American bass sq3000 - help finding parts

[imraneesa]

Dear all,
I got this amp for repair. It is missing two diodes on the board. If anybody can help me with the details will be very helpful. I want to know what is D305 and D306. Picture attached.

 

[Perry Babin]

Why can't you read the numbers on the remaining rectifiers?

 

[imraneesa]

Hello Sir,

It don't have any number on the diodes except a yellow band.

 

[Perry Babin]

wipe some heatsink compound on/off the face of the rectifiers.

 

[imraneesa]

The diode is just like a glass. I applied some white compound and then tried to see after rubbing it little bit. But that have no number. I am attaching the picture of diode.

 

[Perry Babin]

I'm sorry. I misread. I think that they're likely 1n4148 type diodes. The the striped ends connect together?

 

[imraneesa]

No problem. Yes sir they are connected together at striped ends. Thank you very much. Also two resistors R246R and R246L missing also.

 

[Perry Babin]

Photo?

 

[imraneesa]

Picture attached.

 

[imraneesa]

Bump

 

[Perry Babin]

I can't tell from that. What are the big traces?

 

[imraneesa]

The big traces are speaker right and left outputs.

 

[Perry Babin]

The resistors could be part of the RC zobel network. If so, the resistor will connect to one of the caps and the other side of the cap to the other speaker terminal (or secondary ground) for each channel. The resistors would likely be about 4.7 ohms.