Home |
Search |
Today's Posts |
|
Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to sci.electronics.repair
|
|||
|
|||
Mini Stereo Problem
My 5 year old Sony MHCMG110 mini stereo has a problem:
The volume knob control doesn't always work properly. Before I open it up I thought I'd post here and get some guidance. The volume level heard appears to correspond correctly with the digital level displayed, which goes from 1 to 30, maybe higher. I never have it higher than around 20. However, when spinning the volume knob those numbers don't always advance or decline as expected. Sometimes they even go backwards briefly!! When using the remote control, the volume changes smoothly and properly. My first thought was a slipping pulley, but how would that make the volume go the wrong way? It doesn't go the wrong way a lot and not much - generally one digit and only momentarily when spinning the dial. Maybe it IS a spinning pulley. Anyway, this thing is pretty big and complex what with all the features (and I'm therefore hesitant to open it): 60 CD changer 2 cassette bays, one recording auto-reverse AM and FM The speakers are separate (this is the stereo version, not 5.1 or 4.0) I bought the service manual yesterday online (they emailed it to me) and I printed it out. It's mostly full of the schematics, but there are parts diagrams and 3D assembly/disassembly diagrams. Looking through the whole thing I didn't spot anything that would directly relate to this problem. I figure I can either live with it or open it up and try to find the problem, maybe replacing a pulley or applying a rubber rejuvenator (recommendations?). Or, I could get a learning remote and use IT to change the volume (the one that came with the Sony has a kind of weak signal). I'd rather fix the spinning control than have to use a remote. Thanks for any guidance/help. Dan |
#2
Posted to sci.electronics.repair
|
|||
|
|||
Mini Stereo Problem
"Dan_Musicant" wrote in message ... My 5 year old Sony MHCMG110 mini stereo has a problem: The volume knob control doesn't always work properly. Does it have a remote? |
#3
Posted to sci.electronics.repair
|
|||
|
|||
Mini Stereo Problem
Dan_Musicant wrote:
My 5 year old Sony MHCMG110 mini stereo has a problem: The volume knob control doesn't always work properly. Before I open it up I thought I'd post here and get some guidance. The volume level heard appears to correspond correctly with the digital level displayed, which goes from 1 to 30, maybe higher. I never have it higher than around 20. However, when spinning the volume knob those numbers don't always advance or decline as expected. Sometimes they even go backwards briefly!! When using the remote control, the volume changes smoothly and properly. My first thought was a slipping pulley, but how would that make the volume go the wrong way? It doesn't go the wrong way a lot and not much - generally one digit and only momentarily when spinning the dial. Maybe it IS a spinning pulley. Anyway, this thing is pretty big and complex what with all the features (and I'm therefore hesitant to open it): 60 CD changer 2 cassette bays, one recording auto-reverse AM and FM The speakers are separate (this is the stereo version, not 5.1 or 4.0) I bought the service manual yesterday online (they emailed it to me) and I printed it out. It's mostly full of the schematics, but there are parts diagrams and 3D assembly/disassembly diagrams. Looking through the whole thing I didn't spot anything that would directly relate to this problem. I figure I can either live with it or open it up and try to find the problem, maybe replacing a pulley or applying a rubber rejuvenator (recommendations?). Or, I could get a learning remote and use IT to change the volume (the one that came with the Sony has a kind of weak signal). I'd rather fix the spinning control than have to use a remote. Thanks for any guidance/help. Dan That type of volume control uses LEDs and light sensors to detect movement of a flat wheel with little holes in it. Either the holes have become clogged with dust or the LEDs have gotten weak or coated with dust. If you disassemble the control to clean it you may never get it back together correctly or may cause it to stop working completely, so your best bet is to use the remote control for volume adjustments. |
#4
Posted to sci.electronics.repair
|
|||
|
|||
Mini Stereo Problem
