Need Minelab Musketeer Advantage schematic

[ivconic]

Correct. I have seen (and downloaded) "RH" schematic from this forum. Right now i dont remember which thread? But comparing with pcb i have, spotted to many differences. Is that schematic faken intentionally or not i cant tell. I am sure it is not schematic of RH. But audio stage is correct on that sch. I checked it point by point. But...not good enough to solve my problem.
As i explained earlier; my RH burned. Accidentally, battery pole (not sure + or -) touched one of pins on earphone socket. I just saw smoke from RH for a moment and that is all.
Later discovered that BSR51 is burned.....When replaced with BC517 (respecting pin assign.) it warmed and burned too. Further i checked all passive components and replaced 4053,4024 and LM339 on right side of pcb and put another BC517 there...Burned again!?
Since i do not recognize rest of ic's i gave up.....
One thing i do remember; until get very hot and burn, BC517 is producing some "teeleek,teelek...hum,hum..." in earphones, than get very hot and burn!
Drop dead like a bad habit!

So i put another device in its housing, adjusted with RH coil and sold it for some money to more-less compensate loss!
Now i have only its pcb and good/bad memories....
Still i am standing at point that RH is very best VLF i ever saw in my life...
Regards!

[Max]

Correct. I have seen (and downloaded) "RH" schematic from this forum. Right now i dont remember which thread? But comparing with pcb i have, spotted to many differences. Is that schematic faken intentionally or not i cant tell. I am sure it is not schematic of RH. But audio stage is correct on that sch. I checked it point by point. But...not good enough to solve my problem.
As i explained earlier; my RH burned. Accidentally, battery pole (not sure + or -) touched one of pins on earphone socket. I just saw smoke from RH for a moment and that is all.
Later discovered that BSR51 is burned.....When replaced with BC517 (respecting pin assign.) it warmed and burned too. Further i checked all passive components and replaced 4053,4024 and LM339 on right side of pcb and put another BC517 there...Burned again!?
Since i do not recognize rest of ic's i gave up.....
One thing i do remember; until get very hot and burn, BC517 is producing some "teeleek,teelek...hum,hum..." in earphones, than get very hot and burn!
Drop dead like a bad habit!

So i put another device in its housing, adjusted with RH coil and sold it for some money to more-less compensate loss!
Now i have only its pcb and good/bad memories....
Still i am standing at point that RH is very best VLF i ever saw in my life...
Regards!

Hi,
can you find a BC879 ? If so... you solved the BSR51 problem... but I suggest you supply the thing by an adjustable current limiter based on the LM317... start with an average of consumption for each active device...sum then add 20%, then fix the limit on regulator... and supply the thing.

Could be an impossible mission know what devices were there so I suggest you remount them all in their place apart the ic that is just before the BSR51... that's probably burnt too (at least at one output).

Best regards,
Max

[ivconic]

I gave up for now. First must have schematic. I changed 4024,LM339 and 4053 cose those 3 were close related to audio output. No benefits. With that sad BSR51 also burned something else from other part of pcb? Something important and now it is provoking more burns at audio...Dissaster! So i gave up to avoid more burns....
Anyway BC517 can replace BSR51...it is not about power here. Some strong component intermodulate through audio and kill any transistor i put there...
Never mind. I will wait until schematic appear....maybe never
There is some guy interested to buy it as it is, so will sell to him maybe...
Or exchange... It is interesting to remove all components from pcb and retrace it, make copies...cose pcb is great and device is legendary. If i had conditions to deal with smt i would do that, but so far i dont....
Interesting thing is its audio - very same i met at Musketeer Colt...the rest are different....
regards

[ivconic]

Another reason "pro" is fact that RH is fully analogue device. It is not a big deal to copy it and make handmades....Gosh! Those would be top detectors as handmades! I can only imagine! Yet problem is schematic...due missing values...Those "wise heads" from Minelab are not stupid at all!

[kt315]

hi Geotechers.

I offer for the exchange this shematic of STERCH-7232. drawn by Anker.

hh

[ivconic]

Now, this looks interesting! If i can only know .ru IC's substitutions?
Do you have pcb?

I am already asking for pcb cose those are hard part for me. The rest is piece of cake....

[kt315]

no, I have not.
are you able to see text in russian in this PDF?

[ivconic]

WOW!!! Cross reference...!
Thanks a lot KT315!!!!

[ivconic]

I am confused again!

According to this cross reference i found 1401UD3 can be replaced (among other ic's which are impossible for me to find) is LM392...!?
Actually it means whole schematic is "populated" with LM392!!! Except 561KT3 which is obviously 4066 or 4016....Wherever you take a look....LM392 is there??
I dont think you can use LM392 all over the place like it was noted on schematic.
I think this cross reference is good to approximately find substitution for ic....but there must be more proper substitution for 1401UD3...as example.

That's why i think; the best way is you to place substitutions on schematic, cose you have more experience - know which ic is sutable to replace present ic....etc...
Might be some job for you....but we will be gratefull much!
Best regards!

[Leto]

1401UD3

Hi Ivconic,

At this thread:
https://www.geotech1.com/thuntings/s...ad.php?t=11979

Originally Posted by Golum
DA3-1401ud3 - LM146, LF444
DA8 - 561KT3 CD4066A, CD4066B
DA11,DA12 - LM224N

Geo probably knows good replacements.

Would be nice to see this one in action..

[kt315]

According to this cross reference i found 1401UD3 can be replaced (among other ic's which are impossible for me to find) is LM392...!?

LM246. look due to. simple rule is - use better replacement than noted in the file and will not be mistaked. the data is not so fresh there.

[ivconic]

Yeah, i missed that!?
Thanks!

[nakky]

[ that is all.
Later discovered that BSR51 is burned.....When replaced with BC517 (respecting pin assign.) it warmed and burned too. Further i checked all passive components and
HI Ivconic,are you sure it is BSR51 ?Or BSR57?Grt Nakky

[ivconic]

Well, print is so blur, i had to use loupe to see it. Not scratched but very blur. One of those Philips genius prints!
Mostly i do use Philips components, and noticed some series are very blur printed...Almost intentionally?
I would swear it is BSR51...although i am not sure!? Now when you mentioned it....dont know what to think?
Anyway, there is BSR51 at Musketeer Colt output, since those are almost the same i assumed that BSR51 must be on RH too... I can see very clear only:
...R51... on it.
Also pin assignemets matching BSR51 specification. Not sure at all.
Good question!
But still i think something else is burned too, not only BSR...

[ivconic]

Wait a minute!? Now i see what are you heading!!!
BSR57 is a FET!

Symmetrical silicon n-channel
depletion type junction field-effect
transistors in a plastic microminiature
envelope intended for application in
thick and thin-film circuits. The
transistors are intended for
low-power, chopper or switching
applications in industrial service.

BSR51 is NPN Darlington transistor in a TO-92; SOT54 plastic

package. PNP complements: BSR60, BSR61 and BSR62.

Cant be BSR57 at all here. My assumption was right...