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Old 19th June 2012, 01:12 PM   #1
srinath is offline srinath  United States
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Default parasound hca 1000 blows fuses

I have a parasound hca1000 that I picked up to work on.
The amp blows the 2 4 amp gma fuses on the left side at power up. The main fuse isn't blowing and the right side also is fine. It makes sound in 1 channel only obviously.

Has anyone had this happen and could point me to where the problem can lie ?

Thanks.
Srinath.
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Old 19th June 2012, 03:16 PM   #2
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Do you know the approximate voltages and currents at this fuse. If do, place an incandescent lamp replacing temporarily the fuse, the see the lamp bright: if there is a sudden flash, a continuous bright, etc. This will give U a first idea of the issue in your set.
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Old 20th August 2012, 10:36 PM   #3
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Default THE SAME PROBLEM WITH ME.

HI EVEREYONE. I HAVE PARASOUND 1000 HAS SAME PROBLEM. AND I STILL DON T KNOW HOW FIX. EXPERIENCED MAN, PL HELP ME TO FIX. THANKS ALOT.
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Old 20th August 2012, 10:39 PM   #4
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Quote:
Originally Posted by Osvaldo de Banfield View Post
Do you know the approximate voltages and currents at this fuse. If do, place an incandescent lamp replacing temporarily the fuse, the see the lamp bright: if there is a sudden flash, a continuous bright, etc. This will give U a first idea of the issue in your set.
THANKS MR OSVALDO DE BANFIELD.
CAN U SHOW ME CLEARLY HOW FIX IT? THANKS A LOT
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Old 21st August 2012, 05:09 AM   #5
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Needs major repair. Probably broken output transistors.
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Old 21st August 2012, 06:13 AM   #6
AJT is offline AJT  Philippines
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Quote:
Originally Posted by learnaudio View Post
THANKS MR OSVALDO DE BANFIELD.
CAN U SHOW ME CLEARLY HOW FIX IT? THANKS A LOT
posting in all caps is like shouting.....it is rude....please don't do that again....
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Old 23rd August 2012, 07:57 PM   #7
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Originally Posted by Tony View Post
posting in all caps is like shouting.....it is rude....please don't do that again....
im sorry about that. honestly, my english is limit. bros have a good day.
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Old 3rd September 2012, 10:12 PM   #8
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hi experts. can u help me? i hooking up with one channel now. sound so pour. thanks
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Old 3rd September 2012, 10:26 PM   #9
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it can be a few problems, the first thing I would do is check the output transistors of the broken channel. DO THIS ONLY IF YOU KNOW WHAT YOU ARE DOING: other way leave it to a qualify person.

PS: even though some amps are unplug they "still" have some high voltages ( charged caps) work on your amp ONLY if you know what you are doing!

Last edited by lanchile; 3rd September 2012 at 10:29 PM.
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