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Old 23rd May 2004, 08:41 PM   #11
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Default SAA7210 and SAA 7220

I'll try that tomorrow and see what happens. I'll probably desolder the pin on the 7220 and jumper the clock to the 7210. I know that the 7220 supplies the clock to the7210 and the 7210 sends it back to the filter, so I gues we'll see.

PH
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Old 24th May 2004, 08:38 PM   #12
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Default disk spins problem

No luck on the bypass to the 7210 for the clock. Disk still spins at max speed. I replaced the 7210 and that didn't fix it either. With no schematics for the Rotel 855, progress on this is likely to be slow. All power supply rails appear to be working as advertised, as I took some measurements from a friends machine. Unfortunately I couldn't tear into it far enough to check the transistors and op amps under the transport...

Sugestions?

PH
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Old 25th May 2004, 09:23 PM   #13
TDA1540 is offline TDA1540  Netherlands
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I think you should check the supply around the killcircuit.
If something is amiss,it affects the processer(assuming the Rotel PCB is actually a Philipsdesign)
Have had some Philipsplayers on my table where the owners had messed with the killcircuit(mutingtransistors).They showed similar symptoms.(the players.....not the owners)

TDA
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