Author Topic: beta series scematic wanted or...  (Read 1977 times)

0 Members and 1 Guest are viewing this topic.

devoid

  • Guest
beta series scematic wanted or...
« on: February 11, 2003, 01:44:15 am »
i blew the two 6amp fuses on the power amp board. it says to replace with same 6amp type but doesn't say neccesary voltage. does any know? if anyone has a scematic let me know, thanks.

devoid at dangpow dot com

devoid

  • Guest
uh...
« Reply #1 on: February 11, 2003, 01:45:00 am »
its a beta bass.

Offline Don T.

  • Sr. Member
  • ****
  • Posts: 488
beta series scematic wanted or...
« Reply #2 on: February 11, 2003, 08:59:09 am »
Hello:
1. Beta series schematics are on this site on the service manual page.

2. The fuses are 125/250 volt fast blow type.

3. If it is blowing fuses it may have one or more of the following problems:
Bad rectifier
Bad filter cap
Shorted output transistor
Shorted protection diode

Don T.
Don T.

If it's too loud, you're too old.

devoid

  • Guest
beta bass
« Reply #3 on: February 11, 2003, 03:26:48 pm »
thanks don!
my problem origionated when a circuit board screw came loose and shorted the amp out. for a while the only audible output was a loud
deep hum. i opened it up and noticed what had happened, noticing that the two 6amp fuses, were blown. i also noticed that they were 7amp fast acting fuses. i don't know if this is an issue. so today i put in new 6amp fuses and the one closest to the transformer blew.  the portion of the circuit board where this fuse holder is attached is a little burned on the soder side of the board. the other connections in the area are...one side of a filter cap, white wire off transformer, then on the other side of the fuse connection is a resistor. this is the area in question, there is visible burning on both sides of the fuse holder connections. hmm any ideas.
i am going to go grab the scematic thanks.