Image Map Image Map
Page 1 of 2 12 LastLast
Results 1 to 10 of 11

Thread: Model 1 monitor power cable colour code

  1. #1
    Join Date
    Nov 2017
    Location
    UK, South East
    Posts
    358
    Blog Entries
    1

    Default Model 1 monitor power cable colour code

    Folks,

    I acquired a Model 1 with monitor (European 240V model) and the plug has been cut off the monitor power cable.

    Cable colours are red, black and grey - anyone know how this maps to modern UK power cable coding (Brown(live) , Blue(neutral) and green/yellow(earth))

    Thanks

  2. #2
    Join Date
    Aug 2013
    Location
    Philadelphia,PA area
    Posts
    115

    Default

    That sounds more like the Video cable: Red - +5V, Black - Ground and Grey - Video. Does the UK monitor have a detachable power cord?

    Tom

  3. #3
    Join Date
    Nov 2017
    Location
    UK, South East
    Posts
    358
    Blog Entries
    1

    Default

    Ah, so does the power for the monitor come from the DIN connector attached to the TRS base unit then ?
    It looked like a power cable as its rather thick flex and I can understand someone cutting that off - rather than a video connector.

  4. #4
    Join Date
    Mar 2013
    Location
    Chaffee, MO
    Posts
    1,338

    Default

    zippysticks,
    If I remember correctly the Video cable comes out the bottom front of the Monitor, and the AC Line
    Plug comes out the back of the Chassis. It's actually a RCA Television Chassis with the Tuner
    removed. I finally found my SAMS 1713 Photofacts for the RCA Chassis KCS203A/D, and have
    it scanned, with TIF's and a PDF built. The Tuner section of the SAMS Photofacts doesn't apply
    since the Monitor doesn't have a Tuner.

    The US Plug is Polarized and the LINE goes directly to the Fuse and then Power Switch. The
    I'm not sure about the EU version.

    Larry
    Last edited by ldkraemer; November 3rd, 2019 at 07:37 AM. Reason: added RCA Chassis Info

  5. #5
    Join Date
    Nov 2017
    Location
    UK, South East
    Posts
    358
    Blog Entries
    1

    Default

    Hi Larry - this is the monitor in question.
    Both cables emerge from the bottom rear of the unit. Cable in question is on the right - thick three core flex with red, black and white cores.

    Thin cable on the left has a 5 pin DIN connector. Note the three other connectors in the centre of the monitor.


    IMG_20191103_164838091.jpg
    Last edited by zippysticks; November 3rd, 2019 at 09:21 AM.

  6. #6
    Join Date
    Jun 2015
    Location
    Sioux Falls SD
    Posts
    364

    Default

    Can you post a photo? I don't think the 220V European monitors were the converted RCA monitors in the US.

  7. #7
    Join Date
    Nov 2017
    Location
    UK, South East
    Posts
    358
    Blog Entries
    1

    Default

    Quote Originally Posted by lafos View Post
    Can you post a photo? I don't think the 220V European monitors were the converted RCA monitors in the US.
    Yikes - forgot it from previous post. Now corrected.

  8. #8
    Join Date
    Jun 2015
    Location
    Sioux Falls SD
    Posts
    364

    Default

    The DIN connector is definitely to connect to the TRS-80. I don't have the info for the 240V power on the monitor. You can try to contact Ian. He has a lot of knowledge on TRS-80 including the 240V components. He's often on this forum, or you can contact him through his web page:

    http://members.iinet.net.au/~ianmav/trs80/

    I advise caution. If someone cut the power connector off the cord, there might be something wrong inside. Have you opened it for a visual inspection?

  9. #9
    Join Date
    Nov 2017
    Location
    UK, South East
    Posts
    358
    Blog Entries
    1

    Default

    Well, here is my answer - what a mess.

    The incoming power cable goes to a junction board/fuse holder that subsequently feed the rear three power sockets on the monitor (none of which go through the fuse).

    Grey connects to a yellow/green earth cable and doesn't not actually go anywhere other than the 3 sockets - so there is no chassis earth in the monitor.
    Red goes through the fuse and off to the transformer primary white wire. It also connects to the blue (usually neutral) wire of the three sockets.
    Black connects to the brown wire of the sockets (usually live in UK parlance) and also off to the transformer primary grey wire.

    So my conclusion is :

    Grey - earth
    Red - fused neutral
    Black - live

    TRS80_Monitor_Power.jpg

  10. #10
    Join Date
    Nov 2017
    Location
    UK, South East
    Posts
    358
    Blog Entries
    1

    Default

    Seems to work although the Model 1 seems to have some issues.....

    Monitor1.jpg

    Monitor2.jpg

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •