I'm about to put in an order for some parts to repair an older hitachi
amp. On the preamp section is a little diode that is physically broken.
I'm having a hard time cross referencing it. The board is marked CR-12
(control rectifier 12?).
It is a barrel shaped axial-lead pellet (2.5mm x 3.5mm) of white ceramic with a brown stripe on one end. It is marked N 1 6 followed by the hitachi symbol. I'm not well versed in electronics, but I've seen hundreds of these thing on boards, yet I cannot find a similar image online. None of the parts suppliers can cross ref it. Hitachi cannot help me. A local "electronics guy" doesn't know what to make of N 1 6.
Anyone know what common diode I can safely replace this with?
amp. On the preamp section is a little diode that is physically broken.
I'm having a hard time cross referencing it. The board is marked CR-12
(control rectifier 12?).
It is a barrel shaped axial-lead pellet (2.5mm x 3.5mm) of white ceramic with a brown stripe on one end. It is marked N 1 6 followed by the hitachi symbol. I'm not well versed in electronics, but I've seen hundreds of these thing on boards, yet I cannot find a similar image online. None of the parts suppliers can cross ref it. Hitachi cannot help me. A local "electronics guy" doesn't know what to make of N 1 6.
Anyone know what common diode I can safely replace this with?
Diodes are usually called out as CR or D numbers on schematics.
D is obvious - diode
CR is an old term that hangs on by tradition - it means Crystal Rectifier.
In your case, what does the diode do in the circuit. In the preamp it is unlikely to be a tunnel diode or something, so it is either a rectifier or blocking device, or it is a zener.
D is obvious - diode
CR is an old term that hangs on by tradition - it means Crystal Rectifier.
In your case, what does the diode do in the circuit. In the preamp it is unlikely to be a tunnel diode or something, so it is either a rectifier or blocking device, or it is a zener.
This may be the only image available of the little culprit on the web.
But this is exactly what it looks like. Component without leads is 2.5mm x 3.5mm. Mine is off-white with a brown band at the cathode end.
There are half a dozen more of them on the board, all hitachi, with varying numbers (values?) on them.
This is really starting to worry me.
An externally hosted image should be here but it was not working when we last tested it.
But this is exactly what it looks like. Component without leads is 2.5mm x 3.5mm. Mine is off-white with a brown band at the cathode end.
There are half a dozen more of them on the board, all hitachi, with varying numbers (values?) on them.
This is really starting to worry me.
I measured .60v drop across the diode.
Someone suggested this is in the range
of a common silicon switching diode.
But they also suggested that in matching
it I pay attention to the peak inverse voltage,
peak fwd current, and Trr (reverse recovery time)
/ switching time.
Good lord. This is troublesome little
devil.
Someone suggested this is in the range
of a common silicon switching diode.
But they also suggested that in matching
it I pay attention to the peak inverse voltage,
peak fwd current, and Trr (reverse recovery time)
/ switching time.
Good lord. This is troublesome little
devil.
It is a model 710a. Serial 11133. Could not find a date of manufacture.
It is labeled made in Japan. Here is a Japanese web page referring to it. It is a babelfish xlation, so it makes little sense, but the photos are exactly as mine.
http://translate.google.com/transla...10&hl=en&lr=&safe=off&rls=com.microsoft:en-US
And here is a link to some photos I uploaded along with a better explanation of what I'm dealing with.
http://www.dutchforce.com/~eforum/index.php?act=ST&f=24&t=8097&st=0#entry63062
Thank you very much for checking on this.
It is labeled made in Japan. Here is a Japanese web page referring to it. It is a babelfish xlation, so it makes little sense, but the photos are exactly as mine.
http://translate.google.com/transla...10&hl=en&lr=&safe=off&rls=com.microsoft:en-US
And here is a link to some photos I uploaded along with a better explanation of what I'm dealing with.
http://www.dutchforce.com/~eforum/index.php?act=ST&f=24&t=8097&st=0#entry63062
Thank you very much for checking on this.
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