I measure with my multimeter which has a diode stand, this zener measures both way's so I think you are right. Anyway I will replace this one.The 4.3v zenner is probably gone.
So far I found R384 (with the modification capacitor of 2,2 nF) of the 1/4W resitors was burned.A bunch of those 1/4w resistors will also be gone.
Which post do you mean in particular?Search previous posts on this issue and you will find many answers. Good luck!
With that kind of damage. There is bound to be a handful of burnt up resistors , diodes and even capacitors.
2SA1302 --> MJL1302
2SC3281 --> MJL3281
Better yet and available.
http://www.mouser.com/ds/2/308/MJL4281A-D-113116.pdf
I measure with my multimeter which has a diode stand, this zener measures both way's so I think you are right. Anyway I will replace this one.
So far I found R384 (with the modification capacitor of 2,2 nF) of the 1/4W resitors was burned.
The power-transistors base resistors R352,356,358,360.
R368 which has been shorted by Q318.
Which post do you mean in particular?
This is the list of damaged parts I found till now:
Q310 2SA970
Q312 2SC2240
Q316 2SA1306(B)
Q318 2SC3280
Q322 2SC3280
Q324 2SA1301
Q326 2SC3280
Q330 2SA1145
R372 0.22
R376 0.22
R378 0.22
R380 0.22
R352 2.2
R356 2.2
R358 2.2
R360 2.2
R368 68
R384 4700
D334 RD4.3FB
I did search this forum and other sites and made this list of replacements. Do you think these are the good types?
Original --> Replacement
2SA970 --> KSA992
2SA1145 -->KSA1013YTA
2SC2240 --> KSC1845
2SC2705 --> KSC2383YTA
2SA1306(B) --> 2SA1837
2SC3298(B) -->2SC4793
2SA1358 --> 2SC3902T
2SC3421 --> BD139?
2SA1301 --> 2SA1943
2SC3280 --> 2SC5200
2SA1302 --> MJL1302
2SC3281 --> MJL3281
I read that I should replace all the end- and power-transistors, what about the others that seem to be oké?
Thanks in advance!
This 4.3 V 1 W zenerdiode is showing in both directions about 1.6 kΩ, it's in the I-AMP circuit so no big supprise it's gone. The original type RD4.3FB isn't available, do you think I could replace it with a regular one like BZX85C4V3?The zenner is suppose to show resistance both ways, with one direction showing resistance in the megaohm range. If resistance is low in both directions, then is gone. I would be really surprised if it is still good. i would replace it.
The original type RD4.3FB isn't available, do you think I could replace it with a regular one like BZX85C4V3?
I gotta ask. Where in the work are we to get 47000uf 63v caps or the 40000uf 50v caps? My 1000 is running fine but I think I see about a 1/16 in bulge at the top. Or is a very slight bulge normal on the massive caps. Sorry to hijack.
Hi Crazeehorse,I gotta ask. Where in the work are we to get 47000uf 63v caps or the 40000uf 50v caps?
Hi,
I've just bought a MX-1000, it seems to be working fine.....
Welcome to AK!
Avionic is allways on the money, most likely something shifted during shipping, albeit, it is the first time I see an MX do this.
one question: did you actually listen to some tunes already?
if not,
try to see what AC voltage you have at the terminals..before you connect a set of speakers.
good luck!