Does anybody owning one of those, or at least having the user's manual happen to know the frequency response they should have? I've searched in internet for it, even in the manufacturer's website, and haven't been able to find anything.
Just in case someone knows it and shares the information, thanks a lot in advance.
Regards.

just searched my own database - nada.

curious, why do you need the specifications?
One would think that it would be near 20-20k or less.

Hello and thanks for your answer. You just said it...... Curious! That's why I would like to know if possible that specification. They really sound great. I have one myself. Thanks again. Maybe someone around there knows....

after some more searching and not naming things with correct name's - I found this pic and parital email:

I've attached a schematic, hopefully it will be useful to you. You can view it in Microsoft picture and fax viewer and use the + feature to enlarge the image. To use this software, right-click on the file and choose "open with" and then choose "microsoft picture/fax viewer"

See IC 901? That is one of the amps. The other one is the similar looking IC at the upper 1/2 of the schematic. There are parallel circuits here representing right/left channels -- right channel on lower 1/2 and left channel on upper 1/2 of diagram. Again, See IC901? To the right will be downstream of the power amp. To the left is upstream from the amp. If we go slightly left and up from IC901, you will see the line-out junction. If the issue (low volume, one side) is not present in the line outs, then the issue lies between that part of the circuit down to the amplifier. If, however, the problem persists at the line-out junction, then you can effectively rule out the amplifier as well as the volume controls etc. Also, if you bridge (very very carefully) pin 6 of the two amplifiers and the volume normalizes between the two channels, then you can also rule out the amps and speakers and crossover filters. Also, depending upon where in the circuit the problem lies, you can focus your attention on those components and replace them if the values are out of spec. Testing the resistors will be easy. To test the capacitors, you'll need a LCR meter and they are not cheap. Also, I've found that it's simpler to just replace them. After 30 years, you can't go wrong by doing so. To test the diodes, a DMM with that feature can be used. You can similarly test transistors in this manner but I won't go into transistor testing here because it too complicated to explain in an email. Rather, you could purchase a book that describes the testing of semiconductors and passive components much better than I can in an email.

This is only the amp schematic. The tuner schematic I did not include (but I can if you want it). However, I do feel that the equipment necessary to effectively troubleshoot the tuner is out of reach for most do it yourselfers.

Hope you find these tips helpful. If these troubleshooting and diagnostic procedures are beyond your ability, I will be willing to look at your box. You pay shipping and $40 for diagnostic fee which you can apply towards the repair costs. As long as parts are available, the repair can be effected. Depending on the problem and complexity of the repair, it may run up to $160. If I can't fix it, I will not charge a fee except for cost to return it to you. If you like, I'd also be happy to accept your unit as a trade-in for mine. Make me an offer!




an here is a picture of what we were talking about

controls view

Hello again Cassettekid. Thanks a lot for your answer with all the explanation and schematics. Kind regards.

Kanamaster: The amp is not rated for it's frequency response but the cassette deck is rated as follows:

50 - 15khz (CrO2)
50 - 15khz (FeCr)
50 - 15khz (Normal)

These are actually quite good numbers on cassette and compares better than most other boomboxes. The amp itself is probably rated even better.

Cassettkid: I don't know where you dug up that info from but that was from me. It's been awhile but was that an answer I posted in response to a question sent to me on an ebay auction for a Sanyo M9994 that I sold last year?

quote:

Originally posted by Stormin Normin:
Kanamaster: The amp is not rated for it's frequency response

I knew this but that's the answer I received and I thank anyone for any answer.

quote:

Originally posted by Stormin Normin:
but the cassette deck is rated as follows:

50 - 15khz (CrO2)
50 - 15khz (FeCr)
50 - 15khz (Normal)

And now I thank you very much for this info. I could not find it anywhere else.

By the way, a little strange that the frequency response with CrO2 is the same as with normal tapes. Isn't it?

quote:

Originally posted by kanamaster:
By the way, a little strange that the frequency response with CrO2 is the same as with normal tapes. Isn't it?

Not really. The specs only refer to the tape position and nothing to do with the actual tape you are using. The circuitry can reproduce that frequency range. The limitation is going to be your actual cassettes.

quote:

Originally posted by Stormin Normin:
The specs only refer to the tape position and nothing to do with the actual tape you are using. The circuitry can reproduce that frequency range. The limitation is going to be your actual cassettes.

This make's perfect sense to me, but make's me wonder about some [ specifications - read! ] elsewhere ' with- cheaper tape recorder's -or- NOT published only concerning their tape decks '...

THAT { under-report } - or not at all,,, their Frequency-responce ... Cause recording a cassette with them they actually sound better than some EXPensive Deck's!