ATTN - Sansui Techs
We have a receiver in protection and fiddling with VR01 & VR02 is not helping.
We want to check DC above protection. Is that checked with meter at pin 13/14 and ground?
Might consider pulling the output transistors before continuing with readings--
-Lee
The owner of the receiver took it to a local tech this past week and was told the outputs were shorted and the amp boards have to be rebuilt.
Or without a dim bulb tester.
- Pete
I'll rephrase my question above.
What is the simplest/quickest way to determine the outputs are blown?
Pull them and test?
they will test short in circuit if they are ..BUT need pulling to test again as if they test ok then find the shorted power supply or driver transistor etc ..if shorted still test everything else ...
i am not sure if outputs randomly short under normal use but if they did more damage will likely occur ...
if you can find the in detailed history of the unit all the better in a diagnosis .
one example ....it was fine until i shorted the speaker terminals .
Have you tested the Sankens yet ? Or you just planning on shotgunning it ? Yes, those Onsemi's will be sufficiant. MJ21193G and MJ21194G.....The stock Sankens (2sc1403 & 2sa745 I believe) look like they could be replaced with OnSemi MJ21193/4's. Does anyone concur?
Have you tested the Sankens yet ?