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  #1  
Old 04-19-2009, 02:18 PM
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retrodude retrodude is offline
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Yamaha CR-820 lights out

Hey all,
just picked up a cr-820. after cleaning some contacts, all is well, sounds sweet. the only thing is the lights are out-all of them. I see the red & white wires that go to the 3 bulbs near the meters- all filimets look toasted, so I assume the voltage is there. question: anyone have exp with changing these bulbs & where to find them? also, do the bulbs come wired? it looked like they are hard wired. the needle light looks like a bear to change, any thoughts?
thanks
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Old 04-19-2009, 02:42 PM
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sleepyweasel sleepyweasel is offline
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maybe this will helphttp://www.audiokarma.org/forums/sho...d.php?t=223981
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Old 04-19-2009, 02:47 PM
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KingBubba KingBubba is offline
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The A-690 issue does not apply here. The 820 and some of the others in the series have bulbs that are wired in series. I forget which but the meter bulbs come to mind. IIRC they are a bit of a pain and that is why I did not bother with my CR-820.
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Old 04-19-2009, 02:57 PM
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The 820 uses 12V 60mA bulbs (four) as in addition to the three around the meters there is one in the dial pointer. Use a good Philips #0 screwdriver bit to remove those two little screws atop the pointer because if you strip them they are not an easily obtainable size. Dave(dgwojo) can get you the bulbs.
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Old 10-02-2012, 07:07 PM
fengsuhi fengsuhi is offline
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After reading a lot of opinions here I bought a recapped Yamaha CR-820. I have replaced the lamps with 12v 60mA bulbs get from a local store. Everything went fine but one lamp is much brighter than the others. Did I something wrong? I soldered the wire directly to the board because the bulbs came with long wire, better solution than connect with the old wire.

Picture about the lights:http://i.minus.com/i3JjfToONddy5.jpg
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Old 10-02-2012, 07:10 PM
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petehall347 petehall347 is online now
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check the rating of the bright bulb ..
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Old 10-03-2012, 04:16 AM
fengsuhi fengsuhi is offline
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Quote:
Originally Posted by petehall347 View Post
check the rating of the bright bulb ..
I am new to electronics. There are no info on the bulbs and I don't have any device to measure them. I bought a spare bulb so I've replaced the bright one to this but nothing's changed. (Or accidentally I have two higher rated lamps.)
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Old 10-03-2012, 05:06 AM
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petehall347 petehall347 is online now
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check your wiring ..here is part of the schematic ,,
Attached Images
File Type: jpg Untitled.jpg (97.1 KB, 36 views)

Last edited by petehall347; 10-03-2012 at 05:41 AM.
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Old 10-03-2012, 06:45 AM
fengsuhi fengsuhi is offline
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Maybe I messed up the wiring but I have the schematic and checked many times the connections. Is it possible that the bulbs are lighting but the wiring is incorrect? As I know they are in series connection.
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Old 10-03-2012, 07:34 AM
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I'd make sure all are identical and replaced at once to assure proper series circuit operation, most lamp sellers don't do that.
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Old 10-04-2012, 10:26 AM
fengsuhi fengsuhi is offline
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Quote:
Originally Posted by fengsuhi View Post
checked many times the connections
Problem solved! Silly mistake: I swapped the L3 and L4 connections. On the schematics the connections comes like 1, 2, 4, 3 and I missed it. Anyway, I'm a newbie here, it was amazing how helpful and quick you are. Thanks.
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