Yamaha Tyros 3 Service Manual

							11 Tyros3
  1.  Separation of Upper Case Unit and Lower Case Unit.......................................................................12
  2.  DM Circuit Board ..................................................................................................................................13
  3.  DJK Circuit Board ................................................................................................................................14
  4.  AC Upper Frame Assembly .................................................................................................................14
  5.  Power Supply Unit ...............................................................................................................................14
  6.  AC Lower Frame Assembly .................................................................................................................14
  7.  AJK Circuit Board ................................................................................................................................15
 8.  ACIN Wiring Assembly .........................................................................................................................15
  9.  SPOL Circuit Board, SPOR Circuit Board ..........................................................................................15
10.  CK Circuit Board ..................................................................................................................................15
11.  HP Circuit Board ..................................................................................................................................15
12.  HDSB Circuit Board .............................................................................................................................15
13.  PNL Circuit Board ................................................................................................................................16
14.  EN Circuit Board ..................................................................................................................................16
15.  PNC Circuit Board ................................................................................................................................16
16.  PNR Circuit Board ................................................................................................................................16
17.  PNLS Circuit Board ..............................................................................................................................17
18.  MICVR Circuit Board ............................................................................................................................17
19.  USB Circuit Board ................................................................................................................................17
20.  Wheel Assembly (PITCH BEND, MODULATION) ...............................................................................17
21. LCD Unit ................................................................................................................................................17
22.  LCD Lower Assembly and Gear ..........................................................................................................18
23.  LCL Circuit Board ................................................................................................................................18
24.  LCR Circuit Board ................................................................................................................................18
25. Crystal Display .....................................................................................................................................19
26. Keyboard Assembly .............................................................................................................................19
27.  Keys (White and Black Keys) ..............................................................................................................20
28.  Installing Keys (Black and White Keys) .............................................................................................21
29.  Disassembling Keyboard Assembly  .................................................................................................21
29-1 Rubber Contact ....................................................................................................................................21
29-2 MK61L Circuit Board ............................................................................................................................22
29-3  MKH-D Circuit Board, EMKS-FD Circuit Board..................................................................................22
30.  Hard Disk Drive Unit ............................................................................................................................23
 DISASSEMBLY PROCEDURE (Tyros3)
Precautions
Photo A
If you want to turn the instrument or upper case 
unit upside down, prepare supporting materials 
and put the both end portions of the instrument 
or upper case unit on the supporting materials.  
 
 
 
(Fig. A)
During reassembly, reinstall the adhesive tape, 
cord holder, GND wire and ferrite core that were 
removed during disassembly as they were before 
removal. 
Notes on Flat Cable
When connecting to the connector, pay attention 
not to insert the cable inversely. (Photo A) 
Fig. A
Front SideBack Side 
						

							Tyros3
12
1.  Separation of Upper Case Unit and 
Lower Case Unit
 
(The required: About 5 minutes). 
1-1 Remove the four (4) screws marked [S12] and 
seventeen (17) screws marked [S14A], lift the rear side 
of the upper case unit a little, pull it toward you a little 
paying attention not to damage connector assemblies, 
and lift the upper case unit carefully. (Fig. 1, Photo 1)
1-2  Remove the six (6) screws marked [S03A]. The ACDM 
earth angle can then be removed. (Fig. 2)
1-3  Remove the screw marked [S09]. (Fig. 2)
1-4  Disconnect all the connector assemblies connecting the 
upper case unit and lower case unit. The upper case unit 
and lower case unit can then be separated.

