Yamaha P 85 Service Manual

							Note: See parts list for details of circuit board component parts.
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Components having special characteristics are marked  and must be replaced with parts 
having specifi cation equal to those originally installed.
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CIRCUIT DIAGRAM
BLOCK DIAGRAM & WIRING¢Òé¿«¼ ž¬åÜ

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¯G	Íw«™£ Notation for Circuit Diagrams
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€tmMo£ Connection of connectors.
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(Example)
H-3 is indicates the location of the counter inter-sheet connector. 
(The alphabet indicates horizontal direction and the number indicates vertical direction) Page 5 are the page of a circuit diagram.
to AM-CN101
 
						

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6 A
BCDEFGH
P-85/P-85SBLOCK DIAGRAM & WIRING
BLOCK DIAGRAM & WIRING
28CA1-2001022995-1
3
1


LD x 3 GHS   88Keys
5MHz
SYSTEM
RESET
+3.6V
OSC
ADC DAC
24bitLPF
REGULATOR+3.3V
REGULATOR+5VREGULATOR+5V
REGULATOR+2.5V
 CPU (SWL01T)
SLAVE  CPU (SWL01T)
MASTER
FLASH ROM 64M
Program WAVE
FLASH ROM 32M
Program WAVE FLASH ROM
4M
DRAM 4MCPU (MKS)
UPD789022GB
17, 38
14, 15, 
18
5
4
12
12 4
16
24, 47, 66, 90, 12029 37 38 39
12
12
1640, 44,
42, 43 57, 58, 63
49
48
50
26
51
35, 36
421-414
2
6 10 78
8 8
411 14 9-12 1, 72, 3 
5, 6
18, 31,
32, 34
34
1, 2 1, 24 22 27 28
3.3Và5V +5D
X301
X101IC301 (44P)
IC401 (16P)
IC107 (10P)
IC301 (6P)
TR301, TR302JK301JK303 JK401 JK501
JK502
JK302
JK601 IC402 (8P) LD702-LD704SW702-SW717
VR701LD701SW701
IC501
(3P)
IC502
(3P)IC401 (3P)IC102 (8P)
IC103 (8P) IC701 (8P)
TR401
TR402 IC105 (14P)
IC402 (3P) IC302 (5P)
IC303 (5P)
IC105 (5P)
IC102 (48P)
IC103 (48P)IC101 (128P)
IC201 (128P)
IC104 (48P)
IC202 (48P)
+5D
5
+5D
37
+3.3D
+3.3D
4, 15, 46, 89, 119
+2.5D
24, 47, 66, 90, 120
+3.3D
4, 15, 46, 89, 119
+2.5D
37
+3.3D
37
+3.3D
1, 6,
22
+3.3D+5A
+3.3D+5A
+5A+12A
+12V+5D
RY201 TR201
TR  SW EQPOWER AMP
6W x 2
LA4625TR  SW
L, R
L, R
+5D
+5A +3.3D
+3.3D +3.3D+3.3D
MIDI
I/F +2.5D
B1-B15
MKS_CLK MKS_RX DATA
MKS_ACK
LED [1-3]
LSI_ICNSDO, SYSCLK
BCLK, WCLKSPOFFSW [0-4]
SOUT [1-4]
/PSWI
CN2 (27P)CN501 (6P)
CN103 (6P) CN704 (22P) (PN2)
CN602 (22P) CN1 (17P)
CN1 (17P)
CN1 (17P)
CN601 (7P)
CN301 (7P)
CN102 (4P) CN501 (25P)
CN101 (25P)CN3 (17P)
CN301 (27P)
/PSWONHPSW
SPOFF
PSWCNT
DAMPER1, DAMPER2, SOSTE, SOFT with Heat sink
¢Lä
[
ÇV£with a heat sink
¢Lä
[
ÇV£
HPSW
/PSWI
PSWCNT /MUTE
HPSW
PSWCNT
SUSTAIN MIDI_TX MIDI_RX/MUTEHPSW
PSWCNT /MUTE/MUTE MKS_IC
MRSTN
33.8688MHz Control
Address
Data
Control
Address
Data
Control
Address
DataControl
Address
Data
Control
Address
Data
N11-N16
N21-N26
SW x 16MASTER
VOLUMEPILOT LED STANDBY/ON
A10KΩ x2
+5A
54
+5D
PN1
PN2
DM
AMJK Keyboard
GHL88M
GHL88H
GHL88L
HP
PHONE 1
PHONE 2
INPEDAL UNITDAMPER 1, 2
SOSTE
SOFT
OUT
MIDI
PEDALDC IN 12VSPEAKERS


