Faults Tyros 4

[Serafín]

Hello,

I've only been on this forum for a short time and it's been very helpful.

I request help for a problem I have with my Tyros. I also apologize for the translation, as this text is automatically generated by google.

I have a Tyros 4 and when I press some of the buttons they do other functions that they should be programmed for. Sometimes it does get it right, but most of the time it's failing.

For example:
Pressing the "ORGAN" button, the "DIGITAL REC MENU" screen appears.
Pressing the "FLUTE/CLARINET" button randomly changes the VOICES RIGTH 1 - 2
Pressing the "RIGTH3" button randomly turns RIGTH 1 - 2 and LEFT on/off.
Pressing the "OTS 2" button Turns "FREEZE" on and the "REGISTRATION BANK" screen appears
And so up to 7 different buttons that don't do what they should.

I have a Yamaha MFC10 pedal connected, programmed to activate the buttons mentioned above, and it does so correctly.

I've reset the keyboard to no avail.

I think the problem could be with the board or with the programming. Could anyone help me please?

Thanks.

[EileenL]

Have you tried disconnecting the MC10 and see if this still happens.

[Serafín]

Elieen, I have disconnected MC10 and it keeps crashing.
Thanks for the suggestion

[overover]

Hi Serafin,

Based on your description, I suspect that there is an internal hardware error, e.g. a loose contact or a short circuit at an internal ribbon cable/connector, a defect in the button diode matrix or the circuit that evaluates the button matrix. I don't think even a complete software reset would do anything here. I recommend checking the instrument at an authorized Yamaha Service Center.


Best regards,
Chris

[travlin-easy]

There is a procedure that may help solve, or diagnose your problem.

First, unplug all external items, foot switches, usb drives, etc.

1. power turned off
2. Press C2#, F2, G2# (all three together) and while holding them depressed:
3. Switch the power on
You will see the word test on the display

With the tempo =/- button you can go to the test you wish to perform. Start/stop will start the test. Wait for the test to complete before trying to begin another.

Hope this helps,

Gary

[Serafín]

Hi,

Thanks Chris, I guess I'll eventually have to take the instrument to an authorized Yamaha service, but I'd like to exhaust my options.

Gary, I have done what you propose and I get all these options to check:

TEST Device Connection Check [Int.HDD]: Device found [Exp. Module]: Device found 001 Version 002 Memori Check1 All 003 ROM Check1 004 RAM Chcek1 005 Backup ROM Check1 006 Wave ROM Check1 007 Effect RAM Check1 008 TG 1 Check 009 TG 2 Check 010 SSP1 Check 011 Pitch Check 012 Output R Check 013 Output L Check 014 Output Sub-1 Check 015 Output Sub-2 Check 016 EQ Low Check 017 EQ Mid Check 018 EQ High Check 019 SP MUTE Check 020 MUTE Check 021 MIC Check 022 SIOF Check 023 SW,LED Check 024 All LED On Check 025 Red LED On Check 026 Blue/Green LED On Check 027 Other LED On Check 028 All LCD On Check 029 ALL LCD Off Check 030 LCD Pattern 031 Pitch Bend Whell Check 032 Modulation Wheel Check 033 SL ider Check 034 Pedal 1 Check 035 Pedal 2 Check 036 Pedal 3 Check 037 MIDI Check 038 Loop Send / Return Check 039 Sub Out Check 040 VIDEO OUT NTSC RGB 041 VIDO OUT PAL RGB 042 RGB Out Check 043 USB to Device/Host Check 044 USB storage Device Check 045 Internal HDD Check 046 LAN Check 047 Keyboard Type Check 048 Touch Check 049 Exp. Module Check 050 ROM Check2 051 RAM Check2 052 Backup TOM Check2 053 WAVE ROM Check2 054 Effect RAM Check2 055 Panel PCB Check (PNL) 056 Panel PCB Check (LCL) 057 Panel PCB Check (LCR) 058 Panel PCB Check (PNC) 059 Panel PCB Check (PNR) 060 Panel PCB Check (LCL/R/C) 061 Factory Set 062 ErP Check 063 Test Exit

The problem is that I don't know what I'm looking for either.

Could someone tell me which option to checking ?

Thanks

[Paula]

un plug the KB and turn it back on .... did you bring it back to factory  could help
                     Paula

[travlin-easy]

That list of tests pretty much will test all of the software and some of the hardware on the keyboard. Run each and every one of them and you may discover what is going wrong and what you can do to bring about a fix.

Good luck,

Gary

[Serafín]

Thanks for the suggestions. If I manage to solve it, I will report it in this forum.

[overover]

Hi Serafin,

If you want to use the internal test program (mentioned by Gary), you should definitely download the Tyros4 Service Manual here:
>>> https://psrtutorial.com/lessons/workshops/ServiceManuals.html

There you will find, among other things, a precise description of the test program and important information on the use of the individual test routines. However, if, as I suspect, there is a hardware defect, the problem will not be solved by using the test program alone or by a complete factory reset (which can be triggered directly in the test program).


Best regards,
Chris