Yamaha P 85 Service Manual

							SERVICE MANUAL
HAMAMATSU, JAPAN
SERVICE MANUAL
Copyright (c) Yamaha Corporation. All rights reserved.  PDF    &  ’07.10
SPECIFICATIONS¢
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PANEL LAYOUT¢ÍÉçè ž¢Ä£  ......................................4
CIRCUIT BOARD LAYOUT¢âÇ¿Äè ž¢Ä£  .................5
DISASSEMBLY PROCEDURE¢
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LSI PIN DESCRIPTION¢-4* z ;ó
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IC BLOCK DIAGRAM¢*$ Òé¿«
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CIRCUIT BOARDS¢³”Ä,
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TEST PROGRAM¢ÂµÄÓé¬åÜ£  .............................31/35
DATA BACKUP¢â”²”Ô»wÌ¿«ž¿Ó£  ...........39/43
MIDI IMPLEMENTATION CHART  ...........................................47
MIDI DATA FORMAT  ...............................................................48
PARTS LIST
BLOCK DIAGRAM¢Òé¿«¼ ž¬åÜ£
CIRCUIT DIAGRAM¢sÏ
$£  CONTENTS¢èÍ£
P-85
P-85S
CL001792
P-85: 200710  ¦”ÓïÓå µ
P-85S: 200710  ¦”ÓïÓå µ 
						

							P-85/P-85S
2
 WARNING
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.
Components having special characteristics are marked  and must be replaced with parts having specifi cation equal to those
originally installed.
IMPORTANT NOTICE FOR THE UNITED KINGDOM
Connecting the Plug and Cord
IMPORTANT. The wires in this mains lead are coloured in accordance with the following code:
 BLUE : NEUTRAL
 BROWN : LIVE
As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured makings identifying the terminals in
your plug proceed as follows:
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.
Making sure that neither core is connected to the earth terminal of the three pin plug.
• This applies only to products distributed by Yamaha-Kemble Music (U.K.) Ltd.  (2 wires)
WARNING: 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 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.
 
						

							3 P-85/P-85S
 SPECIFICATIONS
Keyboard 88 keys (A-1–C7)
Sound Source AWM Stereo Sampling
Polyphony (Max.) 64
Voice Selection 10
Effect Reverb
Volume Master Volume
Controls Dual, Metronome, Transpose, Tuning, Touch (Hard/Medium/Soft/Fixed)
Pedal SUSTAIN PEDAL*
Demo Songs 10 Voice Demo Songs, 50 Piano Preset Songs
Recording/Playback 1-track recording/playback (1 user song)
MIDI Local On/Off, Transmit/Recieve channel, Program change On/Off, Control change On/Off
Jacks/Connectors MIDI (IN/OUT), PHONES, DC IN 12V, SUSTAIN, PEDAL UNIT
Main Amplifi ers 6 W + 6 W
Speakers (12 cm × 6 cm) × 2
Dimensions (W × D × H) 1,326mm × 295mm × 151.5mm [52-3/16 × 11-5/8 × 5-15/16]
Weight 11.6 kg (25 lbs., 9 oz.)
Power Supply Adaptor: PA-5D, PA-150, or an equivalent recommended by Yamaha
Power Consumption 20 W
Accessories
Owner’s Manual, Quick Operation Guide, AC Power Adaptor, Pedal (FC5), Music Rest
When an optional FC3 Foot Pedal or an optional LP-5 Pedal Unit is connected, the half pedal effect can be used.
Specifi cations and descriptions in this owner’s manual are for information purposes only. Yamaha Corp. reserves the right to 
change or modify products or specifi cations at any time without prior notice. Since specifi cations, equipment or options may 
not be the same in every locale, please check with your Yamaha dealer.
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							P-85/P-85S
4
 PANEL LAYOUT¢ÍÉçè ž¢Ä£
q [STANDBY/ON] switch
w [MASTER VOLUME] slider
e [DEMO/SONG button
r SELECT [ 
 ] [  ]/TEMPO  [] [ ] buttons
t [METRONOME] button
y [REC] button
u [PLAY] button
i VOICE buttons
o [PEDAL UNIT] jack
!0
 [DC IN 12V] jack
!1
 MIDI [IN] [OUT] terminals
!2
 [SUSTAIN] jack
!3
 [PHONES] jack
-
40(
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and terminals as 
seen when viewed 
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the instrument.
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and terminals as 
seen when viewed 
from the rear of 
the instrument.
q  
						

							5 P-85/P-85S
 CIRCUIT BOARD LAYOUT¢âÇ¿Äè ž¢Ä£
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Upper case assembly
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Lower case assembly
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							P-85/P-85S
6
Fig. 1


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[33][33][33][33][33][37] FFC Cover
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Lower case assembly
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							7 P-85/P-85S
DM
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HP
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[30A][30B][32]
[30B][32]
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							P-85/P-85S
8

Upper case assembly[30E]
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