[S14A][S12]HDD  ASSEMBLY LOWER CASE UNIT
DIMM COVER
[S14A]
[S14B]
[S12]
[S14A][S14A][S14A]
[S14A]
[S14A]
[S02C]
UPPER CASE UNITLCD UNIT[S14B][S14B]
[S02A][S02A]
KNOB VR (INPUT VOLUME)
KNOB MASTER VOLUME ENCODER KNOB
SLIDER KNOB [1]-[8]
SLIDER KNOB (ASSIGN)
[S02]:  BIND HEAD SCREW 3.0X8 MFZN2B3 (WE983600)
[S12]:  BIND HEAD SCREW 4.0X10 MFZN2W3 (WE96650R)
[S14]:  BIND HEAD TAPPING SCREW-B 4.0X16 MFZN2W3 (WF15410R)
JH
1IPUP

ƒ
„…
UPPER CASE UNIT 
						

							13 Tyros3
Press the ejector levers

until the DIMM unlocks.Pull the DIMM vertically
out of the socket.
LOWER CASE UNIT
DM COVERACDM EARTH ANGLEAC UPPER FRAME ASSEMBLY
[S09][S01A]
• Top View
[S01A] [S01B][S03A] [S03C] [S03A]
2.   DM Circuit Board 
 
(Time Required: About 8 minutes)
 *  If there is a DIMM inserted into the DIMM socket, remove 
the four (4) screws marked [S02A], DIMM cover and the 
DIMM before going to the procedures below. (Fig1, Fig. 3)
2-1  Separate the upper case unit and lower case unit. 
  (See procedure 1.)
2-2 Remove the sine (9) screws marked [S01A] and two 
(2) screws marked [S01B]. The DM cover can then be 
removed. (Fig. 2)
2-3 Remove the four (4) screws marked [S01C] and the 
screw marked [S02B]. The DM circuit board can then 
be removed. (Fig. 4)
[S01]:  BIND HEAD SCREW 3.0X6 MFZN2W3 (WE774000)
[S03]:  BIND HEAD TAPPING SCREW-B 3.0X8 MFZN2W3 (WE774301)
[S09]:  PW HEAD MACHINE SCREW 3.0 X 12 MFZN2W3 (WP817100)
JH

JH

LOWER CASE UNIT
AC LOWER FRAME 
ASSEMBLYPOWER SUPPLY UNIT
POWER SWITCH 
ANGLE
WIRING ASSEMBLY 
ACIN
• Rear View
• Top View
[S01C][S02B][S03D][S03E]DM
[S04C]
[S03E]
[S03E]
[S11]
CN4
JH
 [S01B]:  BIND HEAD SCREW 3.0X6 MFZN2W3 (WE774000)
[S02B]:  BIND HEAD SCREW 3.0X8 MFZN2B3 (WE983600)
[S03]:  BIND HEAD TAPPING SCREW-B 3.0X8 MFZN2W3 (WE774301)
[S04C]:  BIND HEAD TAPPING SCREW-B 3.0X10 MFZN2B3 (WE972200)
[S11]:  BIND HEAD SCREW 4.0X8 MFZN2W3 (WE968500)  *  MAC (Media Access Control) address is stored in the 
DM circuit board. If the DM circuit board is replaced, 
MAC address will be changed. 
						

