giving another try to the bias stuff this time I got lucky> the trim pots were turned down so much from their useful range (though it seemed that no one had been inside the amp before me) that slight turns didn't change anything - going 'wilder' resolved the issue and now my 1010 signs as never before . anyone who experiences a 1010 underperforming from his expectations should check the bias values first! having the amp working on the proper bias now has smoothed perfectly out the relentless-ish treble region, firmed the bass, and tightened PRaT - and made an extra radiator in the room (when in active use - i.e. listening to music -, otherwise the heatsinks are just luke warm). moreover, if one converts the amp from 220V to 240V (the SM's pretty useful, and the procedure extremely straightforward) the bias should be re-adjusted, mind you. hope this all can help someone
Be careful! A slip and output transistors gone, or sometimes those trimpots go open, I don't know the quality but replacing them it's not a bad idea..
Thanks for the warning, only if the values are far off the 10mA an I going to mess with them!
... for determining of which you'd need to measure the values still, and this is exactly where that slip could be lethal (though not with the 1010 - it was built with PROTECTION that will stand even a nuclear war)> the pins on the 'check pad' are spaced VERY tightly. what I did, though, was that I pulled very small diameter (less than 1mm) silicone tubings of 0.5cm on the center pin, and after fixing a probe on the outer (1 and 5, respectively) pins, as well - hence even a serious slip of hand with the other probe (which didn't happen, BTW ) won't make a short for sure
The JVC AX-Z1010TN is a "digital" amplifier for a reason: it's designed to capably handle load impedances as low as 4 ohms or even less. Indeed at 2 ohms it provides speakers dynamic power as much as 320 watts per channel.
I bought one NOS too, so are people saying this could be adjusted to sound even better than it does at the moment? Mine's driving Obelisks and doesn't get that hot, but then I'm listening line level and not through the K2
By hesitating I missed out on a complete JVC titanium matching system comprising CD player: XL-Z1011 > amp: AX-R437 > matching cassette player > matching tuner all for £250.
Immaculate condition and working - did I miss an opportunity here?
Hello all,
Been meaning to join for a while. Just to say it was I that bought the 1010 system mentioned above, collected it this morning. I'm a fan of this range and had a 1010 tuner previously, regretting its sale. Indeed this system does have both the 1010 tuner and cassette deck. The cassette in particular has incredible build quality and is the heaviest of the four components. I'm listening to the CD player right now through my yamaha AX-2000 and Polk LSI7s. Phenomenal quality especially the bass register. Being fair to the 437 amp I get the feeling it'll punch above its weight. 580w draw from the mains and heavier than you'd expect. Nice to see mm/mc switching too, and remote. I'll possibly be breaking this system up at some point.
Thanks
Mat