Mooly, you're a saint. Tested motor and no go. I have a new laser coming and that will have the motor in it. I will let you know when I fit it. I have fitted loads of these lasers in cd63/67s and have never kept the perfectly working motors. That's how it goes!! Thank you for all your time and patience. You have been a godsend. Regards Barry
All the time the meter is showing 2.5volts between pins 9 and 12 means the sled should be trying to turn. Zero volts across the motor at all other times is correct.
You are measuring between pins 9 and 12 on the IC 7401... yes
and those pins go to motor marked "sledge". So it should be turning. If it's not it's either jammed pretty solid or the motor is suspect.
Even an old AVO8 on ohms x1 range will actually turn the sled motor in situ (just about), that's how liitle current and voltage is needed on these things so 2.5 volts and it should be doing 100mph.
Providing the diagram is correct all your readings point to the motor etc, so carefully recheck and make sure. If you can confirm that there is voltage across that sled motor and there is no sign of it turning then it has to be either faulty or jammed. Make sure there is continuity from the IC to the motor... no broken wires etc.
You are measuring between pins 9 and 12 on the IC 7401... yes
and those pins go to motor marked "sledge". So it should be turning. If it's not it's either jammed pretty solid or the motor is suspect.Even an old AVO8 on ohms x1 range will actually turn the sled motor in situ (just about), that's how liitle current and voltage is needed on these things so 2.5 volts and it should be doing 100mph.
Providing the diagram is correct all your readings point to the motor etc, so carefully recheck and make sure. If you can confirm that there is voltage across that sled motor and there is no sign of it turning then it has to be either faulty or jammed. Make sure there is continuity from the IC to the motor... no broken wires etc.
I have a question here: cd 6000ose worked good for 2 years since mods done and the last couple days I become error 11 and error 7.
I swapped the drive and no change. When I press the 4-wire drive connector towards the board as if I wanted to plug it in again it works fine.
I guess that I have a bad soldering point or something but where should I look for it?
I swapped the drive and no change. When I press the 4-wire drive connector towards the board as if I wanted to plug it in again it works fine.
I guess that I have a bad soldering point or something but where should I look for it?
Hi Billman, This is quite a common problem with Marantz connectors. (especially if you have removed them a few times). You have to remove the PCB and resolder the connector socket. Just a quick touch with solder otherwise the track may lift or crack. It may allready be cracked, therefore a piece of wire could be needed to jump it.
Barry
Barry
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