							Tyros3
14
3.   DJK Circuit Board 
 
(Time Required: About 10 minutes)
3-1   Separate the upper case unit and lower case unit. 
  (See procedure 1.)
3-2  Remove the DM circuit board. (See procedure 2.)
3-3  Remove the three (3) screws marked [S03B], eight (8) 
screws marked [S04A] and two (2) hexagonal lock 
screws marked [S21]. The DJK circuit board can then 
be removed. (Fig. 5) 
4.   AC Upper Frame Assembly 
  (Time Required: about 6 minutes) 
4-1   Separate the upper case unit and lower case unit. (See 
procedure 1.)
4-2 Remove the two (2) screws marked [S03C]. The AC 
upper frame assembly can then be removed. (Fig. 2) 
LOWER CASE UNIT
KNOB VR (LINE IN/MIC [TRIM])
HARD DISK DRIVE UNIT
• Rear View
• Top View
[S03B][S04D]DJKAJK
HP
CK
HDSB
SPOR
SPOL
[S21]
[S03I]
[S03F]
[S04B] [S04B]
[S03G][S03H]
[S04A] [S04A][S04D]
5.   Power Supply Unit 
  (Time Required: About 7 minutes) 
5-1   Separate the upper case unit and lower case unit. 
  (See procedure 1.)
5-2 
Remove the AC upper frame assembly. (See procedure 4.)
5-3  Remove the six (6) screws marked [S03D]. The power 
supply unit can then be removed. (Fig. 4)
  *  No cord should be connected to the CN4 of the 
power supply unit. Pay attention to connection 
during installment. (Fig. 4) 
6.   AC Lower Frame Assembly 
  (Time Required: about 7 minutes) 
6-1   Separate the upper case unit and lower case unit. (See 
procedure 1.)
6-2 
Remove the AC upper frame assembly. (See procedure 4.)
6-3 Remove the two (4) screws marked [S03E] and the 
screw marked [S11]. The AC lower frame assembly can 
then be removed with the power supply unit on it. (Fig. 4)
  *  No cord should be connected to the CN4 of the 
power supply unit. Pay attention to connection 
during installment. (Fig. 4)  JH
 [S03]:  BIND HEAD TAPPING SCREW-B 3.0X8 MFZN2W3 (WE774301)
[S04]:  BIND HEAD TAPPING SCREW-B 3.0X10 MFZN2B3 (WE972200)
[S21]:  HEXAGONAL LOCK SCREW HFS-4S-B1WM (V7569300) 
						

							15 Tyros3
7.   AJK Circuit Board 
  (Time Required: About 8 minutes)
7-1   Separate the upper case unit and lower case unit. 
  (See procedure 1.)
7-2 
Remove the AC upper frame assembly. (See procedure 4.)
7-3  Remove the AC lower frame assembly with the power 
supply unit on it (See procedure 6.)
7-4  Remove the VR knob (LINE IN/MIC [TRIM]). (Fig. 5)
7-5  Remove the four (4) screws marked [S03F] and six (6) 
screws marked [S04B]. The AJK circuit board can then 
be removed. (Fig. 5) 
8.   ACIN Wiring Assembly 
  (Time Required: About 7 minutes) 
8-1   Separate the upper case unit and lower case unit. 
  (See procedure 1.)
8-2 
Remove the AC upper frame assembly. (See procedure 4.)
8-3 Remove the four (4) screws marked [S04C] and the 
screw marked [S11]. The ACIN wiring assembly can 
then be removed together with the power switch angle. 
(Fig. 4)
8-4  Remove the two (2) screws marked [S01D]. The power 
switch angle can then be removed. (Photo 2)
  *  The push button is not part of the ACIN wiring 
assembly. When replacing the ACIN wiring assembly 
(push switch), remove the push button from the 
push switch of the ACIN wiring assembly and install 
it on the new ACIN wiring assembly.  (Photo 2)
9.  SPOL Circuit Board, SPOR Circuit Board
  (Time Required: About 6 minutes) 
9-1   Separate the upper case unit and lower case unit. 
  (See procedure 1.)
9-2  Remove the two (2) screws marked [S04D]. The SPOL 
circuit board can then be removed. (Fig. 5)
  *  The SPOR circuit board can be removed in the same 
way.
10.  CK Circuit Board
  (Time Required: About 6 minutes) 
10-1   Separate the upper case unit and lower case unit. 
  (See procedure 1.)
10-2 Remove the four (4) screws marked [S03G]. The CK 
circuit board can then be removed. (Fig. 5)
11.  HP Circuit Board 
  (Time Required: About 6 minutes) 
11-1   Separate the upper case unit and lower case unit. (See 
procedure 1.)
11-2  Remove the three (3) screws marked [S03H]. The HP 
circuit board can then be removed. (Fig. 5) 
12.   HDSB Circuit Board 
  (Time Required: About 6 minutes)
12-1   Separate the upper case unit and lower case unit. 
  (See procedure 1.)
12-2  Remove the two (2) screws marked [S01B] and four (4) 
screws marked [S03I]. (Fig. 2, Fig. 5)
12-3 Pull off the HDSB circuit board from the HDD 
terminal. (Photo 3)
POWER SWITCH ANGLEPOWER SWITCH ANGLE [S01D]PUSH SWITCH
PUSH BUTTON
PUSH BUTTON
PUSH SWITCH
1IPUP

