Archive of the former Yahoo!Groups mailing list: Yamaha CS80

Hey,

I haven´t serviced a CS-80 yet, but on the CS-50 the +8,5 and -6,5 power the
KAS and SH board. Are your CS-80´s recapped and have all new logic installed ?

It should not be a big problem to find which board has the short, desolder the
E, +8,5 and -6,5 set a DVM to continuity test (diode mode) and probe E and +8,5
if there is resistance between these tracks try E and -6,5 if the DVM beeps or gives
a very low reading you will have found your shorted board and the rails that have
a short. Do this test without the power on.

Best of luck,
/RL

---

-----Originalmeddelande-----
Från: martinjboisvert@...
Till: yamahacs80@yahoogroups.com
Datum: 2013-10-02 09:29
Ämne: [yamahacs80] RE: the continuing saga of my CS-80 repair.. blowing fuse

 

 

I am having the same problem... even worse some idiot had even put a 2.5A fuse instead of the 500mA and it still blows! Did you find out where it shorted, is there a particular place I should start at?  I would appreciate any help I can get!!!

Martin

 

---In yamahacs80@yahoogroups.com, <noddyspuncture@...> wrote:

∗Middle∗ fuse? - there are only two fuses in my 80's... the slot
nearest the PSU circuit board is empty..!?!

Is that normal or am I missing one...?

Cheers,
TOM

--- In yamahacs80@yahoogroups.com, "Heath Finnie" <heathfinnie@...> wrote:
>
> If I plug in the main wire loom into the psu and turn it on, the
middle fuse blows immediately
> and I lose the +8.5 and -6.5. If I unplug the main socket into the
PSU and turn it on (after
> replacing the fuse it doesn't blow)
>