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Author Topic: CP500-PS Reapir Ram Sup Film Handler Posts: 57 From: Malaysia Registered: Mar 2008 posted 09-13-2011 03:36 AM                     HI...i have a few units of faulty CP500 Power Supply units. I understand that dolby don't carry these parts anymore. Can it be repaired coz we have about 17 Cp500 running units and i can't buy from dolby. Please advice. Thank You, RAM  |  IP: Logged Richard Hamilton Phenomenal Film Handler Posts: 1341 From: Evansville, Indiana Registered: Jan 2000 posted 09-13-2011 06:25 AM                     Mark?????....Can you help rape these?  |  IP: Logged Chase Taylor Expert Film Handler Posts: 175 From: Troy, Alabama, USA Registered: Mar 2001 posted 09-13-2011 08:36 AM                        Here in America I think the power supply is still available for the CP-500. Can anyone confirm this? Chase  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 09-13-2011 10:02 AM                     Thats very easy to do actually. Ditto for the CP-650 power supply and the Cat 701 supply. Just replace all the electrolytic capacitors on the board. Especially the large input electrolytic cap. Use only 105 degree c. rated caps!! There hasn't been one yet that I haven't been able to get going again! Mark  |  IP: Logged Ram Sup Film Handler Posts: 57 From: Malaysia Registered: Mar 2008 posted 09-13-2011 03:33 PM                     Hi..Mark, electrolytic capacitors on the board. Especially the large input electrolytic cap. Use only 105 degree c. rated caps!! It's kind of hard to get the exact rated CAPS down here. Can you assist in telling me how much would it cost. Is this all we need to change on CP500 POwer Supply to get it working again.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 09-15-2011 05:11 PM                     Normally the caps dry out with age caused by heat and time... Average cap life is ~7 to ~10 years for 105 degree c. caps. This supply is quite old now, much older then 7 top 10 years old. I have even seen 4 or 5 year old CP-650 power supplies fail this way... even to the point the caps leak a black goo substance. It is certainly worth giving it a try. If the supply is completely dead replace the large input cap first. Beyond that you can replace as needed but I reccomend replacing them all. As for will this absolutely fix the supply? I can't guarantee that as other components can and do fail on occasion. But 85% of the time it is just the caps gone bad. Mark  |  IP: Logged Ram Sup Film Handler Posts: 57 From: Malaysia Registered: Mar 2008 posted 09-18-2011 09:22 AM                     HI.Mark, How much would this cap cost. Is it possible sent here i were to buy in a bulk.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 09-18-2011 09:26 PM                     Ram... There are a couple of variations on the supply, in the 650 I know of at least three. I do not know the values of the caps off the top of my head. You could probably mail order them from Great Britian or some place like Allied Radio or Newark Electronics in the States... You are looking at ~ $30 USD worth of caps new... Mark  |  IP: Logged Ram Sup Film Handler Posts: 57 From: Malaysia Registered: Mar 2008 posted 09-24-2011 11:42 AM                     Thanks Mark, I will check them out. Thanks alot for the helpfull input..guys..  |  IP: Logged

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