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#1
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R-85 losing 'home', playing wrong selection
I have this juke and recently it started to play the wrong selection.
I cleaned the optical switch and tried to adjust it per the manual. It plays fine right after that for the remainder of the night and plays the correct selection. Then once turned off and back on at a later time it goes back to playing the wrong selections again and I adjust it again and it's fine for the evening. Any thoughts on what part might need to be replaced or what other adjustment I could be missing? Al |
#2
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R-85 losing 'home', playing wrong selection
On Jan 29, 2:17*am, Old School Al wrote:
I have this juke and recently it started to play the wrong selection. I cleaned the optical switch and tried to adjust it per the manual. It plays fine right after that for the remainder of the night and plays the correct selection. Then once turned off and back on at a later time it goes back to playing the wrong selections again and I adjust it again and it's fine for the evening. Any thoughts on what part might need to be replaced or what other adjustment I could be missing? Al These do fail, become intermittent, and the only cure is replacement. However, you could have something strange like fluctuating LED supply voltage, bad earth on the receiver end etc. My money would be on the optical device itself, or some temperature sensitive component on the mech control board associated with reading these signals (it might stabilise in the time you take to do the adjustment as it "warms up" and might make you think that the adjustment is what is fixing it). to prove this theory, leave the machine on for 30 mins or so, and see if it comes good by itself. if so, replace the IC (339?) that the opto receivers connect to |
#3
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Quote:
The R-85 jukebox was subject to dry joints (cold joints USA) on all of the connection pins of the boards. I would check these out from the power supply pcb onto the rest of the boards. You may find out that if you check the battery on the CCC that it will be low (with the power off) it should be 2.4 volts DC. Regards Alan Hood (ami-man) UK |
#4
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R-85 losing 'home', playing wrong selection
Thanks guys! I will check these items out and let you know the
outcome. I had reflowed the solder on the mech control board pins, but no joy. I will do likewise on the other board and check the battery. Then move on to to the other items you mentioned if no success there. BTW, who do you suggest buying parts from for jukes of this vintage? Al |
#5
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R-85 losing 'home', playing wrong selection
Thanks for the tips, guys. Finally got around to checking it out and
it turned out to be the battery on the CCC. It_appeared_to be conneted but upon closer inspection the negative lead was simply resting on the battery so I soldered it on. Also reflowed board connectors while I had it off. Also, checked the battery voltage and it was 2.5v. All appears to be well now, thanks again. On Jan 29, 4:49*am, Alan Hood wrote: Old School Al;642320 Wrote: I have this juke and recently it started to play the wrong selection. I cleaned the optical switch and tried to adjust it per the manual. It plays fine right after that for the remainder of the night and plays the correct selection. Then once turned off and back on at a later time it goes back to playing the wrong selections again and I adjust it again and it's fine for the evening. Any thoughts on what part might need to be replaced or what other adjustment I could be missing? Al Hi Al, The R-85 jukebox was subject to dry joints (cold joints USA) on all of the connection pins of the boards. I would check these out from the power supply pcb onto the rest of the boards. You may find out that if you check the battery on the CCC that it will be low (with the power off) it should be 2.4 volts DC. Regards Alan Hood (ami-man) UK -- Alan Hood |
#6
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Quote:
Glad to hear that you have sorted out your jukebox. I suggest that while you are in a fixing mode that you check out the the Pricing Board (all lines of data go through this board) and the Power supply for dry joints as well. Regards Alan Hood ami-man UK |
#7
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R-85 losing 'home', playing wrong selection
On Feb 8, 3:32*pm, Old School Al wrote:
Thanks for the tips, guys. Finally got around to checking it out and it turned out to be the battery on the CCC. It_appeared_to be conneted but upon closer inspection the negative lead was simply resting on the battery so I soldered it on. Also reflowed board connectors while I had it off. Also, checked the battery voltage and it was 2.5v. All appears to be well now, thanks again. If it is one of those black rectangular NI cad things, get rid of it quick, or mount it on leads well away from the board if you dont it will leak, corrode the tracks and you dont need that. IF you MUST have it on the board, get a lithium 1/2 AA cell and mount it on the board, making certain you use an 1n400x diode in series with the battery. (this MUST be done, to reduce the 3v supply to 2.4 and also to prevent the lithium from being recharged. Lithium's dont seem to leak that I have seen PCB + terminal ----------II----------+ lithium battery - --------------- pcb - terminal striped end / unstriped end While I could be wrong, I would be concerned with a diagnosis of a dead or missing battery as cause of this problem. In my experience the juke will work fine without a battery (you will just lose popularity stats and saved selection data at turn off, but if its a t home you probably don't need this.). The juke has low battery detection, and if activated, this should cause the program to wipe the memory (in the 5101s) at turn-on. On Jan 29, 4:49*am, Alan Hood wrote: Old School Al;642320 Wrote: I have this juke and recently it started to play the wrong selection. I cleaned the optical switch and tried to adjust it per the manual. It plays fine right after that for the remainder of the night and plays the correct selection. Then once turned off and back on at a later time it goes back to playing the wrong selections again and I adjust it again and it's fine for the evening. Any thoughts on what part might need to be replaced or what other adjustment I could be missing? Al Hi Al, The R-85 jukebox was subject to dry joints (cold joints USA) on all of the connection pins of the boards. I would check these out from the power supply pcb onto the rest of the boards. You may find out that if you check the battery on the CCC that it will be low (with the power off) it should be 2.4 volts DC. Regards Alan Hood (ami-man) UK -- Alan Hood |
#8
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R-85 losing 'home', playing wrong selection
Well, the trouble has returned. Here is what I am seeing now.
Turn the unit on and play a song, wroong selection plays. After a couple wrong selections play it then starts playing the correct selection. Sorta like it warmed up, I guess. Does this indicate a certain part I should be focusing on? On Jan 28, 11:17*am, Old School Al wrote: I have this juke and recently it started to play the wrong selection. I cleaned the optical switch and tried to adjust it per the manual. It plays fine right after that for the remainder of the night and plays the correct selection. Then once turned off and back on at a later time it goes back to playing the wrong selections again and I adjust it again and it's fine for the evening. Any thoughts on what part might need to be replaced or what other adjustment I could be missing? Al |
#9
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R-85 losing 'home', playing wrong selection (part II)
Guess I should have changed the subject to reflect that this remains
unresolved. Done. On Mar 22, 4:28*pm, Old School Al wrote: Well, the trouble has returned. Here is what I am seeing now. Turn the unit on and play a song, wroong selection plays. After a couple wrong selections play it then starts playing the correct selection. Sorta like it warmed up, I guess. Does this indicate a certain part I should be focusing on? On Jan 28, 11:17*am, Old School Al wrote: I have this juke and recently it started to play the wrong selection. I cleaned the optical switch and tried to adjust it per the manual. It plays fine right after that for the remainder of the night and plays the correct selection. Then once turned off and back on at a later time it goes back to playing the wrong selections again and I adjust it again and it's fine for the evening. Any thoughts on what part might need to be replaced or what other adjustment I could be missing? Al- Hide quoted text - - Show quoted text - |
#10
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R-85 losing 'home', playing wrong selection (part II)
Old School Al wrote:
Guess I should have changed the subject to reflect that this remains unresolved. Done. On Mar 22, 4:28 pm, Old School Al wrote: Well, the trouble has returned. Here is what I am seeing now. Turn the unit on and play a song, wroong selection plays. After a couple wrong selections play it then starts playing the correct selection. Sorta like it warmed up, I guess. Does this indicate a certain part I should be focusing on? On Jan 28, 11:17 am, Old School Al wrote: I have this juke and recently it started to play the wrong selection. I cleaned the optical switch and tried to adjust it per the manual. It plays fine right after that for the remainder of the night and plays the correct selection. Then once turned off and back on at a later time it goes back to playing the wrong selections again and I adjust it again and it's fine for the evening. Any thoughts on what part might need to be replaced or what other adjustment I could be missing? Al- Hide quoted text - - Show quoted text - I forget if that box has an led that flashes as it scans? If so, does it flash when not working and scanning with the scan switch? Besides that, the optic couplers often go bad so if it's intermittent, that would be the first thing to change, assuming you checked the cables and connections. Tony |
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