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Hello,

I have a DX7 with some strange problem :
When i turn it on, it shows on display 27 and Memory protect cardridge on , but not button is reponding.
The keyboard works, and i can hear a saw-like sound when i play it , and it also transmits midi data.

I have moved the cables, shaked the case, etc, for a bad connection, but.......nothing.

Any ideeas ?

Thanks.

Try to internal diagnostics for the DX7. The procedure is to hold down the function key and then press keys 16 and 32 simultaneously.

--- In YamahaDX@..., "nashoo" <nash00_ion@> wrote:

Hello,

I have a DX7 with some strange problem :
When i turn it on, it shows on display 27 and Memory protect cardridge on , but not button is reponding.
The keyboard works, and i can hear a saw-like sound when i play it , and it also transmits midi data.

I have moved the cables, shaked the case, etc, for a bad connection, but.......nothing.

Any ideeas ?

Thanks.

Does it show voice #27? Looks like button #27 is stuck pressed down (like if you were with with your finger pressing it down). This would prevent any other button from working. I would suggest you to check the panel switches.

My thought.

cheerz



________________________________
From: nashoo <nash00_ion@...>
To: YamahaDX@...
Sent: Saturday, August 27, 2011 2:50 PM
Subject: [YamahaDX] DX7 not reponding to any button


??
Hello,

I have a DX7 with some strange problem :
When i turn it on, it shows on display 27 and Memory protect cardridge on , but not button is reponding.
The keyboard works, and i can hear a saw-like sound when i play it , and it also transmits midi data.

I have moved the cables, shaked the case, etc, for a bad connection, but.......nothing.

Any ideeas ?

Thanks.

hello

Am 29.08.2011 16:47, schrieb nashoo:

It shows someting like "27" (i believe some digits are not working), but on the screen it shows "Memory protect cardridge on". I have checked the button, but it is not stucked, it works ok. No ideea what could be wrong. I have also checked the connections between the buttons pannel and mainboard, and they seemed to be allright.

I don't know whether the firmware of the DX works without the panel
buttons, but it might be worth a try to boot WITHOUT a connection
between the panel and the mainboard.

If it starts fine without the panel, you know that the panel pcb is
somehow corrupted.

Florian

I have started the dx without the connections between the buttons and the moterboard. It's the same, the problem remains. So the buttons panels are ok. Im means that it can be a firmware problem ?

--- In YamahaDX@..., Florian Anwander <fanwander@> wrote:

hello

Am 29.08.2011 16:47, schrieb nashoo:

It shows someting like "27" (i believe some digits are not working), but on the screen it shows "Memory protect cardridge on". I have checked the button, but it is not stucked, it works ok. No ideea what could be wrong. I have also checked the connections between the buttons pannel and mainboard, and they seemed to be allright.

I don't know whether the firmware of the DX works without the panel
buttons, but it might be worth a try to boot WITHOUT a connection
between the panel and the mainboard.

If it starts fine without the panel, you know that the panel pcb is
somehow corrupted.

Florian

Just replace battery

--- In YamahaDX@..., "nashoo" <nash00_ion@> wrote:

I have started the dx without the connections between the buttons and the moterboard. It's the same, the problem remains. So the buttons panels are ok. Im means that it can be a firmware problem ?

--- In YamahaDX@..., Florian Anwander <fanwander@> wrote:

hello

Am 29.08.2011 16:47, schrieb nashoo:

It shows someting like "27" (i believe some digits are not working), but on the screen it shows "Memory protect cardridge on". I have checked the button, but it is not stucked, it works ok. No ideea what could be wrong. I have also checked the connections between the buttons pannel and mainboard, and they seemed to be allright.

I don't know whether the firmware of the DX works without the panel
buttons, but it might be worth a try to boot WITHOUT a connection
between the panel and the mainboard.

If it starts fine without the panel, you know that the panel pcb is
somehow corrupted.

Florian

I have measured the batterys voltage, it shows 3v. It shoul be ok.

--- In YamahaDX@..., "uldiszemzars" <uldiszemzars@> wrote:

Just replace battery

--- In YamahaDX@..., "nashoo" <nash00_ion@> wrote:

I have started the dx without the connections between the buttons and the moterboard. It's the same, the problem remains. So the buttons panels are ok. Im means that it can be a firmware problem ?

--- In YamahaDX@..., Florian Anwander <fanwander@> wrote:

hello

Am 29.08.2011 16:47, schrieb nashoo:

It shows someting like "27" (i believe some digits are not working), but on the screen it shows "Memory protect cardridge on". I have checked the button, but it is not stucked, it works ok. No ideea what could be wrong. I have also checked the connections between the buttons pannel and mainboard, and they seemed to be allright.

I don't know whether the firmware of the DX works without the panel
buttons, but it might be worth a try to boot WITHOUT a connection
between the panel and the mainboard.

If it starts fine without the panel, you know that the panel pcb is
somehow corrupted.

Florian

Hello!

I'm curious if this problem was ever solved. I picked up a DX-7 today which I got for free and it has a similar problem. When powered on, it says 88. Memory Protect Cartridge On. It's stuck and none of the buttons work.

Thanks.

Jim

--- In YamahaDX@..., "nashoo" <nash00_ion@> wrote:

I have measured the batterys voltage, it shows 3v. It shoul be ok.

