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Rockola 440 Gripper and Magazine Motor Blowing Fuses



 
 
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  #41  
Old August 7th 15, 06:13 PM posted to alt.collecting.juke-boxes
John Robertson
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Posts: 812
Default Rockola 440 Gripper and Magazine Motor Blowing Fuses

On 08/07/2015 4:09 AM, wrote:
On Tuesday, October 7, 2014 at 3:26:29 PM UTC+11, John Robertson wrote:
On 10/06/2014, 5:39 PM,
wrote:
John,
After about 200 plays the circuit breaker started popping. I tried my voodoo again with an external supply and it worked for about 40 plays--then the breaker started popping again.

I pulled it out and, without a load it was a hair over 2 amps.

I took the motor apart per your instructions. You were exactly, 100%, without any question, correct. I cleaned all the lose dust out and found an old razor blade in a parts drawer and worked with some magnifying goggles for about 20 minutes. Then I used a toothbrush to get anything left. Amps came down under .25 .

I just installed it into the machine and I'm amazed how FAST it loads and unloads the record!

Thankfully the other motor is drawing .25 because it looks too buried to remove.

John, I couldn't have done this without you and this thread.

Regards,
John




Glad to help!

John :-#)#

Hi John,

I have an issue with a Rockola 484 with 11 VAC present at the gripper motor plug !!!
I believe it should be around 28VDC.
Would appreciate if you could give me a direction to look where this is supplied from

Regards
Stewart

Australia


Check for 28VDC at the main bridge rectifier. Then get out the
schematics and manual and follow the circuit diagrams to see where the
potential problem is. Might be that the circuit that shorts out the
series resistor (slows gripper down as it approaches each end of the
cycle) is the problem...

If you don't have the service manual - get it!

John :-#)#

--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
(604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
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  #42  
Old May 29th 17, 01:47 AM posted to alt.collecting.juke-boxes
[email protected]
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Posts: 7
Default Rockola 440 Gripper and Magazine Motor Blowing Fuses

Hello John. You once helped me fix a 484 that I sold for a nice profit. I now own another--stupid me. It has about 6 issues that I'm pretty sure I can fix... One issue that I'm not sure about is that the gripper arm rises slightly before gripping to remove the record. I'm guessing that I need to adjust a cam? I sure would like your professional opinion before I start adjusting stuff... I've lubricated the main gears and I can see that the gripper gear isn't the first gear to turn immediately at end-of-record. Thoughts?
Happy Memorial day,
John
 




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