temp < 55 °C
Power Requirements UC: 120 V/60 Hz
HB: 230 V/50 Hz
A: 240 V/50 Hz
J: 100 V 50/60 Hz
Dimensions (W x H x D) 480 x 88 x 456 mm
Weight XP3500
15 kg XP2500 14 kg XP1000 12 kg
Included Accessories Security cover (with a hex wrench), Owner’s Manual
■ MONITOR/REMOTE（接続ピン出力）
Pin No. Signal Description
1 GND
2 REMOTE CONTROL STANDBY STANDBY Control: Supply 5VDC, 5 mADC
3 MONITOR MODEL ID XP3500: 1.5 kΩ, XP2500: 1.8 kΩ, XP1000: 2.2 kΩ(Impedance to GND)
4 REMOTE CONTROL NC
NC
5
6 MUTE CH B MUTE Control: Connect to GND, +5 V, 1 mA
7 MUTE CH A
8 MONITOR NC
NC9
10 PROTECT STATUS CH B PROTECTION Off/ Output On: +5VDC, Zo=270
PROTECTION On/ Output Off: 0VDC, Zo=High
11 PROTECT STATUS CH A
12 NC
13 NC
14 OUTPUT LEVEL CH B XP3500, XP2500, XP1000
+4dBu (-27.2 dB of Speaker Output Level) at 100W/8 , RL=7.5 k , Zo=300
15 OUTPUT LEVEL CH A

5
XP1000/XP2500/XP3500
■ DIMENSIONS（寸法図）
XP3500
XP2500
XP1000
Mode:STEREO
Both ch Driven
RL=4 , f=1 kHz
Power Consumption [W]
Output Power [W]
1
10
100
10000
1000
1 10 100 1000
Mode:STEREO
Both ch Driven
RL=4 , f=1 kHz
Power Consumption [W]
Output Power [W]
1
10
100
10000
1000
1 10 100 1000
Mode:STEREO
Both ch Driven
RL=4 , f=1 kHz
Power Consumption [W]
Output Power [W]
1
10
100
1000
1 10 100 1000

Unit: mm
88 456
480
362 3030
5.5
374.5 30
46
■ PERFORMANCE GRAPHS（特性図）

XP1000/XP2500/XP3500
6
■ PANEL LAYOUT（パネルレイアウト）
q POWER switch and indicator
w TEMP indicator
e PROTECTION indicator
r CLIP indicator
t SIGNAL indicator
y Volume control knobs
u Air intakes
*The illustration shows model XP3500.
wr
POWERスイッチ/インジケーター
TEMPインジケーター
PROTECTIONインジケーター
CLIPインジケーター
SIGNALインジケーター
ボリューム
q
w
e
r
t
y
u
q
w
e
r
t
y
u
i
q
w
e
r
t
y
u
i
吸気口
*イラストはXP3500モデルです。
qyeu ut
XLR inputs connectors
Euroblock connectors
HPF switches
GAIN switch
MODE switch
MONITOR/REMOTE terminals
SPEAKERS terminals
GND terminal
i
te
r
u
u
y
qw
XLR入力端子
ユーロブロックコネクター入力端子
HPFスイッチ
GAINスイッチ
MODEスイッチ
MONITOR/REMOTE端子
SPEAKERS端子
アース用ネジ
FrontPanel（フロントパネル）
RearPanel（リアパネル）

7
XP1000/XP2500/XP3500
DC
Powertransformer
(電源トランス)
PAunit
（PAユニット）
DCfan（DCファン）
Cordholder(V3272800)
（インシュロックタイ）
Cordholder(V3272800
)
（インシュロックタイ
）
WholeWiringDrawing（全体の結線図）
DC IN
VR
LED
PSW
PAL
IO1/4
IO2/4
IO3/4
IO4/4
A
B
C
Cordholder(V3272800)
（インシュロックタイ）
Seepage8
（8ページ参照）
Seepage8
（8ページ参照）
Seepage8
（8ページ参照）
■ CIRCUIT BOARD LAYOUT（ユニットレイアウト）

