Yamaha PW1D Service Manual
SERVICE MANUAL
PA
011507
HAMAMATSU, JAPAN
0.27K-8091 Printed in Japan '00.03
CONTENTS
SPECIFICATIONS···································································· 3
PANEL LAYOUT······································································· 3
CONNECTOR CIRCUIT DIAGRAM ········································· 4
DISASSEMBLY PROCEDURE················································· 5
CIRCUIT BOARD······································································ 6
PARTS LIST
CIRCUIT DIAGRAM
POWER SUPPLY
PW1D
2
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
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: 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 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
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 parts replacement. Recheck all work before you apply power to the
unit.
WARNING
Components having special characteristics are marked and must be replaced with parts having specification equal to those
originally installed.
IMPORTANT NOTICE FOR THE UNITED KINGDOM
Connecting the Plug and Cord
IMPORTANT. The wires in this main lead are coloured in
accordance with the following code:
BLUE: NEUTRAL
BROWN: LIVE
As the colours of the wires in the main lead of this apparatus may not
correspond with the coloured markings identifying the terminals in
your plug, proceed as follows:
The BLUE wire must be connected to the terminal that is marked with
the letter N (or coloured BLACK).
The BROWN wire must be connected to the terminal that is marked
with the letter L (or coloured RED).
Be certain that neither core is connected to the earth terminal of the
three pin plug.
SPECIFICATIONS
PW1D
3
Note: See operation manual for details.
PANEL LAYOUT
PW1D
4
CONNECTOR CIRCUIT DIAGRAM
FAN
3P
CN1
3P
CN3
2P
CN8
(FOR LED)
2P
CN2
2P
CN101
9P
CN6
10P
CN7
3P
CN1
3P
(FOR FAN)
3P
CN2
3P
CN33PCN23PCN4
3P
CN42PCN5
27P
(MAIN)
[POWER]
[ON/OFF]
AC INLET
[DC OUTPUT]
3P
FG
CN1
FG
(SUB)
POWER
SUPPLY
PW1D
KEC-92552
PW-SW
CONSOLE-DC
**
**
Circuit Board CN No. Pin No.
AC INLET
N
L
POWER SUPPLY
PW1D (SUB)
1
2
CN1
Circuit Board CN No. Pin No.
DC OUTPUT 1
4
2
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
22
23
24
26
27
3
POWER
SUPPLY
PW1D
(MAIN)
POWER SUPPLY
PW1D (SUB)
CN6
CN7
CN1
CN101
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
10
1
2
3
1
2
FG
Fig. 2
[170]
[170]
[170]Front panel
Rack Mount Angle
Rack Mount Angle
[150]
[260]
[280]
[260]: Oval Head Screw-B 4.0x8 MFZN2BL (VS153600)
[280]: Oval Head Screw-B 4.0x8 MFZN2BL (VS153600)
[150]: Bind Head Screw 3.0x8 MFZN2BL (VB659000)
[170]: Oval Head Screw-B 4.0x8 MFZN2BL (VS153600)
• Left side <Front View>
• Right side
PW-SW
Power supply unit
[300]
[300] [130]
[130]
[300]
[130]
[300]
[130]
[130]
[300]
[300]
[300]
[130]: Bind Head Tapping Screw-B A4.0x8 MFZN2BL (VC688800)
[300]: Bind Head Tapping Screw-B A4.0x8 MFZN2BL (VC688800)
Fig. 1
DISASSEMBLY PROCEDURE
PW1D
5
1. Power Supply Unit
1-1 Remove the fourteen (14) screws marked [300]. The top
cover can then be removed. (Fig. 1)
1-2 Remove the six (6) screws marked [130]. The power
supply unit can then be removed. (Fig. 1)
2. PW-SW Circuit Board
2-1 Remove the three (3) screws marked [260] and the three
(3) screws marked [280]. Each rack mount angle can then
be removed. (Fig.2)
2-2 Remove the six (6) screws marked [170]. The front panel
can then be removed. (Fig. 2)
2-3 Remove the two (2) screws marked [260]. The PW-SW
circuit board can then be removed. (Fig. 2)
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