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Old 23rd April 2012, 12:20 AM   #1
DREW028 is offline DREW028  United States
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Default bxi2608d hifonics

Got another hifonics ( really hate these transistors clips) All power supply FETs are shorted, half of the gate resistors are discoloured.




(These parts appear to drive the gates)

Q7 is toasted its marked c3228. Is it ok to use the ksc2690 as a sub again?

Q8 is toasted also. It's marked a1275 (2sa1275 correct?) I plan on ordering from mouser since they have other parts I need but they don't have a1275. Is there a sub I could use?


2SA1275 pdf, 2SA1275 description, 2SA1275 datasheets, 2SA1275 view ::: ALLDATASHEET :::
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Old 23rd April 2012, 01:39 AM   #2
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Have you made a tool to take the clips off?

For the power supply drivers, I've been using the BD139 and BD140 as subs.

The 2690 should work for the NPN driver.
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Old 23rd April 2012, 03:18 AM   #3
DREW028 is offline DREW028  United States
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Havnt made a tool yet. Definitely will now. I used the clips from this amp to finish up the other brutus I have. I called maxxsonic and they told me to try calling Cia engineering and the audio clinic for replacements. I will try them tomorrow.
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Old 23rd April 2012, 04:55 AM   #4
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After you make the tool to remove them, you'll only dislike them instead of hating them. It takes less than 1 second to pop them off.
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Old 25th April 2012, 12:10 AM   #5
DREW028 is offline DREW028  United States
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Any other "common" problems with this amp?
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Old 25th April 2012, 12:28 AM   #6
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If it's using the DWM1216 driver board, Q7, 11, 19 and 22 regularly fail.
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Old 25th April 2012, 01:17 AM   #7
DREW028 is offline DREW028  United States
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Dwm1216fv-v20.

Q11 and 22 are 1d= mmbta42

Q7 and 19 are 2d, guessing these are the mmbta92?


Guess I should stock up on these 2 parts. Are there any other common parts to keep on hand?
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Old 25th April 2012, 01:18 AM   #8
DREW028 is offline DREW028  United States
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Dwm1216fv-v20.

Q11 and 22 are 1d= mmbta42

Q7 and 19 are 2d, guessing these are the mmbta92?


Guess I should stock up on these 2 parts. Are there any other common parts to keep on hand?
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Old 25th April 2012, 07:36 AM   #9
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Yes. MMBTA92.
The SMD Code Book

I've never worked on a 2608 so I don't have any other suggestions.
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Old 25th April 2012, 12:40 PM   #10
DREW028 is offline DREW028  United States
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I meant parts used more often than others for all amplifiers. Or is it better to order what you need when you need it?
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