Replying to myself, I found a schematic for the CCC in an R-93 manual starting at 5-44 but it's a copy and not the greatest. I'll have to buy an R-93 manual for future use.
The other day I replaced a diode and a resistor that had corrosion at the joints from an old battery. Someone previously replaced the battery but didn't wash/neutralize whatever it is that leaked out. It's been on for about 48 hours and hasn't reset again.
Now for the interesting part!
Has anyone ever had any experience soldering/desoldering where a LITHIUM button cell had leaked? This freaked me out. I put the soldering iron on top of the solder joint where it's corroded(scraped it semi clean first for wetting) and after a second or so, BANG! It shot solder out of the joint and made a sound that sounded like shorting out a 100uF cap charged up to 400volts.! (don't ask me how I know) If it was some type of chemical reaction, I was using some tinning stuff with silver in it if that made a difference. I've desoldered hundreds, if not thousands of boards with Ni-cad battery corrosion and never had a reaction like this.
It is one of the strangest things I've ever seen/heard.
Tony
On 2/20/2024 7:38 AM, Tony Miklos wrote:
In what manual would I find a schematic for a CCC 4-07773-10? It's from an R-91 but not in the manual with the amp and power supply schematics. I've seen schematics for other CCC's before but forget what the manual is called?
Also to use in other models do I have to swap the EPROM?
I have one that the battery corroded the board a little bit.
It powers up but resets at will. Did that in the box and also on the bench with the 8 vdc power supplied.
Weird is that the owner said that when it worked, he could only make 5 selections at a time. Then when it was done playing those 5 he could enter 5 more selections. I'm guessing its memory was corrupt and reprogramming would have fixed that.