XP1000/XP2500/XP3500
8
Bundlebycordholder.
（インシュロックタイで束ねます。
）
(WD359600,WF873000,Fanwiring)
Bundlebycordholder.（インシュロックタイで束ねます。）
(WF443300,WD361100,WD361700,WD359600,WD362300)
*LocateWD362300asfarfromIO1/4circuitboardaspossible.
（WD362300はできるだけIO1/4シートから離してください。）
Bundlebycordholder.
（インシュロックタイで束ねます。
）
(WF443300,WD361100,WD361700
,
WD359600,WD362400)
*LocateWD362400asfarfrom
WD362300aspossible.
（WD362400はできるだけWD36230
0
から離してください。）
Bundlebycordholder.
（インシュロックタイで束ねます。
）
(WF443300,WD361100,WD361700
,
WD359600,WF361900,WD362000
,
WD362100)
Needtwistof3rotationsormore.
（3回以上ねじります。）
(WD361900,WD362000,WD362100)
Needtwistof3rotationsormore.
（3回以上ねじります。）
(WD360600(W307,308),WD360700)
*InstallW308toXP3500only.
（W308はXP3500のみに実装）
Needtwistof5rotationsormore.
（5回以上ねじります。）
(Transformerwiring)
WG003400 WD359600
Bundlebycordholder.
（インシュロックタイで束ねます。
）
Needpassaholeofcircuitboard.
（シートの穴に通します。）
(WD359600,WD361700)
Bundlebycordholder.（インシュロックタイで束ねます。）
Needpassaholeofcircuitboard.（シートの穴に通します。）
(WD443300,WD361100)
Detail Drawing A（A部詳細）
Detail Drawing C（C部詳細）
Detail Drawing B（B部詳細）
Bundlebycordholder.
（インシュロックタイ
で束ねます。）
(Transformerwiring)
(WD360600(W307,308),
WD360700,Transformerlead)
*InstallW308toXP3500only.
（W308はXP3500のみに実装）

