First, was the plater on when you tried this? If not, try it with? If that does not work, try pressing Stop instead of >>- what happens?
Thank you to our Sponsors
Beogram 4000 and also BG8002
116 replies
......
Mark
This morning I have performed the same test with the platter in place....same results, pressing STOP instead of >> has no effect, the carriage remains stationary 2cm from its start point, the platter continues to rotate until I manually drive the carriage back to the start position upon which everything closes in the normal way.
Craig
This morning I have performed the same test with the platter in place....same results, pressing STOP instead of >> has no effect, the carriage remains stationary 2cm from its start point, the platter continues to rotate until I manually drive the carriage back to the start position upon which everything closes in the normal way.
Craig
Further to the above I am measuring 1.24vdc at pin 7 of plug P2 (IR Diode power supply) which would indicate that the diode is fine...will hook up my scope and see if i'm getting the required pulse's from the pins 4 & 6 of plug P2
When I measure the voltage at pins 4 and 6 of plug P2 and turn the encoder wheel by hand I measure between 14.3vdc and 0,7vdc suggesting that the photo diodes are functioning correctly...however the measurement at the input to uIC1 taken at R10 &R11 respectively only returns 0-2,9vdc as I rotate the encoder wheel by hand....I suspect this is low and should be nearer 0-5vdc?
Craig
Craig
Right......measured the voltage signals above at R10 & R11 on the Beogram that is functioning normally, drive belt removed to enable the encoder wheel to be turned by hand, and the voltages measured are the same...0-2.9vdc so its looking very like the encoder circuit is working fine?
Craig
Craig
is there a problem with the site today? can't seem to post pictures?
Ok.....gone to full service position now!
And if I'm not mistaken someone has carried out a full recap too...
Happy with the encoder signals from the drive carriage im looking at the forward/Reverse Scanning Sensors (Control Panel LDRs)..
not the best image i know, existing wisdom tells that if the voltage goes high at either P5 pins 4 or 6 a high signal will be fed to I1C pin 31 thus disabling the pick up arm after approx 2cm travel.....just what I'm getting
Removed the cover from the lightbox and with a meter checked continuity across the lamp....all good, checked the resistance of the LDR's with the light from my desk lamp on and got the following readings...not the same but they should be ok?
......
Please Log In to Reply
You must be logged in as a BeoWorld member to post replies to forum threads.
or
Join BeoWorld
Register to access the forums, reference material, and exclusive member benefits — including our monthly prize draw.
Become a Member