wont turn on 2, linear power 4753 iq. - diyAudio
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Old 3rd November 2005, 05:23 AM   #1
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Default wont turn on 2, linear power 4753 iq.

this is for a linear power 4753 iq. i wanted to keep it separate from the 2.2 thread.. so i did the same readings. only when i touch the +b lead i get a small spark. here are the pwm readings. it is a:

SG3526N chip

pin 1: 4.98 volts
pin 2: 0.002 volts
pin 3: 4.20 volts
pin 4: 4.65 volts
pin 5: 4.98 volts
pin 6: 0.002 volts
pin 7: 0.002 volts
pin 8: 4.95 volts
pin 9: 3.57 volts
pin 10: 1.876 volts
pin 11: 0.002 volts
pin 12: 4.31 volts
pin 13: 4.69 volts
pin 14: 10.78 volts
pin 15: 0.003 volts
pin 16: 4.68 volts
pin 17: 10.78 volts
pin 18: 4.98 volts

it is possible that hte 10.78 volt readings are because the power source i was using was possibly losing power.

thanks guys i appreciate any and all comments.
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Old 3rd November 2005, 09:10 AM   #2
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This supply also looks like it's up and running.

The low voltage is likely due to a low power supply input voltage.

What are the part numbers on the power supply transistors?

Can you email me high res photos of the two amplifiers (2.2 and 4753)?

babin_perry@yahoo.com
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Old 3rd November 2005, 02:34 PM   #3
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Default ill email pics tonight.

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Old 3rd November 2005, 03:48 PM   #4
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I have a LP 4753IQ, but it runs fine. I'll keep an eye on this thread and see if I can help if you need anything.
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Old 3rd November 2005, 03:54 PM   #5
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Default THANKS BOOM

MIGHT YOU HAVE ANY LP STUFF FORSALE?
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Old 3rd November 2005, 04:12 PM   #6
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Default Re: THANKS BOOM

Quote:
Originally posted by IMPALAMAN1
MIGHT YOU HAVE ANY LP STUFF FORSALE?
No. I currently running an LP 2002 thru an AudioControl 2XS (so I can bridge it) to a JL Audio Microsub 8.2 (2X8" 8W1's), and a LP 4753IQ to a set of JL Audio XR 650 CSi's.

They have some decent Linear Power amps on eBay this week. I bought my 4753IQ off ebay.
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Old 3rd November 2005, 04:22 PM   #7
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Default HIT ME UP ON EMAIL

I would like to keep this topic to the amplifier in question can you email me I would love to talk lp with ya.

impalaman1@yahoo.com
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Old 4th November 2005, 06:12 AM   #8
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Default cant see em

ill get the buss bars off and read them over the weekend... ill keep you posted.
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