9
XP1000/XP2500/XP3500
G
TM PR
ACL
ASIG
BCL
BSIG
1 2
3 4 5 6 7 8
9
10
PO
+24V
SBY
G
FAN-
1 2
PRH1 PRH2 PRE2
ARY
BRY ASIG
BSIG
1 2
3 4 5 6 7 8
9
10
PRE1
A+
11 12 13 14 15
A- A
B+
B- B G
W307
GRAY
W309
VIOLET
W308
GRAY
XP3500 only
CN103
BLACK
G
CN102
RED
+B
CN104
WHITE
-B
CN105
ORANGE
OUT A
CN106
YELLOW
OUT B
NC AS G BS G +15V G -15V
1 2 3 4 5 6 7
8
PRH1
PRH2
PRE2
ARY
BRY
ASIG
BSIG
1
2
3
4
5
6
7
8
9
10
PRE1
A+
11
12
13
14
15
A-
A
B+
B-
B
G
G
SB
AMUTE
BPS
APS
1
2
3
4
5
6
BMUTE
G
CHA
G
1 2
3 4
CHB
W303B
SDN4P
W403
WHITE
-B
W402
BLACK
G
W401
RED
+B
CN412
BLACK
G
CN410
VIOLET
CN409
ORANGE
CN411
ORANGE
〜24
GND
1
2
3
〜24
CN404
BLACK
BROWN
CN408
BLACK
CN405
WHITE
BLUE
CN407
YELLOW BLUE
BROWN RED
CN403
VIOLET
CN401
GRAY
CN402
GRAY
CN406
YELLOW BLUE
BROWN RED
XP3500 only
ACIN
NL
CN501
PH8P
CN414
PH15P
CN415
PH2P
CN416
PH10P
CN413
VH3P
CN101
PH15P
A2 NC B1 B2 B3
CN303
PH7P W310
SAN10P
G
CHA
G
1 2
3 4
CHB
W306
YELLOW
OUT B
W304
ORANGE
OUT A
W303A
SDN4P
CN304
PH6P W301B
BLACK
GW305
BLACK
G
G
SB
AMUTE
BPS
APS
1
2 3 4 5 6
BMUTE
NC
AS
G
BS
G
+15V
G
-15V
1
2
3
4
5
6
7
8
CN302
PH8P
1
2
3 4 5 6G
-
+
G
-
+
G
-
+
G
-
+1
2
3 4 5 6
CN301
PH7P
W302B
W302A
W301A
BLACK
G
CN441
PH6P
A1 A3
1 2 3 4 5 6 7
A1
B3
B2
B1
NC
A3
A2
1
2
3
4
5
6
7
G
TM
PR
ACL
ASIG
BCL
BSIG
1
2
3
4
5
6
7
8
9
10
PO
+24V
SBY
q
q
No. REF. No. Part No. Destination
WF444600 Connector Assembly HARNESS
w
e
r
t
y
u
i
o
!0
!1
!2
!3
u
y
t
r
e
w
WD359800 B&B
WG003400 C&C
WF443300 C&C
WD361700 C&C
WF873000 B&C
WD359600 ATT
WD361200
WD361100
OUT
B&C
WD362400 B&C
WD362300 B&C
!2
!3
!3
WD360700 B&C
WD360600 B&C
IO1/4-W302B
IO1/4-W301A
IO1/4-CN302
DC-CN441
DC-CN414
DC-CN416
IO1/4-CN301
IO3/4-W303A
DC-CN412
PAL-CN106
PAL-CN105
DC-CN403
DC-CN401
IO2/4-W302A
IO3/4-W301B
DC-CN501
IO3/4-CN304
PAL-CN101
LED-W310
VR-CN303
IO4/4-W303B
IO3/4-W305
IO3/4-W306
IO3/4-W304
PSW-W309
PSW-W307
W302
W301
290
480
470
W310
200
W303
W305
W306
W304
W309
W307
100L
320L
320L
150L
8P
6P
15P
10P
350L
270L
270L
300L
330L
!5
!6
!4
i
o
!0
!1
FG
Except J destination
Except J destination
J destination only
DC
VR
LED
PSW
PAL
IO 1/4
IO 2/4
IO 3/4 IO 4/4
TRANS
!4
!5
!6
WD360600 B&C
WD361900
WD362000
WD362100
DC-CN402*1*1
DC-W401
DC-W402
DC-W403
PSW-W308*1
PAL-CN102
PAL-CN103
PAL-CN104
W308
W401
W402
W403
B&C
B&C
B&C
330L
280L
250L
220L
FAN
■ WIRING（結線図）

XP1000/XP2500/XP3500
10
■ DISASSEMBLY PROCEDURE（分解手順）
Top view
1. Top Cover (Time Required: about 2 min)
1-1 Remove the eleven (11) screws marked [510]. The
top cover can then be removed. (Fig. 1)
1. トップカバー（所要時間:約2分）
1-1. [510]のネジ11本を外して、トップカバーを外

 します。（Fig.1）
2. DC Circuit Board
(Time Required: about 4 min)
2-1 Remove the top cover. (See procedure 1.)
2-2 Remove the nine (9) screws marked [90] and the
screw marked [100]. the DC circuit board can then
be removed with the diode stack. (Fig. 2)
2-3 Remove the diode stack (D401) soldered to the DC
circuit board. (Fig. 2)
* The diode stack is not part of the DC circuit board.
When you replace the DC circuit board, you should
remove the diode stack from the DC circuit board.
3. Power Transformer
(Time Required: about 2 min)
3-1
Remove the top cover. (See procedure 1.)
3-2 Remove the hexagonal nut marked [A], the washer
marked [B] and the washer marked [C]. The power
transformer can the be removed. (Fig. 2)
4.
IO 1/4 Circuit Board and IO 2/4 Circuit Board
(Time Required: about 4 min)
4-1
Remove the top cover. (See procedure 1.)
4-2 Remove the four (4) screws marked [310], the two
(2) screws marked [330] and the two (2) screws
marked [300]. The IO 1/4 circuit board and IO 2/4
circuit board can then be removed. (Fig. 2, 3)
* IO 1/4 circuit board and IO 2/4 circuit board are not
supplied singly. To replace these circuit boards, take
out the corresponding ones from the following sets
of circuit board.
For XP3500: IO35 set of circuit boards (WF399800)
For XP2500: IO25 set of circuit boards (WF399900)
For XP1000: IO10 set of circuit boards (WF400000)
2. DCシート（所要時間:約4分）
2-1. トップカバーを外します。（1項参照）

