Yamaha PW-800-W Service Manual
POWER SUPPLY
PW800W
SERVICE MANUAL
PW800W
011740
PA
200408-オープンプライス
CONTENTS
SPECIFICATIONS ................................................... 3
PANEL LAYOUT .................................... 4
DIMENSIONS ............................................................ 5
CIRCUIT BOARD LAYOUT ................. 6
DISASSEMBLY PROCEDURE .............................. 7
CIRCUIT BOARDS ....................................... 10
PARTS LIST
OVERALL CONNECTOR CIRCUIT DIAGRAM
（総コネクタ接続回路図）
OVERALL CIRCUIT DIAGRAM
（目次）
（
総合仕様
（パネルレイアウト）
（寸法図）
（シート基板図）
Copyright (c) Yamaha Corporation. All rights reserved. ’04.09
）
（ユニットレイアウト）
（分解手順）
（総回路図）
HAMAMATSU, JAPAN
1
PW800W
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 per-
IMPORTANT : This presentation or sale of this manual to any individual or firm does not constitute authorization certifi-
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
IMPORTANT : Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power
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.
cation, recognition of any applicable technical capabilities, or establish a principal-agent relationship of
any form.
accumulated by grounding yourself to the ground bus in the unit (heavy gauge black wires connect to
this bus.)
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.
IMPORTANT NOTICE FOR THE UNITED KINGDOM
Connecting the Plug and Cord
WARNING: THIS APPARATUS MUST BE EARTHED
IMPORTANT. The wires in this mains lead are coloured in
accordance with the following code:
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 colored GREEN or GREENand-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.
GREEN-AND-YELLOW : EARTH
BLUE : NEUTRAL
BROWN : LIVE
This applies only to products distributed by Yamaha-Kemble Music (U.K.) Ltd.(3 wires)
WARNING
Components having special characteristics are marked and must be replaced with parts having specification equal to those
originally installed.
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ください。
2
PW800W
General Specifications
Power Consumption 1000W
Dimensions (W x H x D) 480 mm x 142 mm x 384 mm
Weight 10 kg
Included Accessories Power cord, Cord clamp, Owner's Manual
Temperature Range
Operating 10°C – 35°C
Storage -20°C – 60°C
Power Connector Pin Diagram Power Supply Cable Pin Assignments
DC PARALLEL INPUT
DC OUTPUT
1
2
3
4
5
6
7
8
9
10 11
12
13 14
15
16 17 18
19
20
21 22
23
12
3
4
5
6789
10111213
14
15
1617181920
21
22
23
No. Function No. Function
1
+24V
13
GND
2
+24V
14
GND
3
+24V
15
GND
4
+24V
16
GND
5
+24V
17
GND
6
+24V
18
GND
7
+24V
19
CAUTION (+)
8
+24V
20
CAUTION (Ð)
9
+24V
21
DETECT A
10
GND
22
DETECT B
11
GND
23
DETECT GND
12
GND Frame GND
一般仕様
消費電力 1000Ｗ
外形寸法（WxHxD） 480mm×142mm×384mm
質量 10kg
付属品 電源コード、誤脱防止クランプ、
取扱説明書、保証書
温度範囲 使用時 10℃〜35℃
保管時
–
20℃〜60℃
（電源コネクターの形状） （電源ケーブルのピン配列）
SPECIFICATIONS
（総合仕様）
3
PW800W
PANEL LAYOUT
（パネルレイアウト）
Front Panel（フロントパネル）
q POWER ON/OFF Switch
q
（[POWERON/OFF]スイッチ）
Rear Panel（リアパネル）
r
t
w DC OUTPUT Connector
e DC PARALLEL INPUT Connector
r AC IN Connector
t GROUND Screw Terminal
ew
（DCOUTPUTコネクター）
（DCPARALLELINPUTコネクター）
（ACIN端子）
（アース用ネジ）
4
PW800W
DIMENSIONS
（寸法図）
430
351
355
378
384
480
132
10
142
Units: mm
（単位）
5
PW800W
<Top view>
Receptacle assembly
（レセプタクルAss'y）
Power transformer
（電源トランス）
<Front view>
DC
AC
LED
Switch assembly (Power switch)
（スイッチAss'y（電源スイッチ））
Power supply unit (AC/DC convertor)
（電源ユニット）
Window angle
（ウインドアングル）
CIRCUIT BOARD LAYOUT
（ユニットレイアウト）
6
PW800W
■ DISASSEMBLY PROCEDURE
（分解手順）
1. Top Cover
(Time required : About 1 minute)
Remove the fourteen (14) screws marked [390]. The
top cover can then be removed. (Fig. 1)
2. Power Supply Unit
(Time required : About 2 minutes)
2-1. Remove the top cover. (See procedure 1)
2-2. Remove the six (6) screws marked [240]. The power
supply unit and the window angle can then be removed.