HARD DISK DRIVE UNIT
HDSB
1IPUP

[S01]:  BIND HEAD SCREW 3.0X6 MFZN2W3 (WE774000) 
						

							Tyros3
16
ENCODER KNOB 
13.   PNL Circuit Board 
  (Time Required: About 10 minutes) 
13-1  Remove the slider knob (ASSIGN) from the control 
panel. (Fig. 1)
13-2  Separate the upper case unit and lower case unit. 
  (See procedure 1.)
13-3 Remove the four (4) screws marked [S05A]. The two (2) 
panel stays A can then be removed. (Fig. 6)
13-4 Remove the twenty-two (22) screws marked [S05B]. 
The PNL circuit board can then be removed. (Fig. 6)
14.   EN Circuit Board 
  (Time Required: About 6 minutes) 
14-1   Remove the encoder knob from the control panel 
  (Fig. 1, Fig. 7).
14-2  Separate the upper case unit and lower case unit. 
  (See procedure 1.)
14-3  Remove the three (3) screws marked [S05C]. The ENC 
assembly can then be removed. (Fig. 9)
14-4  Remove the hexagonal nut marked [A] and the washer 
marked [B]. The ENC stay can then be removed. (Fig. 8) 
UPPER CASE UNIT
PANEL STAY APANEL STAY CPROTECT SHEET PANEL STAY A
PNLS
PNL
PNR
[S05K]
[S05B]
[S05B] [S05A]
[S05B] [S05A]
[S05B][S05H][S05J]
[S05J]
[S05J][S05I]
JH
 [S05]:  BIND HEAD TAPPING SCREW-B 3.0X10 MFZN2W3 (WE774200)
15.  PNC Circuit Board
  (Time Required: About 8 minutes) 
15-1  Remove the eight (8) slider knobs (ASSIGN) and the 
encoder knob from the control panel. (Fig. 1)
15-2  Separate the upper case unit and lower case unit. 
  (See procedure 1.)
15-3  Remove the ENC assembly. (See procedure 14-3)
15-4  Release the lock at the back of the LCD unit, open the 
LCD unit and remove the screw marked [S05D] which 
has been hidden. (Fig. 9, 10)
15-5 Remove the fi ve (5) screws marked [S05E], the screw 
marked [S05F], the screw marked [S05G] and the panel 
stay B. The PNC circuit board can then be removed. 
(Fig. 9)
16.  PNR Circuit Board 
  (Time Required: About 9 minutes) 
16-1   Separate the upper case unit and lower case unit. 
  (See procedure 1.)
16-2 Remove the four (4) screws marked [S05H] and the 
protect sheet. (Fig. 6)
16-3  Remove the two (2) screws marked [S05I]. The panel 
stay C can then be removed. (Fig. 6)
16-4 Remove the fifteen (15) screws marked [S05J]. The 
PNR circuit board can then be removed. (Fig. 6) 
JH

[B] Washer
ENC STAY 
EN
[A] Hexagon Nut
JH
 
						

