Yamaha-PW8-psu-sm 维修电路原理图.pdf
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1、SERVICE MANUALHAMAMATSU, JAPANCopyright (c) Yamaha Corporation. All rights reserved. PDF & 08.07SPECIFICATIONS(総合仕様) .3DIMENSIONAL DIAGRAM(寸法図) .3PANEL LAYOUT() .4CIRCUIT BOARD LAYOUT() .5DISASSEMBLY PROCEDURE(分解手順) .6IC BLOCK DIAGRAM(IC 図) .10CIRCUIT BOARDS(基板図) .10PARTS LISTBLOCK DIAGRAM()CIRCUIT
2、DIAGRAM(回路図) CONTENTS(目次)PA011911PW8POWER SUPPLY200807 RadioFans.CN 收音机爱 好者资料库PW82 WARNINGComponents having special characteristics are marked and must be replaced with parts having specifi cation equal to those originally installed.IMPORTANT NOTICEThis manual has been provided for the use of author
3、ized 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 an
4、d 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
5、 or the appointed service representative.IMPORTANT : This presentation or sale of this manual to any individual or firm does not constitute authorization certification, recognition of any applicable technical capabilities, or establish a principal-agent relationship of any form.The data provided is
6、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
7、obligation to retrofit. Should any discrepancy appear to exist, please contact the distributors 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 ga
8、uge black wires connect to this bus.)IMPORTANT : Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power to the unit.WARNING: This product contains chemicals known to the State of California to cause cancer, or birth defects or other reproductive harm.DO N
9、OT 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 l
10、ocated inside the enclosure of this product, wash your hands before handling food. 印部品、安全維持重要部品。交換場合、安全必指定部品使用。IMPORTANT NOTICE FOR THE UNITED KINGDOMConnecting the Plug and CordWARNING: THIS APPARATUS MUST BE EARTHEDIMPORTANT. The wires in this mains lead are coloured in accordance with the followi
11、ng code: GREEN-AND-YELLOW : EARTH BLUE : NEUTRAL BROWN : LIVEAs the colours of the wires in the mains lead of this apparatus may not correspond with the coloured markings identifying the terminals inyour plug proceed as follows:The wire which is coloured GREEN-and-YELLOW must be connected to the ter
12、minal in the plug which is marked by the letter E or by the safety earth symbol or colored GREEN or GREEN-and-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 termina
13、l which is marked with the letter L or coloured RED. This applies only to products distributed by Yamaha Music U.K. Ltd. (3 wires)RadioFans.CN 收音机爱 好者资料库3PW8 SPECIFICATIONS(総合仕様)General SpecificationsPower Connector Pin DiagramPower Supply Cable Pin AssignmentsSecondaryVoltage+15VGreen LED: On (+15
14、V), Off (less than +10 V or more than +21 V)-15VGreen LED: On (-15 V), Off (less than -21 V or more than -10 V)+12VGreen LED: On (+12 V), Off (less than +7.6 V or more than +18 V)+48V (Phantom Voltage)Green LED: On (+48 V), Off (less than +32 V)Power Consumption265 W (IM8-40), 230 W (IM8-32), 200 W
15、(IM8-24)DimensionsHeight: 100.5 mm, Depth: 412 mm, Width: 480 mmNetWeight11 kgDC OUTPUTDC PARALLEL INPUT1238910546732110986754No.Function1Power supply remote2+15 V315 V GND4+48 V GND5-15 V6+12 V7+12 V GND/power supply remote8Power supply remote9+48 V10FRAME GND DIMENSIONAL DIAGRAM(寸法図)8812.5392.564.