"Jumpster Jiver" wrote in message news:wf4Lg.1400$I71.645@trnddc01... That type of volume control uses LEDs and light sensors to detect movement of a flat wheel with little holes in it. Either the holes have become clogged with dust or the LEDs have gotten weak or coated with dust. If you disassemble the control to clean it you may never get it back together correctly or may cause it to stop working completely, so your best bet is to use the remote control for volume adjustments. A can of compressed air? |
#5
Posted to sci.electronics.repair
|
|||
|
|||
Mini Stereo Problem
Jumpster Jiver wrote:
Dan_Musicant wrote: My 5 year old Sony MHCMG110 mini stereo has a problem: The volume knob control doesn't always work properly. Before I open it up I thought I'd post here and get some guidance. The volume level heard appears to correspond correctly with the digital level displayed, which goes from 1 to 30, maybe higher. I never have it higher than around 20. However, when spinning the volume knob those numbers don't always advance or decline as expected. Sometimes they even go backwards briefly!! When using the remote control, the volume changes smoothly and properly. My first thought was a slipping pulley, but how would that make the volume go the wrong way? It doesn't go the wrong way a lot and not much - generally one digit and only momentarily when spinning the dial. Maybe it IS a spinning pulley. Anyway, this thing is pretty big and complex what with all the features (and I'm therefore hesitant to open it): 60 CD changer 2 cassette bays, one recording auto-reverse AM and FM The speakers are separate (this is the stereo version, not 5.1 or 4.0) I bought the service manual yesterday online (they emailed it to me) and I printed it out. It's mostly full of the schematics, but there are parts diagrams and 3D assembly/disassembly diagrams. Looking through the whole thing I didn't spot anything that would directly relate to this problem. I figure I can either live with it or open it up and try to find the problem, maybe replacing a pulley or applying a rubber rejuvenator (recommendations?). Or, I could get a learning remote and use IT to change the volume (the one that came with the Sony has a kind of weak signal). I'd rather fix the spinning control than have to use a remote. Thanks for any guidance/help. Dan That type of volume control uses LEDs and light sensors to detect movement of a flat wheel with little holes in it. Either the holes have become clogged with dust or the LEDs have gotten weak or coated with dust. If you disassemble the control to clean it you may never get it back together correctly or may cause it to stop working completely, so your best bet is to use the remote control for volume adjustments. It's a rotary encoder constructed much like a vcr mode switch. No LED involved. The encoder needs to be replaced, that's all. $13.24 list from Partstore.com. Part number 1-473-392-11 Mark Z. |
#6
Posted to sci.electronics.repair
|
|||
|
|||
Mini Stereo Problem
1Mark D. Zacharias wrote:
Jumpster Jiver wrote: Dan_Musicant wrote: My 5 year old Sony MHCMG110 mini stereo has a problem: The volume knob control doesn't always work properly. Before I open it up I thought I'd post here and get some guidance. The volume level heard appears to correspond correctly with the digital level displayed, which goes from 1 to 30, maybe higher. I never have it higher than around 20. However, when spinning the volume knob those numbers don't always advance or decline as expected. Sometimes they even go backwards briefly!! When using the remote control, the volume changes smoothly and properly. My first thought was a slipping pulley, but how would that make the volume go the wrong way? It doesn't go the wrong way a lot and not much - generally one digit and only momentarily when spinning the dial. Maybe it IS a spinning pulley. Anyway, this thing is pretty big and complex what with all the features (and I'm therefore hesitant to open it): 60 CD changer 2 cassette bays, one recording auto-reverse AM and FM The speakers are separate (this is the stereo version, not 5.1 or 4.0) I bought the service manual yesterday online (they emailed it to me) and I printed it out. It's mostly full of the schematics, but there are parts diagrams and 3D assembly/disassembly diagrams. Looking through the whole thing I didn't spot anything that would directly relate to this problem. I figure I can either live with it or open it up and try to find the problem, maybe replacing a pulley or applying a rubber rejuvenator (recommendations?). Or, I could get a learning remote and use IT to change the volume (the one that came with the Sony has a kind of weak signal). I'd rather fix the spinning control than have to use a remote. Thanks for any guidance/help. Dan That type of volume control uses LEDs and light sensors to detect movement of a flat wheel with little holes in it. Either the holes have become clogged with dust or the LEDs have gotten weak or coated with dust. If you disassemble the control to clean it you may never get it back together correctly or may cause it to stop working completely, so your best bet is to use the remote control for volume adjustments. It's a rotary encoder constructed much like a vcr mode switch. No LED involved. The encoder needs to be replaced, that's all. $13.24 list from Partstore.com. Part number 1-473-392-11 Mark Z. BTW the model number of the main unit is HCD-MG110. mz |
#7
Posted to sci.electronics.repair
|
|||
|
|||
Mini Stereo Problem
On Mon, 04 Sep 2006 17:15:09 GMT, "Homer J Simpson"
wrote: : :"Dan_Musicant" wrote in message .. . : : My 5 year old Sony MHCMG110 mini stereo has a problem: : : The volume knob control doesn't always work properly. : oes it have a remote? Yeah, read the OP. There's no problem when using the remote. It's just that I have this thing in my kitchen and I'm always fiddling with the volume and don't want to grab a remote every time I want to change the volume. I guess I'm impatient and twist quickly - if I twist slowly, it's OK. I figure a pully is slipping due to excessive force going beyond the tolerance of the pulley at this point. Maybe I can tighten it up by just applying some liquid rubber rejuvenator. I used to have some of that stuff but it dried up in the bottle. The liquid medium was evidently quite volatile. I seem to remember going to my local indy electronics supplier and being told that for EPA reasons, the product had been discontinued. That's why I asked for recommendations for a product. Dan |
#8
Posted to sci.electronics.repair
|
|||
|
|||
Mini Stereo Problem
On Tue, 05 Sep 2006 01:18:20 GMT, Jumpster Jiver
wrote: an_Musicant wrote: : My 5 year old Sony MHCMG110 mini stereo has a problem: : : The volume knob control doesn't always work properly. Before I open it : up I thought I'd post here and get some guidance. : : The volume level heard appears to correspond correctly with the digital : level displayed, which goes from 1 to 30, maybe higher. I never have it : higher than around 20. However, when spinning the volume knob those : numbers don't always advance or decline as expected. Sometimes they even : go backwards briefly!! When using the remote control, the volume changes : smoothly and properly. : : My first thought was a slipping pulley, but how would that make the : volume go the wrong way? It doesn't go the wrong way a lot and not much : - generally one digit and only momentarily when spinning the dial. Maybe : it IS a spinning pulley. Anyway, this thing is pretty big and complex : what with all the features (and I'm therefore hesitant to open it): : : 60 CD changer : 2 cassette bays, one recording auto-reverse : AM and FM : : The speakers are separate (this is the stereo version, not 5.1 or 4.0) : : I bought the service manual yesterday online (they emailed it to me) and : I printed it out. It's mostly full of the schematics, but there are : parts diagrams and 3D assembly/disassembly diagrams. Looking through the : whole thing I didn't spot anything that would directly relate to this : problem. I figure I can either live with it or open it up and try to : find the problem, maybe replacing a pulley or applying a rubber : rejuvenator (recommendations?). Or, I could get a learning remote and : use IT to change the volume (the one that came with the Sony has a kind : of weak signal). I'd rather fix the spinning control than have to use a : remote. Thanks for any guidance/help. : : Dan : :That type of volume control uses LEDs and light sensors to detect :movement of a flat wheel with little holes in it. Either the holes have :become clogged with dust or the LEDs have gotten weak or coated with dust. :If you disassemble the control to clean it you may never get it back :together correctly or may cause it to stop working completely, so your :best bet is to use the remote control for volume adjustments. Ah, that's one reason I posted. This thing is big and seems complicated. I've opened a lot of stuff but nothing this complex. I do have the service manual, but will think at LEAST twice before I start taking it apart. Thanks so much for your description of the mechanisms at work here. If I go in there, I'll have an idea what to look for. Being in my kitchen where I cook, there's dust and grease coated dust particles floating around quite often. I occasionally clean off the unit of all the grease that accummulates on the surface. Some of that has probably found its way inside. Dan |