							17 Tyros3
17.  PNLS Circuit Board 
  (Time Required: About 6 minutes) 
17-1   Separate the upper case unit and lower case unit. 
  (See procedure 1.)
17-2  Remove the four (4) screws marked [S05K]. The PNLS 
circuit board can then be removed. (Fig. 6) 
18.   MICVR Circuit Board 
  (Time Required: About 6 minutes) 
18-1  
Remove the VR knob (INPUT VOLUME) and the 
MASTER VOLUME knob from the control panel. (Fig. 1)
18-2  Separate the upper case unit and lower case unit. 
  (See procedure 1.)
18-3 Remove the five (5) screws marked [S05L]. The 
MICVR circuit board can then be removed. (Fig. 9) 
UPPER CASE UNIT
WHEEL ASSEMBLY
(MODULATION)
LCD UNIT
ENC ASSEMBLY
ENPNC
USB
MICVR
[S05L][S05N][S05E]
[S05F]
[S05M]
[S05D]
[S05C]
[S05G]
[S05M]
PANEL STAY BWHEEL ASSEMBLY
(PITCH BEND
[S05N]
JH
 [S05]:  BIND HEAD TAPPING SCREW-B 3.0X10 MFZN2W3 (WE774200)
19.  USB Circuit Board 
  (Time Required: About 6 minutes) 
19-1   Separate the upper case unit and lower case unit. 
  (See procedure 1.)
19-2  Remove the four (4) screws marked [S05M]. The USB 
circuit board can then be removed. (Fig. 9)
20.  Wheel Assembly (PITCH BEND, MODULATION) 
  (Time Required: About 6 minutes) 
20-1   Separate the upper case unit and lower case unit 
  (See procedure 1).
20-2  Remove the two (2) screws marked [S05N]. The wheel 
assembly (PITCH BEND) can then be removed. (Fig. 9)
  *  The wheel assembly (MODULATION) can be removed 
in the same way. 
21.   LCD Unit (Time Required: About 7 minutes) 
21-1   Separate the upper case unit and lower case unit. 
  (See procedure 1.)
21-2  Remove the two (2) screws marked [S05O]. The stay 
hinge assembly can then be removed. (Fig. 11)
21-3 Remove the four (4) screws marked [S05P] and the 
screw marked [S05G]. (Fig. 9, 11)
21-4  Turn the front side of the upper case unit upward.
  *  Disconnect the connector assemblies of the LCD 
unit in advance.
21-5  Release the lock at the back of the LCD unit, raise the 
LCD unit and remove the two (2) dust proof cloths. 
  (Fig. 10, 12)
21-6 
Tip the LCD unit until it is at an angle shown in Fig. 13, 
lift it a little and then pull it out obliquely upward. (Fig. 13) 
LCD Hook
LCD UNIT
LCD UNIT
JH
 
						

							Tyros3
18
22.  LCD Lower Assembly and Gear 
  (Time Required: About 7 minutes) 
22-1   Separate the upper case unit and lower case unit. 
  (See procedure 1.)
22-2  Remove the LCD unit. (See procedure 21.)
22-3  Remove the eight (8) screws marked [S04E], slide the 
LCD hook and remove the LCD lower assembly and 
gear while shifting the hook at the back of the LCD unit 
as shown in Photo 4. (Fig. 14, Photo 4) 
23.   LCL Circuit Board
  (Time Required: About 7 minutes) 
23-1   Separate the upper case unit and lower case unit. 
  (See procedure 1.)
23-2  Remove the LCD unit. (See procedure 21.)
23-3  Remove the LCD lower case assembly and gear. 
  (See procedure 22.)
23-4 
Lift the stopper of the CN2 connector as shown in Fig. 15 
and then remove the fl at cable and ferrite core. (Fig. 15)
23-5 Remove the five (5) screws marked [S03J]. The LCL 
circuit board can then be removed. (Fig. 15) 
24.   LCR Circuit Board 
  (Time Required: About 7 minutes) 
24-1   Separate the upper case unit and lower case unit. 
  (See procedure 1.)
24-2  Remove the LCD unit. (See procedure 21.)
24-3  Remove the LCD lower case assembly and gear. 
  (See procedure 22.)
24-4  Remove the four (4) screws marked [S03K]. The LCR 
circuit board can then be removed. (Fig. 15) 
STAY HINGE ASSEMBLY
LCD UNIT
[S05O][S05O][S05P][S05P]
JH
 [S05]:  BIND HEAD TAPPING SCREW-B 
  3.0X10 MFZN2W3 (WE774200)JH

