Relay is not clicking on ..
On the diode I get 13.89 on 1 side and 8.49 on the other side of it and 5.30 across it .
Any ideas or is there a common problem with these amps?
On the diode I get 13.89 on 1 side and 8.49 on the other side of it and 5.30 across it .
Any ideas or is there a common problem with these amps?
Does anyone know if the 20 pin IC controls the regulated voltages ?
I'm getting 10 volts on pin 8 of the opamps but only getting -0.54 volts on pin 4 of the opamps ..
I'm getting 10 volts on pin 8 of the opamps but only getting -0.54 volts on pin 4 of the opamps ..
It's possible that no one knows anything about that model but could help if it's similar to another, more popular amp. Posting photos in the first post can save a lot of time.
Sorry i know ive been told a 1,000 times about pics..
Just have alot going on right now..
Heres a few pics of the board ..
I know D205 is out of the boar right now for testing alo gonna replace the cap thats melted from someone else's attempted repair..
D205 is testing good and i also replaced it still get no voltage on pin 4 of the opamps
Just have alot going on right now..
Heres a few pics of the board ..
I know D205 is out of the boar right now for testing alo gonna replace the cap thats melted from someone else's attempted repair..
D205 is testing good and i also replaced it still get no voltage on pin 4 of the opamps
Attachments
This amp may not have a negative supply. Try plugging a grounded signal source into the amp, Does that make a difference?
Plugging in a grounded signal source drops the voltage to 0.02 volts on pin 4 ..
Relay still doesn't engage
Relay still doesn't engage
Q502,Q503 both collectors connect to the low side of the relay coil I replaced both of them relay still doesn't engage
If there is a PNP transistor with its emitter connected to the base of one of those transistors, pull it. Does the relay engage?
Got this amp back ..
The guy said when a song hits a low bass note the fuse on the amp
Will blow and after the amp has been playing awhile
It will lose output 1 min it will be loud and the next the output is cut in half ..
Any ideas what might cause this ?
I'm just trying to get a few of these finished up so I can take a break from repairs for lil bit and work on my house remodeling it
The guy said when a song hits a low bass note the fuse on the amp
Will blow and after the amp has been playing awhile
It will lose output 1 min it will be loud and the next the output is cut in half ..
Any ideas what might cause this ?
I'm just trying to get a few of these finished up so I can take a break from repairs for lil bit and work on my house remodeling it
An intermittent input signal could cause the level to change. It could also be an intermittent connection to a speaker. Can you replicate the problem on the bench?
Is the fuse the correct size? Was the same size fuse holding before the amp was repaired?
Is the fuse the correct size? Was the same size fuse holding before the amp was repaired?
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