Timing.Fanatic Publish time 2019-05-17 17:54:41

D-321 no sound on left headphone channel

Edited by Timing.Fanatic at 2019-05-17 17:56

Hi,

I've recently picked up a D-321 and there is no sound on the left headphone channel.Beeps sound good on both channels though.Looking at the SMs found on this site (thanks!) it looks like I should consider replacing C106?

Here are some other observables:
- Line out works well

- AVLS in OFF position produces almost no sound
- Moving the AVLS switch from OFF -> 2 produces a slight bit of sound on the left channel
- AVLS positions appear to work all right on right channel depending on volume level


Thoughts?I don't have a oscilloscope (only DMM).

Thanks.



reent Publish time 2019-05-17 19:47:08

1 clean avls swch s301and vol potentiometer rv301
2 replace c106 c206， ud better replace all the white capacitor

reent Publish time 2019-05-17 20:07:39

replace amp chip with la4534,its much better than 4533:lol

Timing.Fanatic Publish time 2019-05-21 01:27:58

Thanks!I'll go ahead and change out those capacitors!

I'll also look into the LA4534 - that may be a secondary project after I get the headphone stuff working! :)

Timing.Fanatic Publish time 2019-10-21 15:40:20

So I am finally getting around to doing this.I'm not electronics savvy but I understand that in most cases one should not replace capacitors with a different capacitance than specified, but in this application, can I replace the two 330uF 2V caps. with 470uF 6.3V caps?

I don't have a Al. Elect. 330uF with the appropriate dimensions on hand, while the 470uF will fit.
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