- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Head straight to the (European) electrotanya website, which offers free downloads of a wide range of service manuals. No registration is required either.
The Pioneer SA-600 schematic shows both voltages and currents. For this amp, the total current for left & right output modules (no signal) is 60mA. No-load voltage is 58 volts, dropping to 48 volts (one channel driven, 25 watts out).
It sounds like the magnetron may have
either failed or is not being supplied with the extremely high
voltage required to run it.
YOUR
SAFETY IS PARAMOUNT
This is a job for a professional but if
you are safety clued up, here's instruction. Make sure the !!!!any
capacitors are discharged!!!!! before attempting any sort of
repair. Check the door interlock switches first then the high
voltage diode with either an AVO model 8 or moving coil meter on high
resistance range for short circuit, (DVM's won't show the fault!),
the capacitor can fail and go short circuit, the feed fuse on the
primary of the high voltage transformer and then finally, the
magnetron is best checked by substitution.
A manual may be available at www.emanuals.com Hope that helps.
I don't know how to change the tuning step from .2 Mhz to .1 Mhz, but whatever you do - don't adjust those tunable slugs! If you are told to - I would be very suspect of any procedure that says you must. Those types of coils are adjusted by a threaded iron core that when turned by the slot on top, either raise up from or slide down into the coil. Furthermore, use of a metal screwdriver is a big no-no to make those adjustments. Specially made fiberglass tweaker tools are used to adjust or tune these iron slugs, and often require special equipment (o-scope, DMM, etc) or other specific detailed procedure for proper setup. Fiberglass is used as it does not interact with the iron slug like a metal screwdriver would (appearing as more metal) by affecting the magnetic field of the coil. It has nothing to due with electric shock protection. Good luck!
You have a US tuner not a European one. Only European tuners can change the even numbers. USA uses the odds. As far as I know, the US models aren't capable of tuning to the evens.
This is a firmware restriction. US version would tune from 87.5 to 107.9MHz at 0.20MHz interval (steps) while European versions would tune from 87.5
to 108MHz at 0.05MHz interval (steps).
In some versions, there is a resistor/diode matrix on the logic circuitry that selects the region of usage. But of course this would require opening the unit up and somebody who is very very familiar with digital and analog circuitry and components as well as surface mounted component soldering.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.
do you use the external FM antena ?
there is no software to change, yes there is a difference in the ranges on the FM waveband between US and Euro, but it should still work, however a quick call to bose bv service might be insightfull, and helpful
I have the same mixer and I moved from the States to the UK. I just bought a really good power step-down converter (has to be step-down rather than a standard adapter, and watch the wattage of the adapter). It worked fine.
The signal detection used in both radios and TV sets is via special voltage sensitive diodes which alter capacity as the voltage across the diode changes.
You actually change the voltage across the diodes as you move the tuning dial.
In your case the diode only sees one voltage and is locked to a certain station, because you are not altering the capacity to re-tune to another station...
So it appears that you have lost the ability to alter the DC voltage across the diode...
The design of the tuning knob may be where this fault lies, where the physical action of turning the tuning knob does not transfer the mechanical action to the item that changes the DC voltage to the diode....maybe you have systen that uses a long cord would around pulleys that gives you nice control over the tuning maybe its just a broken tuning cord...
Maybe the tuning is done by just a simple variable resistor I'm not familiar with this system but I have given you the bascics to start on...Unplug the cord from the AC wall socket then remove the top of the cabinet and have a look to see what moves when you turn the tuning knob it will soon become apparent if there is nothing moving when you turn the knob and thus lead you on to the problem....
Maybe the knob is just loose on its drive shaft...
Here is a link to the manual:
http://books.jvcservice.com/download/718134980/32506.pdf
There does not appear to be a way to set tuning to european standards. Is there a particular reason you want to be able to tune those frequencies?
×