#9
Posted to sci.electronics.repair
|
|||
|
|||
Mini Stereo Problem
On Tue, 05 Sep 2006 01:34:46 GMT, "Homer J Simpson"
wrote: : :"Jumpster Jiver" wrote in message :news:wf4Lg.1400$I71.645@trnddc01... : : That type of volume control uses LEDs and light sensors to detect movement : of a flat wheel with little holes in it. Either the holes have become : clogged with dust or the LEDs have gotten weak or coated with dust. : If you disassemble the control to clean it you may never get it back : together correctly or may cause it to stop working completely, so your : best bet is to use the remote control for volume adjustments. : :A can of compressed air? Possibly. It's worth a try. |
#10
Posted to sci.electronics.repair
|
|||
|
|||
Mini Stereo Problem
On Tue, 05 Sep 2006 11:38:19 GMT, "Mark D. Zacharias"
wrote: :Jumpster Jiver wrote: : Dan_Musicant wrote: : My 5 year old Sony MHCMG110 mini stereo has a problem: : : The volume knob control doesn't always work properly. Before I open : it up I thought I'd post here and get some guidance. : : The volume level heard appears to correspond correctly with the : digital level displayed, which goes from 1 to 30, maybe higher. I : never have it higher than around 20. However, when spinning the : volume knob those numbers don't always advance or decline as : expected. Sometimes they even go backwards briefly!! When using the : remote control, the volume changes smoothly and properly. : : My first thought was a slipping pulley, but how would that make the : volume go the wrong way? It doesn't go the wrong way a lot and not : much - generally one digit and only momentarily when spinning the : dial. Maybe it IS a spinning pulley. Anyway, this thing is pretty : big and complex what with all the features (and I'm therefore : hesitant to open it): 60 CD changer : 2 cassette bays, one recording auto-reverse : AM and FM : : The speakers are separate (this is the stereo version, not 5.1 or : 4.0) I bought the service manual yesterday online (they emailed it to me) : and I printed it out. It's mostly full of the schematics, but there : are parts diagrams and 3D assembly/disassembly diagrams. Looking : through the whole thing I didn't spot anything that would directly : relate to this problem. I figure I can either live with it or open : it up and try to find the problem, maybe replacing a pulley or : applying a rubber rejuvenator (recommendations?). Or, I could get a : learning remote and use IT to change the volume (the one that came : with the Sony has a kind of weak signal). I'd rather fix the : spinning control than have to use a remote. Thanks for any : guidance/help. Dan : : That type of volume control uses LEDs and light sensors to detect : movement of a flat wheel with little holes in it. Either the holes : have become clogged with dust or the LEDs have gotten weak or coated : with dust. If you disassemble the control to clean it you may never : get it back together correctly or may cause it to stop working : completely, so your best bet is to use the remote control for volume : adjustments. : : :It's a rotary encoder constructed much like a vcr mode switch. No LED :involved. The encoder needs to be replaced, that's all. : :$13.24 list from Partstore.com. Part number 1-473-392-11 : :Mark Z. : Thank you!! Dan |
#11
Posted to sci.electronics.repair
|
|||
|
|||
Mini Stereo Problem
On Tue, 05 Sep 2006 11:40:03 GMT, "Mark D. Zacharias"