2-2. [90]のネジ9本と[100]のネジ1本を外して、ダイ

 オードスタックと共にDCシートを外します。

 (Fig.2)
2-3. DCシートに半田付けされているダイオード
 スタック(D401)を外します。(Fig.2)
※ ダイオードスタックは、DCシートの構成部
 品ではありません。DCシートを交換する際
 は、DCシートからダイオードスタックを取
 り外して、新しいDCシートに取り付けてく
 ださい。
3. 電源トランス（所要時間:約2分）
3-1. トップカバーを外します。（1項参照）
3-2. [A]の六角ナット1個を外し、[B]のバネ座金

1個と[C]の平座金1枚を外して、電源トランス

 を外します。(Fig.2)

4.
IO1/4シートとIO2/4シート（所要時間:約4分）

4-1. トップカバーを外します。（1項参照） 
4-2. [310]のネジ4本と[330]のネジ2本を外します。

[300]のネジ2本を外して、IO1/4シートとIO

 2/4シートを外します。(Fig.2,3)
※ IO1/4シートとIO2/4シート単体はサービス

 部品ではありません。シートを交換する場合は

 下記のシートから取り出して使用してください。

 XP3500の場合:IO35シート(WF399800)
 XP2500の場合:IO25シート(WF399900)
 XP1000の場合:IO10シート(WF400000)
[510]: Bind Head Tapping Screw-B 4.0x8 MFZN2B3 (WE962000) Bタイト＋BIND
[530]: Bind Head Tapping Screw-S 3.0x6 MFZN2B3 (WE877800) Sタイト＋BIND
(Fig. 1)
[510]
[510][510]
[510]
TopCover（トップカバー）
Speakerterminalcover
（SPターミナルカバー）
[530] x2

11
XP1000/XP2500/XP3500
[90]: Bind Head Tapping Screw-S 3.0x6 MFZN2W3 (WE877900) Sタイト＋BIND
[100]: Bind Head Tapping Screw-S 3.0x8 MFZN2W3 (WE972100) Sタイト＋BIND
[330]: Bind Head Tapping Screw-S 3.0x6 MFZN2W3 (WE877900) Sタイト＋BIND
[P40]: Bind Head Tapping Screw-S 3.0x6 MFZN2W3 (WE877900) Sタイト＋BIND
5. IO 3/4 Circuit Board and IO 4/4 Circuit Board
(Time Required: about 4 min)
5-1 Remove the top cover. (See procedure 1.)
5-2
Remove the two (2) screws marked [530]. the speaker
terminal cover can then be removed. (Fig. 1)
5-3 Remove the four (4) screws marked [350], the two
(2) hexagonal locking screws marked [360] and the
two
(2) screws marked [340]. The IO 3/4 circuit board
and IO 4/4 circuit board can then be removed. (Fig. 2)
* IO 3/4 circuit board and IO 4/4 circuit board are not
supplied singly. To replace these circuit boards, take
out the corresponding ones from the following sets
of circuit board.
For XP3500: IO35 set of circuit boards (WF399800)
For XP2500: IO25 set of circuit boards (WF399900)
For XP1000: IO10 set of circuit boards (WF400000)
5. IO3/4シートとIO4/4シート（所要時間:約4分）
5-1. トップカバーを外します。（1項参照）
5-2.
[530]のネジ2本を外して、SPターミナルカバー

 を外します。(Fig.1)
5-3.
[350]のネジ4本と[360]の六角ロックネジ2本を

 外します。
[340]のネジ2本を外して、IO3/4シートとIO

 4/4シートを外します。(Fig.2)
※ IO3/4シートとIO4/4シート単体はサービス

 部品ではありません。シートを交換する場合は

 下記のシートから取り出して使用してください。

 XP3500の場合:IO35シート(WF399800)
 XP2500の場合:IO25シート(WF399900)
 XP1000の場合:IO10シート(WF400000)
DC
Powertransformer
(電源トランス)
PAunit
（PAユニット）

