Suzuki GP-3 digital piano

[G1959]

Can anyone help me?

I bought Suzuki gp-3 digital piano for repair. I fixed sticky keys, it plays piano voice only, none of buttons work. I discovered two connectors but couldn’t find any cables to connect them. Are they optional or something is missing?

 

[alec_t]

Are they optional or something is missing?

What does the user manual say?
Welcome to ETO!

 

[sagor1]

It is possible that main board was used in several models, with different options. So, that makes it possible that those two sockets are for some option you do not have, or they might be for original testing/programming. Most likely for other options. It may have been for an add-on board also.
Since CH5-7 and CH6-7 have an "*" beside them on the silkscreen, that suggests it is an option...

 

[Lightium]

What do the other buttons do?

 

[rjenkinsgb]

none of buttons work. I discovered two connectors but couldn’t find any cables to connect them

The PCB in the photos looks more like a power / audio amp board than logic - what buttons do not work, and can you see what board they connect to??

Any photos of other board may help?

 

[tepalia02]

You can check this document.

 

[G1959]

What do the other buttons do

It is possible that main board was used in several models, with different options. So, that makes it possible that those two sockets are for some option you do not have, or they might be for original testing/programming. Most likely for other options. It may have been for an add-on board also.
Since CH5-7 and CH6-7 have an "*" beside them on the silkscreen, that suggests it is an option...

I found video on YouTube that shows those two sockets same as mine so no more questions on these two sockets. Thanks

 

[G1959]

What do the other buttons do?

I tried hard reset per owner manual but it didn’t work. None of buttons works.

 

[G1959]

The PCB in the photos looks more like a power / audio amp board than logic - what buttons do not work, and can you see what board they connect to??

Any photos of other board may help?

 

[G1959]

View attachment 143800

These 3 cables connect control panel with the board

 

[G1959]

These 3 cables connect control panel with the board

 

[rjenkinsgb]

Am I imagining it, or is the connector on the end of the green PCB (bottom edge in the photo) only partly seated?

 

[alec_t]

Have you measured the voltage of the CR2032 lithium battery?

 

[G1959]

Am I imagining it, or is the connector on the end of the green PCB (bottom edge in the photo) only partly seated?

Double checked all connections. Look good. Thanks

 

[G1959]

Have you measured the voltage of the CR2032 lithium battery?

Installed new battery. No change. Thanks

 

[CNurd]

Have you tried probing the control panel for voltage readings of any kind, while it's turned on? Any sign that the control panel pcb is receiving power from anywhere?