wrote: :1Mark D. Zacharias wrote: : Jumpster Jiver wrote: : Dan_Musicant wrote: : My 5 year old Sony MHCMG110 mini stereo has a problem: : : The volume knob control doesn't always work properly. Before I open : it up I thought I'd post here and get some guidance. : : The volume level heard appears to correspond correctly with the : digital level displayed, which goes from 1 to 30, maybe higher. I : never have it higher than around 20. However, when spinning the : volume knob those numbers don't always advance or decline as : expected. Sometimes they even go backwards briefly!! When using the : remote control, the volume changes smoothly and properly. : : My first thought was a slipping pulley, but how would that make the : volume go the wrong way? It doesn't go the wrong way a lot and not : much - generally one digit and only momentarily when spinning the : dial. Maybe it IS a spinning pulley. Anyway, this thing is pretty : big and complex what with all the features (and I'm therefore : hesitant to open it): 60 CD changer : 2 cassette bays, one recording auto-reverse : AM and FM : : The speakers are separate (this is the stereo version, not 5.1 or : 4.0) I bought the service manual yesterday online (they emailed it : to me) and I printed it out. It's mostly full of the schematics, : but there are parts diagrams and 3D assembly/disassembly diagrams. : Looking : through the whole thing I didn't spot anything that would directly : relate to this problem. I figure I can either live with it or open : it up and try to find the problem, maybe replacing a pulley or : applying a rubber rejuvenator (recommendations?). Or, I could get a : learning remote and use IT to change the volume (the one that came : with the Sony has a kind of weak signal). I'd rather fix the : spinning control than have to use a remote. Thanks for any : guidance/help. Dan : : That type of volume control uses LEDs and light sensors to detect : movement of a flat wheel with little holes in it. Either the holes : have become clogged with dust or the LEDs have gotten weak or coated : with dust. If you disassemble the control to clean it you may never : get it back together correctly or may cause it to stop working : completely, so your best bet is to use the remote control for volume : adjustments. : : : It's a rotary encoder constructed much like a vcr mode switch. No LED : involved. The encoder needs to be replaced, that's all. : : $13.24 list from Partstore.com. Part number 1-473-392-11 : : Mark Z. : :BTW the model number of the main unit is HCD-MG110. : :mz : Yup. Thanks again!! Dan |
#12
Posted to sci.electronics.repair
|
|||
|
|||
Mini Stereo Problem
Mark D. Zacharias wrote:
Jumpster Jiver wrote: Dan_Musicant wrote: My 5 year old Sony MHCMG110 mini stereo has a problem: The volume knob control doesn't always work properly. Before I open it up I thought I'd post here and get some guidance. The volume level heard appears to correspond correctly with the digital level displayed, which goes from 1 to 30, maybe higher. I never have it higher than around 20. However, when spinning the volume knob those numbers don't always advance or decline as expected. Sometimes they even go backwards briefly!! When using the remote control, the volume changes smoothly and properly. My first thought was a slipping pulley, but how would that make the volume go the wrong way? It doesn't go the wrong way a lot and not much - generally one digit and only momentarily when spinning the dial. Maybe it IS a spinning pulley. Anyway, this thing is pretty big and complex what with all the features (and I'm therefore hesitant to open it): 60 CD changer 2 cassette bays, one recording auto-reverse AM and FM The speakers are separate (this is the stereo version, not 5.1 or 4.0) I bought the service manual yesterday online (they emailed it to me) and I printed it out. It's mostly full of the schematics, but there are parts diagrams and 3D assembly/disassembly diagrams. Looking through the whole thing I didn't spot anything that would directly relate to this problem. I figure I can either live with it or open it up and try to find the problem, maybe replacing a pulley or applying a rubber rejuvenator (recommendations?). Or, I could get a learning remote and use IT to change the volume (the one that came with the Sony has a kind of weak signal). I'd rather fix the spinning control than have to use a remote. Thanks for any guidance/help. Dan That type of volume control uses LEDs and light sensors to detect movement of a flat wheel with little holes in it. Either the holes have become clogged with dust or the LEDs have gotten weak or coated with dust. If you disassemble the control to clean it you may never get it back together correctly or may cause it to stop working completely, so your best bet is to use the remote control for volume adjustments. It's a rotary encoder constructed much like a vcr mode switch. No LED involved. The encoder needs to be replaced, that's all. $13.24 list from Partstore.com. Part number 1-473-392-11 Mark Z. Yep, no leds just a real cheap multiple on off rotary slider which gets dirty with time. Generally sealed so no air or cleaner will help. And usually requiring just about complete disassembly of the entire unit to get at. Have fun |
