Casio CZ/ VZ/ FZ - Pro Series

On Tue, Aug 21, 2018 at 01:43:17AM +0000, sean@... [CZsynth] wrote:
> I picked up a used CZ-101 in order to build a patch editor for it (and other CZ synths of course).  But its headphones are very quiet and its line out is extremely quiet.
>  
> 
>  1. My reading of the schematics suggests that the line out (not headphones) is the only one with the relay.  Is this right?  If so, if the headphones are also quiet, wouldn't this suggest that the relay is probably not the issue?  Or is this expected behavior?  Are there other parts which commonly go bad?
>  
> 
>  2. I have read that the CZ-1 has a specific replacement relay; but that the CZ-101 (and 1000?) have *different* model relays for which this replacement is incompatible.  Can anyone tell me the part number for an acceptable replacement relay for the CZ-101?

The relay will have a part number on top which you can search for,
possibly on eBay, and buy replacements.  I've just done exactly that to
get a replacement relay for the gas control module in my car (gas
conversion has a relay to switch off the fuel injectors and a relay to
switch on the gas).

You can just bypass the relay in this case, all it does is mute the
switch-on thump from the output amp.  You don't need it.

If the line output is quiet and the headphone output is equally quiet,
the fault is upstream of the relay.  What are the levels like at the
volume control?

-- 
Gordonjcp