|
|
Post by prime on Jun 6, 2021 11:40:17 GMT
Thanks i had my meter set too low, R502 is fine. on the opto board is the opto 501 not sure what this plastic piece does? the rest of the board seems ok.
|
|
|
|
Post by Ron Rich on Jun 6, 2021 13:38:12 GMT
Hi Peter,
"Opto" is short for "optic switch (aka "coupler")". It senses the difference between light and dark. As long as the LED flashes, the coupler is working. It should be kept clean, using a soft brush on it, and the "vane" which passes thru it. Ron Rich
|
|
|
|
Post by prime on Jun 6, 2021 14:11:26 GMT
hi Ron In light of the optic switch working, and all connectors seem to be fine. Would my next area be logic board?
|
|
|
|
Post by Ron Rich on Jun 6, 2021 14:20:36 GMT
Pete,
My first guess on intermittent problems such as you are seeing, is the power supply (caps) and or the connectors. Hint: See the Rowe section for the "common problems" post. Ron Rich
|
|
|
|
Post by jukenorman on Jun 6, 2021 14:55:48 GMT
Hi Pete,
The power supplies are best place to start, of course. If everything is in order there, the opto board interfaces to the logic board. I suspect you're going to need the large schematic though.
Norman
|
|
|
|
Post by prime on Jun 6, 2021 15:06:02 GMT
Any idea where to buy/download a large schematic for the power supply, all i have are small pages that loose to much info when enlarged. pete
|
|
|
|
Post by Ron Rich on Jun 6, 2021 15:51:49 GMT
Hi Pete,
READ, what Norman posted above, and check the FAQ's section-- Ron Rich
|
|
|
|
Post by prime on Jun 6, 2021 17:11:42 GMT
Before i work with the power supply ive noticed now the red LED light on the opto board does not flicker anymore, if i manually trip the switch the carriage goes around once but no light. When im able to use scan it spins no light.
|
|
|
|
Post by Ron Rich on Jun 6, 2021 17:25:46 GMT
Hi Pete,
Time for you to stand back, and think, on this a little-- re-read what's been written on this thread, and answer our questions-- Also, you probably should start all over using the RockOla supplied trouble shooting guide. Ron Rich
|
|
|
|
Post by prime on Jun 6, 2021 19:07:04 GMT
I agree Ron i have been rereading entire posts and i have looked at trouble shooting guide, there is a test for the logic board but it states test to be done on unit not in free play, there is no test written for unit in free play . the fact that my unit does not spin carriage when turning off and on and that the scan works at this moment for now is leading me to logic board. I will check power boards for defective parts and go from there
|
|
|
|
Post by Ron Rich on Jun 6, 2021 19:17:23 GMT
Pete,
Look carefully at "plugs/headers"-- look especially hard at ground connections that are ground for both, AC and DC, circuits-- these tend to heat up and deform pins faster then anything else-- Ron Rich
|
|
|
|
Post by prime on Jun 6, 2021 22:11:25 GMT
After i check boards i will try and test with free play off and see what happens
|
|
|
|
Post by prime on Jun 7, 2021 22:26:41 GMT
Hi guys still slowly moving forward checking all connections, also waiting for schematics they may take quite a while. A new issue has arisen and help to understand would be greatly appreciated. earlier the unit would not do anything when powering up but if i hit scan the carriage would move then if i switched to play it would turn the carriage a few inches then the gripper would grab a record and place it on the turntable, turntable would spin and record would play, i then hit scan again and the record would start o eject, then place switch back to play and the gripper would return the record to magazine, then it would spin and go back to start. I have been checking wires on logic board. Now after touching wires when i turn on unit nothing so i hit scan magazine starts, return to play magazine moves then stops and gripper grabs record and places on turntable but does not release record, turntable spins but tone arm does not move, if i hit scan or eject nothing happens, i can manually turn motor to return record and after its in the magazine, place unit to play and the magazine spins. There are two relays on logic board do they control all of this.
|
|
|
|
Post by prime on Jun 8, 2021 0:37:49 GMT
Sorry forget the above long rant, i dont think the logic board or relays can affect this, i think the gripper arm is sticking so it is stopping before completing the cycle, must just be a fluke it is happening now. I may have to disassemble the gripper mech and clean
|
|
|
|
Post by Ron Rich on Jun 8, 2021 2:43:16 GMT
Hi Pete,
This is why you do not proceed without the proper docs. I THINK--but I may be mixing up something-- that there is a "slow down resistor" in the gripper motor circuit, that is introduced at the point you are saying it stops--If it has failed, that would account for this situation. Ron Rich
|
|