Diodestack
(ダイオードスタック)
PAL
IO1/4
IO3/4 IO4/4
(Fig. 2)
IO2/4
[100]
[330]
[A],[B],[C]
[P40]
[P40]
[90]
[90]
Top View

XP1000/XP2500/XP3500
12
Front view
Top view Bottom view
Rear Panel
[300]: Pan Head Screw 2.6x6 MFZN2B3 (WE986400) 小ネジ＋PAN
[310]: Bonding Tapping Screw-B 3.0x10 MFZN2B3 (WE878000) Bタイト＋BIND
[340]: Bonding Tapping Screw-B 3.0x10 MFZN2B3 (WE878000) Bタイト＋BIND
[350]: Flat Head Tapping Screw-B 3.0x8 MFZN2B3 (WF266800) Bタイト＋FLAT
[360]: Hex. Locking Screw HFS-4S-B1W (V6706600) 六角ロックネジ
(Fig. 3)
[350][360]
[310][300] [340][310]
IO4/4
IO1/4 IO3/4
IO4/4
6. Front Panel Assembly
(Time Required: about 4 min)
6-1
Remove the top cover. (See procedure 1.)
6-2 Remove the two (2) cord holders and disconnect the
connector from the DC circuit board. (Photo.1,2)
6-3
Remove the six (6) screws marked [440] and six (6)
screws marked [460]. The front panel assembly can
then be
removed with the left and right rack angle.
(Photo. 3, 7)(Fig. 4, 5)
6. フロントパネルAss'y（所要時間:約4分）
6-1. トップカバーを外します。（1項参照）

6-2. インシュロックタイ2箇所を外して、DCシー

 トからコネクターを抜きます。(Photo.1,2)
6-3.
[440]のネジ6本と[460]のネジ6本を外し、左右

 のラックアングルと共にフロントパネルAss'y

 を外します。(Photo.3,7)(Fig.4,5)
[460]: Bind Head Screw-S 4.0x10 MFZN2B3 (WE980400) 小ネジ＋BIND
(Fig. 4)
[440]: Bind Head Screw-B 4.0x8 MFZN2B3 (WE962000) 小ネジ＋BIND
(Photo. 3)
(Photo. 1) (Photo. 2)
Rackangle（ラックアングル）
[460][460]
Rackangle（ラックアングル
）
Cordholder
（インシュロックタイ） Cordholder （インシュロックタイ）
VR
DC DC
[440][440]

13
XP1000/XP2500/XP3500
7. VR Circuit Board
(Time Required: about 4 min)
7-1
Remove the top cover. (See procedure 1.)
7-2 Remove the front panel assembly. (See procedure 6.)
7-3 Remove the two (2) attenuation knobs and the two
(2) hexagonal nuts marked [D]. The VR circuit
board can then be removed. (Photo. 4)
8. DC Fan (Time Required: about 4 min)
8-1
Remove the top cover. (See procedure 1.)
8-2 Remove the front panel assembly. (See procedure 6.)
8-3 Remove the two (2) screws marked [170] and the two
(2) hexgonal nat. The DC fan can then be removed.
(Photo. 5)
* Removal of VR circuit board facilitates the work.
9.
LED Circuit Board (Time Required: about 4 min)
9-1 Remove the top cover. (See procedure 1.)
9-2 Remove the front panel assembly. (See procedure 6.)
9-3 Remove the two (2) screws marked [270]. The LED
circuit board
can then be removed. (Photo. 6)
7.
VRシート （所要時間:約4分）
7-1. トップカバーを外します。（1項参照）

7-2. フロントパネルAss'yを外します。（6項参照）

7-3. アッテネーターノブ2個と[D]の六角ナット2個

 を外して、VRシートを外します。(Photo.4)


