1982 Clarion DATSUN RN-437H 720 Stereo, no sound. Part # 285-0983-00

[Goemon]

The 2, 4Ω speakers I am using work, all leads have been tested for continuity.
All connectors have been tested.
The light comes on, there is no sound.
I put an analog meter on the speaker tabs while in on & off positions since it's push button on/off on the left knob.
Turned up to full volume and no reaction from the meter.....do I have a faulty amp/power supply ?
I haven't found any loose wires inside to or from the power supply or amp. I see no signs of burning or any smell of such.
I did have to change the bad Toshiba bulb. I cleaned out the power/speaker tab plate with zero residue  contact cleaner.
Does anyone know if it can be fixed? Is there a common problem with these units?
I have seen a few non working ones out there for sale,I am wondering if it's the same problem.
I have reached my diagnostic limits, nothing on the net or You Tube I could find on this stereo
Thanks

[Stinky]

I have no idea.  But, it sounds like you are on the right track to verify that that unit is terminal.

[Goemon]

Thanks

 

[Goemon]

This time I was setting it up again when I connected the speaker ground/common, there was a pop in the speaker then nothing.
No power was running to the unit at this point, but the positive was connected to the speaker.
All other audio wires were connected but not making a circuit until I connected the common.
I assume this was a Capacitor discharging so that might mean it's in the amp.....?????

[MikeRL411]

I have 2 receivers with the same symptom.  Probably a failed capacitor.   Turn on, maybe hum and very low audio followed by pop and silence.  Got 30 t0 20 years service out of them so no real bitching.

[thisismatt]

Fair chance that some/all electrolytic capacitors in it are bad at this point. Potentiometers could also be so oxidized that they're making no contact...

[Goemon]

I should be able to tell if it is a Potentiometer with a continuity test correct..?

 

[Goemon]

Since there is no power going to the speakers it would have to be the volume pot....???

 

[thisismatt]

I would test resistance (ohms) to see if there was any change. There are likely other pots on the board as well, but some may be associated with radio frequency tuning

[Goemon]

I'm not even getting static & no noticeable power coming from the speaker prongs on back

[Goemon]

Is there any info out there on how to wire a 
Clarion RF-1621 AM radio? I gave up on Google.

6 spade connectors, the bottom 2 are ground, continuity to the case.
The hand drawn diagram I got with one says the top left is 12v, top right is speaker.
The drawing shows a  wire going from left middle to right middle & lamp in the middle which makes no sense.
The symbols of the schematic are not drawn good there.

I suppose one of the grounds are for the speaker? Other Ground for power...?
It's been a long time since I messed with a radio

Thanks

[Goemon]

[Goemon]

Similar to the first stereo , the light wire goes to the light switch
and the other goes to the dimmer


https://www.youtube.com/watch?v=ricxo7E_2jw




 

[Goemon]

I made one good Clarion Datsun AM / FM unit from 2 like ones.
This one picked up stations better and all the pushbuttons worked.
A swap of the switch & picking out the best parts got me a nice one !!
I used the diagram to make up a DIN connector to
have the Stereo functional or the MP3 functional. .....the damn camera is chirping. The switch for the radio only works when it is switched to radio mode
 

[Goemon]

5 pin DIN on the left
Not the same unit that I fixed