#13
Posted to sci.electronics.repair
|
|||
|
|||
Mini Stereo Problem
"Dan_Musicant" wrote in message ... oes it have a remote? Yeah, read the OP. That's a pretty sure clue it has some sort of encoder, and that's the problem. |
#14
Posted to sci.electronics.repair
|
|||
|
|||
Mini Stereo Problem
On Tue, 05 Sep 2006 13:12:28 -0400, tomh wrote:
: : It's a rotary encoder constructed much like a vcr mode switch. No LED : involved. The encoder needs to be replaced, that's all. : : $13.24 list from Partstore.com. Part number 1-473-392-11 : : Mark Z. : : : Yep, no leds just a real cheap multiple on off rotary slider which gets :dirty with time. Generally sealed so no air or cleaner will help. And :usually requiring just about complete disassembly of the entire unit to :get at. Have fun Oh, gee. Maybe it's not worth it to try to replace that. What is a rotary encoder and how does it work? When I spin the dial slowly it seems to work fine. It's when I spin it fast that it seems to "slip." |
#15
Posted to sci.electronics.repair
|
|||
|
|||
Mini Stereo Problem
"Dan_Musicant" wrote in message ... What is a rotary encoder and how does it work? Google for that term. http://zone.ni.com/devzone/conceptd....25680700573BC0 |
#16
Posted to sci.electronics.repair
|
|||
|
|||
Mini Stereo Problem
On Thu, 07 Sep 2006 19:52:57 GMT, "Homer J Simpson"
wrote: : :"Dan_Musicant" wrote in message .. . : : What is a : rotary encoder and how does it work? : :Google for that term. : :http://zone.ni.com/devzone/conceptd....25680700573BC0 : Ah, thanks. I suppose the problem is arising because the light pulses that are being detected aren't entire due to some dirt having infiltrated the device, presumably dust or grease coated dust particles in the case of my kitchen. So I guess the problem will worsen over time and I may find myself trying to replace the encoder. The diagrams in my service manual make it look accessible, but I'm not at all sure. It might take a great deal of disassembly to get at the control board, which is where the encoder evidently is. Even if I can access that board, I have no idea how straightforward the process of replacing the encoder would be. I have fair soldering skills of a pretty conventional kind. I built a number of stereo components from kits when I was in college. This might seriously challenge me, though. I just don't know. |
#17
Posted to sci.electronics.repair
|
|||
|
|||
Mini Stereo Problem
Dan_Musicant wrote:
On Thu, 07 Sep 2006 19:52:57 GMT, "Homer J Simpson" wrote: :"Dan_Musicant" wrote in message ... What is a rotary encoder and how does it work? Google for that term. http://zone.ni.com/devzone/conceptd....25680700573BC0 Ah, thanks. I suppose the problem is arising because the light pulses that are being detected aren't entire due to some dirt having infiltrated the device, presumably dust or grease coated dust particles in the case of my kitchen. So I guess the problem will worsen over time and I may find myself trying to replace the encoder. The diagrams in my service manual make it look accessible, but I'm not at all sure. It might take a great deal of disassembly to get at the control board, which is where the encoder evidently is. Even if I can access that board, I have no idea how straightforward the process of replacing the encoder would be. I have fair soldering skills of a pretty conventional kind. I built a number of stereo components from kits when I was in college. This might seriously challenge me, though. I just don't know. Yeah - except your encoder isn't optical, just metal "feelers" which make and break contact as they pass over the internal contacts in a circular motion. The contacts get tarnished from their silver content, thus the intermittent operation. Mark Z. |
#18
Posted to sci.electronics.repair
|
|||
|
|||
Mini Stereo Problem
"Mark D. Zacharias" wrote in message ... Yeah - except your encoder isn't optical, just metal "feelers" which make and break contact as they pass over the internal contacts in a circular motion. The contacts get tarnished from their silver content, thus the intermittent operation. In which case the cheap / easy fix is to spin it a lot. |
