Yamaha Motif 8 Service Manual
Here you can view all the pages of manual Yamaha Motif 8 Service Manual. The Yamaha manuals for Musical Instrument are available online for free. You can easily download all the documents as PDF.
Page 31
![Page 31
31 MOTIF8
23.
Front Rail Assembly (Time required: about 7 minutes)
23-1. Turn the unit upside down. Then remove the five
(5) screws marked [330] and the two screws
marked [340a]. (Fig. 2)
23-2. Open the control panel. (See procedure 1)
23-3. Remove the two (2) screws marked [340b]. The
front rail assembly can then be removed. (Fig. 9)
24.
Keyboard Assembly (Time required: about 9 minutes)
24-1. Open the control panel. (See procedure 1)
24-2. Remove the two (2) screws marked [340b]. (Fig. 9)
24-3. Remove...](http://img.usermanuals.tech/thumb/83/96612/w300_d_1506082757-yamaha-motif-8-service-manual_d-30.png "Page 31
31 MOTIF8
23.
Front Rail Assembly (Time required: about 7 minutes)
23-1. Turn the unit upside down. Then remove the five
(5) screws marked [330] and the two screws
marked [340a]. (Fig. 2)
23-2. Open the control panel. (See procedure 1)
23-3. Remove the two (2) screws marked [340b]. The
front rail assembly can then be removed. (Fig. 9)
24.
Keyboard Assembly (Time required: about 9 minutes)
24-1. Open the control panel. (See procedure 1)
24-2. Remove the two (2) screws marked [340b]. (Fig. 9)
24-3. Remove...")
31 MOTIF8 23. Front Rail Assembly (Time required: about 7 minutes) 23-1. Turn the unit upside down. Then remove the five (5) screws marked [330] and the two screws marked [340a]. (Fig. 2) 23-2. Open the control panel. (See procedure 1) 23-3. Remove the two (2) screws marked [340b]. The front rail assembly can then be removed. (Fig. 9) 24. Keyboard Assembly (Time required: about 9 minutes) 24-1. Open the control panel. (See procedure 1) 24-2. Remove the two (2) screws marked [340b]. (Fig. 9) 24-3. Remove...
Page 32
![Page 32
32MOTIF8
26.
Exchanging the PC Sensor (Time required: about 12 minutes)
26a. Preparing a replacement PC sensor
The sensor sheet holder of PC sensor assy is
bonded to keyboard assy and it can not be re-
moved.
So in the event of a replacemet, send for a new PC
sensor assembly (V6782900), disengage the PC
sensor (with spring) from it, and use the PC sensor
as the replacement parts.
26a-1. Remove the three (3) screws marked [P60] on the
new PC sensor assembly. (Fig.23-1)
26a-2. Disengage the GHDPC circuit...](http://img.usermanuals.tech/thumb/83/96612/w300_d_1506082757-yamaha-motif-8-service-manual_d-31.png "Page 32
32MOTIF8
26.
Exchanging the PC Sensor (Time required: about 12 minutes)
26a. Preparing a replacement PC sensor
The sensor sheet holder of PC sensor assy is
bonded to keyboard assy and it can not be re-
moved.
So in the event of a replacemet, send for a new PC
sensor assembly (V6782900), disengage the PC
sensor (with spring) from it, and use the PC sensor
as the replacement parts.
26a-1. Remove the three (3) screws marked [P60] on the
new PC sensor assembly. (Fig.23-1)
26a-2. Disengage the GHDPC circuit...")
32MOTIF8 26. Exchanging the PC Sensor (Time required: about 12 minutes) 26a. Preparing a replacement PC sensor The sensor sheet holder of PC sensor assy is bonded to keyboard assy and it can not be re- moved. So in the event of a replacemet, send for a new PC sensor assembly (V6782900), disengage the PC sensor (with spring) from it, and use the PC sensor as the replacement parts. 26a-1. Remove the three (3) screws marked [P60] on the new PC sensor assembly. (Fig.23-1) 26a-2. Disengage the GHDPC circuit...