LCD UNIT
DUST PROOF FOAM
LCD UNIT
JH

LCD UNIT[S04E] [S04E]
[S04E][S04E]GEAR
Hook
LCD LOWER ASSEMBLY
JH
 [S04E]:  BIND HEAD TAPPING SCREW-B
    3.0X10 MFZN2B3 (WE972200)
HookLCD LOWER ASSEMBLY
1IPUP
 
						

							19 Tyros3
LOWER CASE UNIT
DATA LINE FILTERMK  UNIT
• Top View
[S07A][S05P][S05P]
[18]
[S05P][S05P]
DATA LINE FILTER
FLAT CABLE[S07A]
[S03J]
CN2LCD UPPER CASELCL
LCR
[S03K]
CN2CN2
JH
 [S03]:  BIND HEAD TAPPING SCREW-B 
  3.0X8 MFZN2W3 (WE774301)
[S03L]A
A
LCD UPPER CASECRYSTAL DISPLAY
JH
 [S03L]:  BIND HEAD TAPPING SCREW-B 
  3.0X8 MFZN2W3 (WE774301)
25.   Crystal Display 
  (Time Required: About 7 minutes) 
25-1   Separate the upper case unit and lower case unit. 
  (See procedure 1.)
25-2  Remove the LCD unit. (See procedure 21.)
25-3  Remove the LCD lower case assembly and gear. 
  (See procedure 22.)
25-4 Lift the stopper of the connector at the portion [A] as 
shown in Fig. 16 and then remove the flat cable and 
ferrite core. (Fig. 16)
25-5  Remove the four (4) screws marked [S03L]. The crystal 
display can then be removed. (Fig. 16)
When connecting to the connector, pay attention 
not to insert the cable inversely.
26.   Keyboard Assembly 
  (Time Required: About 9 minutes) 
26-1  Separate the upper case unit and lower case unit. 
  (See procedure 1.)
26-2  Remove the two (2) screws marked [S07A]. The two (2) 
data line fi lters can then be removed. (Fig. 17)
26-3 Remove the eight (8) screws marked [S14B] and fi ve (5) 
screws marked [S05P]. (Fig. 1zFig. 17)
  *  Be sure to loosen the cord holder marked [18] and 
release the flat cable (PC sensor) from the cord 
holder before lifting the keyboard. (Fig.17)
    If the keyboard is lifted without releasing the flat 
cable from the cord holder, the flat cable or the 
sensor may be damaged.
26-4 Raise the MK unit from front side so that the front 
side will face upward while paying attention to the 
connector assemblies. (Photo 5)
26-5  Remove the screw marked [MS13] and two (2) screws 
marked [MS03]. The keyboard assembly can then be 
removed. (Fig. 18)
JH
 [S05P]:  BIND HEAD TAPPING SCREW-B 3.0X10 MFZN2W3 (WE774200)
[S07A]:  PW HEAD TAPPING SCREW-B 3.0X12 MFZN2W3 (WF00210R) 
						

							Tyros3
20
27.   Keys (White and Black Keys)
27-1   Remove the keyboard assembly. 
  (See procedure 26.)
27-2   Remove the key stoppers corresponding to the keys to 
be replaced. (Table 1, Fig. 19)
27-3  White key
27-3-1 Place the white key in the horizontal position and 
remove it, lifting while pushing rearward. (Photo 6)
  *   At this time, a key guide cap may come off together. 
(Photo 8)
27-4  Black key
27-4-1  Remove the white keys on the right and left sides of the 
black key to be removed. (Photo 6)
27-4-2 Place the black key in the horizontal position and 
remove it, lifting while pushing rearward. (Photo 7)
KEY GUIDE CAP
KEY SPRING
1IPUP

1IPUP

1IPUP

[MS13]
[MS03]KEYBOARD ASSEMBLY
 LOWER CASE UNIT
MK UNIT
1IPUP

JH
[MS03]: BIND HEAD TAPPING SCREW-B 3.0X8 MFZN2W3 (WE774301)
[MS13]: BIND HEAD TAPPING SCREW-B 4.0X12 MFZN2W3 (WE98120R)