--- In YamahaDX@..., "uldiszemzars" <uldiszemzars@> wrote:

Just replace battery

--- In YamahaDX@..., "nashoo" <nash00_ion@> wrote:

I have started the dx without the connections between the buttons and the moterboard. It's the same, the problem remains. So the buttons panels are ok. Im means that it can be a firmware problem ?

--- In YamahaDX@..., Florian Anwander <fanwander@> wrote:

hello

Am 29.08.2011 16:47, schrieb nashoo:

It shows someting like "27" (i believe some digits are not working), but on the screen it shows "Memory protect cardridge on". I have checked the button, but it is not stucked, it works ok. No ideea what could be wrong. I have also checked the connections between the buttons pannel and mainboard, and they seemed to be allright.

I don't know whether the firmware of the DX works without the panel
buttons, but it might be worth a try to boot WITHOUT a connection
between the panel and the mainboard.

If it starts fine without the panel, you know that the panel pcb is
somehow corrupted.

Florian

Hello!

I'm curious if this problem was ever solved. I picked up a DX-7 today which I got for free and it has a similar problem. When powered on, it says 88. Memory Protect Cartridge On. It's stuck and none of the buttons work.

Thanks.

Jim

--- In YamahaDX@..., "nashoo" <nash00_ion@> wrote:

I have measured the batterys voltage, it shows 3v. It shoul be ok.

--- In YamahaDX@..., "uldiszemzars" <uldiszemzars@> wrote:

Just replace battery

--- In YamahaDX@..., "nashoo" <nash00_ion@> wrote:

I have started the dx without the connections between the buttons and the moterboard. It's the same, the problem remains. So the buttons panels are ok. Im means that it can be a firmware problem ?

--- In YamahaDX@..., Florian Anwander <fanwander@> wrote:

hello

Am 29.08.2011 16:47, schrieb nashoo:

It shows someting like "27" (i believe some digits are not working), but on the screen it shows "Memory protect cardridge on". I have checked the button, but it is not stucked, it works ok. No ideea what could be wrong. I have also checked the connections between the buttons pannel and mainboard, and they seemed to be allright.

I don't know whether the firmware of the DX works without the panel
buttons, but it might be worth a try to boot WITHOUT a connection
between the panel and the mainboard.

If it starts fine without the panel, you know that the panel pcb is
somehow corrupted.

Florian

Fixed! Had to replace IC 14, IC 20, and IC 21 Chips. Works great now.

--- In YamahaDX@..., "Jim Atwood" <photoshootjapan@> wrote:

Hello!

I'm curious if this problem was ever solved. I picked up a DX-7 today which I got for free and it has a similar problem. When powered on, it says 88. Memory Protect Cartridge On. It's stuck and none of the buttons work.

Thanks.

Jim

--- In YamahaDX@..., "nashoo" <nash00_ion@> wrote:

I have measured the batterys voltage, it shows 3v. It shoul be ok.

--- In YamahaDX@..., "uldiszemzars" <uldiszemzars@> wrote:

Just replace battery

--- In YamahaDX@..., "nashoo" <nash00_ion@> wrote:

I have started the dx without the connections between the buttons and the moterboard. It's the same, the problem remains. So the buttons panels are ok. Im means that it can be a firmware problem ?

--- In YamahaDX@..., Florian Anwander <fanwander@> wrote:

hello

Am 29.08.2011 16:47, schrieb nashoo:

It shows someting like "27" (i believe some digits are not working), but on the screen it shows "Memory protect cardridge on". I have checked the button, but it is not stucked, it works ok. No ideea what could be wrong. I have also checked the connections between the buttons pannel and mainboard, and they seemed to be allright.

I don't know whether the firmware of the DX works without the panel
buttons, but it might be worth a try to boot WITHOUT a connection
between the panel and the mainboard.

If it starts fine without the panel, you know that the panel pcb is
somehow corrupted.

Florian

Fixed! Had to replace IC 14, IC 20, and IC 21 Chips. Works great now.

--- In YamahaDX@..., "Jim Atwood" <photoshootjapan@> wrote:

Hello!

I'm curious if this problem was ever solved. I picked up a DX-7 today which I got for free and it has a similar problem. When powered on, it says 88. Memory Protect Cartridge On. It's stuck and none of the buttons work.

Thanks.

Jim

--- In YamahaDX@..., "nashoo" <nash00_ion@> wrote:

I have measured the batterys voltage, it shows 3v. It shoul be ok.

--- In YamahaDX@..., "uldiszemzars" <uldiszemzars@> wrote:

Just replace battery

--- In YamahaDX@..., "nashoo" <nash00_ion@> wrote:

I have started the dx without the connections between the buttons and the moterboard. It's the same, the problem remains. So the buttons panels are ok. Im means that it can be a firmware problem ?

--- In YamahaDX@..., Florian Anwander <fanwander@> wrote:

hello

Am 29.08.2011 16:47, schrieb nashoo:

It shows someting like "27" (i believe some digits are not working), but on the screen it shows "Memory protect cardridge on". I have checked the button, but it is not stucked, it works ok. No ideea what could be wrong. I have also checked the connections between the buttons pannel and mainboard, and they seemed to be allright.

I don't know whether the firmware of the DX works without the panel
buttons, but it might be worth a try to boot WITHOUT a connection
between the panel and the mainboard.

If it starts fine without the panel, you know that the panel pcb is
somehow corrupted.

Florian