M Mike P Member Joined 2012 2021-04-16 9:01 am #1 2021-04-16 9:01 am #1 Can anyone here help me identify where to pick up the RF eye pattern on a Marantz CD84/74? I can't find anything in the service manual. lcsaszar Member Joined 2004 2021-04-16 9:24 am #2 2021-04-16 9:24 am #2 It was a long, long time ago that I built in a monitoring connector on the rear side of the player for viewing the eye pattern on an oscilloscope while playing. I used the test point visible on the attached picture. Attachments 20210416_101656.jpg 741.5 KB · Views: 102 M Mike P Member Joined 2012 2021-04-16 11:24 am #3 2021-04-16 11:24 am #3 That's very helpful, thank you.🙂 lcsaszar Member Joined 2004 2021-04-16 12:30 pm #4 2021-04-16 12:30 pm #4 It is the J501 connector on the component side. Attachments J501.jpg 985.1 KB · Views: 96 M Mike P Member Joined 2012 2021-04-16 10:16 pm #5 2021-04-16 10:16 pm #5 Thanks again. I managed to have a look at the eye pattern on my CD84 and unfortunately I think it is suggesting that the laser diode is getting weak. Luckily I have a couple of Philips CD104 donor machines stashed away for me to take a laser mech from. You must log in or register to reply here. Share: Facebook X (Twitter) LinkedIn Reddit Pinterest Tumblr WhatsApp Email Link
Can anyone here help me identify where to pick up the RF eye pattern on a Marantz CD84/74? I can't find anything in the service manual.
lcsaszar Member Joined 2004 2021-04-16 9:24 am #2 2021-04-16 9:24 am #2 It was a long, long time ago that I built in a monitoring connector on the rear side of the player for viewing the eye pattern on an oscilloscope while playing. I used the test point visible on the attached picture. Attachments 20210416_101656.jpg 741.5 KB · Views: 102 M Mike P Member Joined 2012 2021-04-16 11:24 am #3 2021-04-16 11:24 am #3 That's very helpful, thank you.🙂 lcsaszar Member Joined 2004 2021-04-16 12:30 pm #4 2021-04-16 12:30 pm #4 It is the J501 connector on the component side. Attachments J501.jpg 985.1 KB · Views: 96 M Mike P Member Joined 2012 2021-04-16 10:16 pm #5 2021-04-16 10:16 pm #5 Thanks again. I managed to have a look at the eye pattern on my CD84 and unfortunately I think it is suggesting that the laser diode is getting weak. Luckily I have a couple of Philips CD104 donor machines stashed away for me to take a laser mech from. You must log in or register to reply here. Share: Facebook X (Twitter) LinkedIn Reddit Pinterest Tumblr WhatsApp Email Link
It was a long, long time ago that I built in a monitoring connector on the rear side of the player for viewing the eye pattern on an oscilloscope while playing. I used the test point visible on the attached picture.
M Mike P Member Joined 2012 2021-04-16 11:24 am #3 2021-04-16 11:24 am #3 That's very helpful, thank you.🙂 lcsaszar Member Joined 2004 2021-04-16 12:30 pm #4 2021-04-16 12:30 pm #4 It is the J501 connector on the component side. Attachments J501.jpg 985.1 KB · Views: 96 M Mike P Member Joined 2012 2021-04-16 10:16 pm #5 2021-04-16 10:16 pm #5 Thanks again. I managed to have a look at the eye pattern on my CD84 and unfortunately I think it is suggesting that the laser diode is getting weak. Luckily I have a couple of Philips CD104 donor machines stashed away for me to take a laser mech from. You must log in or register to reply here. Share: Facebook X (Twitter) LinkedIn Reddit Pinterest Tumblr WhatsApp Email Link
lcsaszar Member Joined 2004 2021-04-16 12:30 pm #4 2021-04-16 12:30 pm #4 It is the J501 connector on the component side. Attachments J501.jpg 985.1 KB · Views: 96 M Mike P Member Joined 2012 2021-04-16 10:16 pm #5 2021-04-16 10:16 pm #5 Thanks again. I managed to have a look at the eye pattern on my CD84 and unfortunately I think it is suggesting that the laser diode is getting weak. Luckily I have a couple of Philips CD104 donor machines stashed away for me to take a laser mech from. You must log in or register to reply here.
M Mike P Member Joined 2012 2021-04-16 10:16 pm #5 2021-04-16 10:16 pm #5 Thanks again. I managed to have a look at the eye pattern on my CD84 and unfortunately I think it is suggesting that the laser diode is getting weak. Luckily I have a couple of Philips CD104 donor machines stashed away for me to take a laser mech from.
Thanks again. I managed to have a look at the eye pattern on my CD84 and unfortunately I think it is suggesting that the laser diode is getting weak. Luckily I have a couple of Philips CD104 donor machines stashed away for me to take a laser mech from.