Page 33
![Page 33
33 MOTIF8
26b-3. Remove the slave string from the V-spring assem-
bly. (Fig.19, Fig20)
26b-4. Remove the slave string from the PC sensor
spring. (Fig.21, Fig.22)
26b-5. Disconnect the connector assembly from the
GHDPC circuit board. (Fig.23)
26b-6. Remove the three (3) screws marked [P60] to
remove the GHDPC circuit board. (Fig.23)
26b-7. Remove the PC sensor spring from the sensor
sheet holder. (Fig.23)
Note: When removing the PC sensor spring or the
GHDPC circuit board, hold the slit of the sensor...](http://img.usermanuals.tech/thumb/83/96612/w300_d_1506082757-yamaha-motif-8-service-manual_d-32.png "Page 33
33 MOTIF8
26b-3. Remove the slave string from the V-spring assem-
bly. (Fig.19, Fig20)
26b-4. Remove the slave string from the PC sensor
spring. (Fig.21, Fig.22)
26b-5. Disconnect the connector assembly from the
GHDPC circuit board. (Fig.23)
26b-6. Remove the three (3) screws marked [P60] to
remove the GHDPC circuit board. (Fig.23)
26b-7. Remove the PC sensor spring from the sensor
sheet holder. (Fig.23)
Note: When removing the PC sensor spring or the
GHDPC circuit board, hold the slit of the sensor...")
33 MOTIF8 26b-3. Remove the slave string from the V-spring assem- bly. (Fig.19, Fig20) 26b-4. Remove the slave string from the PC sensor spring. (Fig.21, Fig.22) 26b-5. Disconnect the connector assembly from the GHDPC circuit board. (Fig.23) 26b-6. Remove the three (3) screws marked [P60] to remove the GHDPC circuit board. (Fig.23) 26b-7. Remove the PC sensor spring from the sensor sheet holder. (Fig.23) Note: When removing the PC sensor spring or the GHDPC circuit board, hold the slit of the sensor...
Page 34
34MOTIF8 26c-4. Insert the slave string into the slit of the PC sensor spring. (Fig.21, Fig.22) Move the PC sensor spring slightly to make sure that the slave string can move smoothly. 26c-5. Insert the slave string into the slit of the V-spring assembly. (Fig.19, Fig.20) Make sure that the V-spring assembly can move smoothly in the direction along the string. 26c-6. Remove the tool (VB299400). 27. Exchanging the strings set (Time required: about 12 minutes) Note: This procedure is only for the case that...
Page 35
35 MOTIF8 Make sure that PC sensor spring can move smoothly in the direction along the string. Make sure that the slave string is kept in the center of the stopper without removing from it. 27b-5. Apply the accessorius adhesive tape on the frame and install the cloth cover. (Fig.30-1) 27b-6. Make sure that the position of the PC sensor spring accords with the mark on the sensor sheet holder. (Fig.30) Note: The position of the sensor is automatically detected and acceptable margine of error is within...
Page 36
![Page 36
36MOTIF8
Stopper L88Hammer, White Key
Slit
Frame
Spring
HookStopper L88
Hammer, White Key
(Fig.33) (Fig.34) (Fig.35)
Upside
Spring
Frame
Hook
(Fig.36)
(Fig.37)
(Fig.38)
[E]
[F]White Key
Key GuideKey Spring
[B][C]
[D]
White Key
Spring
(Rod : TX000670)
28-4. Hammer, White Key
After a key has been removed, push the key spirng down
once to take it out of the hook. (Fig. 34)
Place the HEDaf-EBUS keyboard assembly upside
down and peel away the stopper L88. The hammer of
the white key can then be removed. (Fig....](http://img.usermanuals.tech/thumb/83/96612/w300_d_1506082757-yamaha-motif-8-service-manual_d-35.png "Page 36
36MOTIF8
Stopper L88Hammer, White Key
Slit
Frame
Spring
HookStopper L88
Hammer, White Key
(Fig.33) (Fig.34) (Fig.35)
Upside
Spring
Frame
Hook
(Fig.36)
(Fig.37)
(Fig.38)
[E]
[F]White Key
Key GuideKey Spring
[B][C]
[D]
White Key
Spring
(Rod : TX000670)
28-4. Hammer, White Key
After a key has been removed, push the key spirng down
once to take it out of the hook. (Fig. 34)
Place the HEDaf-EBUS keyboard assembly upside
down and peel away the stopper L88. The hammer of
the white key can then be removed. (Fig....")
36MOTIF8 Stopper L88Hammer, White Key Slit Frame Spring HookStopper L88 Hammer, White Key (Fig.33) (Fig.34) (Fig.35) Upside Spring Frame Hook (Fig.36) (Fig.37) (Fig.38) [E] [F]White Key Key GuideKey Spring [B][C] [D] White Key Spring (Rod : TX000670) 28-4. Hammer, White Key After a key has been removed, push the key spirng down once to take it out of the hook. (Fig. 34) Place the HEDaf-EBUS keyboard assembly upside down and peel away the stopper L88. The hammer of the white key can then be removed. (Fig....
Page 37
37 MOTIF6 / MOTIF7 / MOTIF8 LSI PIN DESCRIPTION MBCG46183-129 (XV833A00) GATE ARRAYDM: IC37PIN NO.NAME I/O FUNCTIONPIN NO.NAME I/O FUNCTION 1D5 I/ O 25TX 31 O2D6 I/ O Data bus 26RX32 I3D7 I/ O 27TX 32 OSeri al data4/I RQ0 I /O Inte r r up t re quest 28RX33 I5/I RQ1 I /O Inte r r up t re quest 29TX 33 I /O6VSS6 Gr ound 30/I C I Initial Cle ar7/I RQ2 I /O Inte r r up t re quest 31VSS31 Gr oun d8/I RQ3 I /O Inte r r up t re quest 32XI I Cr ystal qua r ts i n put9/RD I Read 33VSS33 Gr oun d10/WR I Wr i t...
Page 38
38MOTIF6 / MOTIF7 / MOTIF8 SPC7214F0B (XY625A00) SCSI ControlDM: IC52 Power supply +3.3V Port DMA data bus Ground SCSI I/O signal (Low active) Power supply +5V SCSI REQ signal (Low active) Ground SCSI C/D signal (Low active) SCSI SEL signal (Low active) Ground SCSI MSG signal (Low active) SCSI RST signal (Low active) Ground SCSI ACK signal (Low active) Power supply +5V SCSI BSY signal (Low active) Not used Ground Power supply +5V SCSI ATN signal (Low active) Ground SCSI data parity (Low active) Power...
Page 39
39 MOTIF6 / MOTIF7 / MOTIF8 TC203C760HF-002 (XS725A00) SWP30B (AWM Tone Generator coped with MEG) Standard Wave Processor)DM: IC54 PIN NO .NAME I/O FUNCTIONPIN NO .NAME I/O FUNCTION1 Vss (Ground) 121 VSS (Ground)2 CA 0 I 12 2 HM D0 I/O3 CA 1 I 12 3 HM D1 I/O4 CA 2 I 12 4 HM D2 I/O5 CA 3 I 12 5 HM D3 I/O6 CA 4 I 12 6 HM D4 I/O7 CA 5 I A dd res s bu s of i nte rna l reg i st er 12 7 HM D5 I/O8 CA6 I 128 HMD6 I/O W ave memory data bus (Upper 16 bits)9 CA 7 I 12 9 HM D7 I/O10 CA 8 I 13 0 HM D8 I/O11...
Page 40
40MOTIF6 / MOTIF7 / MOTIF8 D65621GF-028-3B9 (XS370A00) SMIDM: IC69 1 LMA24 I 41 VDD - 2 LMA23 I 42 L1RAS2 O RAS2 for LoMem SIMM 1 3 LMA22 I 43 L1RAS3 O RAS3 for LoMem SIMM 1 4 LMA21 I Low Memory Address 44 GND - 5 LMA20 I 45 HDRAS0 O RAS for HiMem DRAM 0 6 LMA19 I 46 HDRAS1 O RAS for HiMem DRAM 1 7 LMA18 I 47 GND - 8 HMA24 I 48 VDD - 9 HMA23 I High Memory Address49 LDRAS0 O RAS for LoMem DRAM 0 10 HMA22 I 50 LDRAS1 O RAS for LoMem DRAM 1 11 HMA21 I 51 LMA1 I Low Memory Address 12 GND - No.12 52 LMA0 I...