Schematic of the SMP-4004C (Image link fixed!)

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KF4SQB
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Schematic of the SMP-4004C (Image link fixed!)

Post by KF4SQB » Thu Aug 25, 2005 12:35 am

For anyone who might need it, here is the (rare?) schematic of the Maxon SMP-4004C programming adapter, used with the Maxon SM-4150 and SM-4450 mobile radios. This adapter may also be compatible with the GE Monogram series of radios, using the software for the Monogram.

Image


Some versions of this adapter had a "red wire" that was hooked to a pin on the main board of the radio to supply power to the adapter. This version appears to have a jack on it to hook a 'wall-wart' power supply to it.

All device numbers in the schematic are surface mount devices, as the factory unit was mounted inside a 25 pin D-sub shell. It shouldn't be a problem to find devices with the same specs in a standard 'thru-hole' package, if needed.

In order to solve some apparent confusion, the DB25F connector at "P1" in the schematic is for a serial (COM) port, not a parrallel port. A nine-pin plug could be used just as easily as a 25-pin. I will add the correct pin numbers for use with a nine-pin plug if needed.

BTW, this is a 'genuine' Maxon schematic, not an untried knock-off. This is what is actually inside the original Maxon adapter.
Last edited by KF4SQB on Sun May 31, 2009 2:54 pm, edited 2 times in total.
Brett Kitchens
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Of all the things I've lost, it's my mind I miss the most.......

ft2400
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Post by ft2400 » Sat May 06, 2006 6:10 pm

Hello there , here were a live is difficul get a IC MAX236 to build a CABLE .... than ...
1 - I used the software SMP-4004c to program frequencies in the new created file named TEST.CHN
2 - I poll off the eeprom 93c56 and used my Willem Eeprom programmer to write the 93c56 directly with this created file test.chn , however , message when I turn on the radio 01 Er .. and BIP, BIP, BIP , ...

Ask. Can't I write the created file directly to the eeprom 93c56 with my eeprom willem programmer ?

Thanks !!!
HY

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KF4SQB
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Post by KF4SQB » Mon May 08, 2006 12:10 pm

While I'm sure that could be done, you would have to know exactly what portion of the EEPROM contains the info that you need to overwrite. You've just possibly overwritten parts of the EEPROM that shouldn't have been overwritten. I'm not that familiar with Maxon, but it may be time to find a repacement EEPROM from Maxon.
Brett Kitchens
KF4SQB

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Of all the things I've lost, it's my mind I miss the most.......

GI0BJH
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Maxon SMP4002 Programming lead

Post by GI0BJH » Fri Sep 22, 2006 2:56 pm

Have you got any info on the Maxon SMP4002 Programming lead or the circuit on how to make the 25 way D socket adapter / lead. I tried your email as listed on qrz.com but you appear to have changed email address.
73 de Jim gi0bjh@ntlworld.com
Require help to obtain or make the Maxon SMP2002 Programming lead. I have a number of Lowband PM150's that have selcall boards futted. I need to switch off the selcall & C.T.C.S.S.

dywtw
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Re: Schematic of the SMP-4004C

Post by dywtw » Thu Jun 14, 2007 2:03 am

KF4SQB wrote:For anyone who might need it, here is the (rare?) schematic of the Maxon SMP-4004C programming adapter, used with the Maxon SM-4150 and SM-4450 mobile radios. This adapter may also be compatible with the GE Monogram series of radios, using the software for the Monogram.
I sent an email to the wetsnet address in the post with a request for a copy of the schematic...I figured I'd post here just in case you don't receive email at that address anymore. If that's a bad address for you, if you let me know here I will PM you...Thanks!!

GI0BJH
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Location: Northern Ireland

Re: Schematic of the SMP-4004C

Post by GI0BJH » Thu Jun 14, 2007 5:51 pm

dywtw wrote:
KF4SQB wrote:For anyone who might need it, here is the (rare?) schematic of the Maxon SMP-4004C programming adapter, used with the Maxon SM-4150 and SM-4450 mobile radios. This adapter may also be compatible with the GE Monogram series of radios, using the software for the Monogram.
I sent an email to the wetsnet address in the post with a request for a copy of the schematic...I figured I'd post here just in case you don't receive email at that address anymore. If that's a bad address for you, if you let me know here I will PM you...Thanks!!
All help via gi0bjh@ntlworld.com
Require help to obtain or make the Maxon SMP2002 Programming lead. I have a number of Lowband PM150's that have selcall boards futted. I need to switch off the selcall & C.T.C.S.S.

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KF4SQB
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Re: Schematic of the SMP-4004C

Post by KF4SQB » Sun May 31, 2009 2:53 pm

Image link fixed (finally)!
Brett Kitchens
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kf4sqb "at" wetsnet "dot" com

Of all the things I've lost, it's my mind I miss the most.......

User avatar
KF4SQB
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Re: Schematic of the SMP-4004C (Image link fixed!)

Post by KF4SQB » Mon Mar 05, 2012 6:29 pm

I don't know if the schematic shows up for everyone else like it does for me or not (part of it cut off), but if it does, just right click on it, and select "View Image" to see the whole thing.
Brett Kitchens
KF4SQB

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Of all the things I've lost, it's my mind I miss the most.......

Elfnetdesigns
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Re: Schematic of the SMP-4004C (Image link fixed!)

Post by Elfnetdesigns » Mon Jul 21, 2014 5:18 pm

I have a question about the diagram posted. On the original Maxon SPC-4000 serial programming cable there is a red +5 vdc bus wire coming out of the end of the cable at the radio connector, This wire connects to pin 1 on the option / audio header (J-12) in the rear of the radio. I know this is to supply the circuit in the programming cable 5 volts but what I can't work out is where does this wire connect inside the programmer? If anyone can tell me where it goes inside the db25 sub-d area Please let me know ASAP


Also the SPC-4000 Programming cable for Maxon 2150/4450 also works on the GE Monogram mobiles.
To program these radios you remove the top cover, unplug the option / audio board @ J-12. Plug in the programming cable and connect the red wire to pin 1 on J-12. Connect power to the radio and hold down the "P"button while turning on. The radio should display PrOg. on the display.
Read and write your channels and when done make sure you replace the little option / audio board.


Thank You

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