16、5250374.5404.55.576.2300410304381176.23244.7H: 100.5W: 480D: 412Units: mmPW84 PANEL LAYOUT()q POWER Switchw Operation Monitor (+48V, +12V, +15V, -15V)?Front Panel()?Rear Panel()q DC PARALLEL INPUT Connectorw DC OUTPUT Connectore AC IN Connectorr Ground Screw Terminalq POWER w (+48V、+12V、+15V、-15V)q
17、DC PARALLEL INPUT 端子w DC OUTPUT 端子e AC IN 端子r 用5PW8 CIRCUIT BOARD LAYOUT()AC1DC1DC2FRONT PANEL 1(1) DC ASSEMBLY (L)(DC Ass y (L) ) DC ASSEMBLY (R)(DC Ass y (R) )AC2AC3PW86 DISASSEMBLY PROCEDURE(分解手順)Fig. 1(図1)AC1AC3AC2TOP COVER()HEXAGONAL NUT A(六角A)SHIELD BOARD(板)HEXAGONAL NUT B(六角B)470 x 3470 x 540
18、0 x 2470 x 3300 x 6160A x 4350 x 4470470MAIN CHASSIS ASSEMBLY(ASS Y)FRONT PANEL 2(2)FRONT PANEL 1(1)POWER SWITCH KNOB(PSW)HEXAGON HEAD BOLT(六角)PLATE A(A)RUBBER L(L)RUBBER S(S)PLATE B(B)WASHER()DC ASSEMBLY (L)(DC ASS Y (L) )FAN (L)(DC (L) )DC ASSEMBLY (R)(DC ASS Y (R) )FAN (R)(DC (R) )EARTH CABLE C(線
19、C)EARTH CABLE B(線B)EARTH CABLE A(線A)PS WIRING ASSEMBLY(OUTPUT)(PS 束線 (OUTPUT) )AC WIRING ASSEMBLY(AC 束線)AC WIRING ASSEMBLY(AC 束線)PS WIRING ASSEMBLY(DC PARALLEL INPUT)(PS 束線 (DC PARALLEL INPUT) )PS WIRING ASSEMBLY(OUTPUT)(PS 束線 (OUTPUT) )PS WIRING ASSEMBLY(DC PARALLEL INPUT)(PS 束線 (DC PARALLEL INPUT)
20、 )160B x 4240 x 680 x 240 x 240 x 2140 x 3120 x 2140 x 35050370 x 4380A380B380C400350370AThe parts marked “” are power transformer components.(電源構成部品。 )40: BIND HEAD SCREW(小)4.0X16 MFZN2W3 SP (WE98400R)50: HEXAGONAL NUT(角)M4 #1 (WG169200)80: BIND HEAD TAPPING SCREW-S()3.0X5 MFZN2W3 (WE98020R)120: BI
21、ND HEAD TAPPING SCREW-S()3.0X5 MFZN2W3 (WE98020R)140: BIND HEAD TAPPING SCREW-B()4.0X8 MFZN2B3 (WE962000)160: BIND HEAD TAPPING SCREW-B()4.0X8 MFZN2B3 (WE962000)240: BIND HEAD TAPPING SCREW-S()3.0X8 MFZN2B3 (WF25750R)300: BIND HEAD TAPPING SCREW-S()3.0X5 MFZN2W3 (WE98020R)350: BIND HEAD TAPPING SCRE
22、W-B()3.0X10 MFZN2B3 (WE972200)370: BIND HEAD TAPPING SCREW-B()3.0X10 MFZN2B3 (WE972200)380: BIND HEAD TAPPING SCREW-S()4.0X6 MFZN2B3 (WE974300)400: BIND HEAD TAPPING SCREW-B()3.0X10 MFZN2B3 (WE972200)470: BIND HEAD TAPPING SCREW-B()4.0X8 MFZN2B3 (WE962000)7PW81. Top Cover (Time required: About 2 min
23、utes) Remove the eleven (11) screws marked 470. The top cover can then be removed. (Fig. 1)2. Power Transformer (Time required: About 3 minutes)2-1 Remove the top cover. (See procedure 1.)2-2 Remove the hexagonal nut A. The shield board and plate A can then be removed. (Fig. 1)2-3 Remove the hexagon
24、al nut B and remove the hexagon bolt from the bottom side of the main chassis assembly. The parts marked A can then be removed. (Fig. 1)3. DC Assembly3-1 Remove the top cover. (See procedure 1.)3-2 DC1 Circuit Board (Time required: About 5 minutes)3-2-1 Remove the four (4) screws marked 160A. The DC
25、 assembly (R) can then be removed. (Fig. 1)3-2-2 Remove the three (3) screws marked R70A. The transistor fi xing plate A can then be removed. (Photo 1)3-2-3 Remove the four (4) screws marked R70B. The transistor fi xing plate B can then be removed. (Photo 2)3-2-4 Remove the six (6) screws marked R40
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