#19
Posted to sci.electronics.repair
|
|||
|
|||
Mini Stereo Problem
On Sat, 09 Sep 2006 17:20:11 GMT, "Homer J Simpson"
wrote: : :"Mark D. Zacharias" wrote in message m... : : Yeah - except your encoder isn't optical, just metal "feelers" which make : and break contact as they pass over the internal contacts in a circular : motion. The contacts get tarnished from their silver content, thus the : intermittent operation. : :In which case the cheap / easy fix is to spin it a lot. : It seems very much like when I spin it not very quickly it works fine. It's when I try for a quick change in volume that it tends to slip. I suppose it will only get worse over time. I presume there's no chance of rejuvenating the current encoder, eh? : |
#20
Posted to sci.electronics.repair
|
|||
|
|||
Mini Stereo Problem
"Dan_Musicant" wrote in message ... It seems very much like when I spin it not very quickly it works fine. It's when I try for a quick change in volume that it tends to slip. I suppose it will only get worse over time. I presume there's no chance of rejuvenating the current encoder, eh? If it's bad contacts, moving it a lot may fix that. Otherwise you need to blow tuner cleaner spray into it (not WD40). But no guarantees. |
#21
Posted to sci.electronics.repair
|
|||
|
|||
Mini Stereo Problem
Homer J Simpson wrote:
"Dan_Musicant" wrote in message ... It seems very much like when I spin it not very quickly it works fine. It's when I try for a quick change in volume that it tends to slip. I suppose it will only get worse over time. I presume there's no chance of rejuvenating the current encoder, eh? If it's bad contacts, moving it a lot may fix that. Otherwise you need to blow tuner cleaner spray into it (not WD40). But no guarantees. No guarantees indeed. For all the labor involved just to get to the thing, it's best just to replace it. I've had spotty luck cleaning these things, even using a fiberglass brush and Caig De-Oxit. The control is pretty well sealed, so you can't just spray stuff in there, you have to take it apart. Given all that, the best option is certainly just to replace the part. Mark Z. |
#22
Posted to sci.electronics.repair
|
|||
|
|||
Mini Stereo Problem
Mark D. Zacharias wrote:
Homer J Simpson wrote: "Dan_Musicant" wrote in message ... It seems very much like when I spin it not very quickly it works fine. It's when I try for a quick change in volume that it tends to slip. I suppose it will only get worse over time. I presume there's no chance of rejuvenating the current encoder, eh? If it's bad contacts, moving it a lot may fix that. Otherwise you need to blow tuner cleaner spray into it (not WD40). But no guarantees. No guarantees indeed. For all the labor involved just to get to the thing, it's best just to replace it. I've had spotty luck cleaning these things, even using a fiberglass brush and Caig De-Oxit. The control is pretty well sealed, so you can't just spray stuff in there, you have to take it apart. Given all that, the best option is certainly just to replace the part. Mark Z. My Aiwa CX-NA888 bookshelf audio system, bought new almost seven years ago, has the same problem. I would simply use the remote to adjust the volume and put up with what little aggravation this might cause. (It seems to me the control on yours is basically working, if it will change the volume smoothly as long as it is rotated slowly; mine is like that too.) I've seen a round component through the air vents in my system which might well be the volume control. As Mark Z. said, though, if the control in yours is sealed tighter than a drum (it wouldn't surprise me if it was), your chances of getting any kind of cleaning solution in there are slim to none. If your system basically works otherwise, I'd just either use the remote for volume up/down or simply be careful how fast the knob on the unit is turned. These sealed controls are not meant to be cleaned, repaired or anything else other than replaced when they go bad. Too bad, but that's offshore engineering for you these days--replace, don't repair. Jeff, WB8NHV (email address not shown to deter spammers) Fairport Harbor, Ohio USA |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Jet Mini lathe overheat problem | Woodturning | |||
Sony DCR-TRV8 Mini DV Camera Problem | Electronics Repair | |||
Powermatic 64A Alignment Problem | Woodworking | |||
Wiring problem | Home Repair | |||
jet mini lathe problem | Woodturning |