Relay
- Thread starter sssboa
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Yeah relay could definitely cause you all kinds of problems and these do deteriorate over time. Basically they lose the ability to open and close when they're supposed to.
This is a relay. I don't know what its purpose is. Could it be a speaker protection relay? I don't have the service manual. It's Hitachi TRK-8130E.Superduper said:
I already bought a replacement, but don't know if its compatible for sure. It is Fujitsu FBR111CD012 Input: DC. Contacts: SPDT. Contact Ratings: 3Amp. Coil Voltage: 12VDC. Coil Resistance: 390 Ohm . Mech Mtg: PCB 5 pin. Looks like below.
I couldn't find much about the use, but this clip from a PDF might shed some light for techies like Norm.
US Miniature, general purpose, single pole changeover relays with an industry standard footprint.
Low power consumption.
Silver contacts rated 3A.
US Miniature, general purpose, single pole changeover relays with an industry standard footprint.
Low power consumption.
Silver contacts rated 3A.
Oh, I'm not disputing that it's a relay. I'm merely saying I have never seen a relay in a boombox before. Ever. And I have seen a lot of boomboxes. And why do you want to change it? Is something wrong? If not, just wait until there is a problem. Might be never.
What could it be for? If Bobby's Datasheet is any indication, it's merely a single pole relay. I doubt it would be for speaker protection, would need 2 poles for that. More likely for switching of AC/DC operation but then again, without following the traces to see what is actually being switched, that little photo of the corner really can't tell us anything. If somebody has a schematic, we could find out pretty easily.
What could it be for? If Bobby's Datasheet is any indication, it's merely a single pole relay. I doubt it would be for speaker protection, would need 2 poles for that. More likely for switching of AC/DC operation but then again, without following the traces to see what is actually being switched, that little photo of the corner really can't tell us anything. If somebody has a schematic, we could find out pretty easily.
My Hitachi TRK-9300 makes a click noise a couple of seconds after you turn it on and off. Maybe it’s part of the on/off pop suppression circuitry??
The trk-9300 is a larger 3-pc unit right? But the one in question is a smallish 1-pc box. Jimmy, when you turn on your box, are the speakers muted until the click?jimmyjimmy19702010 said:
I don't want to cause panic on the forum but 40 year old relay is a ticking bomb and a dirty oneSuperduper said:
What does it mean 1-pc? Maybe it's a small boombox but I don't hear difference between this and my Hitachi TRK-8080e, which is how many pc?Superduper said:
What does it mean 1-pc? Maybe it's a small boombox but I don't hear difference between this and my Hitachi TRK-8080e, which is how many pc?1 piece - speakers and main cabinet all in 1 piece.sssboa said:I don't want to cause panic on the forum but 40 year old relay is a ticking bomb and a dirty oneThe trk-9300 is a larger 3-pc unit right? But the one in question is a smallish 1-pc box. Jimmy, when you turn on your box, are the speakers muted until the click?Superduper said:
3 piece - speakers housed in separate cabinets that attach to the centre cabinet.
actually the only two piece box I know of is made by Hitachi.sssboa said:Oh, so there's no 2 piece I guess1 piece - speakers and main cabinet all in 1 piece.
3 piece - speakers housed in separate cabinets that attach to the centre cabinet.
Sorry Bobby I don't know the model number I think you guys remember seeing it it's the one that's like a mono box with extra speaker on the side it's designed like a one piece box but only one speaker is removable.
So this is an interesting discussion. I've never seen a relay in a boombox before but then again, I only own a couple of Hitachi's & those I have don't employ them since being a mechanical component, they aren't as reliable as a solid state solution. For example, the Sanyo M9990 uses a solid state switching solution using a pair of power transistors to do the switching. It would've been much simpler to do it with a relay but since boomboxes don't consume as much current as a home audio system, apparently the Sanyo engineers felt that the same task could be accomplished more reliably with solid state components.
Anyhow, after hearing of relays in Hitachi's, I browsed a few Hitachi service manuals and discovered that the 9140 uses a relay that apparently is for powering up the boombox when the cassette motor receives power. The 9900 also uses a relay but in this case, it appears to be the switch that powers up the boombox. It is also a 2-pole relay so there is another function which I didn't investigate further.
So, I guess in certain Hitachi's, there are relays. Anyone know of another major manufacturer that used relays in their boomboxes?
Anyhow, after hearing of relays in Hitachi's, I browsed a few Hitachi service manuals and discovered that the 9140 uses a relay that apparently is for powering up the boombox when the cassette motor receives power. The 9900 also uses a relay but in this case, it appears to be the switch that powers up the boombox. It is also a 2-pole relay so there is another function which I didn't investigate further.
So, I guess in certain Hitachi's, there are relays. Anyone know of another major manufacturer that used relays in their boomboxes?
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