12 x 6 cm L
R
+–
CN701
CN501CN103 CN102CN703
CN704
CN301
GHL88H
PN1
HP
AM
DM
JK
PN2
GHL88M
GHL88L
CN1 CN3 CN2 CN1 CN1CN501 CN101CN602CN301CN601
:
.
B
>
@
=
;
No.
Unit Name
¢âÇ¿ÄÊ£Location
¢é­”³ãï£
Parts No.Connector
AssemblySource
¢

¢i£Destination
¢

¢
ΣRemarks
¢
‹ß£
:
@
.
;
=
B
>Keyboard assembly 2  WK443800  FFC Cable  GHL88M-CN2  *3  *3  DM-CN301  *1  *4  27P
M102 (WK74940)  FFC 2  DM-CN501  *1  *4  AM-CN101  *1  *4  25P
M103 (WK74950)  FFC 3  PN2-CN704  *1  *4  DM-CN602  *1  *4  22P
M104 (WK74960)  FFC 4  DM-CN601  *1  *4  JK-CN301  *1  *4  7P
Overall assembly  M105  (WK74970)  FFC 5  PN1-CN701  *1  *4  PN2-CN703  *1  *4  16P
M106 (WK57110)  SP  AM-CN102  *1  *5 SPEAKER L 
*2 *6  4P
     SPEAKER R
M107 (WK57160)  HP  AM-CN103  *1  *7  HP-CN501  *1  *7  6P
 *OTUBMMBUJPO
						

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P-85/P-85SDM CIRCUIT DIAGRAM
DM CIRCUIT DIAGRAM28CC1-2001022991-1 4
BA33BC0FP (X5889A00)
REGULATOR +3.3V
DM: IC501
1. INPUT
2. GND
3. OUTPUT12
3
RH5RZ25CA-T1-F (X3679A00)REGULATOR +2.5VDM: IC502
1. GND
2. INPUT
3. OUTPUT
1
2
3
1SS355 TE-17 (VT332900)
DIODE
DM: D501-509
1: ANODE
2: CATHODE
1
2
UDZS6.8BTE-17 (VU172200)ZENER DIODE 6.8VDM: ZD1
1: ANODE
2: CATHODE
1
2
2SC2412K(VV556400)
TRANSISTOR
DM: TR501
1 23
1: EMITTER
2: BASE
3: COLLECTOR1 23
SYSTEM RESET
CPU (SWL01T)
ADC
CPU (SWL01T)
CPU (MKS)
DAC
OP AMPREGULATOR +3.3V REGULATOR +2.5V AND GATE AND GATEFLASH ROM 64M
PROG./WAVE
FLASH ROM 32M
PROG./WAVE FLASH ROM 4MDRAM 4M
ORDetection voltage: 3.6 V
¢U	Z?y
7£
DM
:  Ceramic Capacitor (chip)
¢½¿Ó·åÛ¿«¯ïÃï±”£
to JK-CN301

to PN2-CN704

to GHL88M-CN2
to AM-CN101

Note  :  See parts list for details of circuit board
    component parts.  

						

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BCDEFGH
P-85/P-85SAM, HP, JK, PN1, PN2, PEDAL CIRCUIT DIAGRAM
AM, HP, JK, PN1, PN2, PEDAL CIRCUIT DIAGRAM28CC1-2001022994-15
PEDAL
28CC1-2001015873
Photo CouplerOP AMP OP AMP
REGULATOR +5V
REGULATOR +5V OP AMPPOWER AMP. 6W+6W
PN1
JK
AM
HP
PN2
:  Ceramic Capacitor
¢·åÛ¿«¯ïÃï±”£
: Mylar Capacitor
¢Ú å”¯ïÃï±”£
: Semiconduct Ceramic Capacitor
¢
R‹.·åÛ¿«¯ïÃï±”£
to DM-CN602

to DM-CN501

to DM-CN601

Note : See parts list for details of circuit board
  component parts.  
†
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P-85/P-85SGHL88H, GHL88L, GHL88M CIRCUIT DIAGRAM (P-85/P-85S)
GHL88H, GHL88L, GHL88M CIRCUIT DIAGRAM (P-85/P-85S)6
GHL88H
GHL88M
GHL88L
Keyboard Type
28CC1-2000006192
28CC1-2000006194 28CC1-2000006193
2
Note : See parts list for details of circuit board
    component parts.