Table Of Contents; Disassembly Procedure (Tyros4) - Yamaha TYROS4 Service Manual

DISASSEMBLY PROCEDURE (Tyros4)

Precautions
• 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)
Fig. A
1. Separation Of Upper Case Unit And Lower Case Unit.......................................................................12
2. Dm Circuit Board ..................................................................................................................................13
3. Djack Circuit Board ...........................................................................................................................13
4. Ck Circuit Board ..................................................................................................................................13
5. Ac Upper Frame Assembly .................................................................................................................14
6. Power Supply Unit ...............................................................................................................................14
7. Ac Lower Frame Assembly .................................................................................................................14
8. Ajack Circuit Board ...........................................................................................................................14
9. Acin Connector Assembly .................................................................................................................15
10. Spol Circuit Board, Spor Circuit Board ..........................................................................................15
11. Hp Circuit Board ..................................................................................................................................15
12. PNL Circuit Board ................................................................................................................................15
13. EN Circuit Board ..................................................................................................................................15
14. Pnc Circuit Board ................................................................................................................................15
15. Pnr Circuit Board ................................................................................................................................17
16. Pnls Circuit Board ..............................................................................................................................17
17. Micvr Circuit Board ............................................................................................................................17
18. USB Circuit Board ................................................................................................................................17
19. Wheel Assembly (PITCH BEND, MODULATION) ...............................................................................17
20. Lcd Unit ................................................................................................................................................18
21. Lcd Lower Case Assembly And Gear ................................................................................................18
22. Lcl Circuit Board ................................................................................................................................19
23. Lcr Circuit Board ................................................................................................................................19
24. Crystal Display .....................................................................................................................................19
25. Keyboard Assembly .............................................................................................................................19
26. Keys (White And Black Keys) ..............................................................................................................20
27. Installing Keys (Black and White Keys) .............................................................................................21
28. Disassembling Keyboard Assembly .................................................................................................21
29. Hard Disk Drive Unit ............................................................................................................................23
• 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)
Front Side
Photo A
Tyros4
Back Side (Taping Side)
11