8.
DCファン （所要時間:約4分）
8-1. トップカバーを外します。（1項参照）

8-2. フロントパネルAss'yを外します。（6項参照）

8-3. [170]のネジ2本と[180]のナット6角を外して、

 DCファンを外します。(Photo.5)
※ VRシートを外すと楽に作業が行えます。

9.
LEDシート （所要時間:約4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Ass'yを外します。（6項参照）

9-3. [270]のネジ2本を外して、LEDシートを外し

 ます。(Photo.6)
(Photo. 5)
(Photo. 4)
(Photo. 6)
[270]: Bind Head Tapping Screw-S 3.0x6 MFZN2W3
(WE877900) Sタイト＋BIND
Attenuationknobs（アッティネーターノブ） DCfan（DCファン）
Frontpanel1
（フロントパネル1）
[170]
[270]
[D] [D]
VR
[170]
LED
[170]: Bind Head Screw-S 4.0x16 MFZN2W3
(WE98400) 小ネジ＋BIND
[180]:HexgonalNutM4#1(WG16920)ナット6角
[170]
[180]

XP1000/XP2500/XP3500
14

(Photo. 9)(Photo. 8)
(Fig. 5)
10. PSW Circuit Board (Time Required: about 6 min)
10-1 Remove the top cover. (See procedure 1.)
10-2 Remove the front panel assembly. (See procedure 6.)
10-3 Remove the four (4) screws marked [420]. The handles
and the handle angles in left and right can then be
removed. (Photo. 7)
10-4 Remove the eight (8) screws marked [390]. The front
panel 2 can then be removed. (Fig. 5)
10-5 Remove the two (2) screws marked [230]. The PSW
circuit board can then be removed. (Photo. 8, 9)
10.
PSWシート （所要時間:約6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。（6項参照）

10-3. [420]のネジ4本を外して、左右のハンドルと

 ハンドルアングルを外します。(Photo.7)
10-4. [390]のネジ8本を外して、フロントパネル2を

 外します。(Fig.5)
10-5. PSWノブ1個と[230]のネジ2本を外して、PSW

 シートを外します。(Photo.8,9)

[230]: Bind Head Screw-S 3.0x6 MFZN2W3
(WE877900) Sタイト＋BIND
(Photo. 7)
[390]: Hexagonal Socket Set Screw 4.0x16 MFZN2W3 (WF419400) Sタイト六角孔付き
[420]: Bind Head Screw 5.0x16 MFZN2W3 (WG168300) 小ネジ＋BIND
[390]
[390]
Powerswitchknob（PSWノブ）
Frontpanel1
（フロントパネル1）
Frontpanel1
（フロントパネル1）
Handle（ハンドル） Handle（ハンドル）Frontpanel2（フロントパネル2）
Powerswitchknob（PSWノブ）
Frontpanel2（フロントパネル2）
[420][420]
PSW
[230]
PSW
Front view
Front Panel Assembly
Rear view
Front view Front view

15
XP1000/XP2500/XP3500
PAunit（PAユニット）
(Fig. 6)
[P40]: Bind Head Tapping Screw-S 3.0x6 MFZN2W3 (WE877900) Sタイト＋BIND
[P70]: Bind Head Tapping Screw-B 3.0x12 MFZN2W3 (WE877700) 小ネジ＋BIND
(Photo. 10)
[40]: Bind Head Tapping Screw-B 4.0x8 MFZN2B3 (WE962000) Bタイト＋BIND
11. PA Unit (Time Required: about 3 min)
11-1 Remove the top cover. (See procedure 1.)
11-2 Remove the six (6) screws marked [40]. The PA unit
can then be removed. (Photo. 10)
*
Six (6) washers are fitted over the screws [40] between
the main chassis and PA unit. Take care not to loose
these washers in removal.
12.
PAL Circuit Board (Time Required: about 10 min)
12-1 Remove the top cover. (See procedure 1.)
12-2 Remove the PA unit. (See procedure 6.)
12-3 Remove the six (6) screws marked [P40] and the
screws fixing the diode stack, diode, positive thermistor,
transistor, FET and pair transistor marked [P70] (26
screws for XP1000, 30 screws for XP2500, 36 screws
for XP3500). The PAL circuit board can then be removed.
(Fig. 2, 6)
11.
PAユニット （所要時間:約3分）
11-1. トップカバーを外します。（1項参照）

