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KriszXJR 12th March 2013 06:14 PM

Crunch mono help please
5 Attachment(s)
I have a Crunch amp, but all power fets (FQP65N06) burned.
The driver board too...
I will replace fets, but what parts replace in the driver board?
What is the reason that (BE 317) burned?
Marked BE317 transistor similar?
Marked T4 diode similar?
Marked G1 transistor similar?
Replace FPQs to STP60NF06?
Please help me Perry :)
Many thanks!
(Sorry for my english)

Perry Babin 13th March 2013 02:48 AM

BE is the marking. It's a 2SB1260.

I don't see any reference for the diode but the 1ss355 is commonly used in this location. The 1N4148W-V may also be a good sub.

I don't know what the G1 transistors are.

I'd use the original FETs if they're available.

KriszXJR 13th March 2013 06:38 PM

BE 2SB1260
BF 2SB1308
82 2SC5009
G1 MMBT5551
Is this correct?
And T4 is 1N4148W

Perry Babin 13th March 2013 11:03 PM

Where is the BF transistor? Do you mean DF (2SD1898).

There are different codes for the same part from different manufacturers. After a bit of searching, it seems that the components from MCC seem to fit at least 2 or the parts.



For Q11, a 2SC2412k is generally used there.

KriszXJR 14th March 2013 07:57 AM

Sorry, yes DF.
Many thanks!
I search components, but Hungarian distributors not 1260 and 1898.
But I think BCX53 and BCX56 are good.
I can order that components.
Can I replace BE -> BCX53 and DF -> BCX56?

Perry Babin 14th March 2013 08:32 AM

I think that they will be suitable replacements but I've never tried them.

KriszXJR 19th March 2013 07:29 PM
My schematics is correct??

KriszXJR 19th March 2013 07:31 PM

Images url:


Perry Babin 19th March 2013 09:38 PM

2 Attachment(s)
That's correct. This is a similar board.

KriszXJR 20th March 2013 07:29 AM

Many thanks!
In my sch no gnd.

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