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Old 12th March 2013, 06:14 PM   #1
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Default Crunch mono help please

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)
Attached Images
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File Type: jpg DSCF1991.jpg (282.4 KB, 172 views)
File Type: jpg HPIM0582.jpg (327.3 KB, 168 views)
File Type: jpg HPIM0557.jpg (217.4 KB, 157 views)
File Type: jpg HPIM0561.jpg (249.5 KB, 155 views)

Last edited by KriszXJR; 17th February 2014 at 12:46 PM.
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Old 13th March 2013, 02:48 AM   #2
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Join Date: Nov 2003
Location: Louisiana
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.
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Old 13th March 2013, 06:38 PM   #3
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BE 2SB1260
BF 2SB1308
82 2SC5009
G1 MMBT5551
Is this correct?
And T4 is 1N4148W
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Old 13th March 2013, 11:03 PM   #4
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Join Date: Nov 2003
Location: Louisiana
Where is the BF transistor? Do you mean DF (2SD1898).
http://www.mccsemi.com/up_pdf/2SD1898%28SOT-89%29.PDF

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.

T4:
http://www.mccsemi.com/up_pdf/1N4148WX%28SOD323%29.pdf

G1:
http://datasheet.octopart.com/MMBT55...t-11755538.pdf

For Q11, a 2SC2412k is generally used there.
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Old 14th March 2013, 07:57 AM   #5
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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?
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Old 14th March 2013, 08:32 AM   #6
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Location: Louisiana
I think that they will be suitable replacements but I've never tried them.
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Old 19th March 2013, 07:29 PM   #7
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Click the image to open in full size. Click the image to open in full size.
My schematics is correct??
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Old 19th March 2013, 07:31 PM   #8
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Images url:
http://kepfeltoltes.hu/view/130319/DSCF2591_www.kepfeltoltes.hu_.jpg
http://kepfeltoltes.hu/view/130319/DSCF2592_www.kepfeltoltes.hu_.jpg

Please!
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Old 19th March 2013, 09:38 PM   #9
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Join Date: Nov 2003
Location: Louisiana
That's correct. This is a similar board.
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File Type: jpg IMG_9279bx.jpg (181.2 KB, 48 views)
File Type: gif partial power supply board.gif (29.4 KB, 64 views)
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Old 20th March 2013, 07:29 AM   #10
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Many thanks!
In my sch no gnd.
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