RCA BA-31A Output Signal Turned Off After 2 Seconds...

GroupDIY Audio Forum

Help Support GroupDIY Audio Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

smilan

Well-known member
Joined
May 29, 2017
Messages
463
Hi, I have here a RCA BA-31A for repair. I received it with the original caps that many of them was blown. I replaced all the electrolytics and all the resistor that was far away from their rated value.
When I turn on the preamp there's a output signal for about 2 seconds and then there is no signal.
I tested all the transistors with a simple LCR meter and all of them tested good.
Attached schematics, how can I troubleshoot this issue?
 

Attachments

  • 290358089_1352640585227149_67567013397534484_n.jpg
    290358089_1352640585227149_67567013397534484_n.jpg
    41.4 KB · Views: 20
  • 290424164_372979021590324_4508107666438289951_n.jpg
    290424164_372979021590324_4508107666438289951_n.jpg
    98 KB · Views: 20
  • RCA BA-31A.jpg
    RCA BA-31A.jpg
    141.3 KB · Views: 21
Last edited:

Latest posts

Back
Top