11-2. [40]のネジ6本を外して、PAユニットを外し

 ます。(Photo.10)
※
メインシャーシとPAユニットの間にワッシャー

 6枚が[40]のネジを通して取り付けられていま

 すので無くさないように注意してください。


12.
PALシート （所要時間:約10分）
12-1. トップカバーを外します。（1項参照）

12-2. PAユニットを外します。（6項参照） 
12-3. [P40]のネジ6本とダイオードスタック、ダイ

 オード、ポジスタ、トランジスタ、FET、ペ

 アトランジスタを止めている[P70]のネジ

（ XP1000:26本、XP2500:30本、XP3500:36本）

 を外して、PALシートを外します。(Fig.2,6
)
[P70]
XP1000,XP2500:notinstalled（未実装）XP1000,XP2500:notinstalled（未実装）
XP1000,XP2500:notinstalled
 （未実装）
XP1000:notinstalled（未実装）
XP1000,XP2500:notinstalled
 （未実装）
XP1000:notinstalled
（未実装）
Heatsink
（ヒートシンク）
Heatsink
（ヒートシンク）
Mainchassis（メインシャーシ）
PAL
[40]
[P70]
[P70] [P70]
Left side view
Top view
Right side view
[P40]

XP1000/XP2500/XP3500
16
■ IC BLOCK DIAGRAM（ICブロック図）
NJM2068D-D (XA987A00)
Dual Operational Amplifier
DC: IC403,404
NJM2068MD-TE2 (X3505A00)
Dual Operational Amplifier
P1000S IO1/4: IC301—303
P2500S/P3500S IO1/4: IC301—307
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
+-
+-
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
+-
+-
Note: See parts list for details of circuit board component parts.
SUB (IO 1/4) Circuit Board (X6754D0) ............................................................................................... 17
SUB (IO 2/4) Circuit Board (X6754D0) ............................................................................................... 17
DC Circuit Board (X6753B0) .......................................................................................................... 18/20
PAL Circuit Board (X6751B0) ............................................................................................................ 22
SUB (IO 3/4) Circuit Board (X6754D0) ........................................................................................... 24/25
SUB (IO 4/4) Circuit Board (X6754D0) ........................................................................................... 24/25
SUB (LED) Circuit Board (X6754D0) ............................................................................................. 24/25
SUB (PSW) Circuit Board (X6754D0) ............................................................................................. 24/25
SUB (VR) Circuit Board (X6754D0) ................................................................................................ 18/19
CONTENTS（目次）
注：シートの部品詳細はパーツリストをご参照ください。

17
XP1000/XP2500/XP3500
■ CIRCUIT BOARDS（シート基板図）
HPF
OFF/20Hz/55Hz
GAIN
+4dBu/26dB/32dB MODE STEREO/BRIDGE/PARALLEL
HPF
OFF/20Hz/55Hz
to DC-CN501
to IO3/4-W301B
to VR-CN303
Components side
(部品側)
Components side (部品側)
Pattern side
(パターン側)
Pattern side (パターン側)
● SUB (IO 1/4) Circuit Board
● SUB (IO 2/4)
Circuit Board
INPUT B
INPUT
INPUT A
BA
SUB (IO 1/4, 2/4): 2NA-WF39910-D010

XP1000/XP2500/XP3500
18
A
A’
●
DC Circuit Board
● SUB (VR) Circuit Board
DC: 2NA-WF39790-D010
SUB (VR): 2NA-WF39910-D010
to PAL-CN101
to Power Transformer to IO3/4-W305to IO3/4-CN304
Volume Control
to PAL-CN102 to PAL-CN103 to PAL-CN104
Components side
(部品側)
A Volume Control B
to IO1/4-CN301

19
XP1000/XP2500/XP3500
A
A’
to Power Transformer
to Power Transformerto IO1/4-CN302
to AC IN
to PSW-CN307to PSW-CN308 to PSW-CN309
Components side (部品側)

XP1000/XP2500/XP3500
20
B
B’
●
DC Circuit Board