Mark, I have a manual for a 68P1056A35 MOTRAC C74MSY-3101AY and BY community repeater. It shows the BY uses a TLN1684A master decode. I didn't come forward before because I didn't see that number mentioned. part # TLN5803A is the kit number for the master decode board in a TLN1684A module.
Pin 24 on the card should be exciter gnd for the xmit pl level pot. If I can get a decent copy, I'll send you what I have. Gerald Pelnar WD0FYF McPherson, Ks ----- Original Message ----- From: "n9wys" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Sunday, September 21, 2008 11:04 AM Subject: RE: [Repeater-Builder] Update on the MICOR Community Repeater project > Eric, > > The original thread started 08/11... and (forgive me for the bandwidth > usage) I captured most of it here. I did take the liberty to edit out some > of the stuff I felt was "unimportant" or "non-productive". > > At one point in the build, I *thought* I had this problem resolved... but > apparently what was happening was the PL was bleeding through from the > receive to the transmitter. That is why I was able to "talk it off". > After > looking at the station operation with a service monitor, I am certain that > it is NOT encoding PL for transmit. I have no PL at Pin 2 of the Master > Decoder, which is what feeds the PL tone to the exciter/modulator. > > For everyone: At one point, Eric referred me to an eBay auction, listing > among other things a Master Decoder card of the same part number as the > ones > I have. Those cards were in an MSY chassis... which makes me wonder if > there is a fundamental difference on the MSY-version versus the > MICOR-version of this card. My examination of the card leads me to > believe > this is the case, I just need to verify this. > > Eric, the part number stamped on the backplane is: TRN6421A, and the > number > on the Master Decoder card is: TLN5803A > > Thanks everyone! > Mark - N9WYS / WQIV271 > > -----Copied Thread----- > From: [email protected] On Behalf Of n9wys > Sent: Monday, August 11, 2008 11:26 AM > > More information about this project. > > I have the station working - receiving, decoding proper PL tone, > repeating, > transmitting audio, etc. The only thing it is NOT doing is encoding tone > for transmit. (A reminder - this is a Community Repeater MICOR chassis, > NOT > the standard repeater chassis.) Anyway - from what I can tell, the Master > Control module is NOT sending tone out to the modulator. The problem I > have > is this: the manual supplement I have shows a different Master Control > module that what I have. My modules are not IC-based, the ones on the > manual are. Therefore, I believe the schematic and operation for the > module > I have is completely different than that in the manual. > > Does anyone have an earlier issue of the Community Repeater manual - > 68P81025E55 (probably revision A, since mine is a "B")? *ALL* I think I > need are the pages pertaining to the Master Control Module - part > #TLN5803A. > (Other part numbers may be: TLN8780A or TLN1684A - these are numbers > stamped on the flange of the card - the first number above was printed > right > on the circuit board.) The module referenced in my manual is TRN6165A. > > For those with a manual - I am seeing tone at Pin 7 ("Tone PL Out") but > not > at Pin 2 ("Tone or Binary PL to Modulator") on the Master Control module. > I > tried merely jumpering Pin 7 to Pin 2 - doesn't work. Because the > schematic > and board layout is completely different, I have no reference to be able > to > chase signal through the circuit. I'm also wondering if a required jumper > is missing or a jumper is improperly installed on my Master Control card. > > Thanks! > Mark - N9WYS > > From: [email protected] On Behalf Of Eric Lemmon > Sent: Tuesday, August 12, 2008 9:18 PM > > Mark, > > What is the number stamped in black ink directly on the PCB of the master > control module? I know you recently received the community repeater > manual, > and that manual doesn't contain the information on that module? Odd... > > 73, Eric Lemmon WB6FLY > > Eric, > > The Master Control module I have is: TLN5803A > > The module referenced in my manual is: TRN6165A. > > The manual's module is definitely a newer design - it is IC-based (two > chips > on the board). My modules are "pre-IC" -- no chips at all. I've also > seen > cover designs for (what I believe is) an earlier version of the Comm. > Rptr. > manual supplement, so