(Fig. 1)
2-3. Remove the three (3) screws marked [225] and the
screw marked [230A]. The window angle can then be
removed from the power supply unit. (Fig. 1)
2-4. Remove the four (4) screws marked [230B]. The SW
power angle can then be removed from the power
supply unit. (Fig. 1)
3. DC Circuit Board
(Time required : About 2 minutes)
3-1. Remove the top cover. (See procedure 1)
3-2. Remove the eleven (11) scr e ws marked [310]. The DC
circuit board can then be removed. (Fig. 1)
3-3. Remove the four (4) screws marked [290] and the
screw marked [300]. The heat sink and holder can then
be removed from the DC circuit board. (Fig. 1)
1. トップカバー（所要時間：約1分）
[390]のネジ14本を外し、トップカバーを外します。
（図1）
2. 電源ユニット（所要時間：約2分）
2-1. トップカバーを外します。（1項参照）
2-2. [240]のネジ6本を外し、電源ユニットとウインドア
ングルを外します。（図1）
2-3. [225]のネジ3本と[230A]のネジ1本を外し、電源ユ
ニットからウインドアングルを外します。（図1）
2-4. [230B]のネジ4本を外し、電源ユニットからSW電源
取付け金具を外します。（図1）
3. DCシート（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. [310]のネジ11本を外し、DCシートを外します。
（図1）
3-3. [290]のネジ4本と[300]のネジ1本を外し、DCシート
からヒートシンクDS/ヒートシンク取付金具を外し
ます。（図1）
4. AC Circuit Board
(Time required : About 1 minute)
4-1. Remove the top cover. (See procedure 1)
4-2. Remove the six (6) screws marked [200]. The AC
circuit board can then be removed. (Fig. 1)
5. LED Circuit Board
(Time required : About 1 minute)
5-1. Remove the top cover. (See procedure 1)
5-2. Remove the two (2) screws marked [180]. The LED
circuit board can then be removed. (Fig. 1)
6. Power T ransformer
(Time required : About 1 minute)
6-1. Remove the top cover. (See procedure 1)
6-2. Remove the two (2) screws marked [317]. The power
transformer can then be removed. (Fig. 1)
7. Switch Assembly (Power Switch)
(Time required : About 4 minutes)
7-1. Remove the top cover. (See procedure 1)
7-2. Remove the connector pins connected to K6 to K9
terminals of the AC circuit board.
7-3. Remove the six (6) screws mark ed [330] and the f our
(4) screws marked [355]. The front panel can then be
removed. (Fig. 1)
7-4. Remove the switch assembly (power switch) by
bending its claw. (Fig. 1)
8. Front Fan Motor
(Time required : About 3 minutes)
8-1. Remove the top cover. (See procedure 1)
8-2. Remove the six (6) screws mark ed [330] and the f our
(4) screws marked [355]. The front panel can then be
removed. (Fig. 1)
8-3. Remove the power switch. (See procedure 7)
8-4. Remove the four (4) screws marked [120A]. The fan
motor (front) and the two (2) fan guides can then be
removed. (Fig. 1)
4. ACシート（所要時間：約1分）
4-1. トップカバーを外します。（1項参照）
4-2. [200]のネジ6本を外し、ACシートを外します。（図1）
5. LEDシート（所要時間：約1分）
5-1. トップカバーを外します。（1項参照）
5-2. [180]のネジ2本を外し、LEDシートを外します。
（図1）
6. 電源トランス（所要時間：約1分）
6-1. トップカバーを外します。（1項参照）
6-2. [317]のネジ2本を外し、電源トランスを外します。
（図1）
7. スイッチAssy（電源スイッチ）
（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. ACシートのK6〜K9端子の圧着端子を外します。
7-3. [330]のネジ6本と[355]のネジ4本を外し、フロント
パネルを外します。（図1）
7-4. 電源スイッチのツメを曲げて、スイッチAssy（電源
スイッチ）を外します。（図1）
8. フロントDCファンモーター（所要時間：約3分）
8-1. トップカバーを外します。（1項参照）
8-2. [330]のネジ6本と[355]のネジ4本を外し、フロント
パネルを外します。（図1）
8-3. 電源スイッチを外します。（7項参照）
8-4. [120A]のネジ4本を外し、DCファンモーター（front）
とファンガイド2個を外します。（図1）
7
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