jaycar response 2x150 blown - Page 4

wrxer · 14th January 2012, 01:55 PM

Hi all, i have replaced the output transistors with a matching sets of TIP35 and TIP36.

Now this amp was testing ok before with the odd outputs, so i plugged it in and it fired up for around 30 secs with only a 10amp fuse for testing. It then blew the fuse, i replaced it and it blew even without the volume up at all.
I unplugged it and 2 of the new outputs were blown, i replaced them with 2 I removed earlier, reconnected and it blew the fuse again.
The amp will accept the power leads fine, and it blows the fuse about 3 secs after the amp turns on. The power transisters are ok, and the output transisters are fine as well,

Where should i be looking

Perry Babin · 14th January 2012, 05:48 PM

Were the original transistors TIP35s/36s?

wrxer · 15th January 2012, 12:02 AM

Quote:

Originally Posted by Perry Babin

Were the original transistors TIP35s/36s?

Yes, the difference is that the new ones have a 220 insulated case, still with the exposed rear. i have maintained the insulation behind the TIP35/36 and only test clamped.

I will try replacing the TIP35/36 back to the mismatched set and test, as these tested ok before.

wrxer · 15th January 2012, 11:42 AM

I replaced the TIPs and its going ok. The amp has promptly blown my sub once i got the fuses in and wound it up. Now the sub rattles. I will replace it and try again.

14th January 2012, 05:48 PM	#32
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Were the original transistors TIP35s/36s? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

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14th January 2012, 01:55 PM	#31
wrxer diyAudio Member Join Date: Nov 2011 Location: perth, west australia	Hi all, i have replaced the output transistors with a matching sets of TIP35 and TIP36. Now this amp was testing ok before with the odd outputs, so i plugged it in and it fired up for around 30 secs with only a 10amp fuse for testing. It then blew the fuse, i replaced it and it blew even without the volume up at all. I unplugged it and 2 of the new outputs were blown, i replaced them with 2 I removed earlier, reconnected and it blew the fuse again. The amp will accept the power leads fine, and it blows the fuse about 3 secs after the amp turns on. The power transisters are ok, and the output transisters are fine as well, Where should i be looking

15th January 2012, 11:42 AM	#34
wrxer diyAudio Member Join Date: Nov 2011 Location: perth, west australia	I replaced the TIPs and its going ok. The amp has promptly blown my sub once i got the fuses in and wound it up. Now the sub rattles. I will replace it and try again.

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