there is at least one version prior to the one I > have... > > Mark - N9WYS > > From: [email protected] On Behalf Of Mark > Sent: Sunday, August 17, 2008 12:59 PM > > Before the last hiatus, I was attempting to find a schematic for a MICOR > Master Control module, part # TLN5803A. I still am in need of it. > > Does anybody have a first edition MICOR Community Repeater manual > supplement > that may have this schematic in it? My manual is a later issue, and > doesn't > not contain what I need. I would be greatly appreciative if someone could > locate this and scan it for me! > > This module schematic may also be in a MOTRAC manual, if that helps anyone > in locating this module for me. (I have found the module installed in a > MOTRAC repeater.) > > Thanks! > Mark - N9WYS > > From: n9wys [mailto:[EMAIL PROTECTED] > Sent: Tuesday, August 19, 2008 3:48 PM > > Everyone, today I tried contacting Motorola parts for a manual and/or > schematic for the Master Decoder module I have, Part #TLN5803A. > > Needless to say, navigating Motorola's call-handling system was a real > trip. > First I ended up with someone in "Cell Phones", then someone in > "Recreational Radio". I finally ended up with Don in "Commercial Radio"... > > Don put life and limb at risk by venturing into the old archives. > Unfortunately they no longer have any manuals available which refer to > this > module. :-( He WAS able to give me the manual numbers for the MICOR > manuals, but I already have them all. When I asked about the MSY-series > station manuals, he said those have been NLA since 1976 or so... > > So I'm here again to plead with those who have old libraries of Motorola > manuals -- PLEASE check your stash to see if you may have anything for the > MSY-series community repeater. (Possible model number C74MSY-3101BY or > similar - the "BY" is the key here, I think.) I have seen a older > MSY-series station on eBay with this card in the chassis, so hopefully > someone out there has the manual for it. > > I *REALLY* need this schematic to get my repeater going... > > Thanks, > Mark - N9WYS / WQIV271 > > > -----Original Message----- > From: [email protected] On Behalf Of Eric Lemmon > Sent: Saturday, September 20, 2008 11:48 PM > To: [email protected] > Subject: RE: [Repeater-Builder] Update on the MICOR Community Repeater > project > > Mark, > > I could not find the previous messages on your thread, so please restate > the > module numbers of the Master Decoder and Unified Chassis Backplane that > you > now have. Do all of the backplanes have the same number stamped in black > ink on them? The number I am referring to is the number stamped along one > edge of the PC board itself, not on sheet metal parts. > > 73, Eric Lemmon WB6FLY > > From: [email protected] On Behalf Of n9wys > Sent: Saturday, September 20, 2008 7:33 PM > > Well, I got this thing all reassembled and tuned up on the new frequency > pair. a fellow ham (who used to work for the local Motorola shop) came > over > with his service monitor and we tuned and tested the system. It is still > not passing PL to the transmitter. Some PL bleeds through from the > receive, > but I know that is not correct - nor is it of sufficient level. (I only > get > about 90 Hz of deviation with this PL.) > > We took a CLOSE look at the Master Decoder card itself and it appears to > be > configured VERY differently than the later version depicted in my manual. > For example, the later version card (based on two ICs) has no connection > on > Pin 24 to the backplane. My card (an earlier version with discrete > components) appears to have some sort of signal (audio) on Pin 24. So I > need desperately to find either the manual pages pertaining to my older > Master Decoder card, or I need a newer version card. If ANYONE has either > of these, I'd be much obliged of you would contact me. The issue HAS to > be > the Master Decoder card - it is not passing any PL to the exciter. The > problem is, I have about 8 of the same vintage Master Decoder card, so > changing them out is not resolving the issue. > > For the time being, I am going to put the machine on the air as-is. it > works > just fine, other than it will have to be CSQ receive for all users. I'll > decide later on whether I will put in a tone panel, or continue to operate > it as it is now. > > Mark - N9WYS / WQIV271 > > > > ------------------------------------ > > > > Yahoo! Groups Links > > > >
