SS9900 DC LOW?

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del6600
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SS9900 DC LOW?

Post by del6600 » 12 Aug 2019, 08:12

Hi,
I have a SS9900 radio.
When I switch on and call out all I am getting is "DC LOW"
I have tested the 13.8v 20A psu, that's ok.
To confirm this I took the radio out to my car and plugged it in
with the same result. I re-flashed the radio with the original
software it came with 16 months ago. Same problem?

Anyone any ideas what the problem is?

Hopeful

del
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del6600
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Re: SS9900 DC LOW?

Post by del6600 » 12 Aug 2019, 08:48

Hi,
I have a SS9900 radio.
When I switch on and call out all I am getting is "DC LOW"
I have tested the 13.8v 20A psu, that's ok.
To confirm this I took the radio out to my car and plugged it in
with the same result. I re-flashed the radio with the original
software it came with 16 months ago. Same problem?

Anyone any ideas what the problem is?

Hopeful

del


I have just adjusted the voltage settings now 14v > 9v was 14v >12v

When I key the mic now all I get is a black screen, when I release the key I get a beep.

Beeps and roger beeps have been turned off.

I am beginning to wonder if the TIP36C PNP Power Transistor or the 4 13N10 finals have gone?
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Re: SS9900 DC LOW?

Post by 13EL121 » 14 Aug 2019, 05:24

Yes, check voltage regulator and finals at first. Sometimes they burn through due bad cooling design.

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