Users may not create topics, posts, or private messages containing or relating to the following material (especially pertaining to Motorola copyrighted software, unless you want Motorola to come along and shut this site down):

  • Listing for sale or trade of, or links to sites offering for sale or trade of, or giving away, Radio
    Service Software (RSS) or Customer Programming Software (CPS)
  • Profanity, pornography, defamation, or slanderous remarks directed towards any individual or entity
  • Commercial advertising (except in the Batboard Vendors forum, as approved by the Admin/Mod Staff)
  • Any other items which may be deemed as offensive

If any topics, posts, or private messages containing or relating to the aforementioned material are brought to the attention of the Admin/Mod Staff, they will be deleted.

Additional FAQ items appear here in Forum Rules. Please review them for posting guidelines and further clarification.

Looking for GM900 / MCS2000 service manual/schematic/PCB layout

The General forum is where users can discuss any topic regarding Motorola communications equipment - hardware, software, etc. There are also several focused forums on this board, so please take the time to ensure that your questions doesn't fall into one of those categories before posting here!

Moderator: Queue Moderator

New User
Posts: 19
Joined: Tue Jun 30, 2015 12:00 pm

Looking for GM900 / MCS2000 service manual/schematic/PCB layout

Postby codefoxed » Sun Mar 12, 2017 4:14 pm

Hi folks,

Does anyone have a service manual which contains a parts list, circuit diagram and PCB layout for the last revision of the 10W UHF Closed Architecture Controller Board in a GM900?

The PCB carries identifying part numbers 05574X11, 258Y02 0, 8905566X04 A, 8905567X06 A, 8905568X05 0, 8905569X05 0, 8905570X03 0. On a label, it has the barcode UL1C-083244. It seems to have been built around 1996 based on the component date codes; the serial number bears this out (April 1996).

I have a schematic and layout for HUE4015B "PCB 8405574X07-T6", but this radio seems to differ in several key areas. I suspect it's a later board revision.

I suspect MCS2000 10W UHF may be similar -- there may even be a schematic or PCB layout in one of the MCS2000 manuals or updates.

I'm trying to track down an issue where the radio CPU locks up after being programmed with CPS. The Zeners on the accessory port test good, as do the transistors I've been able to test (some don't match my parts list).

I'd also be very grateful for a cross-reference from Motorola part numbers to semiconductor manufacturer / part number if such a thing exists. Finding pinouts for the transistors has been a case of trial and error, and I'm not 100% certain if I'm right about what these parts are.


Return to “General Motorola Solutions & Legacy Radio Discussion”

Who is online

Users browsing this forum: No registered users and 18 guests