hifi engine

HK 715 Receiver issue

Folks, I've just found this site and have been surfing! I found a schematic for my receiver, but thought I might run this one buy you before I get back into component level troubleshooting.

ISSUE: the receiver only picks up stations on the lower end of the spectrum for both AM and FM. When I looked at the schematic it looks like I should start by looking at the voltages on the IC's that share the FM/AM processing?

Thanks Kraig



Re: HK 715 Receiver issue

BAM! ben2009, you hit the nail on the head. I found Q301 had no output. Thanks for the feedback. So, is there a source you folks use for parts? It looks like the transistor is an FM voltage regulator part # 2SA773 (K).

Re: HK 715 Receiver issue

Oops, I'm using receiver, but of course it is a tuner. Sorry.

Re: HK 715 Receiver issue

Could be a power supply problem; one of the regulators could be bad.

Re: HK 715 Receiver issue

Check the voltages in the tuner circuit, it could be one of the transistor in the tuner circuit is going weak and need to replaced.