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Yamaha Tyros 3 Service Manual

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Page 11

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...

Page 12

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...

Page 13

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...

Page 14

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....

Page 15

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...

Page 16

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)...

Page 17

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...

Page 18

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...

Page 19

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...

Page 20

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...
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