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Quantar doesn't want to play nice.

speaker-mic

Member
Joined
Jan 17, 2025
Messages
7
Ive looked over the posted info and have hit a brick wall. This unit does not have a wire line board and was part of a larger system prior to being decommissioned [ch4 of 8]. It was a trunked channel as shown by a pl of 76.60. Here is the issue. It does connect to RSS but gives 2 distinct error codes: [1]"Connected Device Error: No Response From Device. Check Serial Cable or Modem Connection." [2]"Error No.20 Possible PC Hardware Error. Cannot Write To Serial Port."

No matter what computer is used, RSS Version, and Win OS, its the same result. The cable is a standard Null Modem, i.e.: 2-3, 3-2, 5-5, 7-8. 8-7 5 wire configuration.

Other than that, it powers up, self checks, and goes into a status where the Tx Lock light and Station On lights are on. The Station Fail and PSC Link lights alternate.

There are no emissions, this was confirmed by a frequency counter. It is not transmitting a control channel either. When tested with a meter and run into a dummy load, everything works with regard to the transmit section on a manual PTT.


It cant even have a codeplug dumped into it as it gives the same error messages.

That said, any help would be great.
 

prcguy

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Messages
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So Cal - Richardson, TX - Tewksbury, MA
Sounds like a problem with the Station Control Module and maybe with the eeprom that holds the programming and cal info. I had a quantar that worked fine but would not read or write and I replaced the eeprom, built up a new personality from scratch and a complete cal and its fine now. I also once swapped SCMs between Quantars and instead of building up a new personality on the info read from the SCM I uploaded another personality which seemed to brick the SCM where it would not read or write, plus it was stuck with an 800MHz personality in a VHF repeater. Swapping the eeprom and building up a new personality from scratch fixed that one.

Do a search on Quantar SCM and eeprom and you should find discussion on what the P/N is and where its located on the board. Its a plug in device and I got a few off eBay cheap.
 

N4KVL

ÆS 1024
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Oct 4, 2006
Messages
107
Location
South FL
+1 on the eeprom. Cheap and easy to check.

What version SCM is it? If it's an EPIC IV (CLN7692), these only work for SZ trunking and have their own CSS to talk to them.
 

speaker-mic

Member
Joined
Jan 17, 2025
Messages
7
+1 on the eeprom. Cheap and easy to check.

What version SCM is it? If it's an EPIC IV (CLN7692), these only work for SZ trunking and have their own CSS to talk to them.
Where do I find that? I read about the EPIC types but it was lost on me.
 

speaker-mic

Member
Joined
Jan 17, 2025
Messages
7
Find the part # on the board then look here for what version it is and what it does.

I found nothing relating to the part #:CLN8730A. there is no removable parts. there is also another sticker with CLN8767A and one with CLN8778A. I did find one like mine on EBAY with this description of it:

Motorola Quantar Fru Epic 6 Control Module DLN1229A or CLN7692F/CLN8768A​

Looks just like mine.
 

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prcguy

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I found nothing relating to the part #:CLN8730A. there is no removable parts. there is also another sticker with CLN8767A and one with CLN8778A. I did find one like mine on EBAY with this description of it:

Motorola Quantar Fru Epic 6 Control Module DLN1229A or CLN7692F/CLN8768A​

Looks just like mine.
I've had my hands on about 20 SCMs and have never seen one like that.
 

speaker-mic

Member
Joined
Jan 17, 2025
Messages
7
I've had my hands on about 20 SCMs and have never seen one like that.
Figures. It doesn't have the removable chips and there's no place for a wire line to connect. Looks like this may be a dead project..... Whats odd is most Ive seen have RSS marked for the DB9. This has CSS. The 4 buttons, from top to bottom have Local PTT, Disable, [BLANK]. Shift. Everything else looks typical.
 

speaker-mic

Member
Joined
Jan 17, 2025
Messages
7
Tried a new cable. Now it gives "Wrong Prompt Received" error. I'm really getting ready to toss this thing!!
 
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